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new file mode 100644
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+{"parentUuid":"6afe5f5f-c5bc-4a02-8adb-37d83aeb078b","isSidechain":false,"promptId":"bf1a2a8c-5f1a-4688-91c9-f9d2413ee03d","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01QY63Gm5K7K3wg4n4RffQGx","type":"tool_result","content":"1\t// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n2\t// All rights reserved. This file is part of cc-backend.\n3\t// Use of this source code is governed by a MIT-style\n4\t// license that can be found in the LICENSE file.\n5\t\n6\t// This file implements checkpoint persistence for the in-memory metric store.\n7\t//\n8\t// Checkpoints enable graceful restarts by periodically saving in-memory metric\n9\t// data to disk in JSON or binary format. The checkpoint system:\n10\t//\n11\t// Key Features:\n12\t//   - Periodic background checkpointing via the Checkpointing() worker\n13\t//   - Two format families: JSON (human-readable) and WAL+binary (compact, crash-safe)\n14\t//   - Parallel checkpoint creation and loading using worker pools\n15\t//   - Hierarchical file organization: checkpoint_dir/cluster/host/timestamp.{json|bin}\n16\t//   - WAL file: checkpoint_dir/cluster/host/current.wal (append-only, per-entry)\n17\t//   - Only saves unarchived data (archived data is already persisted elsewhere)\n18\t//   - GC optimization during loading to prevent excessive heap growth\n19\t//\n20\t// Checkpoint Workflow:\n21\t//  1. Init() loads checkpoints within retention window at startup\n22\t//  2. Checkpointing() worker periodically saves new data\n23\t//  3. Shutdown() writes final checkpoint before exit\n24\t//\n25\t// File Organization:\n26\t//\n27\t//\tcheckpoints/\n28\t//\t  cluster1/\n29\t//\t    host001/\n30\t//\t      1234567890.json  (JSON format: full subtree snapshot)\n31\t//\t      1234567890.bin   (binary format: full subtree snapshot)\n32\t//\t      current.wal      (WAL format: append-only per-entry log)\n33\t//\t    host002/\n34\t//\t      ...\n35\tpackage metricstore\n36\t\n37\timport (\n38\t\t\"bufio\"\n39\t\t\"context\"\n40\t\t\"encoding/json\"\n41\t\t\"errors\"\n42\t\t\"fmt\"\n43\t\t\"io/fs\"\n44\t\t\"os\"\n45\t\t\"path\"\n46\t\t\"path/filepath\"\n47\t\t\"sort\"\n48\t\t\"strconv\"\n49\t\t\"strings\"\n50\t\t\"sync\"\n51\t\t\"sync/atomic\"\n52\t\t\"time\"\n53\t\n54\t\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n55\t\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n56\t)\n57\t\n58\tconst (\n59\t\tCheckpointFilePerms = 0o644                    // File permissions for checkpoint files\n60\t\tCheckpointDirPerms  = 0o755                    // Directory permissions for checkpoint directories\n61\t\tGCTriggerInterval   = DefaultGCTriggerInterval // Interval for triggering GC during checkpoint loading\n62\t)\n63\t\n64\t// CheckpointMetrics represents metric data in a checkpoint file.\n65\t// Whenever the structure changes, update MarshalJSON as well!\n66\ttype CheckpointMetrics struct {\n67\t\tData      []schema.Float `json:\"data\"`\n68\t\tFrequency int64          `json:\"frequency\"`\n69\t\tStart     int64          `json:\"start\"`\n70\t}\n71\t\n72\t// CheckpointFile represents the hierarchical structure of a checkpoint file.\n73\t// It mirrors the Level tree structure from the MemoryStore.\n74\ttype CheckpointFile struct {\n75\t\tMetrics  map[string]*CheckpointMetrics `json:\"metrics\"`\n76\t\tChildren map[string]*CheckpointFile    `json:\"children\"`\n77\t\tFrom     int64                         `json:\"from\"`\n78\t\tTo       int64                         `json:\"to\"`\n79\t}\n80\t\n81\t// lastCheckpoint tracks the timestamp of the last checkpoint creation.\n82\tvar (\n83\t\tlastCheckpoint   time.Time\n84\t\tlastCheckpointMu sync.Mutex\n85\t)\n86\t\n87\t// Checkpointing starts a background worker that periodically saves metric data to disk.\n88\t//\n89\t// The checkpoint interval is read from Keys.CheckpointInterval (default: 12 hours).\n90\t//\n91\t// Format behaviour:\n92\t//   - \"json\": Writes a JSON snapshot file per host every interval\n93\t//   - \"wal\":  Writes a binary snapshot file per host every interval, then rotates\n94\t//     the current.wal files for all successfully checkpointed hosts\n95\tfunc Checkpointing(wg *sync.WaitGroup, ctx context.Context) {\n96\t\tlastCheckpointMu.Lock()\n97\t\tlastCheckpoint = time.Now()\n98\t\tlastCheckpointMu.Unlock()\n99\t\n100\t\tms := GetMemoryStore()\n101\t\n102\t\twg.Go(func() {\n103\t\t\td := 12 * time.Hour // default checkpoint interval\n104\t\t\tif Keys.CheckpointInterval != \"\" {\n105\t\t\t\tparsed, err := time.ParseDuration(Keys.CheckpointInterval)\n106\t\t\t\tif err != nil {\n107\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> invalid checkpoint-interval %q: %s, using default 12h\", Keys.CheckpointInterval, err)\n108\t\t\t\t} else {\n109\t\t\t\t\td = parsed\n110\t\t\t\t}\n111\t\t\t}\n112\t\n113\t\t\tticker := time.NewTicker(d)\n114\t\t\tdefer ticker.Stop()\n115\t\n116\t\t\tfor {\n117\t\t\t\tselect {\n118\t\t\t\tcase <-ctx.Done():\n119\t\t\t\t\treturn\n120\t\t\t\tcase <-ticker.C:\n121\t\t\t\t\tlastCheckpointMu.Lock()\n122\t\t\t\t\tfrom := lastCheckpoint\n123\t\t\t\t\tlastCheckpointMu.Unlock()\n124\t\n125\t\t\t\t\tnow := time.Now()\n126\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> start checkpointing (starting at %s)...\", from.Format(time.RFC3339))\n127\t\n128\t\t\t\t\tif Keys.Checkpoints.FileFormat == \"wal\" {\n129\t\t\t\t\t\t// Pause WAL writes: the binary snapshot captures all in-memory\n130\t\t\t\t\t\t// data, so WAL records written during checkpoint are redundant\n131\t\t\t\t\t\t// and would be deleted during rotation anyway.\n132\t\t\t\t\t\twalCheckpointActive.Store(true)\n133\t\t\t\t\t\tn, hostDirs, err := ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), now.Unix())\n134\t\t\t\t\t\tif err != nil {\n135\t\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> binary checkpointing failed: %s\", err.Error())\n136\t\t\t\t\t\t}\n137\t\t\t\t\t\tif n > 0 {\n138\t\t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> done: %d binary snapshot files created\", n)\n139\t\t\t\t\t\t\tlastCheckpointMu.Lock()\n140\t\t\t\t\t\t\tlastCheckpoint = now\n141\t\t\t\t\t\t\tlastCheckpointMu.Unlock()\n142\t\t\t\t\t\t\t// Rotate WAL files for successfully checkpointed hosts.\n143\t\t\t\t\t\t\tRotateWALFiles(hostDirs)\n144\t\t\t\t\t\t}\n145\t\t\t\t\t\twalCheckpointActive.Store(false)\n146\t\t\t\t\t\twalDropped.Store(0)\n147\t\t\t\t\t} else {\n148\t\t\t\t\t\tn, err := ms.ToCheckpoint(Keys.Checkpoints.RootDir, from.Unix(), now.Unix())\n149\t\t\t\t\t\tif err != nil {\n150\t\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> checkpointing failed: %s\", err.Error())\n151\t\t\t\t\t\t} else {\n152\t\t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> done: %d checkpoint files created\", n)\n153\t\t\t\t\t\t\tlastCheckpointMu.Lock()\n154\t\t\t\t\t\t\tlastCheckpoint = now\n155\t\t\t\t\t\t\tlastCheckpointMu.Unlock()\n156\t\t\t\t\t\t}\n157\t\t\t\t\t}\n158\t\t\t\t}\n159\t\t\t}\n160\t\t})\n161\t}\n162\t\n163\t// MarshalJSON provides optimized JSON encoding for CheckpointMetrics.\n164\t//\n165\t// Since schema.Float has custom MarshalJSON, serializing []Float has significant overhead.\n166\t// This method manually constructs JSON to avoid allocations and interface conversions.\n167\tfunc (cm *CheckpointMetrics) MarshalJSON() ([]byte, error) {\n168\t\tbuf := make([]byte, 0, 128+len(cm.Data)*8)\n169\t\tbuf = append(buf, `{\"frequency\":`...)\n170\t\tbuf = strconv.AppendInt(buf, cm.Frequency, 10)\n171\t\tbuf = append(buf, `,\"start\":`...)\n172\t\tbuf = strconv.AppendInt(buf, cm.Start, 10)\n173\t\tbuf = append(buf, `,\"data\":[`...)\n174\t\tfor i, x := range cm.Data {\n175\t\t\tif i != 0 {\n176\t\t\t\tbuf = append(buf, ',')\n177\t\t\t}\n178\t\t\tif x.IsNaN() {\n179\t\t\t\tbuf = append(buf, `null`...)\n180\t\t\t} else {\n181\t\t\t\tbuf = strconv.AppendFloat(buf, float64(x), 'f', 1, 32)\n182\t\t\t}\n183\t\t}\n184\t\tbuf = append(buf, `]}`...)\n185\t\treturn buf, nil\n186\t}\n187\t\n188\t// ToCheckpoint writes metric data to checkpoint files in parallel (JSON format).\n189\t//\n190\t// Metrics at root and cluster levels are skipped. One file per host is created.\n191\t// Uses worker pool (Keys.NumWorkers) for parallel processing. Only locks one host\n192\t// at a time, allowing concurrent writes/reads to other hosts.\n193\t//\n194\t// Returns the number of checkpoint files created and any errors encountered.\n195\tfunc (m *MemoryStore) ToCheckpoint(dir string, from, to int64) (int, error) {\n196\t\t// Pre-calculate capacity by counting cluster/host pairs\n197\t\tm.root.lock.RLock()\n198\t\ttotalHosts := 0\n199\t\tfor _, l1 := range m.root.children {\n200\t\t\tl1.lock.RLock()\n201\t\t\ttotalHosts += len(l1.children)\n202\t\t\tl1.lock.RUnlock()\n203\t\t}\n204\t\tm.root.lock.RUnlock()\n205\t\n206\t\tlevels := make([]*Level, 0, totalHosts)\n207\t\tselectors := make([][]string, 0, totalHosts)\n208\t\n209\t\tm.root.lock.RLock()\n210\t\tfor sel1, l1 := range m.root.children {\n211\t\t\tl1.lock.RLock()\n212\t\t\tfor sel2, l2 := range l1.children {\n213\t\t\t\tlevels = append(levels, l2)\n214\t\t\t\tselectors = append(selectors, []string{sel1, sel2})\n215\t\t\t}\n216\t\t\tl1.lock.RUnlock()\n217\t\t}\n218\t\tm.root.lock.RUnlock()\n219\t\n220\t\ttype workItem struct {\n221\t\t\tlevel    *Level\n222\t\t\tdir      string\n223\t\t\tselector []string\n224\t\t}\n225\t\n226\t\tn, errs := int32(0), int32(0)\n227\t\n228\t\tvar wg sync.WaitGroup\n229\t\twg.Add(Keys.NumWorkers)\n230\t\twork := make(chan workItem, Keys.NumWorkers*2)\n231\t\tfor worker := 0; worker < Keys.NumWorkers; worker++ {\n232\t\t\tgo func() {\n233\t\t\t\tdefer wg.Done()\n234\t\n235\t\t\t\tfor workItem := range work {\n236\t\t\t\t\tif err := workItem.level.toCheckpoint(workItem.dir, from, to, m); err != nil {\n237\t\t\t\t\t\tif err == ErrNoNewArchiveData {\n238\t\t\t\t\t\t\tcontinue\n239\t\t\t\t\t\t}\n240\t\n241\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> error while checkpointing %#v: %s\", workItem.selector, err.Error())\n242\t\t\t\t\t\tatomic.AddInt32(&errs, 1)\n243\t\t\t\t\t} else {\n244\t\t\t\t\t\tatomic.AddInt32(&n, 1)\n245\t\t\t\t\t}\n246\t\t\t\t}\n247\t\t\t}()\n248\t\t}\n249\t\n250\t\tfor i := 0; i < len(levels); i++ {\n251\t\t\tdir := path.Join(dir, path.Join(selectors[i]...))\n252\t\t\twork <- workItem{\n253\t\t\t\tlevel:    levels[i],\n254\t\t\t\tdir:      dir,\n255\t\t\t\tselector: selectors[i],\n256\t\t\t}\n257\t\t}\n258\t\n259\t\tclose(work)\n260\t\twg.Wait()\n261\t\n262\t\tif errs > 0 {\n263\t\t\treturn int(n), fmt.Errorf(\"[METRICSTORE]> %d errors happened while creating checkpoints (%d successes)\", errs, n)\n264\t\t}\n265\t\treturn int(n), nil\n266\t}\n267\t\n268\t// toCheckpointFile recursively converts a Level tree to CheckpointFile structure.\n269\t// Skips metrics that are already archived. Returns nil if no unarchived data exists.\n270\tfunc (l *Level) toCheckpointFile(from, to int64, m *MemoryStore) (*CheckpointFile, error) {\n271\t\tl.lock.RLock()\n272\t\tdefer l.lock.RUnlock()\n273\t\n274\t\tretval := &CheckpointFile{\n275\t\t\tFrom:     from,\n276\t\t\tTo:       to,\n277\t\t\tMetrics:  make(map[string]*CheckpointMetrics),\n278\t\t\tChildren: make(map[string]*CheckpointFile),\n279\t\t}\n280\t\n281\t\tfor metric, minfo := range m.Metrics {\n282\t\t\tb := l.metrics[minfo.offset]\n283\t\t\tif b == nil {\n284\t\t\t\tcontinue\n285\t\t\t}\n286\t\n287\t\t\tallArchived := true\n288\t\t\tb.iterFromTo(from, to, func(b *buffer) error {\n289\t\t\t\tif !b.archived {\n290\t\t\t\t\tallArchived = false\n291\t\t\t\t\treturn fmt.Errorf(\"stop\") // Early termination signal\n292\t\t\t\t}\n293\t\t\t\treturn nil\n294\t\t\t})\n295\t\n296\t\t\tif allArchived {\n297\t\t\t\tcontinue\n298\t\t\t}\n299\t\n300\t\t\tdata := make([]schema.Float, (to-from)/b.frequency+1)\n301\t\t\tdata, start, end, err := b.read(from, to, data)\n302\t\t\tif err != nil {\n303\t\t\t\treturn nil, err\n304\t\t\t}\n305\t\n306\t\t\tfor i := int((end - start) / b.frequency); i < len(data); i++ {\n307\t\t\t\tdata[i] = schema.NaN\n308\t\t\t}\n309\t\n310\t\t\tretval.Metrics[metric] = &CheckpointMetrics{\n311\t\t\t\tFrequency: b.frequency,\n312\t\t\t\tStart:     start,\n313\t\t\t\tData:      data,\n314\t\t\t}\n315\t\t}\n316\t\n317\t\tfor name, child := range l.children {\n318\t\t\tval, err := child.toCheckpointFile(from, to, m)\n319\t\t\tif err != nil {\n320\t\t\t\treturn nil, err\n321\t\t\t}\n322\t\n323\t\t\tif val != nil {\n324\t\t\t\tretval.Children[name] = val\n325\t\t\t}\n326\t\t}\n327\t\n328\t\tif len(retval.Children) == 0 && len(retval.Metrics) == 0 {\n329\t\t\treturn nil, nil\n330\t\t}\n331\t\n332\t\treturn retval, nil\n333\t}\n334\t\n335\t// toCheckpoint writes a Level's data to a JSON checkpoint file.\n336\t// Creates directory if needed. Returns ErrNoNewArchiveData if nothing to save.\n337\tfunc (l *Level) toCheckpoint(dir string, from, to int64, m *MemoryStore) error {\n338\t\tcf, err := l.toCheckpointFile(from, to, m)\n339\t\tif err != nil {\n340\t\t\treturn err\n341\t\t}\n342\t\n343\t\tif cf == nil {\n344\t\t\treturn ErrNoNewArchiveData\n345\t\t}\n346\t\n347\t\tfilepath := path.Join(dir, fmt.Sprintf(\"%d.json\", from))\n348\t\tf, err := os.OpenFile(filepath, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, CheckpointFilePerms)\n349\t\tif err != nil && os.IsNotExist(err) {\n350\t\t\terr = os.MkdirAll(dir, CheckpointDirPerms)\n351\t\t\tif err == nil {\n352\t\t\t\tf, err = os.OpenFile(filepath, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, CheckpointFilePerms)\n353\t\t\t}\n354\t\t}\n355\t\tif err != nil {\n356\t\t\treturn err\n357\t\t}\n358\t\tdefer f.Close()\n359\t\n360\t\tbw := bufio.NewWriter(f)\n361\t\tif err = json.NewEncoder(bw).Encode(cf); err != nil {\n362\t\t\treturn err\n363\t\t}\n364\t\n365\t\treturn bw.Flush()\n366\t}\n367\t\n368\t// enqueueCheckpointHosts traverses checkpoint directory and enqueues cluster/host pairs.\n369\t// Returns error if directory structure is invalid.\n370\tfunc enqueueCheckpointHosts(dir string, work chan<- [2]string) error {\n371\t\tclustersDir, err := os.ReadDir(dir)\n372\t\tif err != nil {\n373\t\t\treturn err\n374\t\t}\n375\t\n376\t\tfor _, clusterDir := range clustersDir {\n377\t\t\tif !clusterDir.IsDir() {\n378\t\t\t\treturn errors.New(\"[METRICSTORE]> expected only directories at first level of checkpoints/ directory\")\n379\t\t\t}\n380\t\n381\t\t\thostsDir, err := os.ReadDir(filepath.Join(dir, clusterDir.Name()))\n382\t\t\tif err != nil {\n383\t\t\t\treturn err\n384\t\t\t}\n385\t\n386\t\t\tfor _, hostDir := range hostsDir {\n387\t\t\t\tif !hostDir.IsDir() {\n388\t\t\t\t\treturn errors.New(\"[METRICSTORE]> expected only directories at second level of checkpoints/ directory\")\n389\t\t\t\t}\n390\t\n391\t\t\t\twork <- [2]string{clusterDir.Name(), hostDir.Name()}\n392\t\t\t}\n393\t\t}\n394\t\n395\t\treturn nil\n396\t}\n397\t\n398\t// FromCheckpoint loads checkpoint files from disk into memory in parallel.\n399\t//\n400\t// Uses worker pool to load cluster/host combinations. Returns number of files\n401\t// loaded and any errors.\n402\tfunc (m *MemoryStore) FromCheckpoint(dir string, from int64) (int, error) {\n403\t\tvar wg sync.WaitGroup\n404\t\twork := make(chan [2]string, Keys.NumWorkers*4)\n405\t\tn, errs := int32(0), int32(0)\n406\t\n407\t\twg.Add(Keys.NumWorkers)\n408\t\tfor worker := 0; worker < Keys.NumWorkers; worker++ {\n409\t\t\tgo func() {\n410\t\t\t\tdefer wg.Done()\n411\t\t\t\tfor host := range work {\n412\t\t\t\t\tlvl := m.root.findLevelOrCreate(host[:], len(m.Metrics))\n413\t\t\t\t\tnn, err := lvl.fromCheckpoint(m, filepath.Join(dir, host[0], host[1]), from)\n414\t\t\t\t\tif err != nil {\n415\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> error while loading checkpoints for %s/%s: %s\", host[0], host[1], err.Error())\n416\t\t\t\t\t\tatomic.AddInt32(&errs, 1)\n417\t\t\t\t\t}\n418\t\t\t\t\tatomic.AddInt32(&n, int32(nn))\n419\t\t\t\t}\n420\t\t\t}()\n421\t\t}\n422\t\n423\t\terr := enqueueCheckpointHosts(dir, work)\n424\t\tclose(work)\n425\t\twg.Wait()\n426\t\n427\t\tif err != nil {\n428\t\t\treturn int(n), err\n429\t\t}\n430\t\n431\t\tif errs > 0 {\n432\t\t\treturn int(n), fmt.Errorf(\"[METRICSTORE]> %d errors happened while creating checkpoints (%d successes)\", errs, n)\n433\t\t}\n434\t\treturn int(n), nil\n435\t}\n436\t\n437\t// FromCheckpointFiles is the main entry point for loading checkpoints at startup.\n438\t//\n439\t// Creates checkpoint directory if it doesn't exist. This function must be called\n440\t// before any writes or reads, and can only be called once.\n441\tfunc (m *MemoryStore) FromCheckpointFiles(dir string, from int64) (int, error) {\n442\t\tif _, err := os.Stat(dir); os.IsNotExist(err) {\n443\t\t\terr := os.MkdirAll(dir, CheckpointDirPerms)\n444\t\t\tif err != nil {\n445\t\t\t\tcclog.Fatalf(\"[METRICSTORE]> Error creating directory: %#v\\n\", err)\n446\t\t\t}\n447\t\t\tcclog.Debugf(\"[METRICSTORE]> %#v Directory created successfully\", dir)\n448\t\t}\n449\t\n450\t\treturn m.FromCheckpoint(dir, from)\n451\t}\n452\t\n453\tfunc (l *Level) loadJSONFile(m *MemoryStore, f *os.File, from int64) error {\n454\t\tbr := bufio.NewReader(f)\n455\t\tcf := &CheckpointFile{}\n456\t\tif err := json.NewDecoder(br).Decode(cf); err != nil {\n457\t\t\treturn err\n458\t\t}\n459\t\n460\t\tif cf.To != 0 && cf.To < from {\n461\t\t\treturn nil\n462\t\t}\n463\t\n464\t\tif err := l.loadFile(cf, m); err != nil {\n465\t\t\treturn err\n466\t\t}\n467\t\n468\t\treturn nil\n469\t}\n470\t\n471\tfunc (l *Level) loadFile(cf *CheckpointFile, m *MemoryStore) error {\n472\t\tfor name, metric := range cf.Metrics {\n473\t\t\tn := len(metric.Data)\n474\t\t\tb := &buffer{\n475\t\t\t\tfrequency: metric.Frequency,\n476\t\t\t\tstart:     metric.Start,\n477\t\t\t\tdata:      metric.Data[0:n:n],\n478\t\t\t\tprev:      nil,\n479\t\t\t\tnext:      nil,\n480\t\t\t\tarchived:  true,\n481\t\t\t}\n482\t\n483\t\t\tminfo, ok := m.Metrics[name]\n484\t\t\tif !ok {\n485\t\t\t\tcontinue\n486\t\t\t}\n487\t\n488\t\t\tprev := l.metrics[minfo.offset]\n489\t\t\tif prev == nil {\n490\t\t\t\tl.metrics[minfo.offset] = b\n491\t\t\t} else {\n492\t\t\t\tif prev.start > b.start {\n493\t\t\t\t\treturn fmt.Errorf(\"[METRICSTORE]> buffer start time %d is before previous buffer start %d\", b.start, prev.start)\n494\t\t\t\t}\n495\t\n496\t\t\t\tb.prev = prev\n497\t\t\t\tprev.next = b\n498\t\t\t}\n499\t\t\tl.metrics[minfo.offset] = b\n500\t\t}\n501\t\n502\t\tif len(cf.Children) > 0 && l.children == nil {\n503\t\t\tl.children = make(map[string]*Level)\n504\t\t}\n505\t\n506\t\tfor sel, childCf := range cf.Children {\n507\t\t\tchild, ok := l.children[sel]\n508\t\t\tif !ok {\n509\t\t\t\tchild = &Level{\n510\t\t\t\t\tmetrics:  make([]*buffer, len(m.Metrics)),\n511\t\t\t\t\tchildren: nil,\n512\t\t\t\t}\n513\t\t\t\tl.children[sel] = child\n514\t\t\t}\n515\t\n516\t\t\tif err := child.loadFile(childCf, m); err != nil {\n517\t\t\t\treturn err\n518\t\t\t}\n519\t\t}\n520\t\n521\t\treturn nil\n522\t}\n523\t\n524\t// fromCheckpoint loads all checkpoint files (JSON, binary snapshot, WAL) for a\n525\t// single host directory. Snapshot files are loaded first (sorted by timestamp),\n526\t// then current.wal is replayed on top.\n527\tfunc (l *Level) fromCheckpoint(m *MemoryStore, dir string, from int64) (int, error) {\n528\t\tdirentries, err := os.ReadDir(dir)\n529\t\tif err != nil {\n530\t\t\tif os.IsNotExist(err) {\n531\t\t\t\treturn 0, nil\n532\t\t\t}\n533\t\t\treturn 0, err\n534\t\t}\n535\t\n536\t\tallFiles := make([]fs.DirEntry, 0)\n537\t\tvar walEntry fs.DirEntry\n538\t\tfilesLoaded := 0\n539\t\n540\t\tfor _, e := range direntries {\n541\t\t\tif e.IsDir() {\n542\t\t\t\t// Legacy: skip subdirectories (only used by old Avro format).\n543\t\t\t\t// These are ignored; their data is not loaded.\n544\t\t\t\tcclog.Debugf(\"[METRICSTORE]> skipping subdirectory %s in checkpoint dir %s\", e.Name(), dir)\n545\t\t\t\tcontinue\n546\t\t\t}\n547\t\n548\t\t\tname := e.Name()\n549\t\t\tif strings.HasSuffix(name, \".json\") || strings.HasSuffix(name, \".bin\") {\n550\t\t\t\tallFiles = append(allFiles, e)\n551\t\t\t} else if name == \"current.wal\" {\n552\t\t\t\twalEntry = e\n553\t\t\t}\n554\t\t\t// Silently ignore other files (e.g., .tmp, .bin.tmp from interrupted writes).\n555\t\t}\n556\t\n557\t\tfiles, err := findFiles(allFiles, from, true)\n558\t\tif err != nil {\n559\t\t\treturn filesLoaded, err\n560\t\t}\n561\t\n562\t\tloaders := map[string]func(*MemoryStore, *os.File, int64) error{\n563\t\t\t\".json\": l.loadJSONFile,\n564\t\t\t\".bin\":  l.loadBinaryFile,\n565\t\t}\n566\t\n567\t\tfor _, filename := range files {\n568\t\t\text := filepath.Ext(filename)\n569\t\t\tloader := loaders[ext]\n570\t\t\tif loader == nil {\n571\t\t\t\tcclog.Warnf(\"[METRICSTORE]> unknown extension for checkpoint file %s\", filename)\n572\t\t\t\tcontinue\n573\t\t\t}\n574\t\n575\t\t\terr := func() error {\n576\t\t\t\tf, err := os.Open(path.Join(dir, filename))\n577\t\t\t\tif err != nil {\n578\t\t\t\t\treturn err\n579\t\t\t\t}\n580\t\t\t\tdefer f.Close()\n581\t\t\t\treturn loader(m, f, from)\n582\t\t\t}()\n583\t\t\tif err != nil {\n584\t\t\t\treturn filesLoaded, err\n585\t\t\t}\n586\t\t\tfilesLoaded++\n587\t\t}\n588\t\n589\t\t// Replay WAL after all snapshot files so it fills in data since the last snapshot.\n590\t\tif walEntry != nil {\n591\t\t\terr := func() error {\n592\t\t\t\tf, err := os.Open(path.Join(dir, walEntry.Name()))\n593\t\t\t\tif err != nil {\n594\t\t\t\t\treturn err\n595\t\t\t\t}\n596\t\t\t\tdefer f.Close()\n597\t\t\t\treturn l.loadWALFile(m, f, from)\n598\t\t\t}()\n599\t\t\tif err != nil {\n600\t\t\t\t// WAL errors are non-fatal: the snapshot already loaded the bulk of data.\n601\t\t\t\tcclog.Warnf(\"[METRICSTORE]> WAL replay error for %s: %v (data since last snapshot may be missing)\", dir, err)\n602\t\t\t} else {\n603\t\t\t\tfilesLoaded++\n604\t\t\t}\n605\t\t}\n606\t\n607\t\treturn filesLoaded, nil\n608\t}\n609\t\n610\t// parseTimestampFromFilename extracts a Unix timestamp from a checkpoint filename.\n611\t// Supports \".json\" (format: \"<ts>.json\") and \".bin\" (format: \"<ts>.bin\").\n612\tfunc parseTimestampFromFilename(name string) (int64, error) {\n613\t\tswitch {\n614\t\tcase strings.HasSuffix(name, \".json\"):\n615\t\t\treturn strconv.ParseInt(name[:len(name)-5], 10, 64)\n616\t\tcase strings.HasSuffix(name, \".bin\"):\n617\t\t\treturn strconv.ParseInt(name[:len(name)-4], 10, 64)\n618\t\tdefault:\n619\t\t\treturn 0, fmt.Errorf(\"unknown checkpoint extension for file %q\", name)\n620\t\t}\n621\t}\n622\t\n623\t// findFiles returns filenames from direntries whose timestamps satisfy the filter.\n624\t// If findMoreRecentFiles is true, returns files with timestamps >= t (plus the\n625\t// last file before t if t falls between two files).\n626\tfunc findFiles(direntries []fs.DirEntry, t int64, findMoreRecentFiles bool) ([]string, error) {\n627\t\tnums := map[string]int64{}\n628\t\tfor _, e := range direntries {\n629\t\t\tname := e.Name()\n630\t\t\tif !strings.HasSuffix(name, \".json\") && !strings.HasSuffix(name, \".bin\") {\n631\t\t\t\tcontinue\n632\t\t\t}\n633\t\n634\t\t\tts, err := parseTimestampFromFilename(name)\n635\t\t\tif err != nil {\n636\t\t\t\treturn nil, err\n637\t\t\t}\n638\t\t\tnums[name] = ts\n639\t\t}\n640\t\n641\t\tsort.Slice(direntries, func(i, j int) bool {\n642\t\t\ta, b := direntries[i], direntries[j]\n643\t\t\treturn nums[a.Name()] < nums[b.Name()]\n644\t\t})\n645\t\n646\t\tif len(nums) == 0 {\n647\t\t\treturn nil, nil\n648\t\t}\n649\t\n650\t\tfilenames := make([]string, 0)\n651\t\n652\t\tfor i, e := range direntries {\n653\t\t\tts1 := nums[e.Name()]\n654\t\n655\t\t\tif findMoreRecentFiles && t <= ts1 {\n656\t\t\t\tfilenames = append(filenames, e.Name())\n657\t\t\t} else if !findMoreRecentFiles && ts1 <= t && ts1 != 0 {\n658\t\t\t\tfilenames = append(filenames, e.Name())\n659\t\t\t}\n660\t\n661\t\t\tif i == len(direntries)-1 {\n662\t\t\t\tcontinue\n663\t\t\t}\n664\t\n665\t\t\tenext := direntries[i+1]\n666\t\t\tts2 := nums[enext.Name()]\n667\t\n668\t\t\tif findMoreRecentFiles {\n669\t\t\t\tif ts1 < t && t < ts2 {\n670\t\t\t\t\tfilenames = append(filenames, e.Name())\n671\t\t\t\t}\n672\t\t\t}\n673\t\t}\n674\t\n675\t\treturn filenames, nil\n676\t}\n677\t"}]},"uuid":"f7e2d65e-5998-418b-9d7b-62d1567c2ae4","timestamp":"2026-06-05T06:32:31.910Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/checkpoint.go","content":"// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n// All rights reserved. This file is part of cc-backend.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\n// This file implements checkpoint persistence for the in-memory metric store.\n//\n// Checkpoints enable graceful restarts by periodically saving in-memory metric\n// data to disk in JSON or binary format. The checkpoint system:\n//\n// Key Features:\n//   - Periodic background checkpointing via the Checkpointing() worker\n//   - Two format families: JSON (human-readable) and WAL+binary (compact, crash-safe)\n//   - Parallel checkpoint creation and loading using worker pools\n//   - Hierarchical file organization: checkpoint_dir/cluster/host/timestamp.{json|bin}\n//   - WAL file: checkpoint_dir/cluster/host/current.wal (append-only, per-entry)\n//   - Only saves unarchived data (archived data is already persisted elsewhere)\n//   - GC optimization during loading to prevent excessive heap growth\n//\n// Checkpoint Workflow:\n//  1. Init() loads checkpoints within retention window at startup\n//  2. Checkpointing() worker periodically saves new data\n//  3. Shutdown() writes final checkpoint before exit\n//\n// File Organization:\n//\n//\tcheckpoints/\n//\t  cluster1/\n//\t    host001/\n//\t      1234567890.json  (JSON format: full subtree snapshot)\n//\t      1234567890.bin   (binary format: full subtree snapshot)\n//\t      current.wal      (WAL format: append-only per-entry log)\n//\t    host002/\n//\t      ...\npackage metricstore\n\nimport (\n\t\"bufio\"\n\t\"context\"\n\t\"encoding/json\"\n\t\"errors\"\n\t\"fmt\"\n\t\"io/fs\"\n\t\"os\"\n\t\"path\"\n\t\"path/filepath\"\n\t\"sort\"\n\t\"strconv\"\n\t\"strings\"\n\t\"sync\"\n\t\"sync/atomic\"\n\t\"time\"\n\n\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n)\n\nconst (\n\tCheckpointFilePerms = 0o644                    // File permissions for checkpoint files\n\tCheckpointDirPerms  = 0o755                    // Directory permissions for checkpoint directories\n\tGCTriggerInterval   = DefaultGCTriggerInterval // Interval for triggering GC during checkpoint loading\n)\n\n// CheckpointMetrics represents metric data in a checkpoint file.\n// Whenever the structure changes, update MarshalJSON as well!\ntype CheckpointMetrics struct {\n\tData      []schema.Float `json:\"data\"`\n\tFrequency int64          `json:\"frequency\"`\n\tStart     int64          `json:\"start\"`\n}\n\n// CheckpointFile represents the hierarchical structure of a checkpoint file.\n// It mirrors the Level tree structure from the MemoryStore.\ntype CheckpointFile struct {\n\tMetrics  map[string]*CheckpointMetrics `json:\"metrics\"`\n\tChildren map[string]*CheckpointFile    `json:\"children\"`\n\tFrom     int64                         `json:\"from\"`\n\tTo       int64                         `json:\"to\"`\n}\n\n// lastCheckpoint tracks the timestamp of the last checkpoint creation.\nvar (\n\tlastCheckpoint   time.Time\n\tlastCheckpointMu sync.Mutex\n)\n\n// Checkpointing starts a background worker that periodically saves metric data to disk.\n//\n// The checkpoint interval is read from Keys.CheckpointInterval (default: 12 hours).\n//\n// Format behaviour:\n//   - \"json\": Writes a JSON snapshot file per host every interval\n//   - \"wal\":  Writes a binary snapshot file per host every interval, then rotates\n//     the current.wal files for all successfully checkpointed hosts\nfunc Checkpointing(wg *sync.WaitGroup, ctx context.Context) {\n\tlastCheckpointMu.Lock()\n\tlastCheckpoint = time.Now()\n\tlastCheckpointMu.Unlock()\n\n\tms := GetMemoryStore()\n\n\twg.Go(func() {\n\t\td := 12 * time.Hour // default checkpoint interval\n\t\tif Keys.CheckpointInterval != \"\" {\n\t\t\tparsed, err := time.ParseDuration(Keys.CheckpointInterval)\n\t\t\tif err != nil {\n\t\t\t\tcclog.Errorf(\"[METRICSTORE]> invalid checkpoint-interval %q: %s, using default 12h\", Keys.CheckpointInterval, err)\n\t\t\t} else {\n\t\t\t\td = parsed\n\t\t\t}\n\t\t}\n\n\t\tticker := time.NewTicker(d)\n\t\tdefer ticker.Stop()\n\n\t\tfor {\n\t\t\tselect {\n\t\t\tcase <-ctx.Done():\n\t\t\t\treturn\n\t\t\tcase <-ticker.C:\n\t\t\t\tlastCheckpointMu.Lock()\n\t\t\t\tfrom := lastCheckpoint\n\t\t\t\tlastCheckpointMu.Unlock()\n\n\t\t\t\tnow := time.Now()\n\t\t\t\tcclog.Infof(\"[METRICSTORE]> start checkpointing (starting at %s)...\", from.Format(time.RFC3339))\n\n\t\t\t\tif Keys.Checkpoints.FileFormat == \"wal\" {\n\t\t\t\t\t// Pause WAL writes: the binary snapshot captures all in-memory\n\t\t\t\t\t// data, so WAL records written during checkpoint are redundant\n\t\t\t\t\t// and would be deleted during rotation anyway.\n\t\t\t\t\twalCheckpointActive.Store(true)\n\t\t\t\t\tn, hostDirs, err := ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), now.Unix())\n\t\t\t\t\tif err != nil {\n\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> binary checkpointing failed: %s\", err.Error())\n\t\t\t\t\t}\n\t\t\t\t\tif n > 0 {\n\t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> done: %d binary snapshot files created\", n)\n\t\t\t\t\t\tlastCheckpointMu.Lock()\n\t\t\t\t\t\tlastCheckpoint = now\n\t\t\t\t\t\tlastCheckpointMu.Unlock()\n\t\t\t\t\t\t// Rotate WAL files for successfully checkpointed hosts.\n\t\t\t\t\t\tRotateWALFiles(hostDirs)\n\t\t\t\t\t}\n\t\t\t\t\twalCheckpointActive.Store(false)\n\t\t\t\t\twalDropped.Store(0)\n\t\t\t\t} else {\n\t\t\t\t\tn, err := ms.ToCheckpoint(Keys.Checkpoints.RootDir, from.Unix(), now.Unix())\n\t\t\t\t\tif err != nil {\n\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> checkpointing failed: %s\", err.Error())\n\t\t\t\t\t} else {\n\t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> done: %d checkpoint files created\", n)\n\t\t\t\t\t\tlastCheckpointMu.Lock()\n\t\t\t\t\t\tlastCheckpoint = now\n\t\t\t\t\t\tlastCheckpointMu.Unlock()\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t})\n}\n\n// MarshalJSON provides optimized JSON encoding for CheckpointMetrics.\n//\n// Since schema.Float has custom MarshalJSON, serializing []Float has significant overhead.\n// This method manually constructs JSON to avoid allocations and interface conversions.\nfunc (cm *CheckpointMetrics) MarshalJSON() ([]byte, error) {\n\tbuf := make([]byte, 0, 128+len(cm.Data)*8)\n\tbuf = append(buf, `{\"frequency\":`...)\n\tbuf = strconv.AppendInt(buf, cm.Frequency, 10)\n\tbuf = append(buf, `,\"start\":`...)\n\tbuf = strconv.AppendInt(buf, cm.Start, 10)\n\tbuf = append(buf, `,\"data\":[`...)\n\tfor i, x := range cm.Data {\n\t\tif i != 0 {\n\t\t\tbuf = append(buf, ',')\n\t\t}\n\t\tif x.IsNaN() {\n\t\t\tbuf = append(buf, `null`...)\n\t\t} else {\n\t\t\tbuf = strconv.AppendFloat(buf, float64(x), 'f', 1, 32)\n\t\t}\n\t}\n\tbuf = append(buf, `]}`...)\n\treturn buf, nil\n}\n\n// ToCheckpoint writes metric data to checkpoint files in parallel (JSON format).\n//\n// Metrics at root and cluster levels are skipped. One file per host is created.\n// Uses worker pool (Keys.NumWorkers) for parallel processing. Only locks one host\n// at a time, allowing concurrent writes/reads to other hosts.\n//\n// Returns the number of checkpoint files created and any errors encountered.\nfunc (m *MemoryStore) ToCheckpoint(dir string, from, to int64) (int, error) {\n\t// Pre-calculate capacity by counting cluster/host pairs\n\tm.root.lock.RLock()\n\ttotalHosts := 0\n\tfor _, l1 := range m.root.children {\n\t\tl1.lock.RLock()\n\t\ttotalHosts += len(l1.children)\n\t\tl1.lock.RUnlock()\n\t}\n\tm.root.lock.RUnlock()\n\n\tlevels := make([]*Level, 0, totalHosts)\n\tselectors := make([][]string, 0, totalHosts)\n\n\tm.root.lock.RLock()\n\tfor sel1, l1 := range m.root.children {\n\t\tl1.lock.RLock()\n\t\tfor sel2, l2 := range l1.children {\n\t\t\tlevels = append(levels, l2)\n\t\t\tselectors = append(selectors, []string{sel1, sel2})\n\t\t}\n\t\tl1.lock.RUnlock()\n\t}\n\tm.root.lock.RUnlock()\n\n\ttype workItem struct {\n\t\tlevel    *Level\n\t\tdir      string\n\t\tselector []string\n\t}\n\n\tn, errs := int32(0), int32(0)\n\n\tvar wg sync.WaitGroup\n\twg.Add(Keys.NumWorkers)\n\twork := make(chan workItem, Keys.NumWorkers*2)\n\tfor worker := 0; worker < Keys.NumWorkers; worker++ {\n\t\tgo func() {\n\t\t\tdefer wg.Done()\n\n\t\t\tfor workItem := range work {\n\t\t\t\tif err := workItem.level.toCheckpoint(workItem.dir, from, to, m); err != nil {\n\t\t\t\t\tif err == ErrNoNewArchiveData {\n\t\t\t\t\t\tcontinue\n\t\t\t\t\t}\n\n\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> error while checkpointing %#v: %s\", workItem.selector, err.Error())\n\t\t\t\t\tatomic.AddInt32(&errs, 1)\n\t\t\t\t} else {\n\t\t\t\t\tatomic.AddInt32(&n, 1)\n\t\t\t\t}\n\t\t\t}\n\t\t}()\n\t}\n\n\tfor i := 0; i < len(levels); i++ {\n\t\tdir := path.Join(dir, path.Join(selectors[i]...))\n\t\twork <- workItem{\n\t\t\tlevel:    levels[i],\n\t\t\tdir:      dir,\n\t\t\tselector: selectors[i],\n\t\t}\n\t}\n\n\tclose(work)\n\twg.Wait()\n\n\tif errs > 0 {\n\t\treturn int(n), fmt.Errorf(\"[METRICSTORE]> %d errors happened while creating checkpoints (%d successes)\", errs, n)\n\t}\n\treturn int(n), nil\n}\n\n// toCheckpointFile recursively converts a Level tree to CheckpointFile structure.\n// Skips metrics that are already archived. Returns nil if no unarchived data exists.\nfunc (l *Level) toCheckpointFile(from, to int64, m *MemoryStore) (*CheckpointFile, error) {\n\tl.lock.RLock()\n\tdefer l.lock.RUnlock()\n\n\tretval := &CheckpointFile{\n\t\tFrom:     from,\n\t\tTo:       to,\n\t\tMetrics:  make(map[string]*CheckpointMetrics),\n\t\tChildren: make(map[string]*CheckpointFile),\n\t}\n\n\tfor metric, minfo := range m.Metrics {\n\t\tb := l.metrics[minfo.offset]\n\t\tif b == nil {\n\t\t\tcontinue\n\t\t}\n\n\t\tallArchived := true\n\t\tb.iterFromTo(from, to, func(b *buffer) error {\n\t\t\tif !b.archived {\n\t\t\t\tallArchived = false\n\t\t\t\treturn fmt.Errorf(\"stop\") // Early termination signal\n\t\t\t}\n\t\t\treturn nil\n\t\t})\n\n\t\tif allArchived {\n\t\t\tcontinue\n\t\t}\n\n\t\tdata := make([]schema.Float, (to-from)/b.frequency+1)\n\t\tdata, start, end, err := b.read(from, to, data)\n\t\tif err != nil {\n\t\t\treturn nil, err\n\t\t}\n\n\t\tfor i := int((end - start) / b.frequency); i < len(data); i++ {\n\t\t\tdata[i] = schema.NaN\n\t\t}\n\n\t\tretval.Metrics[metric] = &CheckpointMetrics{\n\t\t\tFrequency: b.frequency,\n\t\t\tStart:     start,\n\t\t\tData:      data,\n\t\t}\n\t}\n\n\tfor name, child := range l.children {\n\t\tval, err := child.toCheckpointFile(from, to, m)\n\t\tif err != nil {\n\t\t\treturn nil, err\n\t\t}\n\n\t\tif val != nil {\n\t\t\tretval.Children[name] = val\n\t\t}\n\t}\n\n\tif len(retval.Children) == 0 && len(retval.Metrics) == 0 {\n\t\treturn nil, nil\n\t}\n\n\treturn retval, nil\n}\n\n// toCheckpoint writes a Level's data to a JSON checkpoint file.\n// Creates directory if needed. Returns ErrNoNewArchiveData if nothing to save.\nfunc (l *Level) toCheckpoint(dir string, from, to int64, m *MemoryStore) error {\n\tcf, err := l.toCheckpointFile(from, to, m)\n\tif err != nil {\n\t\treturn err\n\t}\n\n\tif cf == nil {\n\t\treturn ErrNoNewArchiveData\n\t}\n\n\tfilepath := path.Join(dir, fmt.Sprintf(\"%d.json\", from))\n\tf, err := os.OpenFile(filepath, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, CheckpointFilePerms)\n\tif err != nil && os.IsNotExist(err) {\n\t\terr = os.MkdirAll(dir, CheckpointDirPerms)\n\t\tif err == nil {\n\t\t\tf, err = os.OpenFile(filepath, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, CheckpointFilePerms)\n\t\t}\n\t}\n\tif err != nil {\n\t\treturn err\n\t}\n\tdefer f.Close()\n\n\tbw := bufio.NewWriter(f)\n\tif err = json.NewEncoder(bw).Encode(cf); err != nil {\n\t\treturn err\n\t}\n\n\treturn bw.Flush()\n}\n\n// enqueueCheckpointHosts traverses checkpoint directory and enqueues cluster/host pairs.\n// Returns error if directory structure is invalid.\nfunc enqueueCheckpointHosts(dir string, work chan<- [2]string) error {\n\tclustersDir, err := os.ReadDir(dir)\n\tif err != nil {\n\t\treturn err\n\t}\n\n\tfor _, clusterDir := range clustersDir {\n\t\tif !clusterDir.IsDir() {\n\t\t\treturn errors.New(\"[METRICSTORE]> expected only directories at first level of checkpoints/ directory\")\n\t\t}\n\n\t\thostsDir, err := os.ReadDir(filepath.Join(dir, clusterDir.Name()))\n\t\tif err != nil {\n\t\t\treturn err\n\t\t}\n\n\t\tfor _, hostDir := range hostsDir {\n\t\t\tif !hostDir.IsDir() {\n\t\t\t\treturn errors.New(\"[METRICSTORE]> expected only directories at second level of checkpoints/ directory\")\n\t\t\t}\n\n\t\t\twork <- [2]string{clusterDir.Name(), hostDir.Name()}\n\t\t}\n\t}\n\n\treturn nil\n}\n\n// FromCheckpoint loads checkpoint files from disk into memory in parallel.\n//\n// Uses worker pool to load cluster/host combinations. Returns number of files\n// loaded and any errors.\nfunc (m *MemoryStore) FromCheckpoint(dir string, from int64) (int, error) {\n\tvar wg sync.WaitGroup\n\twork := make(chan [2]string, Keys.NumWorkers*4)\n\tn, errs := int32(0), int32(0)\n\n\twg.Add(Keys.NumWorkers)\n\tfor worker := 0; worker < Keys.NumWorkers; worker++ {\n\t\tgo func() {\n\t\t\tdefer wg.Done()\n\t\t\tfor host := range work {\n\t\t\t\tlvl := m.root.findLevelOrCreate(host[:], len(m.Metrics))\n\t\t\t\tnn, err := lvl.fromCheckpoint(m, filepath.Join(dir, host[0], host[1]), from)\n\t\t\t\tif err != nil {\n\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> error while loading checkpoints for %s/%s: %s\", host[0], host[1], err.Error())\n\t\t\t\t\tatomic.AddInt32(&errs, 1)\n\t\t\t\t}\n\t\t\t\tatomic.AddInt32(&n, int32(nn))\n\t\t\t}\n\t\t}()\n\t}\n\n\terr := enqueueCheckpointHosts(dir, work)\n\tclose(work)\n\twg.Wait()\n\n\tif err != nil {\n\t\treturn int(n), err\n\t}\n\n\tif errs > 0 {\n\t\treturn int(n), fmt.Errorf(\"[METRICSTORE]> %d errors happened while creating checkpoints (%d successes)\", errs, n)\n\t}\n\treturn int(n), nil\n}\n\n// FromCheckpointFiles is the main entry point for loading checkpoints at startup.\n//\n// Creates checkpoint directory if it doesn't exist. This function must be called\n// before any writes or reads, and can only be called once.\nfunc (m *MemoryStore) FromCheckpointFiles(dir string, from int64) (int, error) {\n\tif _, err := os.Stat(dir); os.IsNotExist(err) {\n\t\terr := os.MkdirAll(dir, CheckpointDirPerms)\n\t\tif err != nil {\n\t\t\tcclog.Fatalf(\"[METRICSTORE]> Error creating directory: %#v\\n\", err)\n\t\t}\n\t\tcclog.Debugf(\"[METRICSTORE]> %#v Directory created successfully\", dir)\n\t}\n\n\treturn m.FromCheckpoint(dir, from)\n}\n\nfunc (l *Level) loadJSONFile(m *MemoryStore, f *os.File, from int64) error {\n\tbr := bufio.NewReader(f)\n\tcf := &CheckpointFile{}\n\tif err := json.NewDecoder(br).Decode(cf); err != nil {\n\t\treturn err\n\t}\n\n\tif cf.To != 0 && cf.To < from {\n\t\treturn nil\n\t}\n\n\tif err := l.loadFile(cf, m); err != nil {\n\t\treturn err\n\t}\n\n\treturn nil\n}\n\nfunc (l *Level) loadFile(cf *CheckpointFile, m *MemoryStore) error {\n\tfor name, metric := range cf.Metrics {\n\t\tn := len(metric.Data)\n\t\tb := &buffer{\n\t\t\tfrequency: metric.Frequency,\n\t\t\tstart:     metric.Start,\n\t\t\tdata:      metric.Data[0:n:n],\n\t\t\tprev:      nil,\n\t\t\tnext:      nil,\n\t\t\tarchived:  true,\n\t\t}\n\n\t\tminfo, ok := m.Metrics[name]\n\t\tif !ok {\n\t\t\tcontinue\n\t\t}\n\n\t\tprev := l.metrics[minfo.offset]\n\t\tif prev == nil {\n\t\t\tl.metrics[minfo.offset] = b\n\t\t} else {\n\t\t\tif prev.start > b.start {\n\t\t\t\treturn fmt.Errorf(\"[METRICSTORE]> buffer start time %d is before previous buffer start %d\", b.start, prev.start)\n\t\t\t}\n\n\t\t\tb.prev = prev\n\t\t\tprev.next = b\n\t\t}\n\t\tl.metrics[minfo.offset] = b\n\t}\n\n\tif len(cf.Children) > 0 && l.children == nil {\n\t\tl.children = make(map[string]*Level)\n\t}\n\n\tfor sel, childCf := range cf.Children {\n\t\tchild, ok := l.children[sel]\n\t\tif !ok {\n\t\t\tchild = &Level{\n\t\t\t\tmetrics:  make([]*buffer, len(m.Metrics)),\n\t\t\t\tchildren: nil,\n\t\t\t}\n\t\t\tl.children[sel] = child\n\t\t}\n\n\t\tif err := child.loadFile(childCf, m); err != nil {\n\t\t\treturn err\n\t\t}\n\t}\n\n\treturn nil\n}\n\n// fromCheckpoint loads all checkpoint files (JSON, binary snapshot, WAL) for a\n// single host directory. Snapshot files are loaded first (sorted by timestamp),\n// then current.wal is replayed on top.\nfunc (l *Level) fromCheckpoint(m *MemoryStore, dir string, from int64) (int, error) {\n\tdirentries, err := os.ReadDir(dir)\n\tif err != nil {\n\t\tif os.IsNotExist(err) {\n\t\t\treturn 0, nil\n\t\t}\n\t\treturn 0, err\n\t}\n\n\tallFiles := make([]fs.DirEntry, 0)\n\tvar walEntry fs.DirEntry\n\tfilesLoaded := 0\n\n\tfor _, e := range direntries {\n\t\tif e.IsDir() {\n\t\t\t// Legacy: skip subdirectories (only used by old Avro format).\n\t\t\t// These are ignored; their data is not loaded.\n\t\t\tcclog.Debugf(\"[METRICSTORE]> skipping subdirectory %s in checkpoint dir %s\", e.Name(), dir)\n\t\t\tcontinue\n\t\t}\n\n\t\tname := e.Name()\n\t\tif strings.HasSuffix(name, \".json\") || strings.HasSuffix(name, \".bin\") {\n\t\t\tallFiles = append(allFiles, e)\n\t\t} else if name == \"current.wal\" {\n\t\t\twalEntry = e\n\t\t}\n\t\t// Silently ignore other files (e.g., .tmp, .bin.tmp from interrupted writes).\n\t}\n\n\tfiles, err := findFiles(allFiles, from, true)\n\tif err != nil {\n\t\treturn filesLoaded, err\n\t}\n\n\tloaders := map[string]func(*MemoryStore, *os.File, int64) error{\n\t\t\".json\": l.loadJSONFile,\n\t\t\".bin\":  l.loadBinaryFile,\n\t}\n\n\tfor _, filename := range files {\n\t\text := filepath.Ext(filename)\n\t\tloader := loaders[ext]\n\t\tif loader == nil {\n\t\t\tcclog.Warnf(\"[METRICSTORE]> unknown extension for checkpoint file %s\", filename)\n\t\t\tcontinue\n\t\t}\n\n\t\terr := func() error {\n\t\t\tf, err := os.Open(path.Join(dir, filename))\n\t\t\tif err != nil {\n\t\t\t\treturn err\n\t\t\t}\n\t\t\tdefer f.Close()\n\t\t\treturn loader(m, f, from)\n\t\t}()\n\t\tif err != nil {\n\t\t\treturn filesLoaded, err\n\t\t}\n\t\tfilesLoaded++\n\t}\n\n\t// Replay WAL after all snapshot files so it fills in data since the last snapshot.\n\tif walEntry != nil {\n\t\terr := func() error {\n\t\t\tf, err := os.Open(path.Join(dir, walEntry.Name()))\n\t\t\tif err != nil {\n\t\t\t\treturn err\n\t\t\t}\n\t\t\tdefer f.Close()\n\t\t\treturn l.loadWALFile(m, f, from)\n\t\t}()\n\t\tif err != nil {\n\t\t\t// WAL errors are non-fatal: the snapshot already loaded the bulk of data.\n\t\t\tcclog.Warnf(\"[METRICSTORE]> WAL replay error for %s: %v (data since last snapshot may be missing)\", dir, err)\n\t\t} else {\n\t\t\tfilesLoaded++\n\t\t}\n\t}\n\n\treturn filesLoaded, nil\n}\n\n// parseTimestampFromFilename extracts a Unix timestamp from a checkpoint filename.\n// Supports \".json\" (format: \"<ts>.json\") and \".bin\" (format: \"<ts>.bin\").\nfunc parseTimestampFromFilename(name string) (int64, error) {\n\tswitch {\n\tcase strings.HasSuffix(name, \".json\"):\n\t\treturn strconv.ParseInt(name[:len(name)-5], 10, 64)\n\tcase strings.HasSuffix(name, \".bin\"):\n\t\treturn strconv.ParseInt(name[:len(name)-4], 10, 64)\n\tdefault:\n\t\treturn 0, fmt.Errorf(\"unknown checkpoint extension for file %q\", name)\n\t}\n}\n\n// findFiles returns filenames from direntries whose timestamps satisfy the filter.\n// If findMoreRecentFiles is true, returns files with timestamps >= t (plus the\n// last file before t if t falls between two files).\nfunc findFiles(direntries []fs.DirEntry, t int64, findMoreRecentFiles bool) ([]string, error) {\n\tnums := map[string]int64{}\n\tfor _, e := range direntries {\n\t\tname := e.Name()\n\t\tif !strings.HasSuffix(name, \".json\") && !strings.HasSuffix(name, \".bin\") {\n\t\t\tcontinue\n\t\t}\n\n\t\tts, err := parseTimestampFromFilename(name)\n\t\tif err != nil {\n\t\t\treturn nil, err\n\t\t}\n\t\tnums[name] = ts\n\t}\n\n\tsort.Slice(direntries, func(i, j int) bool {\n\t\ta, b := direntries[i], direntries[j]\n\t\treturn nums[a.Name()] < nums[b.Name()]\n\t})\n\n\tif len(nums) == 0 {\n\t\treturn nil, nil\n\t}\n\n\tfilenames := make([]string, 0)\n\n\tfor i, e := range direntries {\n\t\tts1 := nums[e.Name()]\n\n\t\tif findMoreRecentFiles && t <= ts1 {\n\t\t\tfilenames = append(filenames, e.Name())\n\t\t} else if !findMoreRecentFiles && ts1 <= t && ts1 != 0 {\n\t\t\tfilenames = append(filenames, e.Name())\n\t\t}\n\n\t\tif i == len(direntries)-1 {\n\t\t\tcontinue\n\t\t}\n\n\t\tenext := direntries[i+1]\n\t\tts2 := nums[enext.Name()]\n\n\t\tif findMoreRecentFiles {\n\t\t\tif ts1 < t && t < ts2 {\n\t\t\t\tfilenames = append(filenames, e.Name())\n\t\t\t}\n\t\t}\n\t}\n\n\treturn filenames, nil\n}\n","numLines":677,"startLine":1,"totalLines":677}},"sourceToolAssistantUUID":"6afe5f5f-c5bc-4a02-8adb-37d83aeb078b","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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+{"type":"ai-title","aiTitle":"Analyze WAL file reset mechanism in checkpoint system","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63"}
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+{"parentUuid":"3c6b71b5-d8b6-4661-9c49-083966474dee","isSidechain":false,"promptId":"bf1a2a8c-5f1a-4688-91c9-f9d2413ee03d","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_019atYppGJMYTsbWnJWBfvEV","type":"tool_result","content":"1\t// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n2\t// All rights reserved. This file is part of cc-backend.\n3\t// Use of this source code is governed by a MIT-style\n4\t// license that can be found in the LICENSE file.\n5\t\n6\t// Package metricstore provides walCheckpoint.go: WAL-based checkpoint implementation.\n7\t//\n8\t// This replaces the Avro shadow tree with an append-only Write-Ahead Log (WAL)\n9\t// per host, eliminating the extra memory overhead of the AvroStore and providing\n10\t// truly continuous (per-write) crash safety.\n11\t//\n12\t// # Architecture\n13\t//\n14\t//\tMetric write (DecodeLine)\n15\t//\t      │\n16\t//\t      ├─► WriteToLevel()    → main MemoryStore (unchanged)\n17\t//\t      │\n18\t//\t      └─► WALMessages channel\n19\t//\t               │\n20\t//\t               ▼\n21\t//\t        WALStaging goroutine\n22\t//\t               │\n23\t//\t               ▼\n24\t//\t        checkpoints/cluster/host/current.wal  (append-only, binary)\n25\t//\n26\t//\tPeriodic checkpoint (Checkpointing goroutine):\n27\t//\t  1. Write <timestamp>.bin snapshot (column-oriented, from main tree)\n28\t//\t  2. Signal WALStaging to truncate current.wal per host\n29\t//\n30\t//\tOn restart (FromCheckpoint):\n31\t//\t  1. Load most recent <timestamp>.bin snapshot\n32\t//\t  2. Replay current.wal (overwrite-safe: buffer.write handles duplicate timestamps)\n33\t//\n34\t// # WAL Record Format\n35\t//\n36\t//\t[4B magic 0xCC1DA7A1][4B payload_len][payload][4B CRC32]\n37\t//\n38\t//\tpayload:\n39\t//\t  [8B timestamp int64]\n40\t//\t  [2B metric_name_len uint16][N metric name bytes]\n41\t//\t  [1B selector_count uint8]\n42\t//\t  per selector: [1B selector_len uint8][M selector bytes]\n43\t//\t  [4B value float32 bits]\n44\t//\n45\t// # Binary Snapshot Format\n46\t//\n47\t//\t[4B magic 0xCC5B0001][8B from int64][8B to int64]\n48\t//\tLevel tree (recursive):\n49\t//\t  [4B num_metrics uint32]\n50\t//\t  per metric:\n51\t//\t    [2B name_len uint16][N name bytes]\n52\t//\t    [8B frequency int64][8B start int64]\n53\t//\t    [4B num_values uint32][num_values × 4B float32]\n54\t//\t  [4B num_children uint32]\n55\t//\t  per child: [2B name_len uint16][N name bytes] + Level (recursive)\n56\tpackage metricstore\n57\t\n58\timport (\n59\t\t\"bufio\"\n60\t\t\"context\"\n61\t\t\"encoding/binary\"\n62\t\t\"fmt\"\n63\t\t\"hash/crc32\"\n64\t\t\"hash/fnv\"\n65\t\t\"io\"\n66\t\t\"math\"\n67\t\t\"os\"\n68\t\t\"path\"\n69\t\t\"strings\"\n70\t\t\"sync\"\n71\t\t\"sync/atomic\"\n72\t\t\"time\"\n73\t\n74\t\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n75\t\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n76\t)\n77\t\n78\t// Magic numbers for binary formats.\n79\tconst (\n80\t\twalFileMagic   = uint32(0xCC1DA701) // WAL file header magic\n81\t\twalRecordMagic = uint32(0xCC1DA7A1) // WAL record magic\n82\t\tsnapFileMagic  = uint32(0xCC5B0001) // Binary snapshot magic\n83\t)\n84\t\n85\t// walShardChs holds per-shard channels for WAL messages.\n86\t// Initialized by WALStaging; nil when WAL is not active.\n87\tvar walShardChs []chan *WALMessage\n88\t\n89\t// walShardRotateChs holds per-shard channels for WAL rotation requests.\n90\tvar walShardRotateChs []chan walRotateReq\n91\t\n92\t// walNumShards stores the number of shards (set during WALStaging init).\n93\tvar walNumShards int\n94\t\n95\t// walStagingWg tracks WALStaging goroutine exits for shutdown synchronization.\n96\tvar walStagingWg sync.WaitGroup\n97\t\n98\t// walShuttingDown is set before closing shard channels to prevent\n99\t// SendWALMessage from sending on a closed channel (which panics in Go).\n100\tvar walShuttingDown atomic.Bool\n101\t\n102\t// walCheckpointActive is set during binary checkpoint writes.\n103\t// While active, SendWALMessage skips sending (returns true) because the\n104\t// snapshot captures all in-memory data, making WAL writes redundant.\n105\tvar walCheckpointActive atomic.Bool\n106\t\n107\t// WALMessage represents a single metric write to be appended to the WAL.\n108\t// Cluster and Node are NOT stored in the WAL record (inferred from file path).\n109\ttype WALMessage struct {\n110\t\tMetricName string\n111\t\tCluster    string\n112\t\tNode       string\n113\t\tSelector   []string\n114\t\tValue      schema.Float\n115\t\tTimestamp  int64\n116\t}\n117\t\n118\t// walRotateReq requests WAL file rotation for a specific host directory.\n119\t// The done channel is closed by the WAL goroutine when rotation is complete.\n120\ttype walRotateReq struct {\n121\t\thostDir string\n122\t\tdone    chan struct{}\n123\t}\n124\t\n125\t// walFileState holds an open WAL file handle and buffered writer for one host directory.\n126\ttype walFileState struct {\n127\t\tf     *os.File\n128\t\tw     *bufio.Writer\n129\t\tdirty bool\n130\t\tsize  int64 // approximate bytes written (tracked from open + writes)\n131\t}\n132\t\n133\t// walFlushInterval controls how often dirty WAL files are flushed to disk.\n134\t// Decoupling flushes from message processing lets the consumer run at memory\n135\t// speed, amortizing syscall overhead across many writes.\n136\tconst walFlushInterval = 1 * time.Second\n137\t\n138\t// walShardIndex computes which shard a message belongs to based on cluster+node.\n139\t// Uses FNV-1a hash for fast, well-distributed mapping.\n140\tfunc walShardIndex(cluster, node string) int {\n141\t\th := fnv.New32a()\n142\t\th.Write([]byte(cluster))\n143\t\th.Write([]byte{0})\n144\t\th.Write([]byte(node))\n145\t\treturn int(h.Sum32()) % walNumShards\n146\t}\n147\t\n148\t// SendWALMessage routes a WAL message to the appropriate shard channel.\n149\t// Returns false if the channel is full or shutdown is in progress.\n150\tfunc SendWALMessage(msg *WALMessage) bool {\n151\t\tif walShardChs == nil || walShuttingDown.Load() {\n152\t\t\treturn false\n153\t\t}\n154\t\tif walCheckpointActive.Load() {\n155\t\t\treturn true // Data safe in memory; snapshot will capture it\n156\t\t}\n157\t\tshard := walShardIndex(msg.Cluster, msg.Node)\n158\t\tselect {\n159\t\tcase walShardChs[shard] <- msg:\n160\t\t\treturn true\n161\t\tdefault:\n162\t\t\treturn false\n163\t\t}\n164\t}\n165\t\n166\t// WALStaging starts N sharded background goroutines that receive WALMessage items\n167\t// and append binary WAL records to per-host current.wal files.\n168\t// Each shard owns a subset of hosts (determined by hash of cluster+node),\n169\t// parallelizing serialization and I/O while keeping per-host writes serial.\n170\tfunc WALStaging(wg *sync.WaitGroup, ctx context.Context) {\n171\t\tif Keys.Checkpoints.FileFormat == \"json\" {\n172\t\t\treturn\n173\t\t}\n174\t\n175\t\twalNumShards = max(Keys.NumWorkers, 1)\n176\t\tchBufSize := max(65536/walNumShards, 1024)\n177\t\n178\t\twalShardChs = make([]chan *WALMessage, walNumShards)\n179\t\twalShardRotateChs = make([]chan walRotateReq, walNumShards)\n180\t\n181\t\tfor i := range walNumShards {\n182\t\t\twalShardChs[i] = make(chan *WALMessage, chBufSize)\n183\t\t\twalShardRotateChs[i] = make(chan walRotateReq, 64)\n184\t\t}\n185\t\n186\t\tfor i := range walNumShards {\n187\t\t\tmsgCh := walShardChs[i]\n188\t\t\trotateCh := walShardRotateChs[i]\n189\t\n190\t\t\twalStagingWg.Add(1)\n191\t\t\twg.Go(func() {\n192\t\t\t\tdefer walStagingWg.Done()\n193\t\t\t\thostFiles := make(map[string]*walFileState)\n194\t\n195\t\t\t\tdefer func() {\n196\t\t\t\t\tfor _, ws := range hostFiles {\n197\t\t\t\t\t\tif ws.f != nil {\n198\t\t\t\t\t\t\tws.w.Flush()\n199\t\t\t\t\t\t\tws.f.Close()\n200\t\t\t\t\t\t}\n201\t\t\t\t\t}\n202\t\t\t\t}()\n203\t\n204\t\t\t\tgetOrOpenWAL := func(hostDir string) *walFileState {\n205\t\t\t\t\tws, ok := hostFiles[hostDir]\n206\t\t\t\t\tif ok {\n207\t\t\t\t\t\treturn ws\n208\t\t\t\t\t}\n209\t\n210\t\t\t\t\tif err := os.MkdirAll(hostDir, CheckpointDirPerms); err != nil {\n211\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: mkdir %s: %v\", hostDir, err)\n212\t\t\t\t\t\treturn nil\n213\t\t\t\t\t}\n214\t\n215\t\t\t\t\twalPath := path.Join(hostDir, \"current.wal\")\n216\t\t\t\t\tf, err := os.OpenFile(walPath, os.O_CREATE|os.O_APPEND|os.O_WRONLY, CheckpointFilePerms)\n217\t\t\t\t\tif err != nil {\n218\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: open %s: %v\", walPath, err)\n219\t\t\t\t\t\treturn nil\n220\t\t\t\t\t}\n221\t\n222\t\t\t\t\tw := bufio.NewWriter(f)\n223\t\n224\t\t\t\t\t// Write file header magic if file is new (empty).\n225\t\t\t\t\tinfo, err := f.Stat()\n226\t\t\t\t\tvar fileSize int64\n227\t\t\t\t\tif err == nil {\n228\t\t\t\t\t\tfileSize = info.Size()\n229\t\t\t\t\t}\n230\t\t\t\t\tif err == nil && fileSize == 0 {\n231\t\t\t\t\t\tvar hdr [4]byte\n232\t\t\t\t\t\tbinary.LittleEndian.PutUint32(hdr[:], walFileMagic)\n233\t\t\t\t\t\tif _, err := w.Write(hdr[:]); err != nil {\n234\t\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: write header %s: %v\", walPath, err)\n235\t\t\t\t\t\t\tf.Close()\n236\t\t\t\t\t\t\treturn nil\n237\t\t\t\t\t\t}\n238\t\t\t\t\t\tfileSize = 4\n239\t\t\t\t\t}\n240\t\n241\t\t\t\t\tws = &walFileState{f: f, w: w, size: fileSize}\n242\t\t\t\t\thostFiles[hostDir] = ws\n243\t\t\t\t\treturn ws\n244\t\t\t\t}\n245\t\n246\t\t\t\tprocessMsg := func(msg *WALMessage) {\n247\t\t\t\t\thostDir := path.Join(Keys.Checkpoints.RootDir, msg.Cluster, msg.Node)\n248\t\t\t\t\tws := getOrOpenWAL(hostDir)\n249\t\t\t\t\tif ws == nil {\n250\t\t\t\t\t\treturn\n251\t\t\t\t\t}\n252\t\n253\t\t\t\t\t// Enforce max WAL size: force-rotate before writing if limit is exceeded.\n254\t\t\t\t\t// The in-memory store still holds the data; only crash-recovery coverage is lost.\n255\t\t\t\t\tif maxSize := Keys.Checkpoints.MaxWALSize; maxSize > 0 && ws.size >= maxSize {\n256\t\t\t\t\t\tcclog.Warnf(\"[METRICSTORE]> WAL: force-rotating %s (size %d >= limit %d)\",\n257\t\t\t\t\t\t\thostDir, ws.size, maxSize)\n258\t\t\t\t\t\tws.w.Flush()\n259\t\t\t\t\t\tws.f.Close()\n260\t\t\t\t\t\twalPath := path.Join(hostDir, \"current.wal\")\n261\t\t\t\t\t\tif err := os.Remove(walPath); err != nil && !os.IsNotExist(err) {\n262\t\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: remove %s: %v\", walPath, err)\n263\t\t\t\t\t\t}\n264\t\t\t\t\t\tdelete(hostFiles, hostDir)\n265\t\t\t\t\t\tws = getOrOpenWAL(hostDir)\n266\t\t\t\t\t\tif ws == nil {\n267\t\t\t\t\t\t\treturn\n268\t\t\t\t\t\t}\n269\t\t\t\t\t}\n270\t\n271\t\t\t\t\tn, err := writeWALRecordDirect(ws.w, msg)\n272\t\t\t\t\tif err != nil {\n273\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: write record: %v\", err)\n274\t\t\t\t\t}\n275\t\t\t\t\tws.size += int64(n)\n276\t\t\t\t\tws.dirty = true\n277\t\t\t\t}\n278\t\n279\t\t\t\tprocessRotate := func(req walRotateReq) {\n280\t\t\t\t\tws, ok := hostFiles[req.hostDir]\n281\t\t\t\t\tif ok && ws.f != nil {\n282\t\t\t\t\t\tws.w.Flush()\n283\t\t\t\t\t\tws.f.Close()\n284\t\t\t\t\t\twalPath := path.Join(req.hostDir, \"current.wal\")\n285\t\t\t\t\t\tif err := os.Remove(walPath); err != nil && !os.IsNotExist(err) {\n286\t\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: remove %s: %v\", walPath, err)\n287\t\t\t\t\t\t}\n288\t\t\t\t\t\tdelete(hostFiles, req.hostDir)\n289\t\t\t\t\t}\n290\t\t\t\t\tclose(req.done)\n291\t\t\t\t}\n292\t\n293\t\t\t\tflushDirty := func() {\n294\t\t\t\t\tfor _, ws := range hostFiles {\n295\t\t\t\t\t\tif ws.dirty {\n296\t\t\t\t\t\t\tws.w.Flush()\n297\t\t\t\t\t\t\tws.dirty = false\n298\t\t\t\t\t\t}\n299\t\t\t\t\t}\n300\t\t\t\t}\n301\t\n302\t\t\t\tticker := time.NewTicker(walFlushInterval)\n303\t\t\t\tdefer ticker.Stop()\n304\t\n305\t\t\t\t// drainBatch processes up to 4096 pending messages without blocking.\n306\t\t\t\t// Returns false if the channel was closed.\n307\t\t\t\tdrainBatch := func() bool {\n308\t\t\t\t\tfor range 4096 {\n309\t\t\t\t\t\tselect {\n310\t\t\t\t\t\tcase msg, ok := <-msgCh:\n311\t\t\t\t\t\t\tif !ok {\n312\t\t\t\t\t\t\t\tflushDirty()\n313\t\t\t\t\t\t\t\treturn false\n314\t\t\t\t\t\t\t}\n315\t\t\t\t\t\t\tprocessMsg(msg)\n316\t\t\t\t\t\tcase req := <-rotateCh:\n317\t\t\t\t\t\t\tprocessRotate(req)\n318\t\t\t\t\t\tdefault:\n319\t\t\t\t\t\t\treturn true\n320\t\t\t\t\t\t}\n321\t\t\t\t\t}\n322\t\t\t\t\treturn true\n323\t\t\t\t}\n324\t\n325\t\t\t\tfor {\n326\t\t\t\t\tselect {\n327\t\t\t\t\tcase <-ctx.Done():\n328\t\t\t\t\t\t// On shutdown, skip draining buffered messages — a full binary\n329\t\t\t\t\t\t// checkpoint will be written from in-memory state, making\n330\t\t\t\t\t\t// buffered WAL records redundant.\n331\t\t\t\t\t\tflushDirty()\n332\t\t\t\t\t\treturn\n333\t\t\t\t\tcase msg, ok := <-msgCh:\n334\t\t\t\t\t\tif !ok {\n335\t\t\t\t\t\t\treturn\n336\t\t\t\t\t\t}\n337\t\t\t\t\t\tprocessMsg(msg)\n338\t\t\t\t\t\tif !drainBatch() {\n339\t\t\t\t\t\t\treturn\n340\t\t\t\t\t\t}\n341\t\t\t\t\t\t// No flush here — timer handles periodic flushing.\n342\t\t\t\t\tcase <-ticker.C:\n343\t\t\t\t\t\tflushDirty()\n344\t\t\t\t\tcase req := <-rotateCh:\n345\t\t\t\t\t\tprocessRotate(req)\n346\t\t\t\t\t}\n347\t\t\t\t}\n348\t\t\t})\n349\t\t}\n350\t}\n351\t\n352\t// WaitForWALStagingDrain blocks until all WALStaging goroutines have exited.\n353\t// Must be called after closing walShardChs to ensure all file handles are\n354\t// flushed and closed before checkpoint writes begin.\n355\tfunc WaitForWALStagingDrain() {\n356\t\twalStagingWg.Wait()\n357\t}\n358\t\n359\t// RotateWALFiles sends rotation requests for the given host directories\n360\t// and blocks until all rotations complete. Each request is routed to the\n361\t// shard that owns the host directory.\n362\t//\n363\t// If shutdown is in progress (WAL staging goroutines may have exited),\n364\t// rotation is skipped to avoid deadlocking on abandoned channels.\n365\tfunc RotateWALFiles(hostDirs []string) {\n366\t\tif walShardRotateChs == nil || walShuttingDown.Load() {\n367\t\t\treturn\n368\t\t}\n369\t\tdeadline := time.After(2 * time.Minute)\n370\t\tdones := make([]chan struct{}, 0, len(hostDirs))\n371\t\tfor _, dir := range hostDirs {\n372\t\t\tdone := make(chan struct{})\n373\t\t\tshard := walShardIndexFromDir(dir)\n374\t\t\tselect {\n375\t\t\tcase walShardRotateChs[shard] <- walRotateReq{hostDir: dir, done: done}:\n376\t\t\t\tdones = append(dones, done)\n377\t\t\tcase <-deadline:\n378\t\t\t\tcclog.Warnf(\"[METRICSTORE]> WAL rotation send timed out, %d of %d hosts remaining\",\n379\t\t\t\t\tlen(hostDirs)-len(dones), len(hostDirs))\n380\t\t\t\tgoto waitDones\n381\t\t\t}\n382\t\t}\n383\twaitDones:\n384\t\tfor _, done := range dones {\n385\t\t\tselect {\n386\t\t\tcase <-done:\n387\t\t\tcase <-time.After(30 * time.Second):\n388\t\t\t\tcclog.Warn(\"[METRICSTORE]> WAL rotation completion timed out, continuing\")\n389\t\t\t\treturn\n390\t\t\t}\n391\t\t}\n392\t}\n393\t\n394\t// walShardIndexFromDir extracts cluster and node from a host directory path\n395\t// and returns the shard index. The path format is: rootDir/cluster/node\n396\tfunc walShardIndexFromDir(hostDir string) int {\n397\t\t// hostDir = .../cluster/node — extract last two path components\n398\t\tnode := path.Base(hostDir)\n399\t\tcluster := path.Base(path.Dir(hostDir))\n400\t\treturn walShardIndex(cluster, node)\n401\t}\n402\t\n403\t// RotateWALFilesAfterShutdown directly removes current.wal files for the given\n404\t// host directories. Used after shutdown, when WALStaging goroutines have already\n405\t// exited and the channel-based RotateWALFiles is no longer safe to call.\n406\tfunc RotateWALFilesAfterShutdown(hostDirs []string) {\n407\t\tfor _, dir := range hostDirs {\n408\t\t\twalPath := path.Join(dir, \"current.wal\")\n409\t\t\tif err := os.Remove(walPath); err != nil && !os.IsNotExist(err) {\n410\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: remove %s: %v\", walPath, err)\n411\t\t\t}\n412\t\t}\n413\t}\n414\t\n415\t// writeWALRecordDirect encodes a WAL record into a contiguous buffer first,\n416\t// then writes it to the bufio.Writer in a single call. This prevents partial\n417\t// records in the write buffer if a write error occurs mid-record (e.g. disk full).\n418\t// Returns the number of bytes written and any error.\n419\tfunc writeWALRecordDirect(w *bufio.Writer, msg *WALMessage) (int, error) {\n420\t\t// Compute payload and total record size.\n421\t\tpayloadSize := 8 + 2 + len(msg.MetricName) + 1 + 4\n422\t\tfor _, s := range msg.Selector {\n423\t\t\tpayloadSize += 1 + len(s)\n424\t\t}\n425\t\t// Total: 8 (header) + payload + 4 (CRC).\n426\t\ttotalSize := 8 + payloadSize + 4\n427\t\n428\t\t// Use stack buffer for typical small records, heap-allocate only for large ones.\n429\t\tvar stackBuf [256]byte\n430\t\tvar buf []byte\n431\t\tif totalSize <= len(stackBuf) {\n432\t\t\tbuf = stackBuf[:totalSize]\n433\t\t} else {\n434\t\t\tbuf = make([]byte, totalSize)\n435\t\t}\n436\t\n437\t\t// Header: magic + payload length.\n438\t\tbinary.LittleEndian.PutUint32(buf[0:4], walRecordMagic)\n439\t\tbinary.LittleEndian.PutUint32(buf[4:8], uint32(payloadSize))\n440\t\n441\t\t// Payload starts at offset 8.\n442\t\tp := 8\n443\t\n444\t\t// Timestamp (8 bytes).\n445\t\tbinary.LittleEndian.PutUint64(buf[p:p+8], uint64(msg.Timestamp))\n446\t\tp += 8\n447\t\n448\t\t// Metric name length (2 bytes) + metric name.\n449\t\tbinary.LittleEndian.PutUint16(buf[p:p+2], uint16(len(msg.MetricName)))\n450\t\tp += 2\n451\t\tp += copy(buf[p:], msg.MetricName)\n452\t\n453\t\t// Selector count (1 byte).\n454\t\tbuf[p] = byte(len(msg.Selector))\n455\t\tp++\n456\t\n457\t\t// Selectors (1-byte length + bytes each).\n458\t\tfor _, sel := range msg.Selector {\n459\t\t\tbuf[p] = byte(len(sel))\n460\t\t\tp++\n461\t\t\tp += copy(buf[p:], sel)\n462\t\t}\n463\t\n464\t\t// Value (4 bytes, float32 bits).\n465\t\tbinary.LittleEndian.PutUint32(buf[p:p+4], math.Float32bits(float32(msg.Value)))\n466\t\tp += 4\n467\t\n468\t\t// CRC32 over payload (bytes 8..8+payloadSize).\n469\t\tcrc := crc32.ChecksumIEEE(buf[8 : 8+payloadSize])\n470\t\tbinary.LittleEndian.PutUint32(buf[p:p+4], crc)\n471\t\n472\t\t// Single atomic write to the buffered writer.\n473\t\tn, err := w.Write(buf)\n474\t\treturn n, err\n475\t}\n476\t\n477\t// readWALRecord reads one WAL record from the reader.\n478\t// Returns (nil, nil) on clean EOF. Returns error on data corruption.\n479\t// A CRC mismatch indicates a truncated trailing record (expected on crash).\n480\tfunc readWALRecord(r io.Reader) (*WALMessage, error) {\n481\t\tvar magic uint32\n482\t\tif err := binary.Read(r, binary.LittleEndian, &magic); err != nil {\n483\t\t\tif err == io.EOF {\n484\t\t\t\treturn nil, nil // Clean EOF\n485\t\t\t}\n486\t\t\treturn nil, fmt.Errorf(\"read record magic: %w\", err)\n487\t\t}\n488\t\n489\t\tif magic != walRecordMagic {\n490\t\t\treturn nil, fmt.Errorf(\"invalid record magic 0x%08X (expected 0x%08X)\", magic, walRecordMagic)\n491\t\t}\n492\t\n493\t\tvar payloadLen uint32\n494\t\tif err := binary.Read(r, binary.LittleEndian, &payloadLen); err != nil {\n495\t\t\treturn nil, fmt.Errorf(\"read payload length: %w\", err)\n496\t\t}\n497\t\n498\t\tif payloadLen > 1<<20 { // 1 MB sanity limit\n499\t\t\treturn nil, fmt.Errorf(\"record payload too large: %d bytes\", payloadLen)\n500\t\t}\n501\t\n502\t\tpayload := make([]byte, payloadLen)\n503\t\tif _, err := io.ReadFull(r, payload); err != nil {\n504\t\t\treturn nil, fmt.Errorf(\"read payload: %w\", err)\n505\t\t}\n506\t\n507\t\tvar storedCRC uint32\n508\t\tif err := binary.Read(r, binary.LittleEndian, &storedCRC); err != nil {\n509\t\t\treturn nil, fmt.Errorf(\"read CRC: %w\", err)\n510\t\t}\n511\t\n512\t\tif crc32.ChecksumIEEE(payload) != storedCRC {\n513\t\t\treturn nil, fmt.Errorf(\"CRC mismatch (truncated write or corruption)\")\n514\t\t}\n515\t\n516\t\treturn parseWALPayload(payload)\n517\t}\n518\t\n519\t// parseWALPayload decodes a binary payload into a WALMessage.\n520\tfunc parseWALPayload(payload []byte) (*WALMessage, error) {\n521\t\tif len(payload) < 8+2+1+4 {\n522\t\t\treturn nil, fmt.Errorf(\"payload too short: %d bytes\", len(payload))\n523\t\t}\n524\t\n525\t\toffset := 0\n526\t\n527\t\t// Timestamp (8 bytes)\n528\t\tts := int64(binary.LittleEndian.Uint64(payload[offset : offset+8]))\n529\t\toffset += 8\n530\t\n531\t\t// Metric name (2-byte length + bytes)\n532\t\tif offset+2 > len(payload) {\n533\t\t\treturn nil, fmt.Errorf(\"metric name length overflows payload\")\n534\t\t}\n535\t\tmLen := int(binary.LittleEndian.Uint16(payload[offset : offset+2]))\n536\t\toffset += 2\n537\t\n538\t\tif offset+mLen > len(payload) {\n539\t\t\treturn nil, fmt.Errorf(\"metric name overflows payload\")\n540\t\t}\n541\t\tmetricName := string(payload[offset : offset+mLen])\n542\t\toffset += mLen\n543\t\n544\t\t// Selector count (1 byte)\n545\t\tif offset >= len(payload) {\n546\t\t\treturn nil, fmt.Errorf(\"selector count overflows payload\")\n547\t\t}\n548\t\tselCount := int(payload[offset])\n549\t\toffset++\n550\t\n551\t\tselectors := make([]string, selCount)\n552\t\tfor i := range selCount {\n553\t\t\tif offset >= len(payload) {\n554\t\t\t\treturn nil, fmt.Errorf(\"selector[%d] length overflows payload\", i)\n555\t\t\t}\n556\t\t\tsLen := int(payload[offset])\n557\t\t\toffset++\n558\t\n559\t\t\tif offset+sLen > len(payload) {\n560\t\t\t\treturn nil, fmt.Errorf(\"selector[%d] data overflows payload\", i)\n561\t\t\t}\n562\t\t\tselectors[i] = string(payload[offset : offset+sLen])\n563\t\t\toffset += sLen\n564\t\t}\n565\t\n566\t\t// Value (4 bytes, float32 bits)\n567\t\tif offset+4 > len(payload) {\n568\t\t\treturn nil, fmt.Errorf(\"value overflows payload\")\n569\t\t}\n570\t\tbits := binary.LittleEndian.Uint32(payload[offset : offset+4])\n571\t\tvalue := schema.Float(math.Float32frombits(bits))\n572\t\n573\t\treturn &WALMessage{\n574\t\t\tMetricName: metricName,\n575\t\t\tTimestamp:  ts,\n576\t\t\tSelector:   selectors,\n577\t\t\tValue:      value,\n578\t\t}, nil\n579\t}\n580\t\n581\t// loadWALFile reads a WAL file and replays all valid records into the Level tree.\n582\t// l is the host-level node. Corrupt or partial trailing records are silently skipped\n583\t// (expected on crash). Records older than 'from' are skipped.\n584\tfunc (l *Level) loadWALFile(m *MemoryStore, f *os.File, from int64) error {\n585\t\tbr := bufio.NewReader(f)\n586\t\n587\t\t// Verify file header magic.\n588\t\tvar fileMagic uint32\n589\t\tif err := binary.Read(br, binary.LittleEndian, &fileMagic); err != nil {\n590\t\t\tif err == io.EOF {\n591\t\t\t\treturn nil // Empty file, no data\n592\t\t\t}\n593\t\t\treturn fmt.Errorf(\"[METRICSTORE]> WAL: read file header: %w\", err)\n594\t\t}\n595\t\n596\t\tif fileMagic != walFileMagic {\n597\t\t\treturn fmt.Errorf(\"[METRICSTORE]> WAL: invalid file magic 0x%08X (expected 0x%08X)\", fileMagic, walFileMagic)\n598\t\t}\n599\t\n600\t\t// Cache level lookups to avoid repeated tree traversal.\n601\t\tlvlCache := make(map[string]*Level)\n602\t\n603\t\tfor {\n604\t\t\tmsg, err := readWALRecord(br)\n605\t\t\tif err != nil {\n606\t\t\t\t// Truncated trailing record is expected after a crash; stop replaying.\n607\t\t\t\tcclog.Debugf(\"[METRICSTORE]> WAL: stopping replay at corrupted/partial record: %v\", err)\n608\t\t\t\tbreak\n609\t\t\t}\n610\t\t\tif msg == nil {\n611\t\t\t\tbreak // Clean EOF\n612\t\t\t}\n613\t\n614\t\t\tif msg.Timestamp < from {\n615\t\t\t\tcontinue // Older than retention window\n616\t\t\t}\n617\t\n618\t\t\tminfo, ok := m.Metrics[msg.MetricName]\n619\t\t\tif !ok {\n620\t\t\t\tcontinue // Unknown metric (config may have changed)\n621\t\t\t}\n622\t\n623\t\t\t// Cache key is the null-separated selector path.\n624\t\t\tcacheKey := joinSelector(msg.Selector)\n625\t\t\tlvl, ok := lvlCache[cacheKey]\n626\t\t\tif !ok {\n627\t\t\t\tlvl = l.findLevelOrCreate(msg.Selector, len(m.Metrics))\n628\t\t\t\tlvlCache[cacheKey] = lvl\n629\t\t\t}\n630\t\n631\t\t\t// Write directly to the buffer, same as WriteToLevel but without the\n632\t\t\t// global level lookup (we already have the right level).\n633\t\t\tlvl.lock.Lock()\n634\t\t\tb := lvl.metrics[minfo.offset]\n635\t\t\tif b == nil {\n636\t\t\t\tb = newBuffer(msg.Timestamp, minfo.Frequency)\n637\t\t\t\tlvl.metrics[minfo.offset] = b\n638\t\t\t}\n639\t\t\tnb, writeErr := b.write(msg.Timestamp, msg.Value)\n640\t\t\tif writeErr == nil && b != nb {\n641\t\t\t\tlvl.metrics[minfo.offset] = nb\n642\t\t\t}\n643\t\t\t// Ignore write errors for timestamps before buffer start (can happen when\n644\t\t\t// replaying WAL entries that predate a loaded snapshot's start time).\n645\t\t\tlvl.lock.Unlock()\n646\t\t}\n647\t\n648\t\treturn nil\n649\t}\n650\t\n651\t// joinSelector builds a cache key from a selector slice using null bytes as separators.\n652\tfunc joinSelector(sel []string) string {\n653\t\tif len(sel) == 0 {\n654\t\t\treturn \"\"\n655\t\t}\n656\t\tvar result strings.Builder\n657\t\tresult.WriteString(sel[0])\n658\t\tfor i := 1; i < len(sel); i++ {\n659\t\t\tresult.WriteString(\"\\x00\" + sel[i])\n660\t\t}\n661\t\treturn result.String()\n662\t}\n663\t\n664\t// ToCheckpointWAL writes binary snapshot files for all hosts in parallel.\n665\t// Returns the number of files written, the list of host directories that were\n666\t// successfully checkpointed (for WAL rotation), and any errors.\n667\tfunc (m *MemoryStore) ToCheckpointWAL(dir string, from, to int64) (int, []string, error) {\n668\t\t// Collect all cluster/host pairs.\n669\t\tm.root.lock.RLock()\n670\t\ttotalHosts := 0\n671\t\tfor _, l1 := range m.root.children {\n672\t\t\tl1.lock.RLock()\n673\t\t\ttotalHosts += len(l1.children)\n674\t\t\tl1.lock.RUnlock()\n675\t\t}\n676\t\tm.root.lock.RUnlock()\n677\t\n678\t\tlevels := make([]*Level, 0, totalHosts)\n679\t\tselectors := make([][]string, 0, totalHosts)\n680\t\n681\t\tm.root.lock.RLock()\n682\t\tfor sel1, l1 := range m.root.children {\n683\t\t\tl1.lock.RLock()\n684\t\t\tfor sel2, l2 := range l1.children {\n685\t\t\t\tlevels = append(levels, l2)\n686\t\t\t\tselectors = append(selectors, []string{sel1, sel2})\n687\t\t\t}\n688\t\t\tl1.lock.RUnlock()\n689\t\t}\n690\t\tm.root.lock.RUnlock()\n691\t\n692\t\ttype workItem struct {\n693\t\t\tlevel    *Level\n694\t\t\thostDir  string\n695\t\t\tselector []string\n696\t\t}\n697\t\n698\t\ttotalWork := len(levels)\n699\t\tcclog.Infof(\"[METRICSTORE]> Starting binary checkpoint for %d hosts with %d workers\", totalWork, Keys.NumWorkers)\n700\t\n701\t\tn, errs, completed := int32(0), int32(0), int32(0)\n702\t\tvar successDirs []string\n703\t\tvar successMu sync.Mutex\n704\t\n705\t\tvar wg sync.WaitGroup\n706\t\twg.Add(Keys.NumWorkers)\n707\t\twork := make(chan workItem, Keys.NumWorkers*2)\n708\t\n709\t\t// Progress logging goroutine.\n710\t\tstopProgress := make(chan struct{})\n711\t\tgo func() {\n712\t\t\tticker := time.NewTicker(10 * time.Second)\n713\t\t\tdefer ticker.Stop()\n714\t\t\tfor {\n715\t\t\t\tselect {\n716\t\t\t\tcase <-ticker.C:\n717\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> Checkpoint progress: %d/%d hosts (%d written, %d errors)\",\n718\t\t\t\t\t\tatomic.LoadInt32(&completed), totalWork, atomic.LoadInt32(&n), atomic.LoadInt32(&errs))\n719\t\t\t\tcase <-stopProgress:\n720\t\t\t\t\treturn\n721\t\t\t\t}\n722\t\t\t}\n723\t\t}()\n724\t\n725\t\tfor range Keys.NumWorkers {\n726\t\t\tgo func() {\n727\t\t\t\tdefer wg.Done()\n728\t\t\t\tfor wi := range work {\n729\t\t\t\t\terr := wi.level.toCheckpointBinary(wi.hostDir, from, to, m)\n730\t\t\t\t\tif err != nil {\n731\t\t\t\t\t\tif err == ErrNoNewArchiveData {\n732\t\t\t\t\t\t\tatomic.AddInt32(&completed, 1)\n733\t\t\t\t\t\t\tcontinue\n734\t\t\t\t\t\t}\n735\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> binary checkpoint error for %s: %v\", wi.hostDir, err)\n736\t\t\t\t\t\tatomic.AddInt32(&errs, 1)\n737\t\t\t\t\t} else {\n738\t\t\t\t\t\tatomic.AddInt32(&n, 1)\n739\t\t\t\t\t\tsuccessMu.Lock()\n740\t\t\t\t\t\tsuccessDirs = append(successDirs, wi.hostDir)\n741\t\t\t\t\t\tsuccessMu.Unlock()\n742\t\t\t\t\t}\n743\t\t\t\t\tatomic.AddInt32(&completed, 1)\n744\t\t\t\t}\n745\t\t\t}()\n746\t\t}\n747\t\n748\t\tfor i := range levels {\n749\t\t\thostDir := path.Join(dir, path.Join(selectors[i]...))\n750\t\t\twork <- workItem{\n751\t\t\t\tlevel:    levels[i],\n752\t\t\t\thostDir:  hostDir,\n753\t\t\t\tselector: selectors[i],\n754\t\t\t}\n755\t\t}\n756\t\tclose(work)\n757\t\twg.Wait()\n758\t\tclose(stopProgress)\n759\t\n760\t\tif errs > 0 {\n761\t\t\treturn int(n), successDirs, fmt.Errorf(\"[METRICSTORE]> %d errors during binary checkpoint (%d successes)\", errs, n)\n762\t\t}\n763\t\treturn int(n), successDirs, nil\n764\t}\n765\t\n766\t// toCheckpointBinary writes a binary snapshot file for a single host-level node.\n767\t// Uses atomic rename (write to .tmp then rename) to avoid partial reads on crash.\n768\tfunc (l *Level) toCheckpointBinary(dir string, from, to int64, m *MemoryStore) error {\n769\t\tcf, err := l.toCheckpointFile(from, to, m)\n770\t\tif err != nil {\n771\t\t\treturn err\n772\t\t}\n773\t\tif cf == nil {\n774\t\t\treturn ErrNoNewArchiveData\n775\t\t}\n776\t\n777\t\tif err := os.MkdirAll(dir, CheckpointDirPerms); err != nil {\n778\t\t\treturn fmt.Errorf(\"mkdir %s: %w\", dir, err)\n779\t\t}\n780\t\n781\t\t// Write to a temp file first, then rename (atomic on POSIX).\n782\t\ttmpPath := path.Join(dir, fmt.Sprintf(\"%d.bin.tmp\", from))\n783\t\tfinalPath := path.Join(dir, fmt.Sprintf(\"%d.bin\", from))\n784\t\n785\t\tf, err := os.OpenFile(tmpPath, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, CheckpointFilePerms)\n786\t\tif err != nil {\n787\t\t\treturn fmt.Errorf(\"open binary snapshot %s: %w\", tmpPath, err)\n788\t\t}\n789\t\n790\t\tbw := bufio.NewWriter(f)\n791\t\tif err := writeBinarySnapshotFile(bw, cf); err != nil {\n792\t\t\tf.Close()\n793\t\t\tos.Remove(tmpPath)\n794\t\t\treturn fmt.Errorf(\"write binary snapshot: %w\", err)\n795\t\t}\n796\t\tif err := bw.Flush(); err != nil {\n797\t\t\tf.Close()\n798\t\t\tos.Remove(tmpPath)\n799\t\t\treturn err\n800\t\t}\n801\t\tf.Close()\n802\t\n803\t\treturn os.Rename(tmpPath, finalPath)\n804\t}\n805\t\n806\t// writeBinarySnapshotFile writes the binary snapshot file header and level tree.\n807\tfunc writeBinarySnapshotFile(w io.Writer, cf *CheckpointFile) error {\n808\t\tif err := binary.Write(w, binary.LittleEndian, snapFileMagic); err != nil {\n809\t\t\treturn err\n810\t\t}\n811\t\tif err := binary.Write(w, binary.LittleEndian, cf.From); err != nil {\n812\t\t\treturn err\n813\t\t}\n814\t\tif err := binary.Write(w, binary.LittleEndian, cf.To); err != nil {\n815\t\t\treturn err\n816\t\t}\n817\t\treturn writeBinaryLevel(w, cf)\n818\t}\n819\t\n820\t// writeBinaryLevel recursively writes a CheckpointFile level in binary format.\n821\tfunc writeBinaryLevel(w io.Writer, cf *CheckpointFile) error {\n822\t\tif err := binary.Write(w, binary.LittleEndian, uint32(len(cf.Metrics))); err != nil {\n823\t\t\treturn err\n824\t\t}\n825\t\n826\t\tfor name, metric := range cf.Metrics {\n827\t\t\tif err := writeString16(w, name); err != nil {\n828\t\t\t\treturn err\n829\t\t\t}\n830\t\t\tif err := binary.Write(w, binary.LittleEndian, metric.Frequency); err != nil {\n831\t\t\t\treturn err\n832\t\t\t}\n833\t\t\tif err := binary.Write(w, binary.LittleEndian, metric.Start); err != nil {\n834\t\t\t\treturn err\n835\t\t\t}\n836\t\t\tif err := binary.Write(w, binary.LittleEndian, uint32(len(metric.Data))); err != nil {\n837\t\t\t\treturn err\n838\t\t\t}\n839\t\t\tfor _, v := range metric.Data {\n840\t\t\t\tif err := binary.Write(w, binary.LittleEndian, math.Float32bits(float32(v))); err != nil {\n841\t\t\t\t\treturn err\n842\t\t\t\t}\n843\t\t\t}\n844\t\t}\n845\t\n846\t\tif err := binary.Write(w, binary.LittleEndian, uint32(len(cf.Children))); err != nil {\n847\t\t\treturn err\n848\t\t}\n849\t\n850\t\tfor name, child := range cf.Children {\n851\t\t\tif err := writeString16(w, name); err != nil {\n852\t\t\t\treturn err\n853\t\t\t}\n854\t\t\tif err := writeBinaryLevel(w, child); err != nil {\n855\t\t\t\treturn err\n856\t\t\t}\n857\t\t}\n858\t\n859\t\treturn nil\n860\t}\n861\t\n862\t// writeString16 writes a 2-byte length-prefixed string to w.\n863\tfunc writeString16(w io.Writer, s string) error {\n864\t\tif err := binary.Write(w, binary.LittleEndian, uint16(len(s))); err != nil {\n865\t\t\treturn err\n866\t\t}\n867\t\t_, err := io.WriteString(w, s)\n868\t\treturn err\n869\t}\n870\t\n871\t// loadBinaryFile reads a binary snapshot file and loads data into the Level tree.\n872\t// The retention check (from) is applied to the file's 'to' timestamp.\n873\tfunc (l *Level) loadBinaryFile(m *MemoryStore, f *os.File, from int64) error {\n874\t\tbr := bufio.NewReader(f)\n875\t\n876\t\tvar magic uint32\n877\t\tif err := binary.Read(br, binary.LittleEndian, &magic); err != nil {\n878\t\t\treturn fmt.Errorf(\"[METRICSTORE]> binary snapshot: read magic: %w\", err)\n879\t\t}\n880\t\tif magic != snapFileMagic {\n881\t\t\treturn fmt.Errorf(\"[METRICSTORE]> binary snapshot: invalid magic 0x%08X (expected 0x%08X)\", magic, snapFileMagic)\n882\t\t}\n883\t\n884\t\tvar fileFrom, fileTo int64\n885\t\tif err := binary.Read(br, binary.LittleEndian, &fileFrom); err != nil {\n886\t\t\treturn fmt.Errorf(\"[METRICSTORE]> binary snapshot: read from: %w\", err)\n887\t\t}\n888\t\tif err := binary.Read(br, binary.LittleEndian, &fileTo); err != nil {\n889\t\t\treturn fmt.Errorf(\"[METRICSTORE]> binary snapshot: read to: %w\", err)\n890\t\t}\n891\t\n892\t\tif fileTo != 0 && fileTo < from {\n893\t\t\treturn nil // File is older than retention window, skip it\n894\t\t}\n895\t\n896\t\tcf, err := readBinaryLevel(br)\n897\t\tif err != nil {\n898\t\t\treturn fmt.Errorf(\"[METRICSTORE]> binary snapshot: read level tree: %w\", err)\n899\t\t}\n900\t\tcf.From = fileFrom\n901\t\tcf.To = fileTo\n902\t\n903\t\treturn l.loadFile(cf, m)\n904\t}\n905\t\n906\t// readBinaryLevel recursively reads a level from the binary snapshot format.\n907\tfunc readBinaryLevel(r io.Reader) (*CheckpointFile, error) {\n908\t\tcf := &CheckpointFile{\n909\t\t\tMetrics:  make(map[string]*CheckpointMetrics),\n910\t\t\tChildren: make(map[string]*CheckpointFile),\n911\t\t}\n912\t\n913\t\tvar numMetrics uint32\n914\t\tif err := binary.Read(r, binary.LittleEndian, &numMetrics); err != nil {\n915\t\t\treturn nil, fmt.Errorf(\"read num_metrics: %w\", err)\n916\t\t}\n917\t\n918\t\tfor range numMetrics {\n919\t\t\tname, err := readString16(r)\n920\t\t\tif err != nil {\n921\t\t\t\treturn nil, fmt.Errorf(\"read metric name: %w\", err)\n922\t\t\t}\n923\t\n924\t\t\tvar freq, start int64\n925\t\t\tif err := binary.Read(r, binary.LittleEndian, &freq); err != nil {\n926\t\t\t\treturn nil, fmt.Errorf(\"read frequency for %s: %w\", name, err)\n927\t\t\t}\n928\t\t\tif err := binary.Read(r, binary.LittleEndian, &start); err != nil {\n929\t\t\t\treturn nil, fmt.Errorf(\"read start for %s: %w\", name, err)\n930\t\t\t}\n931\t\n932\t\t\tvar numValues uint32\n933\t\t\tif err := binary.Read(r, binary.LittleEndian, &numValues); err != nil {\n934\t\t\t\treturn nil, fmt.Errorf(\"read num_values for %s: %w\", name, err)\n935\t\t\t}\n936\t\n937\t\t\tdata := make([]schema.Float, numValues)\n938\t\t\tfor i := range numValues {\n939\t\t\t\tvar bits uint32\n940\t\t\t\tif err := binary.Read(r, binary.LittleEndian, &bits); err != nil {\n941\t\t\t\t\treturn nil, fmt.Errorf(\"read value[%d] for %s: %w\", i, name, err)\n942\t\t\t\t}\n943\t\t\t\tdata[i] = schema.Float(math.Float32frombits(bits))\n944\t\t\t}\n945\t\n946\t\t\tcf.Metrics[name] = &CheckpointMetrics{\n947\t\t\t\tFrequency: freq,\n948\t\t\t\tStart:     start,\n949\t\t\t\tData:      data,\n950\t\t\t}\n951\t\t}\n952\t\n953\t\tvar numChildren uint32\n954\t\tif err := binary.Read(r, binary.LittleEndian, &numChildren); err != nil {\n955\t\t\treturn nil, fmt.Errorf(\"read num_children: %w\", err)\n956\t\t}\n957\t\n958\t\tfor range numChildren {\n959\t\t\tchildName, err := readString16(r)\n960\t\t\tif err != nil {\n961\t\t\t\treturn nil, fmt.Errorf(\"read child name: %w\", err)\n962\t\t\t}\n963\t\n964\t\t\tchild, err := readBinaryLevel(r)\n965\t\t\tif err != nil {\n966\t\t\t\treturn nil, fmt.Errorf(\"read child %s: %w\", childName, err)\n967\t\t\t}\n968\t\t\tcf.Children[childName] = child\n969\t\t}\n970\t\n971\t\treturn cf, nil\n972\t}\n973\t\n974\t// readString16 reads a 2-byte length-prefixed string from r.\n975\tfunc readString16(r io.Reader) (string, error) {\n976\t\tvar sLen uint16\n977\t\tif err := binary.Read(r, binary.LittleEndian, &sLen); err != nil {\n978\t\t\treturn \"\", err\n979\t\t}\n980\t\tbuf := make([]byte, sLen)\n981\t\tif _, err := io.ReadFull(r, buf); err != nil {\n982\t\t\treturn \"\", err\n983\t\t}\n984\t\treturn string(buf), nil\n985\t}\n986\t"}]},"uuid":"92de2e37-9e08-4b6f-abeb-94f747359225","timestamp":"2026-06-05T06:32:32.052Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go","content":"// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n// All rights reserved. This file is part of cc-backend.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\n// Package metricstore provides walCheckpoint.go: WAL-based checkpoint implementation.\n//\n// This replaces the Avro shadow tree with an append-only Write-Ahead Log (WAL)\n// per host, eliminating the extra memory overhead of the AvroStore and providing\n// truly continuous (per-write) crash safety.\n//\n// # Architecture\n//\n//\tMetric write (DecodeLine)\n//\t      │\n//\t      ├─► WriteToLevel()    → main MemoryStore (unchanged)\n//\t      │\n//\t      └─► WALMessages channel\n//\t               │\n//\t               ▼\n//\t        WALStaging goroutine\n//\t               │\n//\t               ▼\n//\t        checkpoints/cluster/host/current.wal  (append-only, binary)\n//\n//\tPeriodic checkpoint (Checkpointing goroutine):\n//\t  1. Write <timestamp>.bin snapshot (column-oriented, from main tree)\n//\t  2. Signal WALStaging to truncate current.wal per host\n//\n//\tOn restart (FromCheckpoint):\n//\t  1. Load most recent <timestamp>.bin snapshot\n//\t  2. Replay current.wal (overwrite-safe: buffer.write handles duplicate timestamps)\n//\n// # WAL Record Format\n//\n//\t[4B magic 0xCC1DA7A1][4B payload_len][payload][4B CRC32]\n//\n//\tpayload:\n//\t  [8B timestamp int64]\n//\t  [2B metric_name_len uint16][N metric name bytes]\n//\t  [1B selector_count uint8]\n//\t  per selector: [1B selector_len uint8][M selector bytes]\n//\t  [4B value float32 bits]\n//\n// # Binary Snapshot Format\n//\n//\t[4B magic 0xCC5B0001][8B from int64][8B to int64]\n//\tLevel tree (recursive):\n//\t  [4B num_metrics uint32]\n//\t  per metric:\n//\t    [2B name_len uint16][N name bytes]\n//\t    [8B frequency int64][8B start int64]\n//\t    [4B num_values uint32][num_values × 4B float32]\n//\t  [4B num_children uint32]\n//\t  per child: [2B name_len uint16][N name bytes] + Level (recursive)\npackage metricstore\n\nimport (\n\t\"bufio\"\n\t\"context\"\n\t\"encoding/binary\"\n\t\"fmt\"\n\t\"hash/crc32\"\n\t\"hash/fnv\"\n\t\"io\"\n\t\"math\"\n\t\"os\"\n\t\"path\"\n\t\"strings\"\n\t\"sync\"\n\t\"sync/atomic\"\n\t\"time\"\n\n\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n)\n\n// Magic numbers for binary formats.\nconst (\n\twalFileMagic   = uint32(0xCC1DA701) // WAL file header magic\n\twalRecordMagic = uint32(0xCC1DA7A1) // WAL record magic\n\tsnapFileMagic  = uint32(0xCC5B0001) // Binary snapshot magic\n)\n\n// walShardChs holds per-shard channels for WAL messages.\n// Initialized by WALStaging; nil when WAL is not active.\nvar walShardChs []chan *WALMessage\n\n// walShardRotateChs holds per-shard channels for WAL rotation requests.\nvar walShardRotateChs []chan walRotateReq\n\n// walNumShards stores the number of shards (set during WALStaging init).\nvar walNumShards int\n\n// walStagingWg tracks WALStaging goroutine exits for shutdown synchronization.\nvar walStagingWg sync.WaitGroup\n\n// walShuttingDown is set before closing shard channels to prevent\n// SendWALMessage from sending on a closed channel (which panics in Go).\nvar walShuttingDown atomic.Bool\n\n// walCheckpointActive is set during binary checkpoint writes.\n// While active, SendWALMessage skips sending (returns true) because the\n// snapshot captures all in-memory data, making WAL writes redundant.\nvar walCheckpointActive atomic.Bool\n\n// WALMessage represents a single metric write to be appended to the WAL.\n// Cluster and Node are NOT stored in the WAL record (inferred from file path).\ntype WALMessage struct {\n\tMetricName string\n\tCluster    string\n\tNode       string\n\tSelector   []string\n\tValue      schema.Float\n\tTimestamp  int64\n}\n\n// walRotateReq requests WAL file rotation for a specific host directory.\n// The done channel is closed by the WAL goroutine when rotation is complete.\ntype walRotateReq struct {\n\thostDir string\n\tdone    chan struct{}\n}\n\n// walFileState holds an open WAL file handle and buffered writer for one host directory.\ntype walFileState struct {\n\tf     *os.File\n\tw     *bufio.Writer\n\tdirty bool\n\tsize  int64 // approximate bytes written (tracked from open + writes)\n}\n\n// walFlushInterval controls how often dirty WAL files are flushed to disk.\n// Decoupling flushes from message processing lets the consumer run at memory\n// speed, amortizing syscall overhead across many writes.\nconst walFlushInterval = 1 * time.Second\n\n// walShardIndex computes which shard a message belongs to based on cluster+node.\n// Uses FNV-1a hash for fast, well-distributed mapping.\nfunc walShardIndex(cluster, node string) int {\n\th := fnv.New32a()\n\th.Write([]byte(cluster))\n\th.Write([]byte{0})\n\th.Write([]byte(node))\n\treturn int(h.Sum32()) % walNumShards\n}\n\n// SendWALMessage routes a WAL message to the appropriate shard channel.\n// Returns false if the channel is full or shutdown is in progress.\nfunc SendWALMessage(msg *WALMessage) bool {\n\tif walShardChs == nil || walShuttingDown.Load() {\n\t\treturn false\n\t}\n\tif walCheckpointActive.Load() {\n\t\treturn true // Data safe in memory; snapshot will capture it\n\t}\n\tshard := walShardIndex(msg.Cluster, msg.Node)\n\tselect {\n\tcase walShardChs[shard] <- msg:\n\t\treturn true\n\tdefault:\n\t\treturn false\n\t}\n}\n\n// WALStaging starts N sharded background goroutines that receive WALMessage items\n// and append binary WAL records to per-host current.wal files.\n// Each shard owns a subset of hosts (determined by hash of cluster+node),\n// parallelizing serialization and I/O while keeping per-host writes serial.\nfunc WALStaging(wg *sync.WaitGroup, ctx context.Context) {\n\tif Keys.Checkpoints.FileFormat == \"json\" {\n\t\treturn\n\t}\n\n\twalNumShards = max(Keys.NumWorkers, 1)\n\tchBufSize := max(65536/walNumShards, 1024)\n\n\twalShardChs = make([]chan *WALMessage, walNumShards)\n\twalShardRotateChs = make([]chan walRotateReq, walNumShards)\n\n\tfor i := range walNumShards {\n\t\twalShardChs[i] = make(chan *WALMessage, chBufSize)\n\t\twalShardRotateChs[i] = make(chan walRotateReq, 64)\n\t}\n\n\tfor i := range walNumShards {\n\t\tmsgCh := walShardChs[i]\n\t\trotateCh := walShardRotateChs[i]\n\n\t\twalStagingWg.Add(1)\n\t\twg.Go(func() {\n\t\t\tdefer walStagingWg.Done()\n\t\t\thostFiles := make(map[string]*walFileState)\n\n\t\t\tdefer func() {\n\t\t\t\tfor _, ws := range hostFiles {\n\t\t\t\t\tif ws.f != nil {\n\t\t\t\t\t\tws.w.Flush()\n\t\t\t\t\t\tws.f.Close()\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}()\n\n\t\t\tgetOrOpenWAL := func(hostDir string) *walFileState {\n\t\t\t\tws, ok := hostFiles[hostDir]\n\t\t\t\tif ok {\n\t\t\t\t\treturn ws\n\t\t\t\t}\n\n\t\t\t\tif err := os.MkdirAll(hostDir, CheckpointDirPerms); err != nil {\n\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: mkdir %s: %v\", hostDir, err)\n\t\t\t\t\treturn nil\n\t\t\t\t}\n\n\t\t\t\twalPath := path.Join(hostDir, \"current.wal\")\n\t\t\t\tf, err := os.OpenFile(walPath, os.O_CREATE|os.O_APPEND|os.O_WRONLY, CheckpointFilePerms)\n\t\t\t\tif err != nil {\n\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: open %s: %v\", walPath, err)\n\t\t\t\t\treturn nil\n\t\t\t\t}\n\n\t\t\t\tw := bufio.NewWriter(f)\n\n\t\t\t\t// Write file header magic if file is new (empty).\n\t\t\t\tinfo, err := f.Stat()\n\t\t\t\tvar fileSize int64\n\t\t\t\tif err == nil {\n\t\t\t\t\tfileSize = info.Size()\n\t\t\t\t}\n\t\t\t\tif err == nil && fileSize == 0 {\n\t\t\t\t\tvar hdr [4]byte\n\t\t\t\t\tbinary.LittleEndian.PutUint32(hdr[:], walFileMagic)\n\t\t\t\t\tif _, err := w.Write(hdr[:]); err != nil {\n\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: write header %s: %v\", walPath, err)\n\t\t\t\t\t\tf.Close()\n\t\t\t\t\t\treturn nil\n\t\t\t\t\t}\n\t\t\t\t\tfileSize = 4\n\t\t\t\t}\n\n\t\t\t\tws = &walFileState{f: f, w: w, size: fileSize}\n\t\t\t\thostFiles[hostDir] = ws\n\t\t\t\treturn ws\n\t\t\t}\n\n\t\t\tprocessMsg := func(msg *WALMessage) {\n\t\t\t\thostDir := path.Join(Keys.Checkpoints.RootDir, msg.Cluster, msg.Node)\n\t\t\t\tws := getOrOpenWAL(hostDir)\n\t\t\t\tif ws == nil {\n\t\t\t\t\treturn\n\t\t\t\t}\n\n\t\t\t\t// Enforce max WAL size: force-rotate before writing if limit is exceeded.\n\t\t\t\t// The in-memory store still holds the data; only crash-recovery coverage is lost.\n\t\t\t\tif maxSize := Keys.Checkpoints.MaxWALSize; maxSize > 0 && ws.size >= maxSize {\n\t\t\t\t\tcclog.Warnf(\"[METRICSTORE]> WAL: force-rotating %s (size %d >= limit %d)\",\n\t\t\t\t\t\thostDir, ws.size, maxSize)\n\t\t\t\t\tws.w.Flush()\n\t\t\t\t\tws.f.Close()\n\t\t\t\t\twalPath := path.Join(hostDir, \"current.wal\")\n\t\t\t\t\tif err := os.Remove(walPath); err != nil && !os.IsNotExist(err) {\n\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: remove %s: %v\", walPath, err)\n\t\t\t\t\t}\n\t\t\t\t\tdelete(hostFiles, hostDir)\n\t\t\t\t\tws = getOrOpenWAL(hostDir)\n\t\t\t\t\tif ws == nil {\n\t\t\t\t\t\treturn\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tn, err := writeWALRecordDirect(ws.w, msg)\n\t\t\t\tif err != nil {\n\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: write record: %v\", err)\n\t\t\t\t}\n\t\t\t\tws.size += int64(n)\n\t\t\t\tws.dirty = true\n\t\t\t}\n\n\t\t\tprocessRotate := func(req walRotateReq) {\n\t\t\t\tws, ok := hostFiles[req.hostDir]\n\t\t\t\tif ok && ws.f != nil {\n\t\t\t\t\tws.w.Flush()\n\t\t\t\t\tws.f.Close()\n\t\t\t\t\twalPath := path.Join(req.hostDir, \"current.wal\")\n\t\t\t\t\tif err := os.Remove(walPath); err != nil && !os.IsNotExist(err) {\n\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: remove %s: %v\", walPath, err)\n\t\t\t\t\t}\n\t\t\t\t\tdelete(hostFiles, req.hostDir)\n\t\t\t\t}\n\t\t\t\tclose(req.done)\n\t\t\t}\n\n\t\t\tflushDirty := func() {\n\t\t\t\tfor _, ws := range hostFiles {\n\t\t\t\t\tif ws.dirty {\n\t\t\t\t\t\tws.w.Flush()\n\t\t\t\t\t\tws.dirty = false\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tticker := time.NewTicker(walFlushInterval)\n\t\t\tdefer ticker.Stop()\n\n\t\t\t// drainBatch processes up to 4096 pending messages without blocking.\n\t\t\t// Returns false if the channel was closed.\n\t\t\tdrainBatch := func() bool {\n\t\t\t\tfor range 4096 {\n\t\t\t\t\tselect {\n\t\t\t\t\tcase msg, ok := <-msgCh:\n\t\t\t\t\t\tif !ok {\n\t\t\t\t\t\t\tflushDirty()\n\t\t\t\t\t\t\treturn false\n\t\t\t\t\t\t}\n\t\t\t\t\t\tprocessMsg(msg)\n\t\t\t\t\tcase req := <-rotateCh:\n\t\t\t\t\t\tprocessRotate(req)\n\t\t\t\t\tdefault:\n\t\t\t\t\t\treturn true\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\treturn true\n\t\t\t}\n\n\t\t\tfor {\n\t\t\t\tselect {\n\t\t\t\tcase <-ctx.Done():\n\t\t\t\t\t// On shutdown, skip draining buffered messages — a full binary\n\t\t\t\t\t// checkpoint will be written from in-memory state, making\n\t\t\t\t\t// buffered WAL records redundant.\n\t\t\t\t\tflushDirty()\n\t\t\t\t\treturn\n\t\t\t\tcase msg, ok := <-msgCh:\n\t\t\t\t\tif !ok {\n\t\t\t\t\t\treturn\n\t\t\t\t\t}\n\t\t\t\t\tprocessMsg(msg)\n\t\t\t\t\tif !drainBatch() {\n\t\t\t\t\t\treturn\n\t\t\t\t\t}\n\t\t\t\t\t// No flush here — timer handles periodic flushing.\n\t\t\t\tcase <-ticker.C:\n\t\t\t\t\tflushDirty()\n\t\t\t\tcase req := <-rotateCh:\n\t\t\t\t\tprocessRotate(req)\n\t\t\t\t}\n\t\t\t}\n\t\t})\n\t}\n}\n\n// WaitForWALStagingDrain blocks until all WALStaging goroutines have exited.\n// Must be called after closing walShardChs to ensure all file handles are\n// flushed and closed before checkpoint writes begin.\nfunc WaitForWALStagingDrain() {\n\twalStagingWg.Wait()\n}\n\n// RotateWALFiles sends rotation requests for the given host directories\n// and blocks until all rotations complete. Each request is routed to the\n// shard that owns the host directory.\n//\n// If shutdown is in progress (WAL staging goroutines may have exited),\n// rotation is skipped to avoid deadlocking on abandoned channels.\nfunc RotateWALFiles(hostDirs []string) {\n\tif walShardRotateChs == nil || walShuttingDown.Load() {\n\t\treturn\n\t}\n\tdeadline := time.After(2 * time.Minute)\n\tdones := make([]chan struct{}, 0, len(hostDirs))\n\tfor _, dir := range hostDirs {\n\t\tdone := make(chan struct{})\n\t\tshard := walShardIndexFromDir(dir)\n\t\tselect {\n\t\tcase walShardRotateChs[shard] <- walRotateReq{hostDir: dir, done: done}:\n\t\t\tdones = append(dones, done)\n\t\tcase <-deadline:\n\t\t\tcclog.Warnf(\"[METRICSTORE]> WAL rotation send timed out, %d of %d hosts remaining\",\n\t\t\t\tlen(hostDirs)-len(dones), len(hostDirs))\n\t\t\tgoto waitDones\n\t\t}\n\t}\nwaitDones:\n\tfor _, done := range dones {\n\t\tselect {\n\t\tcase <-done:\n\t\tcase <-time.After(30 * time.Second):\n\t\t\tcclog.Warn(\"[METRICSTORE]> WAL rotation completion timed out, continuing\")\n\t\t\treturn\n\t\t}\n\t}\n}\n\n// walShardIndexFromDir extracts cluster and node from a host directory path\n// and returns the shard index. The path format is: rootDir/cluster/node\nfunc walShardIndexFromDir(hostDir string) int {\n\t// hostDir = .../cluster/node — extract last two path components\n\tnode := path.Base(hostDir)\n\tcluster := path.Base(path.Dir(hostDir))\n\treturn walShardIndex(cluster, node)\n}\n\n// RotateWALFilesAfterShutdown directly removes current.wal files for the given\n// host directories. Used after shutdown, when WALStaging goroutines have already\n// exited and the channel-based RotateWALFiles is no longer safe to call.\nfunc RotateWALFilesAfterShutdown(hostDirs []string) {\n\tfor _, dir := range hostDirs {\n\t\twalPath := path.Join(dir, \"current.wal\")\n\t\tif err := os.Remove(walPath); err != nil && !os.IsNotExist(err) {\n\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: remove %s: %v\", walPath, err)\n\t\t}\n\t}\n}\n\n// writeWALRecordDirect encodes a WAL record into a contiguous buffer first,\n// then writes it to the bufio.Writer in a single call. This prevents partial\n// records in the write buffer if a write error occurs mid-record (e.g. disk full).\n// Returns the number of bytes written and any error.\nfunc writeWALRecordDirect(w *bufio.Writer, msg *WALMessage) (int, error) {\n\t// Compute payload and total record size.\n\tpayloadSize := 8 + 2 + len(msg.MetricName) + 1 + 4\n\tfor _, s := range msg.Selector {\n\t\tpayloadSize += 1 + len(s)\n\t}\n\t// Total: 8 (header) + payload + 4 (CRC).\n\ttotalSize := 8 + payloadSize + 4\n\n\t// Use stack buffer for typical small records, heap-allocate only for large ones.\n\tvar stackBuf [256]byte\n\tvar buf []byte\n\tif totalSize <= len(stackBuf) {\n\t\tbuf = stackBuf[:totalSize]\n\t} else {\n\t\tbuf = make([]byte, totalSize)\n\t}\n\n\t// Header: magic + payload length.\n\tbinary.LittleEndian.PutUint32(buf[0:4], walRecordMagic)\n\tbinary.LittleEndian.PutUint32(buf[4:8], uint32(payloadSize))\n\n\t// Payload starts at offset 8.\n\tp := 8\n\n\t// Timestamp (8 bytes).\n\tbinary.LittleEndian.PutUint64(buf[p:p+8], uint64(msg.Timestamp))\n\tp += 8\n\n\t// Metric name length (2 bytes) + metric name.\n\tbinary.LittleEndian.PutUint16(buf[p:p+2], uint16(len(msg.MetricName)))\n\tp += 2\n\tp += copy(buf[p:], msg.MetricName)\n\n\t// Selector count (1 byte).\n\tbuf[p] = byte(len(msg.Selector))\n\tp++\n\n\t// Selectors (1-byte length + bytes each).\n\tfor _, sel := range msg.Selector {\n\t\tbuf[p] = byte(len(sel))\n\t\tp++\n\t\tp += copy(buf[p:], sel)\n\t}\n\n\t// Value (4 bytes, float32 bits).\n\tbinary.LittleEndian.PutUint32(buf[p:p+4], math.Float32bits(float32(msg.Value)))\n\tp += 4\n\n\t// CRC32 over payload (bytes 8..8+payloadSize).\n\tcrc := crc32.ChecksumIEEE(buf[8 : 8+payloadSize])\n\tbinary.LittleEndian.PutUint32(buf[p:p+4], crc)\n\n\t// Single atomic write to the buffered writer.\n\tn, err := w.Write(buf)\n\treturn n, err\n}\n\n// readWALRecord reads one WAL record from the reader.\n// Returns (nil, nil) on clean EOF. Returns error on data corruption.\n// A CRC mismatch indicates a truncated trailing record (expected on crash).\nfunc readWALRecord(r io.Reader) (*WALMessage, error) {\n\tvar magic uint32\n\tif err := binary.Read(r, binary.LittleEndian, &magic); err != nil {\n\t\tif err == io.EOF {\n\t\t\treturn nil, nil // Clean EOF\n\t\t}\n\t\treturn nil, fmt.Errorf(\"read record magic: %w\", err)\n\t}\n\n\tif magic != walRecordMagic {\n\t\treturn nil, fmt.Errorf(\"invalid record magic 0x%08X (expected 0x%08X)\", magic, walRecordMagic)\n\t}\n\n\tvar payloadLen uint32\n\tif err := binary.Read(r, binary.LittleEndian, &payloadLen); err != nil {\n\t\treturn nil, fmt.Errorf(\"read payload length: %w\", err)\n\t}\n\n\tif payloadLen > 1<<20 { // 1 MB sanity limit\n\t\treturn nil, fmt.Errorf(\"record payload too large: %d bytes\", payloadLen)\n\t}\n\n\tpayload := make([]byte, payloadLen)\n\tif _, err := io.ReadFull(r, payload); err != nil {\n\t\treturn nil, fmt.Errorf(\"read payload: %w\", err)\n\t}\n\n\tvar storedCRC uint32\n\tif err := binary.Read(r, binary.LittleEndian, &storedCRC); err != nil {\n\t\treturn nil, fmt.Errorf(\"read CRC: %w\", err)\n\t}\n\n\tif crc32.ChecksumIEEE(payload) != storedCRC {\n\t\treturn nil, fmt.Errorf(\"CRC mismatch (truncated write or corruption)\")\n\t}\n\n\treturn parseWALPayload(payload)\n}\n\n// parseWALPayload decodes a binary payload into a WALMessage.\nfunc parseWALPayload(payload []byte) (*WALMessage, error) {\n\tif len(payload) < 8+2+1+4 {\n\t\treturn nil, fmt.Errorf(\"payload too short: %d bytes\", len(payload))\n\t}\n\n\toffset := 0\n\n\t// Timestamp (8 bytes)\n\tts := int64(binary.LittleEndian.Uint64(payload[offset : offset+8]))\n\toffset += 8\n\n\t// Metric name (2-byte length + bytes)\n\tif offset+2 > len(payload) {\n\t\treturn nil, fmt.Errorf(\"metric name length overflows payload\")\n\t}\n\tmLen := int(binary.LittleEndian.Uint16(payload[offset : offset+2]))\n\toffset += 2\n\n\tif offset+mLen > len(payload) {\n\t\treturn nil, fmt.Errorf(\"metric name overflows payload\")\n\t}\n\tmetricName := string(payload[offset : offset+mLen])\n\toffset += mLen\n\n\t// Selector count (1 byte)\n\tif offset >= len(payload) {\n\t\treturn nil, fmt.Errorf(\"selector count overflows payload\")\n\t}\n\tselCount := int(payload[offset])\n\toffset++\n\n\tselectors := make([]string, selCount)\n\tfor i := range selCount {\n\t\tif offset >= len(payload) {\n\t\t\treturn nil, fmt.Errorf(\"selector[%d] length overflows payload\", i)\n\t\t}\n\t\tsLen := int(payload[offset])\n\t\toffset++\n\n\t\tif offset+sLen > len(payload) {\n\t\t\treturn nil, fmt.Errorf(\"selector[%d] data overflows payload\", i)\n\t\t}\n\t\tselectors[i] = string(payload[offset : offset+sLen])\n\t\toffset += sLen\n\t}\n\n\t// Value (4 bytes, float32 bits)\n\tif offset+4 > len(payload) {\n\t\treturn nil, fmt.Errorf(\"value overflows payload\")\n\t}\n\tbits := binary.LittleEndian.Uint32(payload[offset : offset+4])\n\tvalue := schema.Float(math.Float32frombits(bits))\n\n\treturn &WALMessage{\n\t\tMetricName: metricName,\n\t\tTimestamp:  ts,\n\t\tSelector:   selectors,\n\t\tValue:      value,\n\t}, nil\n}\n\n// loadWALFile reads a WAL file and replays all valid records into the Level tree.\n// l is the host-level node. Corrupt or partial trailing records are silently skipped\n// (expected on crash). Records older than 'from' are skipped.\nfunc (l *Level) loadWALFile(m *MemoryStore, f *os.File, from int64) error {\n\tbr := bufio.NewReader(f)\n\n\t// Verify file header magic.\n\tvar fileMagic uint32\n\tif err := binary.Read(br, binary.LittleEndian, &fileMagic); err != nil {\n\t\tif err == io.EOF {\n\t\t\treturn nil // Empty file, no data\n\t\t}\n\t\treturn fmt.Errorf(\"[METRICSTORE]> WAL: read file header: %w\", err)\n\t}\n\n\tif fileMagic != walFileMagic {\n\t\treturn fmt.Errorf(\"[METRICSTORE]> WAL: invalid file magic 0x%08X (expected 0x%08X)\", fileMagic, walFileMagic)\n\t}\n\n\t// Cache level lookups to avoid repeated tree traversal.\n\tlvlCache := make(map[string]*Level)\n\n\tfor {\n\t\tmsg, err := readWALRecord(br)\n\t\tif err != nil {\n\t\t\t// Truncated trailing record is expected after a crash; stop replaying.\n\t\t\tcclog.Debugf(\"[METRICSTORE]> WAL: stopping replay at corrupted/partial record: %v\", err)\n\t\t\tbreak\n\t\t}\n\t\tif msg == nil {\n\t\t\tbreak // Clean EOF\n\t\t}\n\n\t\tif msg.Timestamp < from {\n\t\t\tcontinue // Older than retention window\n\t\t}\n\n\t\tminfo, ok := m.Metrics[msg.MetricName]\n\t\tif !ok {\n\t\t\tcontinue // Unknown metric (config may have changed)\n\t\t}\n\n\t\t// Cache key is the null-separated selector path.\n\t\tcacheKey := joinSelector(msg.Selector)\n\t\tlvl, ok := lvlCache[cacheKey]\n\t\tif !ok {\n\t\t\tlvl = l.findLevelOrCreate(msg.Selector, len(m.Metrics))\n\t\t\tlvlCache[cacheKey] = lvl\n\t\t}\n\n\t\t// Write directly to the buffer, same as WriteToLevel but without the\n\t\t// global level lookup (we already have the right level).\n\t\tlvl.lock.Lock()\n\t\tb := lvl.metrics[minfo.offset]\n\t\tif b == nil {\n\t\t\tb = newBuffer(msg.Timestamp, minfo.Frequency)\n\t\t\tlvl.metrics[minfo.offset] = b\n\t\t}\n\t\tnb, writeErr := b.write(msg.Timestamp, msg.Value)\n\t\tif writeErr == nil && b != nb {\n\t\t\tlvl.metrics[minfo.offset] = nb\n\t\t}\n\t\t// Ignore write errors for timestamps before buffer start (can happen when\n\t\t// replaying WAL entries that predate a loaded snapshot's start time).\n\t\tlvl.lock.Unlock()\n\t}\n\n\treturn nil\n}\n\n// joinSelector builds a cache key from a selector slice using null bytes as separators.\nfunc joinSelector(sel []string) string {\n\tif len(sel) == 0 {\n\t\treturn \"\"\n\t}\n\tvar result strings.Builder\n\tresult.WriteString(sel[0])\n\tfor i := 1; i < len(sel); i++ {\n\t\tresult.WriteString(\"\\x00\" + sel[i])\n\t}\n\treturn result.String()\n}\n\n// ToCheckpointWAL writes binary snapshot files for all hosts in parallel.\n// Returns the number of files written, the list of host directories that were\n// successfully checkpointed (for WAL rotation), and any errors.\nfunc (m *MemoryStore) ToCheckpointWAL(dir string, from, to int64) (int, []string, error) {\n\t// Collect all cluster/host pairs.\n\tm.root.lock.RLock()\n\ttotalHosts := 0\n\tfor _, l1 := range m.root.children {\n\t\tl1.lock.RLock()\n\t\ttotalHosts += len(l1.children)\n\t\tl1.lock.RUnlock()\n\t}\n\tm.root.lock.RUnlock()\n\n\tlevels := make([]*Level, 0, totalHosts)\n\tselectors := make([][]string, 0, totalHosts)\n\n\tm.root.lock.RLock()\n\tfor sel1, l1 := range m.root.children {\n\t\tl1.lock.RLock()\n\t\tfor sel2, l2 := range l1.children {\n\t\t\tlevels = append(levels, l2)\n\t\t\tselectors = append(selectors, []string{sel1, sel2})\n\t\t}\n\t\tl1.lock.RUnlock()\n\t}\n\tm.root.lock.RUnlock()\n\n\ttype workItem struct {\n\t\tlevel    *Level\n\t\thostDir  string\n\t\tselector []string\n\t}\n\n\ttotalWork := len(levels)\n\tcclog.Infof(\"[METRICSTORE]> Starting binary checkpoint for %d hosts with %d workers\", totalWork, Keys.NumWorkers)\n\n\tn, errs, completed := int32(0), int32(0), int32(0)\n\tvar successDirs []string\n\tvar successMu sync.Mutex\n\n\tvar wg sync.WaitGroup\n\twg.Add(Keys.NumWorkers)\n\twork := make(chan workItem, Keys.NumWorkers*2)\n\n\t// Progress logging goroutine.\n\tstopProgress := make(chan struct{})\n\tgo func() {\n\t\tticker := time.NewTicker(10 * time.Second)\n\t\tdefer ticker.Stop()\n\t\tfor {\n\t\t\tselect {\n\t\t\tcase <-ticker.C:\n\t\t\t\tcclog.Infof(\"[METRICSTORE]> Checkpoint progress: %d/%d hosts (%d written, %d errors)\",\n\t\t\t\t\tatomic.LoadInt32(&completed), totalWork, atomic.LoadInt32(&n), atomic.LoadInt32(&errs))\n\t\t\tcase <-stopProgress:\n\t\t\t\treturn\n\t\t\t}\n\t\t}\n\t}()\n\n\tfor range Keys.NumWorkers {\n\t\tgo func() {\n\t\t\tdefer wg.Done()\n\t\t\tfor wi := range work {\n\t\t\t\terr := wi.level.toCheckpointBinary(wi.hostDir, from, to, m)\n\t\t\t\tif err != nil {\n\t\t\t\t\tif err == ErrNoNewArchiveData {\n\t\t\t\t\t\tatomic.AddInt32(&completed, 1)\n\t\t\t\t\t\tcontinue\n\t\t\t\t\t}\n\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> binary checkpoint error for %s: %v\", wi.hostDir, err)\n\t\t\t\t\tatomic.AddInt32(&errs, 1)\n\t\t\t\t} else {\n\t\t\t\t\tatomic.AddInt32(&n, 1)\n\t\t\t\t\tsuccessMu.Lock()\n\t\t\t\t\tsuccessDirs = append(successDirs, wi.hostDir)\n\t\t\t\t\tsuccessMu.Unlock()\n\t\t\t\t}\n\t\t\t\tatomic.AddInt32(&completed, 1)\n\t\t\t}\n\t\t}()\n\t}\n\n\tfor i := range levels {\n\t\thostDir := path.Join(dir, path.Join(selectors[i]...))\n\t\twork <- workItem{\n\t\t\tlevel:    levels[i],\n\t\t\thostDir:  hostDir,\n\t\t\tselector: selectors[i],\n\t\t}\n\t}\n\tclose(work)\n\twg.Wait()\n\tclose(stopProgress)\n\n\tif errs > 0 {\n\t\treturn int(n), successDirs, fmt.Errorf(\"[METRICSTORE]> %d errors during binary checkpoint (%d successes)\", errs, n)\n\t}\n\treturn int(n), successDirs, nil\n}\n\n// toCheckpointBinary writes a binary snapshot file for a single host-level node.\n// Uses atomic rename (write to .tmp then rename) to avoid partial reads on crash.\nfunc (l *Level) toCheckpointBinary(dir string, from, to int64, m *MemoryStore) error {\n\tcf, err := l.toCheckpointFile(from, to, m)\n\tif err != nil {\n\t\treturn err\n\t}\n\tif cf == nil {\n\t\treturn ErrNoNewArchiveData\n\t}\n\n\tif err := os.MkdirAll(dir, CheckpointDirPerms); err != nil {\n\t\treturn fmt.Errorf(\"mkdir %s: %w\", dir, err)\n\t}\n\n\t// Write to a temp file first, then rename (atomic on POSIX).\n\ttmpPath := path.Join(dir, fmt.Sprintf(\"%d.bin.tmp\", from))\n\tfinalPath := path.Join(dir, fmt.Sprintf(\"%d.bin\", from))\n\n\tf, err := os.OpenFile(tmpPath, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, CheckpointFilePerms)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"open binary snapshot %s: %w\", tmpPath, err)\n\t}\n\n\tbw := bufio.NewWriter(f)\n\tif err := writeBinarySnapshotFile(bw, cf); err != nil {\n\t\tf.Close()\n\t\tos.Remove(tmpPath)\n\t\treturn fmt.Errorf(\"write binary snapshot: %w\", err)\n\t}\n\tif err := bw.Flush(); err != nil {\n\t\tf.Close()\n\t\tos.Remove(tmpPath)\n\t\treturn err\n\t}\n\tf.Close()\n\n\treturn os.Rename(tmpPath, finalPath)\n}\n\n// writeBinarySnapshotFile writes the binary snapshot file header and level tree.\nfunc writeBinarySnapshotFile(w io.Writer, cf *CheckpointFile) error {\n\tif err := binary.Write(w, binary.LittleEndian, snapFileMagic); err != nil {\n\t\treturn err\n\t}\n\tif err := binary.Write(w, binary.LittleEndian, cf.From); err != nil {\n\t\treturn err\n\t}\n\tif err := binary.Write(w, binary.LittleEndian, cf.To); err != nil {\n\t\treturn err\n\t}\n\treturn writeBinaryLevel(w, cf)\n}\n\n// writeBinaryLevel recursively writes a CheckpointFile level in binary format.\nfunc writeBinaryLevel(w io.Writer, cf *CheckpointFile) error {\n\tif err := binary.Write(w, binary.LittleEndian, uint32(len(cf.Metrics))); err != nil {\n\t\treturn err\n\t}\n\n\tfor name, metric := range cf.Metrics {\n\t\tif err := writeString16(w, name); err != nil {\n\t\t\treturn err\n\t\t}\n\t\tif err := binary.Write(w, binary.LittleEndian, metric.Frequency); err != nil {\n\t\t\treturn err\n\t\t}\n\t\tif err := binary.Write(w, binary.LittleEndian, metric.Start); err != nil {\n\t\t\treturn err\n\t\t}\n\t\tif err := binary.Write(w, binary.LittleEndian, uint32(len(metric.Data))); err != nil {\n\t\t\treturn err\n\t\t}\n\t\tfor _, v := range metric.Data {\n\t\t\tif err := binary.Write(w, binary.LittleEndian, math.Float32bits(float32(v))); err != nil {\n\t\t\t\treturn err\n\t\t\t}\n\t\t}\n\t}\n\n\tif err := binary.Write(w, binary.LittleEndian, uint32(len(cf.Children))); err != nil {\n\t\treturn err\n\t}\n\n\tfor name, child := range cf.Children {\n\t\tif err := writeString16(w, name); err != nil {\n\t\t\treturn err\n\t\t}\n\t\tif err := writeBinaryLevel(w, child); err != nil {\n\t\t\treturn err\n\t\t}\n\t}\n\n\treturn nil\n}\n\n// writeString16 writes a 2-byte length-prefixed string to w.\nfunc writeString16(w io.Writer, s string) error {\n\tif err := binary.Write(w, binary.LittleEndian, uint16(len(s))); err != nil {\n\t\treturn err\n\t}\n\t_, err := io.WriteString(w, s)\n\treturn err\n}\n\n// loadBinaryFile reads a binary snapshot file and loads data into the Level tree.\n// The retention check (from) is applied to the file's 'to' timestamp.\nfunc (l *Level) loadBinaryFile(m *MemoryStore, f *os.File, from int64) error {\n\tbr := bufio.NewReader(f)\n\n\tvar magic uint32\n\tif err := binary.Read(br, binary.LittleEndian, &magic); err != nil {\n\t\treturn fmt.Errorf(\"[METRICSTORE]> binary snapshot: read magic: %w\", err)\n\t}\n\tif magic != snapFileMagic {\n\t\treturn fmt.Errorf(\"[METRICSTORE]> binary snapshot: invalid magic 0x%08X (expected 0x%08X)\", magic, snapFileMagic)\n\t}\n\n\tvar fileFrom, fileTo int64\n\tif err := binary.Read(br, binary.LittleEndian, &fileFrom); err != nil {\n\t\treturn fmt.Errorf(\"[METRICSTORE]> binary snapshot: read from: %w\", err)\n\t}\n\tif err := binary.Read(br, binary.LittleEndian, &fileTo); err != nil {\n\t\treturn fmt.Errorf(\"[METRICSTORE]> binary snapshot: read to: %w\", err)\n\t}\n\n\tif fileTo != 0 && fileTo < from {\n\t\treturn nil // File is older than retention window, skip it\n\t}\n\n\tcf, err := readBinaryLevel(br)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"[METRICSTORE]> binary snapshot: read level tree: %w\", err)\n\t}\n\tcf.From = fileFrom\n\tcf.To = fileTo\n\n\treturn l.loadFile(cf, m)\n}\n\n// readBinaryLevel recursively reads a level from the binary snapshot format.\nfunc readBinaryLevel(r io.Reader) (*CheckpointFile, error) {\n\tcf := &CheckpointFile{\n\t\tMetrics:  make(map[string]*CheckpointMetrics),\n\t\tChildren: make(map[string]*CheckpointFile),\n\t}\n\n\tvar numMetrics uint32\n\tif err := binary.Read(r, binary.LittleEndian, &numMetrics); err != nil {\n\t\treturn nil, fmt.Errorf(\"read num_metrics: %w\", err)\n\t}\n\n\tfor range numMetrics {\n\t\tname, err := readString16(r)\n\t\tif err != nil {\n\t\t\treturn nil, fmt.Errorf(\"read metric name: %w\", err)\n\t\t}\n\n\t\tvar freq, start int64\n\t\tif err := binary.Read(r, binary.LittleEndian, &freq); err != nil {\n\t\t\treturn nil, fmt.Errorf(\"read frequency for %s: %w\", name, err)\n\t\t}\n\t\tif err := binary.Read(r, binary.LittleEndian, &start); err != nil {\n\t\t\treturn nil, fmt.Errorf(\"read start for %s: %w\", name, err)\n\t\t}\n\n\t\tvar numValues uint32\n\t\tif err := binary.Read(r, binary.LittleEndian, &numValues); err != nil {\n\t\t\treturn nil, fmt.Errorf(\"read num_values for %s: %w\", name, err)\n\t\t}\n\n\t\tdata := make([]schema.Float, numValues)\n\t\tfor i := range numValues {\n\t\t\tvar bits uint32\n\t\t\tif err := binary.Read(r, binary.LittleEndian, &bits); err != nil {\n\t\t\t\treturn nil, fmt.Errorf(\"read value[%d] for %s: %w\", i, name, err)\n\t\t\t}\n\t\t\tdata[i] = schema.Float(math.Float32frombits(bits))\n\t\t}\n\n\t\tcf.Metrics[name] = &CheckpointMetrics{\n\t\t\tFrequency: freq,\n\t\t\tStart:     start,\n\t\t\tData:      data,\n\t\t}\n\t}\n\n\tvar numChildren uint32\n\tif err := binary.Read(r, binary.LittleEndian, &numChildren); err != nil {\n\t\treturn nil, fmt.Errorf(\"read num_children: %w\", err)\n\t}\n\n\tfor range numChildren {\n\t\tchildName, err := readString16(r)\n\t\tif err != nil {\n\t\t\treturn nil, fmt.Errorf(\"read child name: %w\", err)\n\t\t}\n\n\t\tchild, err := readBinaryLevel(r)\n\t\tif err != nil {\n\t\t\treturn nil, fmt.Errorf(\"read child %s: %w\", childName, err)\n\t\t}\n\t\tcf.Children[childName] = child\n\t}\n\n\treturn cf, nil\n}\n\n// readString16 reads a 2-byte length-prefixed string from r.\nfunc readString16(r io.Reader) (string, error) {\n\tvar sLen uint16\n\tif err := binary.Read(r, binary.LittleEndian, &sLen); err != nil {\n\t\treturn \"\", err\n\t}\n\tbuf := make([]byte, sLen)\n\tif _, err := io.ReadFull(r, buf); err != nil {\n\t\treturn \"\", err\n\t}\n\treturn string(buf), nil\n}\n","numLines":986,"startLine":1,"totalLines":986}},"sourceToolAssistantUUID":"3c6b71b5-d8b6-4661-9c49-083966474dee","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"type":"last-prompt","lastPrompt":"This application uses a files based checkpointing mechanism using a WAL algorithm for crash recovery. Analyse when the wal files are reset. Currently the wal files are not reset and continously grow a…","leafUuid":"92de2e37-9e08-4b6f-abeb-94f747359225","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63"}
+{"type":"ai-title","aiTitle":"Analyze WAL file reset mechanism in checkpoint system","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63"}
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This file is part of cc-backend.\n3\t// Use of this source code is governed by a MIT-style\n4\t// license that can be found in the LICENSE file.\n5\t\n6\t// Package metricstore provides an efficient in-memory time-series metric storage system\n7\t// with support for hierarchical data organization, checkpointing, and archiving.\n8\t//\n9\t// The package organizes metrics in a tree structure (cluster → host → component) and\n10\t// provides concurrent read/write access to metric data with configurable aggregation strategies.\n11\t// Background goroutines handle periodic checkpointing (JSON or WAL/binary format), archiving old data,\n12\t// and enforcing retention policies.\n13\t//\n14\t// Key features:\n15\t//   - In-memory metric storage with configurable retention\n16\t//   - Hierarchical data organization (selectors)\n17\t//   - Concurrent checkpoint/archive workers\n18\t//   - Support for sum and average aggregation\n19\t//   - NATS integration for metric ingestion via InfluxDB line protocol\n20\tpackage metricstore\n21\t\n22\timport (\n23\t\t\"bytes\"\n24\t\t\"context\"\n25\t\t\"encoding/json\"\n26\t\t\"errors\"\n27\t\t\"fmt\"\n28\t\t\"runtime\"\n29\t\t\"runtime/debug\"\n30\t\t\"slices\"\n31\t\t\"sync\"\n32\t\t\"time\"\n33\t\n34\t\t\"github.com/ClusterCockpit/cc-backend/internal/config\"\n35\t\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n36\t\t\"github.com/ClusterCockpit/cc-lib/v2/resampler\"\n37\t\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n38\t\t\"github.com/ClusterCockpit/cc-lib/v2/util\"\n39\t)\n40\t\n41\t// GlobalState holds the global state for the metric store with thread-safe access.\n42\ttype GlobalState struct {\n43\t\tmu                sync.RWMutex\n44\t\tlastRetentionTime int64\n45\t\tselectorsExcluded bool\n46\t}\n47\t\n48\tvar (\n49\t\tsingleton  sync.Once\n50\t\tmsInstance *MemoryStore\n51\t\t// shutdownFunc stores the context cancellation function created in Init\n52\t\t// and is called during Shutdown to cancel all background goroutines\n53\t\tshutdownFunc   context.CancelFunc\n54\t\tshutdownFuncMu sync.Mutex // Protects shutdownFunc from concurrent access\n55\t\t// Create a global instance\n56\t\tstate = &GlobalState{}\n57\t)\n58\t\n59\t// NodeProvider provides information about nodes currently in use by running jobs.\n60\t//\n61\t// This interface allows metricstore to query job information without directly\n62\t// depending on the repository package, breaking the import cycle.\n63\t//\n64\t// Implementations should return nodes that are actively processing jobs started\n65\t// before the given timestamp. These nodes will be excluded from retention-based\n66\t// garbage collection to prevent data loss for jobs that are still running or\n67\t// recently completed.\n68\ttype NodeProvider interface {\n69\t\t// GetUsedNodes returns a map of cluster names to sorted lists of unique hostnames\n70\t\t// that are currently in use by jobs that started before the given timestamp.\n71\t\t//\n72\t\t// Parameters:\n73\t\t//   - ts: Unix timestamp threshold - returns nodes with jobs started before this time\n74\t\t//\n75\t\t// Returns:\n76\t\t//   - Map of cluster names to lists of node hostnames that should be excluded from garbage collection\n77\t\t//   - Error if the query fails\n78\t\tGetUsedNodes(ts int64) (map[string][]string, error)\n79\t}\n80\t\n81\t// Metric represents a single metric data point to be written to the store.\n82\ttype Metric struct {\n83\t\tName  string\n84\t\tValue schema.Float\n85\t\t// MetricConfig contains frequency and aggregation settings for this metric.\n86\t\t// If Frequency is 0, configuration will be looked up from MemoryStore.Metrics during Write().\n87\t\tMetricConfig MetricConfig\n88\t}\n89\t\n90\t// MemoryStore is the main in-memory time-series metric storage implementation.\n91\t//\n92\t// It organizes metrics in a hierarchical tree structure where each level represents\n93\t// a component of the system hierarchy (e.g., cluster → host → CPU). Each level can\n94\t// store multiple metrics as time-series buffers.\n95\t//\n96\t// The store is initialized as a singleton via InitMetrics() and accessed via GetMemoryStore().\n97\t// All public methods are safe for concurrent use.\n98\ttype MemoryStore struct {\n99\t\tMetrics      map[string]MetricConfig\n100\t\troot         Level\n101\t\tnodeProvider NodeProvider\n102\t}\n103\t\n104\t// Init initializes the metric store from configuration and starts background workers.\n105\t//\n106\t// This function must be called exactly once before any other metricstore operations.\n107\t// It performs the following initialization steps:\n108\t//  1. Validates and decodes the metric store configuration\n109\t//  2. Configures worker pool size (defaults to NumCPU/2+1, max 10)\n110\t//  3. Loads metric configurations from all registered clusters\n111\t//  4. Restores checkpoints within the retention window\n112\t//  5. Starts background workers for retention, checkpointing, archiving, and monitoring\n113\t//  6. Optionally subscribes to NATS for real-time metric ingestion\n114\t//\n115\t// Parameters:\n116\t//   - rawConfig: JSON configuration for the metric store (see MetricStoreConfig); may be nil to use defaults\n117\t//   - metrics: Map of metric names to their configurations (frequency and aggregation strategy)\n118\t//   - wg: WaitGroup that will be incremented for each background goroutine started\n119\t//\n120\t// The function will call cclog.Fatal on critical errors during initialization.\n121\t// Use Shutdown() to cleanly stop all background workers started by Init().\n122\t//\n123\t// Note: Signal handling must be implemented by the caller. Call Shutdown() when\n124\t// receiving termination signals to ensure checkpoint data is persisted.\n125\tfunc Init(rawConfig json.RawMessage, metrics map[string]MetricConfig, wg *sync.WaitGroup) {\n126\t\tstartupTime := time.Now()\n127\t\n128\t\tif rawConfig != nil {\n129\t\t\tconfig.Validate(configSchema, rawConfig)\n130\t\t\tdec := json.NewDecoder(bytes.NewReader(rawConfig))\n131\t\t\tdec.DisallowUnknownFields()\n132\t\t\tif err := dec.Decode(&Keys); err != nil {\n133\t\t\t\tcclog.Abortf(\"[METRICSTORE]> Metric Store Config Init: Could not decode config file '%s'.\\nError: %s\\n\", rawConfig, err.Error())\n134\t\t\t}\n135\t\t}\n136\t\n137\t\t// Set NumWorkers from config or use default\n138\t\tif Keys.NumWorkers <= 0 {\n139\t\t\tKeys.NumWorkers = min(runtime.NumCPU()/2+1, DefaultMaxWorkers)\n140\t\t}\n141\t\tcclog.Debugf(\"[METRICSTORE]> Using %d workers for checkpoint/archive operations\\n\", Keys.NumWorkers)\n142\t\n143\t\t// Pass the config.MetricStoreKeys\n144\t\tInitMetrics(metrics)\n145\t\n146\t\tms := GetMemoryStore()\n147\t\n148\t\td, err := time.ParseDuration(Keys.RetentionInMemory)\n149\t\tif err != nil {\n150\t\t\tcclog.Fatal(err)\n151\t\t}\n152\t\n153\t\trestoreFrom := startupTime.Add(-d)\n154\t\tcclog.Infof(\"[METRICSTORE]> Loading checkpoints newer than %s\\n\", restoreFrom.Format(time.RFC3339))\n155\t\tfiles, err := ms.FromCheckpointFiles(Keys.Checkpoints.RootDir, restoreFrom.Unix())\n156\t\tloadedData := ms.SizeInBytes() / 1024 / 1024 // In MB\n157\t\tif err != nil {\n158\t\t\tcclog.Fatalf(\"[METRICSTORE]> Loading checkpoints failed: %s\\n\", err.Error())\n159\t\t} else {\n160\t\t\tcclog.Infof(\"[METRICSTORE]> Checkpoints loaded (%d files, %d MB, that took %fs)\\n\", files, loadedData, time.Since(startupTime).Seconds())\n161\t\t}\n162\t\n163\t\t// Try to use less memory by forcing a GC run here and then\n164\t\t// lowering the target percentage. The default of 100 means\n165\t\t// that only once the ratio of new allocations execeds the\n166\t\t// previously active heap, a GC is triggered.\n167\t\t// Forcing a GC here will set the \"previously active heap\"\n168\t\t// to a minumum.\n169\t\t// runtime.GC()\n170\t\n171\t\tctx, shutdown := context.WithCancel(context.Background())\n172\t\n173\t\tRetention(wg, ctx)\n174\t\tCheckpointing(wg, ctx)\n175\t\tCleanUp(wg, ctx)\n176\t\tWALStaging(wg, ctx)\n177\t\tMemoryUsageTracker(wg, ctx)\n178\t\n179\t\t// Note: Signal handling has been removed from this function.\n180\t\t// The caller is responsible for handling shutdown signals and calling\n181\t\t// the shutdown() function when appropriate.\n182\t\t// Store the shutdown function for later use by Shutdown()\n183\t\tshutdownFuncMu.Lock()\n184\t\tshutdownFunc = shutdown\n185\t\tshutdownFuncMu.Unlock()\n186\t\n187\t\tif Keys.Subscriptions != nil {\n188\t\t\twg.Go(func() {\n189\t\t\t\tif err := ReceiveNats(ms, Keys.NumWorkers, ctx); err != nil {\n190\t\t\t\t\tcclog.Fatal(err)\n191\t\t\t\t}\n192\t\t\t})\n193\t\t}\n194\t}\n195\t\n196\t// InitMetrics initializes the singleton MemoryStore instance with the given metric configurations.\n197\t//\n198\t// This function must be called before GetMemoryStore() and can only be called once due to\n199\t// the singleton pattern. It assigns each metric an internal offset for efficient buffer indexing.\n200\t//\n201\t// Parameters:\n202\t//   - metrics: Map of metric names to their configurations (frequency and aggregation strategy)\n203\t//\n204\t// Panics if any metric has Frequency == 0, which indicates an invalid configuration.\n205\t//\n206\t// After this call, the global msInstance is ready for use via GetMemoryStore().\n207\tfunc InitMetrics(metrics map[string]MetricConfig) {\n208\t\tsingleton.Do(func() {\n209\t\t\toffset := 0\n210\t\t\tfor key, cfg := range metrics {\n211\t\t\t\tif cfg.Frequency == 0 {\n212\t\t\t\t\tpanic(\"[METRICSTORE]> invalid frequency\")\n213\t\t\t\t}\n214\t\n215\t\t\t\tmetrics[key] = MetricConfig{\n216\t\t\t\t\tFrequency:   cfg.Frequency,\n217\t\t\t\t\tAggregation: cfg.Aggregation,\n218\t\t\t\t\toffset:      offset,\n219\t\t\t\t}\n220\t\t\t\toffset += 1\n221\t\t\t}\n222\t\n223\t\t\tmsInstance = &MemoryStore{\n224\t\t\t\troot: Level{\n225\t\t\t\t\tmetrics:  make([]*buffer, len(metrics)),\n226\t\t\t\t\tchildren: make(map[string]*Level),\n227\t\t\t\t},\n228\t\t\t\tMetrics: metrics,\n229\t\t\t}\n230\t\t})\n231\t}\n232\t\n233\t// GetMemoryStore returns the singleton MemoryStore instance.\n234\t//\n235\t// Returns the initialized MemoryStore singleton. Calls cclog.Fatal if InitMetrics() was not called first.\n236\t//\n237\t// This function is safe for concurrent use after initialization.\n238\tfunc GetMemoryStore() *MemoryStore {\n239\t\tif msInstance == nil {\n240\t\t\tcclog.Warnf(\"[METRICSTORE]> MemoryStore not initialized!\")\n241\t\t}\n242\t\n243\t\treturn msInstance\n244\t}\n245\t\n246\tfunc (ms *MemoryStore) GetMetricFrequency(metricName string) (int64, error) {\n247\t\tif metric, ok := ms.Metrics[metricName]; ok {\n248\t\t\treturn metric.Frequency, nil\n249\t\t}\n250\t\treturn 0, fmt.Errorf(\"[METRICSTORE]> metric %s not found\", metricName)\n251\t}\n252\t\n253\t// SetNodeProvider sets the NodeProvider implementation for the MemoryStore.\n254\t// This must be called during initialization to provide job state information\n255\t// for selective buffer retention during Free operations.\n256\t// If not set, the Free function will fall back to freeing all buffers.\n257\tfunc (ms *MemoryStore) SetNodeProvider(provider NodeProvider) {\n258\t\tms.nodeProvider = provider\n259\t}\n260\t\n261\t// Shutdown performs a graceful shutdown of the metric store.\n262\t//\n263\t// This function cancels all background goroutines started by Init() and writes\n264\t// a final checkpoint to disk before returning. It should be called when the\n265\t// application receives a termination signal.\n266\t//\n267\t// The function will:\n268\t//  1. Cancel the context to stop all background workers\n269\t//  2. Close the WAL messages channel if using WAL format\n270\t//  3. Write a final checkpoint to preserve in-memory data\n271\t//  4. Log any errors encountered during shutdown\n272\t//\n273\t// Note: This function blocks until the final checkpoint is written.\n274\tfunc Shutdown() {\n275\t\ttotalStart := time.Now()\n276\t\n277\t\tshutdownFuncMu.Lock()\n278\t\tdefer shutdownFuncMu.Unlock()\n279\t\tif shutdownFunc != nil {\n280\t\t\tshutdownFunc()\n281\t\t}\n282\t\tcclog.Infof(\"[METRICSTORE]> Background workers cancelled (%v)\", time.Since(totalStart))\n283\t\n284\t\tif Keys.Checkpoints.FileFormat == \"wal\" {\n285\t\t\t// Signal producers to stop sending before closing channels,\n286\t\t\t// preventing send-on-closed-channel panics from in-flight NATS workers.\n287\t\t\twalShuttingDown.Store(true)\n288\t\t\t// Brief grace period for in-flight DecodeLine calls to complete.\n289\t\t\ttime.Sleep(100 * time.Millisecond)\n290\t\n291\t\t\tfor _, ch := range walShardChs {\n292\t\t\t\tclose(ch)\n293\t\t\t}\n294\t\t\tdrainStart := time.Now()\n295\t\t\tWaitForWALStagingDrain()\n296\t\t\tcclog.Infof(\"[METRICSTORE]> WAL staging goroutines exited (%v)\", time.Since(drainStart))\n297\t\t}\n298\t\n299\t\tcclog.Infof(\"[METRICSTORE]> Writing checkpoint to '%s'...\", Keys.Checkpoints.RootDir)\n300\t\tcheckpointStart := time.Now()\n301\t\tvar files int\n302\t\tvar err error\n303\t\n304\t\tms := GetMemoryStore()\n305\t\n306\t\tlastCheckpointMu.Lock()\n307\t\tfrom := lastCheckpoint\n308\t\tlastCheckpointMu.Unlock()\n309\t\n310\t\tif Keys.Checkpoints.FileFormat == \"wal\" {\n311\t\t\t// WAL files are deleted per-host inside ToCheckpointWAL workers.\n312\t\t\tfiles, _, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n313\t\t} else {\n314\t\t\tfiles, err = ms.ToCheckpoint(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n315\t\t}\n316\t\n317\t\tif err != nil {\n318\t\t\tcclog.Errorf(\"[METRICSTORE]> Writing checkpoint failed: %s\", err.Error())\n319\t\t}\n320\t\tcclog.Infof(\"[METRICSTORE]> Done! (%d files written in %v, total shutdown: %v)\", files, time.Since(checkpointStart), time.Since(totalStart))\n321\t}\n322\t\n323\t// Retention starts a background goroutine that periodically frees old metric data.\n324\t//\n325\t// This worker runs at half the retention interval and calls Free() to remove buffers\n326\t// older than the configured retention time. It respects the NodeProvider to preserve\n327\t// data for nodes with active jobs.\n328\t//\n329\t// Parameters:\n330\t//   - wg: WaitGroup to signal completion when context is cancelled\n331\t//   - ctx: Context for cancellation signal\n332\t//\n333\t// The goroutine exits when ctx is cancelled.\n334\tfunc Retention(wg *sync.WaitGroup, ctx context.Context) {\n335\t\tms := GetMemoryStore()\n336\t\n337\t\twg.Go(func() {\n338\t\t\td, err := time.ParseDuration(Keys.RetentionInMemory)\n339\t\t\tif err != nil {\n340\t\t\t\tcclog.Fatal(err)\n341\t\t\t}\n342\t\t\tif d <= 0 {\n343\t\t\t\treturn\n344\t\t\t}\n345\t\n346\t\t\ttickInterval := d / 2\n347\t\t\tif tickInterval <= 0 {\n348\t\t\t\treturn\n349\t\t\t}\n350\t\t\tticker := time.NewTicker(tickInterval)\n351\t\t\tdefer ticker.Stop()\n352\t\n353\t\t\tfor {\n354\t\t\t\tselect {\n355\t\t\t\tcase <-ctx.Done():\n356\t\t\t\t\treturn\n357\t\t\t\tcase <-ticker.C:\n358\t\t\t\t\tstate.mu.Lock()\n359\t\n360\t\t\t\t\tt := time.Now().Add(-d)\n361\t\n362\t\t\t\t\tstate.lastRetentionTime = t.Unix()\n363\t\n364\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> start freeing buffers (older than %s)...\\n\", t.Format(time.RFC3339))\n365\t\n366\t\t\t\t\tfreed, err := Free(ms, t)\n367\t\t\t\t\tif err != nil {\n368\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> freeing up buffers failed: %s\\n\", err.Error())\n369\t\t\t\t\t} else {\n370\t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> done: %d buffers freed\\n\", freed)\n371\t\t\t\t\t}\n372\t\n373\t\t\t\t\tstate.mu.Unlock()\n374\t\n375\t\t\t\t\t// Clean up the buffer pool\n376\t\t\t\t\tbufferPool.Clean(state.lastRetentionTime)\n377\t\t\t\t}\n378\t\t\t}\n379\t\t})\n380\t}\n381\t\n382\t// MemoryUsageTracker starts a background goroutine that monitors memory usage.\n383\t//\n384\t// This worker checks actual process memory usage (via runtime.MemStats) periodically\n385\t// and force-frees buffers if memory exceeds the configured cap. It uses FreeOSMemory()\n386\t// to return memory to the OS after freeing buffers, avoiding aggressive GC that causes\n387\t// performance issues.\n388\t//\n389\t// The tracker logs both actual memory usage (heap allocated) and metric data size for\n390\t// visibility into memory overhead from Go runtime structures and allocations.\n391\t//\n392\t// Parameters:\n393\t//   - wg: WaitGroup to signal completion when context is cancelled\n394\t//   - ctx: Context for cancellation signal\n395\t//\n396\t// The goroutine exits when ctx is cancelled.\n397\tfunc MemoryUsageTracker(wg *sync.WaitGroup, ctx context.Context) {\n398\t\tms := GetMemoryStore()\n399\t\n400\t\twg.Go(func() {\n401\t\t\tnormalInterval := DefaultMemoryUsageTrackerInterval\n402\t\t\tfastInterval := 30 * time.Second\n403\t\n404\t\t\tif normalInterval <= 0 {\n405\t\t\t\treturn\n406\t\t\t}\n407\t\n408\t\t\tticker := time.NewTicker(normalInterval)\n409\t\t\tdefer ticker.Stop()\n410\t\t\tcurrentInterval := normalInterval\n411\t\n412\t\t\tfor {\n413\t\t\t\tselect {\n414\t\t\t\tcase <-ctx.Done():\n415\t\t\t\t\treturn\n416\t\t\t\tcase <-ticker.C:\n417\t\t\t\t\tvar mem runtime.MemStats\n418\t\t\t\t\truntime.ReadMemStats(&mem)\n419\t\t\t\t\tactualMemoryGB := float64(mem.Alloc) / 1e9\n420\t\t\t\t\tmetricDataGB := ms.SizeInGB()\n421\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> memory usage: %.2f GB actual (%.2f GB metric data)\", actualMemoryGB, metricDataGB)\n422\t\n423\t\t\t\t\tfreedExcluded := 0\n424\t\t\t\t\tfreedEmergency := 0\n425\t\t\t\t\tvar err error\n426\t\n427\t\t\t\t\tstate.mu.RLock()\n428\t\t\t\t\tlastRetention := state.lastRetentionTime\n429\t\t\t\t\tselectorsExcluded := state.selectorsExcluded\n430\t\t\t\t\tstate.mu.RUnlock()\n431\t\n432\t\t\t\t\tif lastRetention != 0 && selectorsExcluded {\n433\t\t\t\t\t\tfreedExcluded, err = ms.Free(nil, lastRetention)\n434\t\t\t\t\t\tif err != nil {\n435\t\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> error while force-freeing the excluded buffers: %s\", err)\n436\t\t\t\t\t\t}\n437\t\n438\t\t\t\t\t\tif freedExcluded > 0 {\n439\t\t\t\t\t\t\tdebug.FreeOSMemory()\n440\t\t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> done: %d excluded buffers force-freed\", freedExcluded)\n441\t\t\t\t\t\t}\n442\t\t\t\t\t}\n443\t\n444\t\t\t\t\truntime.ReadMemStats(&mem)\n445\t\t\t\t\tactualMemoryGB = float64(mem.Alloc) / 1e9\n446\t\n447\t\t\t\t\tif actualMemoryGB > float64(Keys.MemoryCap) {\n448\t\t\t\t\t\tcclog.Warnf(\"[METRICSTORE]> memory usage %.2f GB exceeds cap %d GB, starting emergency buffer freeing\", actualMemoryGB, Keys.MemoryCap)\n449\t\n450\t\t\t\t\t\t// Use progressive time-based Free with increasing threshold\n451\t\t\t\t\t\t// instead of ForceFree loop — fewer tree traversals, more effective\n452\t\t\t\t\t\td, parseErr := time.ParseDuration(Keys.RetentionInMemory)\n453\t\t\t\t\t\tif parseErr != nil {\n454\t\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> cannot parse retention duration: %s\", parseErr)\n455\t\t\t\t\t\t} else {\n456\t\t\t\t\t\t\tthresholds := []float64{0.75, 0.5, 0.25}\n457\t\t\t\t\t\t\tfor _, fraction := range thresholds {\n458\t\t\t\t\t\t\t\tthreshold := time.Now().Add(-time.Duration(float64(d) * fraction))\n459\t\t\t\t\t\t\t\tfreed, freeErr := ms.Free(nil, threshold.Unix())\n460\t\t\t\t\t\t\t\tif freeErr != nil {\n461\t\t\t\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> error while freeing buffers at %.0f%% retention: %s\", fraction*100, freeErr)\n462\t\t\t\t\t\t\t\t}\n463\t\t\t\t\t\t\t\tfreedEmergency += freed\n464\t\n465\t\t\t\t\t\t\t\tbufferPool.Clear()\n466\t\t\t\t\t\t\t\truntime.GC()\n467\t\t\t\t\t\t\t\truntime.ReadMemStats(&mem)\n468\t\t\t\t\t\t\t\tactualMemoryGB = float64(mem.Alloc) / 1e9\n469\t\n470\t\t\t\t\t\t\t\tif actualMemoryGB < float64(Keys.MemoryCap) {\n471\t\t\t\t\t\t\t\t\tbreak\n472\t\t\t\t\t\t\t\t}\n473\t\t\t\t\t\t\t}\n474\t\t\t\t\t\t}\n475\t\n476\t\t\t\t\t\tbufferPool.Clear()\n477\t\t\t\t\t\tdebug.FreeOSMemory()\n478\t\n479\t\t\t\t\t\truntime.ReadMemStats(&mem)\n480\t\t\t\t\t\tactualMemoryGB = float64(mem.Alloc) / 1e9\n481\t\n482\t\t\t\t\t\tif actualMemoryGB >= float64(Keys.MemoryCap) {\n483\t\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> after emergency frees (%d buffers), memory usage %.2f GB still at/above cap %d GB\", freedEmergency, actualMemoryGB, Keys.MemoryCap)\n484\t\t\t\t\t\t} else {\n485\t\t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> emergency freeing complete: %d buffers freed, memory now %.2f GB\", freedEmergency, actualMemoryGB)\n486\t\t\t\t\t\t}\n487\t\t\t\t\t}\n488\t\n489\t\t\t\t\t// Adaptive ticker: check more frequently when memory is high\n490\t\t\t\t\tmemoryRatio := actualMemoryGB / float64(Keys.MemoryCap)\n491\t\t\t\t\tif memoryRatio > 0.8 && currentInterval != fastInterval {\n492\t\t\t\t\t\tticker.Reset(fastInterval)\n493\t\t\t\t\t\tcurrentInterval = fastInterval\n494\t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> memory at %.0f%% of cap, switching to fast check interval (30s)\", memoryRatio*100)\n495\t\t\t\t\t} else if memoryRatio <= 0.8 && currentInterval != normalInterval {\n496\t\t\t\t\t\tticker.Reset(normalInterval)\n497\t\t\t\t\t\tcurrentInterval = normalInterval\n498\t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> memory at %.0f%% of cap, switching to normal check interval\", memoryRatio*100)\n499\t\t\t\t\t}\n500\t\t\t\t}\n501\t\t\t}\n502\t\t})\n503\t}\n504\t\n505\t// Free removes metric data older than the given time while preserving data for active nodes.\n506\t//\n507\t// This function implements intelligent retention by consulting the NodeProvider (if configured)\n508\t// to determine which nodes are currently in use by running jobs. Data for these nodes is\n509\t// preserved even if older than the retention time.\n510\t//\n511\t// Parameters:\n512\t//   - ms: The MemoryStore instance\n513\t//   - t: Time threshold - buffers with data older than this will be freed\n514\t//\n515\t// Returns:\n516\t//   - Number of buffers freed\n517\t//   - Error if NodeProvider query fails\n518\t//\n519\t// Behavior:\n520\t//   - If no NodeProvider is set: frees all buffers older than t\n521\t//   - If NodeProvider returns empty map: frees all buffers older than t\n522\t//   - Otherwise: preserves buffers for nodes returned by GetUsedNodes(), frees others\n523\tfunc Free(ms *MemoryStore, t time.Time) (int, error) {\n524\t\t// If no NodeProvider is configured, free all buffers older than t\n525\t\tif ms.nodeProvider == nil {\n526\t\t\treturn ms.Free(nil, t.Unix())\n527\t\t}\n528\t\n529\t\texcludeSelectors, err := ms.nodeProvider.GetUsedNodes(t.Unix())\n530\t\tif err != nil {\n531\t\t\treturn 0, err\n532\t\t}\n533\t\n534\t\tswitch lenMap := len(excludeSelectors); lenMap {\n535\t\n536\t\t// If the length of the map returned by GetUsedNodes() is 0,\n537\t\t// then use default Free method with nil selector\n538\t\tcase 0:\n539\t\t\tstate.selectorsExcluded = false\n540\t\t\treturn ms.Free(nil, t.Unix())\n541\t\n542\t\t// Else formulate selectors, exclude those from the map\n543\t\t// and free the rest of the selectors\n544\t\tdefault:\n545\t\t\tstate.selectorsExcluded = true\n546\t\t\tselectors := GetSelectors(ms, excludeSelectors)\n547\t\t\treturn FreeSelected(ms, selectors, t)\n548\t\t}\n549\t}\n550\t\n551\t// FreeSelected frees buffers for specific selectors while preserving others.\n552\t//\n553\t// This function is used when we want to retain some specific nodes beyond the retention time.\n554\t// It iterates through the provided selectors and frees their associated buffers.\n555\t//\n556\t// Parameters:\n557\t//   - ms: The MemoryStore instance\n558\t//   - selectors: List of selector paths to free (e.g., [[\"cluster1\", \"node1\"], [\"cluster2\", \"node2\"]])\n559\t//   - t: Time threshold for freeing buffers\n560\t//\n561\t// Returns the total number of buffers freed and any error encountered.\n562\tfunc FreeSelected(ms *MemoryStore, selectors [][]string, t time.Time) (int, error) {\n563\t\tfreed := 0\n564\t\n565\t\tfor _, selector := range selectors {\n566\t\n567\t\t\tfreedBuffers, err := ms.Free(selector, t.Unix())\n568\t\t\tif err != nil {\n569\t\t\t\tcclog.Errorf(\"error while freeing selected buffers: %#v\", err)\n570\t\t\t}\n571\t\t\tfreed += freedBuffers\n572\t\n573\t\t}\n574\t\n575\t\treturn freed, nil\n576\t}\n577\t\n578\t// GetSelectors returns all selectors at depth 2 (cluster/node level) that are NOT in the exclusion map.\n579\t//\n580\t// This function generates a list of selectors whose buffers should be freed by excluding\n581\t// selectors that correspond to nodes currently in use by running jobs.\n582\t//\n583\t// Parameters:\n584\t//   - ms: The MemoryStore instance\n585\t//   - excludeSelectors: Map of cluster names to node hostnames that should NOT be freed\n586\t//\n587\t// Returns a list of selectors ([]string paths) that can be safely freed.\n588\t//\n589\t// Example:\n590\t//\n591\t//\tIf the tree has paths [\"emmy\", \"node001\"] and [\"emmy\", \"node002\"],\n592\t//\tand excludeSelectors contains {\"emmy\": [\"node001\"]},\n593\t//\tthen only [[\"emmy\", \"node002\"]] is returned.\n594\tfunc GetSelectors(ms *MemoryStore, excludeSelectors map[string][]string) [][]string {\n595\t\tallSelectors := ms.GetPaths(2)\n596\t\n597\t\tfilteredSelectors := make([][]string, 0, len(allSelectors))\n598\t\n599\t\tfor _, path := range allSelectors {\n600\t\t\tif len(path) < 2 {\n601\t\t\t\tcontinue\n602\t\t\t}\n603\t\n604\t\t\tkey := path[0]   // The \"Key\" (Level 1)\n605\t\t\tvalue := path[1] // The \"Value\" (Level 2)\n606\t\n607\t\t\texclude := false\n608\t\n609\t\t\t// Check if the key exists in our exclusion map\n610\t\t\tif excludedValues, exists := excludeSelectors[key]; exists {\n611\t\t\t\t// The key exists, now check if the specific value is in the exclusion list\n612\t\t\t\tif slices.Contains(excludedValues, value) {\n613\t\t\t\t\texclude = true\n614\t\t\t\t}\n615\t\t\t}\n616\t\n617\t\t\tif !exclude {\n618\t\t\t\tfilteredSelectors = append(filteredSelectors, path)\n619\t\t\t}\n620\t\t}\n621\t\n622\t\treturn filteredSelectors\n623\t}\n624\t\n625\t// GetPaths returns a list of lists (paths) to the specified depth.\n626\tfunc (ms *MemoryStore) GetPaths(targetDepth int) [][]string {\n627\t\tvar results [][]string\n628\t\n629\t\t// Start recursion. Initial path is empty.\n630\t\t// We treat Root as depth 0.\n631\t\tms.root.collectPaths(0, targetDepth, []string{}, &results)\n632\t\n633\t\treturn results\n634\t}\n635\t\n636\t// Write all values in `metrics` to the level specified by `selector` for time `ts`.\n637\t// Look at `findLevelOrCreate` for how selectors work.\n638\tfunc (m *MemoryStore) Write(selector []string, ts int64, metrics []Metric) error {\n639\t\tvar ok bool\n640\t\tfor i, metric := range metrics {\n641\t\t\tif metric.MetricConfig.Frequency == 0 {\n642\t\t\t\tmetric.MetricConfig, ok = m.Metrics[metric.Name]\n643\t\t\t\tif !ok {\n644\t\t\t\t\tcclog.Debugf(\"[METRICSTORE]> Unknown metric '%s' in Write() - skipping\", metric.Name)\n645\t\t\t\t\tmetric.MetricConfig.Frequency = 0\n646\t\t\t\t}\n647\t\t\t\tmetrics[i] = metric\n648\t\t\t}\n649\t\t}\n650\t\n651\t\treturn m.WriteToLevel(&m.root, selector, ts, metrics)\n652\t}\n653\t\n654\tfunc (m *MemoryStore) GetLevel(selector []string) *Level {\n655\t\treturn m.root.findLevelOrCreate(selector, len(m.Metrics))\n656\t}\n657\t\n658\t// WriteToLevel assumes that `minfo` in `metrics` is filled in\n659\tfunc (m *MemoryStore) WriteToLevel(l *Level, selector []string, ts int64, metrics []Metric) error {\n660\t\tl = l.findLevelOrCreate(selector, len(m.Metrics))\n661\t\tl.lock.Lock()\n662\t\tdefer l.lock.Unlock()\n663\t\n664\t\tfor _, metric := range metrics {\n665\t\t\tif metric.MetricConfig.Frequency == 0 {\n666\t\t\t\tcontinue\n667\t\t\t}\n668\t\n669\t\t\tb := l.metrics[metric.MetricConfig.offset]\n670\t\t\tif b == nil {\n671\t\t\t\t// First write to this metric and level\n672\t\t\t\tb = newBuffer(ts, metric.MetricConfig.Frequency)\n673\t\t\t\tl.metrics[metric.MetricConfig.offset] = b\n674\t\t\t}\n675\t\n676\t\t\tnb, err := b.write(ts, metric.Value)\n677\t\t\tif err != nil {\n678\t\t\t\treturn err\n679\t\t\t}\n680\t\n681\t\t\t// Last write created a new buffer...\n682\t\t\tif b != nb {\n683\t\t\t\tl.metrics[metric.MetricConfig.offset] = nb\n684\t\t\t}\n685\t\t}\n686\t\treturn nil\n687\t}\n688\t\n689\t// Read returns all values for metric `metric` from `from` to `to` for the selected level(s).\n690\t// If the level does not hold the metric itself, the data will be aggregated recursively from the children.\n691\t// The second and third return value are the actual from/to for the data. Those can be different from\n692\t// the range asked for if no data was available.\n693\tfunc (m *MemoryStore) Read(selector util.Selector, metric string, from, to, resolution int64) ([]schema.Float, int64, int64, int64, error) {\n694\t\tif from > to {\n695\t\t\treturn nil, 0, 0, 0, errors.New(\"[METRICSTORE]> invalid time range\")\n696\t\t}\n697\t\n698\t\tminfo, ok := m.Metrics[metric]\n699\t\tif !ok {\n700\t\t\treturn nil, 0, 0, 0, errors.New(\"[METRICSTORE]> unknown metric: \" + metric)\n701\t\t}\n702\t\n703\t\tn, data := 0, make([]schema.Float, (to-from)/minfo.Frequency+1)\n704\t\n705\t\terr := m.root.findBuffers(selector, minfo.offset, func(b *buffer) error {\n706\t\t\tcdata, cfrom, cto, err := b.read(from, to, data)\n707\t\t\tif err != nil {\n708\t\t\t\treturn err\n709\t\t\t}\n710\t\n711\t\t\tif n == 0 {\n712\t\t\t\tfrom, to = cfrom, cto\n713\t\t\t} else if from != cfrom || to != cto || len(data) != len(cdata) {\n714\t\t\t\tmissingfront, missingback := int((from-cfrom)/minfo.Frequency), int((to-cto)/minfo.Frequency)\n715\t\t\t\tif missingfront != 0 {\n716\t\t\t\t\treturn ErrDataDoesNotAlignMissingFront\n717\t\t\t\t}\n718\t\n719\t\t\t\tnewlen := len(cdata) - missingback\n720\t\t\t\tif newlen < 1 {\n721\t\t\t\t\treturn ErrDataDoesNotAlignMissingBack\n722\t\t\t\t}\n723\t\t\t\tcdata = cdata[0:newlen]\n724\t\t\t\tif len(cdata) != len(data) {\n725\t\t\t\t\treturn ErrDataDoesNotAlignDataLenMismatch\n726\t\t\t\t}\n727\t\n728\t\t\t\tfrom, to = cfrom, cto\n729\t\t\t}\n730\t\n731\t\t\tdata = cdata\n732\t\t\tn += 1\n733\t\t\treturn nil\n734\t\t})\n735\t\n736\t\tif err != nil {\n737\t\t\treturn nil, 0, 0, 0, err\n738\t\t} else if n == 0 {\n739\t\t\treturn nil, 0, 0, 0, ErrNoHostOrMetric\n740\t\t} else if n > 1 {\n741\t\t\tif minfo.Aggregation == AvgAggregation {\n742\t\t\t\tnormalize := 1. / schema.Float(n)\n743\t\t\t\tfor i := 0; i < len(data); i++ {\n744\t\t\t\t\tdata[i] *= normalize\n745\t\t\t\t}\n746\t\t\t} else if minfo.Aggregation != SumAggregation {\n747\t\t\t\treturn nil, 0, 0, 0, errors.New(\"[METRICSTORE]> invalid aggregation\")\n748\t\t\t}\n749\t\t}\n750\t\n751\t\tdata, resolution, err = resampler.LargestTriangleThreeBucket(data, minfo.Frequency, resolution)\n752\t\tif err != nil {\n753\t\t\treturn nil, 0, 0, 0, err\n754\t\t}\n755\t\n756\t\treturn data, from, to, resolution, nil\n757\t}\n758\t\n759\t// Free releases all buffers for the selected level and all its children that\n760\t// contain only values older than `t`.\n761\tfunc (m *MemoryStore) Free(selector []string, t int64) (int, error) {\n762\t\treturn m.GetLevel(selector).free(t)\n763\t}\n764\t\n765\t// ForceFree unconditionally removes the oldest buffer from each metric chain.\n766\tfunc (m *MemoryStore) ForceFree() (int, error) {\n767\t\treturn m.GetLevel(nil).forceFree()\n768\t}\n769\t\n770\tfunc (m *MemoryStore) FreeAll() error {\n771\t\tm.root.lock.Lock()\n772\t\tdefer m.root.lock.Unlock()\n773\t\n774\t\tfor k := range m.root.children {\n775\t\t\tdelete(m.root.children, k)\n776\t\t}\n777\t\n778\t\treturn nil\n779\t}\n780\t\n781\tfunc (m *MemoryStore) SizeInBytes() int64 {\n782\t\treturn m.root.sizeInBytes()\n783\t}\n784\t\n785\tfunc (m *MemoryStore) SizeInGB() float64 {\n786\t\treturn float64(m.root.sizeInBytes()) / 1e9\n787\t}\n788\t\n789\t// ListChildren , given a selector, returns a list of all children of the level\n790\t// selected.\n791\tfunc (m *MemoryStore) ListChildren(selector []string) []string {\n792\t\tlvl := &m.root\n793\t\tfor lvl != nil && len(selector) != 0 {\n794\t\t\tlvl.lock.RLock()\n795\t\t\tnext := lvl.children[selector[0]]\n796\t\t\tlvl.lock.RUnlock()\n797\t\t\tlvl = next\n798\t\t\tselector = selector[1:]\n799\t\t}\n800\t\n801\t\tif lvl == nil {\n802\t\t\treturn nil\n803\t\t}\n804\t\n805\t\tlvl.lock.RLock()\n806\t\tdefer lvl.lock.RUnlock()\n807\t\n808\t\tchildren := make([]string, 0, len(lvl.children))\n809\t\tfor child := range lvl.children {\n810\t\t\tchildren = append(children, child)\n811\t\t}\n812\t\n813\t\treturn children\n814\t}\n815\t"}]},"uuid":"7f284098-1eca-498d-991e-7fd1353b0a8a","timestamp":"2026-06-05T06:33:19.757Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go","content":"// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n// All rights reserved. This file is part of cc-backend.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\n// Package metricstore provides an efficient in-memory time-series metric storage system\n// with support for hierarchical data organization, checkpointing, and archiving.\n//\n// The package organizes metrics in a tree structure (cluster → host → component) and\n// provides concurrent read/write access to metric data with configurable aggregation strategies.\n// Background goroutines handle periodic checkpointing (JSON or WAL/binary format), archiving old data,\n// and enforcing retention policies.\n//\n// Key features:\n//   - In-memory metric storage with configurable retention\n//   - Hierarchical data organization (selectors)\n//   - Concurrent checkpoint/archive workers\n//   - Support for sum and average aggregation\n//   - NATS integration for metric ingestion via InfluxDB line protocol\npackage metricstore\n\nimport (\n\t\"bytes\"\n\t\"context\"\n\t\"encoding/json\"\n\t\"errors\"\n\t\"fmt\"\n\t\"runtime\"\n\t\"runtime/debug\"\n\t\"slices\"\n\t\"sync\"\n\t\"time\"\n\n\t\"github.com/ClusterCockpit/cc-backend/internal/config\"\n\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/resampler\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/util\"\n)\n\n// GlobalState holds the global state for the metric store with thread-safe access.\ntype GlobalState struct {\n\tmu                sync.RWMutex\n\tlastRetentionTime int64\n\tselectorsExcluded bool\n}\n\nvar (\n\tsingleton  sync.Once\n\tmsInstance *MemoryStore\n\t// shutdownFunc stores the context cancellation function created in Init\n\t// and is called during Shutdown to cancel all background goroutines\n\tshutdownFunc   context.CancelFunc\n\tshutdownFuncMu sync.Mutex // Protects shutdownFunc from concurrent access\n\t// Create a global instance\n\tstate = &GlobalState{}\n)\n\n// NodeProvider provides information about nodes currently in use by running jobs.\n//\n// This interface allows metricstore to query job information without directly\n// depending on the repository package, breaking the import cycle.\n//\n// Implementations should return nodes that are actively processing jobs started\n// before the given timestamp. These nodes will be excluded from retention-based\n// garbage collection to prevent data loss for jobs that are still running or\n// recently completed.\ntype NodeProvider interface {\n\t// GetUsedNodes returns a map of cluster names to sorted lists of unique hostnames\n\t// that are currently in use by jobs that started before the given timestamp.\n\t//\n\t// Parameters:\n\t//   - ts: Unix timestamp threshold - returns nodes with jobs started before this time\n\t//\n\t// Returns:\n\t//   - Map of cluster names to lists of node hostnames that should be excluded from garbage collection\n\t//   - Error if the query fails\n\tGetUsedNodes(ts int64) (map[string][]string, error)\n}\n\n// Metric represents a single metric data point to be written to the store.\ntype Metric struct {\n\tName  string\n\tValue schema.Float\n\t// MetricConfig contains frequency and aggregation settings for this metric.\n\t// If Frequency is 0, configuration will be looked up from MemoryStore.Metrics during Write().\n\tMetricConfig MetricConfig\n}\n\n// MemoryStore is the main in-memory time-series metric storage implementation.\n//\n// It organizes metrics in a hierarchical tree structure where each level represents\n// a component of the system hierarchy (e.g., cluster → host → CPU). Each level can\n// store multiple metrics as time-series buffers.\n//\n// The store is initialized as a singleton via InitMetrics() and accessed via GetMemoryStore().\n// All public methods are safe for concurrent use.\ntype MemoryStore struct {\n\tMetrics      map[string]MetricConfig\n\troot         Level\n\tnodeProvider NodeProvider\n}\n\n// Init initializes the metric store from configuration and starts background workers.\n//\n// This function must be called exactly once before any other metricstore operations.\n// It performs the following initialization steps:\n//  1. Validates and decodes the metric store configuration\n//  2. Configures worker pool size (defaults to NumCPU/2+1, max 10)\n//  3. Loads metric configurations from all registered clusters\n//  4. Restores checkpoints within the retention window\n//  5. Starts background workers for retention, checkpointing, archiving, and monitoring\n//  6. Optionally subscribes to NATS for real-time metric ingestion\n//\n// Parameters:\n//   - rawConfig: JSON configuration for the metric store (see MetricStoreConfig); may be nil to use defaults\n//   - metrics: Map of metric names to their configurations (frequency and aggregation strategy)\n//   - wg: WaitGroup that will be incremented for each background goroutine started\n//\n// The function will call cclog.Fatal on critical errors during initialization.\n// Use Shutdown() to cleanly stop all background workers started by Init().\n//\n// Note: Signal handling must be implemented by the caller. Call Shutdown() when\n// receiving termination signals to ensure checkpoint data is persisted.\nfunc Init(rawConfig json.RawMessage, metrics map[string]MetricConfig, wg *sync.WaitGroup) {\n\tstartupTime := time.Now()\n\n\tif rawConfig != nil {\n\t\tconfig.Validate(configSchema, rawConfig)\n\t\tdec := json.NewDecoder(bytes.NewReader(rawConfig))\n\t\tdec.DisallowUnknownFields()\n\t\tif err := dec.Decode(&Keys); err != nil {\n\t\t\tcclog.Abortf(\"[METRICSTORE]> Metric Store Config Init: Could not decode config file '%s'.\\nError: %s\\n\", rawConfig, err.Error())\n\t\t}\n\t}\n\n\t// Set NumWorkers from config or use default\n\tif Keys.NumWorkers <= 0 {\n\t\tKeys.NumWorkers = min(runtime.NumCPU()/2+1, DefaultMaxWorkers)\n\t}\n\tcclog.Debugf(\"[METRICSTORE]> Using %d workers for checkpoint/archive operations\\n\", Keys.NumWorkers)\n\n\t// Pass the config.MetricStoreKeys\n\tInitMetrics(metrics)\n\n\tms := GetMemoryStore()\n\n\td, err := time.ParseDuration(Keys.RetentionInMemory)\n\tif err != nil {\n\t\tcclog.Fatal(err)\n\t}\n\n\trestoreFrom := startupTime.Add(-d)\n\tcclog.Infof(\"[METRICSTORE]> Loading checkpoints newer than %s\\n\", restoreFrom.Format(time.RFC3339))\n\tfiles, err := ms.FromCheckpointFiles(Keys.Checkpoints.RootDir, restoreFrom.Unix())\n\tloadedData := ms.SizeInBytes() / 1024 / 1024 // In MB\n\tif err != nil {\n\t\tcclog.Fatalf(\"[METRICSTORE]> Loading checkpoints failed: %s\\n\", err.Error())\n\t} else {\n\t\tcclog.Infof(\"[METRICSTORE]> Checkpoints loaded (%d files, %d MB, that took %fs)\\n\", files, loadedData, time.Since(startupTime).Seconds())\n\t}\n\n\t// Try to use less memory by forcing a GC run here and then\n\t// lowering the target percentage. The default of 100 means\n\t// that only once the ratio of new allocations execeds the\n\t// previously active heap, a GC is triggered.\n\t// Forcing a GC here will set the \"previously active heap\"\n\t// to a minumum.\n\t// runtime.GC()\n\n\tctx, shutdown := context.WithCancel(context.Background())\n\n\tRetention(wg, ctx)\n\tCheckpointing(wg, ctx)\n\tCleanUp(wg, ctx)\n\tWALStaging(wg, ctx)\n\tMemoryUsageTracker(wg, ctx)\n\n\t// Note: Signal handling has been removed from this function.\n\t// The caller is responsible for handling shutdown signals and calling\n\t// the shutdown() function when appropriate.\n\t// Store the shutdown function for later use by Shutdown()\n\tshutdownFuncMu.Lock()\n\tshutdownFunc = shutdown\n\tshutdownFuncMu.Unlock()\n\n\tif Keys.Subscriptions != nil {\n\t\twg.Go(func() {\n\t\t\tif err := ReceiveNats(ms, Keys.NumWorkers, ctx); err != nil {\n\t\t\t\tcclog.Fatal(err)\n\t\t\t}\n\t\t})\n\t}\n}\n\n// InitMetrics initializes the singleton MemoryStore instance with the given metric configurations.\n//\n// This function must be called before GetMemoryStore() and can only be called once due to\n// the singleton pattern. It assigns each metric an internal offset for efficient buffer indexing.\n//\n// Parameters:\n//   - metrics: Map of metric names to their configurations (frequency and aggregation strategy)\n//\n// Panics if any metric has Frequency == 0, which indicates an invalid configuration.\n//\n// After this call, the global msInstance is ready for use via GetMemoryStore().\nfunc InitMetrics(metrics map[string]MetricConfig) {\n\tsingleton.Do(func() {\n\t\toffset := 0\n\t\tfor key, cfg := range metrics {\n\t\t\tif cfg.Frequency == 0 {\n\t\t\t\tpanic(\"[METRICSTORE]> invalid frequency\")\n\t\t\t}\n\n\t\t\tmetrics[key] = MetricConfig{\n\t\t\t\tFrequency:   cfg.Frequency,\n\t\t\t\tAggregation: cfg.Aggregation,\n\t\t\t\toffset:      offset,\n\t\t\t}\n\t\t\toffset += 1\n\t\t}\n\n\t\tmsInstance = &MemoryStore{\n\t\t\troot: Level{\n\t\t\t\tmetrics:  make([]*buffer, len(metrics)),\n\t\t\t\tchildren: make(map[string]*Level),\n\t\t\t},\n\t\t\tMetrics: metrics,\n\t\t}\n\t})\n}\n\n// GetMemoryStore returns the singleton MemoryStore instance.\n//\n// Returns the initialized MemoryStore singleton. Calls cclog.Fatal if InitMetrics() was not called first.\n//\n// This function is safe for concurrent use after initialization.\nfunc GetMemoryStore() *MemoryStore {\n\tif msInstance == nil {\n\t\tcclog.Warnf(\"[METRICSTORE]> MemoryStore not initialized!\")\n\t}\n\n\treturn msInstance\n}\n\nfunc (ms *MemoryStore) GetMetricFrequency(metricName string) (int64, error) {\n\tif metric, ok := ms.Metrics[metricName]; ok {\n\t\treturn metric.Frequency, nil\n\t}\n\treturn 0, fmt.Errorf(\"[METRICSTORE]> metric %s not found\", metricName)\n}\n\n// SetNodeProvider sets the NodeProvider implementation for the MemoryStore.\n// This must be called during initialization to provide job state information\n// for selective buffer retention during Free operations.\n// If not set, the Free function will fall back to freeing all buffers.\nfunc (ms *MemoryStore) SetNodeProvider(provider NodeProvider) {\n\tms.nodeProvider = provider\n}\n\n// Shutdown performs a graceful shutdown of the metric store.\n//\n// This function cancels all background goroutines started by Init() and writes\n// a final checkpoint to disk before returning. It should be called when the\n// application receives a termination signal.\n//\n// The function will:\n//  1. Cancel the context to stop all background workers\n//  2. Close the WAL messages channel if using WAL format\n//  3. Write a final checkpoint to preserve in-memory data\n//  4. Log any errors encountered during shutdown\n//\n// Note: This function blocks until the final checkpoint is written.\nfunc Shutdown() {\n\ttotalStart := time.Now()\n\n\tshutdownFuncMu.Lock()\n\tdefer shutdownFuncMu.Unlock()\n\tif shutdownFunc != nil {\n\t\tshutdownFunc()\n\t}\n\tcclog.Infof(\"[METRICSTORE]> Background workers cancelled (%v)\", time.Since(totalStart))\n\n\tif Keys.Checkpoints.FileFormat == \"wal\" {\n\t\t// Signal producers to stop sending before closing channels,\n\t\t// preventing send-on-closed-channel panics from in-flight NATS workers.\n\t\twalShuttingDown.Store(true)\n\t\t// Brief grace period for in-flight DecodeLine calls to complete.\n\t\ttime.Sleep(100 * time.Millisecond)\n\n\t\tfor _, ch := range walShardChs {\n\t\t\tclose(ch)\n\t\t}\n\t\tdrainStart := time.Now()\n\t\tWaitForWALStagingDrain()\n\t\tcclog.Infof(\"[METRICSTORE]> WAL staging goroutines exited (%v)\", time.Since(drainStart))\n\t}\n\n\tcclog.Infof(\"[METRICSTORE]> Writing checkpoint to '%s'...\", Keys.Checkpoints.RootDir)\n\tcheckpointStart := time.Now()\n\tvar files int\n\tvar err error\n\n\tms := GetMemoryStore()\n\n\tlastCheckpointMu.Lock()\n\tfrom := lastCheckpoint\n\tlastCheckpointMu.Unlock()\n\n\tif Keys.Checkpoints.FileFormat == \"wal\" {\n\t\t// WAL files are deleted per-host inside ToCheckpointWAL workers.\n\t\tfiles, _, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n\t} else {\n\t\tfiles, err = ms.ToCheckpoint(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n\t}\n\n\tif err != nil {\n\t\tcclog.Errorf(\"[METRICSTORE]> Writing checkpoint failed: %s\", err.Error())\n\t}\n\tcclog.Infof(\"[METRICSTORE]> Done! (%d files written in %v, total shutdown: %v)\", files, time.Since(checkpointStart), time.Since(totalStart))\n}\n\n// Retention starts a background goroutine that periodically frees old metric data.\n//\n// This worker runs at half the retention interval and calls Free() to remove buffers\n// older than the configured retention time. It respects the NodeProvider to preserve\n// data for nodes with active jobs.\n//\n// Parameters:\n//   - wg: WaitGroup to signal completion when context is cancelled\n//   - ctx: Context for cancellation signal\n//\n// The goroutine exits when ctx is cancelled.\nfunc Retention(wg *sync.WaitGroup, ctx context.Context) {\n\tms := GetMemoryStore()\n\n\twg.Go(func() {\n\t\td, err := time.ParseDuration(Keys.RetentionInMemory)\n\t\tif err != nil {\n\t\t\tcclog.Fatal(err)\n\t\t}\n\t\tif d <= 0 {\n\t\t\treturn\n\t\t}\n\n\t\ttickInterval := d / 2\n\t\tif tickInterval <= 0 {\n\t\t\treturn\n\t\t}\n\t\tticker := time.NewTicker(tickInterval)\n\t\tdefer ticker.Stop()\n\n\t\tfor {\n\t\t\tselect {\n\t\t\tcase <-ctx.Done():\n\t\t\t\treturn\n\t\t\tcase <-ticker.C:\n\t\t\t\tstate.mu.Lock()\n\n\t\t\t\tt := time.Now().Add(-d)\n\n\t\t\t\tstate.lastRetentionTime = t.Unix()\n\n\t\t\t\tcclog.Infof(\"[METRICSTORE]> start freeing buffers (older than %s)...\\n\", t.Format(time.RFC3339))\n\n\t\t\t\tfreed, err := Free(ms, t)\n\t\t\t\tif err != nil {\n\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> freeing up buffers failed: %s\\n\", err.Error())\n\t\t\t\t} else {\n\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> done: %d buffers freed\\n\", freed)\n\t\t\t\t}\n\n\t\t\t\tstate.mu.Unlock()\n\n\t\t\t\t// Clean up the buffer pool\n\t\t\t\tbufferPool.Clean(state.lastRetentionTime)\n\t\t\t}\n\t\t}\n\t})\n}\n\n// MemoryUsageTracker starts a background goroutine that monitors memory usage.\n//\n// This worker checks actual process memory usage (via runtime.MemStats) periodically\n// and force-frees buffers if memory exceeds the configured cap. It uses FreeOSMemory()\n// to return memory to the OS after freeing buffers, avoiding aggressive GC that causes\n// performance issues.\n//\n// The tracker logs both actual memory usage (heap allocated) and metric data size for\n// visibility into memory overhead from Go runtime structures and allocations.\n//\n// Parameters:\n//   - wg: WaitGroup to signal completion when context is cancelled\n//   - ctx: Context for cancellation signal\n//\n// The goroutine exits when ctx is cancelled.\nfunc MemoryUsageTracker(wg *sync.WaitGroup, ctx context.Context) {\n\tms := GetMemoryStore()\n\n\twg.Go(func() {\n\t\tnormalInterval := DefaultMemoryUsageTrackerInterval\n\t\tfastInterval := 30 * time.Second\n\n\t\tif normalInterval <= 0 {\n\t\t\treturn\n\t\t}\n\n\t\tticker := time.NewTicker(normalInterval)\n\t\tdefer ticker.Stop()\n\t\tcurrentInterval := normalInterval\n\n\t\tfor {\n\t\t\tselect {\n\t\t\tcase <-ctx.Done():\n\t\t\t\treturn\n\t\t\tcase <-ticker.C:\n\t\t\t\tvar mem runtime.MemStats\n\t\t\t\truntime.ReadMemStats(&mem)\n\t\t\t\tactualMemoryGB := float64(mem.Alloc) / 1e9\n\t\t\t\tmetricDataGB := ms.SizeInGB()\n\t\t\t\tcclog.Infof(\"[METRICSTORE]> memory usage: %.2f GB actual (%.2f GB metric data)\", actualMemoryGB, metricDataGB)\n\n\t\t\t\tfreedExcluded := 0\n\t\t\t\tfreedEmergency := 0\n\t\t\t\tvar err error\n\n\t\t\t\tstate.mu.RLock()\n\t\t\t\tlastRetention := state.lastRetentionTime\n\t\t\t\tselectorsExcluded := state.selectorsExcluded\n\t\t\t\tstate.mu.RUnlock()\n\n\t\t\t\tif lastRetention != 0 && selectorsExcluded {\n\t\t\t\t\tfreedExcluded, err = ms.Free(nil, lastRetention)\n\t\t\t\t\tif err != nil {\n\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> error while force-freeing the excluded buffers: %s\", err)\n\t\t\t\t\t}\n\n\t\t\t\t\tif freedExcluded > 0 {\n\t\t\t\t\t\tdebug.FreeOSMemory()\n\t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> done: %d excluded buffers force-freed\", freedExcluded)\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\truntime.ReadMemStats(&mem)\n\t\t\t\tactualMemoryGB = float64(mem.Alloc) / 1e9\n\n\t\t\t\tif actualMemoryGB > float64(Keys.MemoryCap) {\n\t\t\t\t\tcclog.Warnf(\"[METRICSTORE]> memory usage %.2f GB exceeds cap %d GB, starting emergency buffer freeing\", actualMemoryGB, Keys.MemoryCap)\n\n\t\t\t\t\t// Use progressive time-based Free with increasing threshold\n\t\t\t\t\t// instead of ForceFree loop — fewer tree traversals, more effective\n\t\t\t\t\td, parseErr := time.ParseDuration(Keys.RetentionInMemory)\n\t\t\t\t\tif parseErr != nil {\n\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> cannot parse retention duration: %s\", parseErr)\n\t\t\t\t\t} else {\n\t\t\t\t\t\tthresholds := []float64{0.75, 0.5, 0.25}\n\t\t\t\t\t\tfor _, fraction := range thresholds {\n\t\t\t\t\t\t\tthreshold := time.Now().Add(-time.Duration(float64(d) * fraction))\n\t\t\t\t\t\t\tfreed, freeErr := ms.Free(nil, threshold.Unix())\n\t\t\t\t\t\t\tif freeErr != nil {\n\t\t\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> error while freeing buffers at %.0f%% retention: %s\", fraction*100, freeErr)\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\tfreedEmergency += freed\n\n\t\t\t\t\t\t\tbufferPool.Clear()\n\t\t\t\t\t\t\truntime.GC()\n\t\t\t\t\t\t\truntime.ReadMemStats(&mem)\n\t\t\t\t\t\t\tactualMemoryGB = float64(mem.Alloc) / 1e9\n\n\t\t\t\t\t\t\tif actualMemoryGB < float64(Keys.MemoryCap) {\n\t\t\t\t\t\t\t\tbreak\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t\tbufferPool.Clear()\n\t\t\t\t\tdebug.FreeOSMemory()\n\n\t\t\t\t\truntime.ReadMemStats(&mem)\n\t\t\t\t\tactualMemoryGB = float64(mem.Alloc) / 1e9\n\n\t\t\t\t\tif actualMemoryGB >= float64(Keys.MemoryCap) {\n\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> after emergency frees (%d buffers), memory usage %.2f GB still at/above cap %d GB\", freedEmergency, actualMemoryGB, Keys.MemoryCap)\n\t\t\t\t\t} else {\n\t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> emergency freeing complete: %d buffers freed, memory now %.2f GB\", freedEmergency, actualMemoryGB)\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// Adaptive ticker: check more frequently when memory is high\n\t\t\t\tmemoryRatio := actualMemoryGB / float64(Keys.MemoryCap)\n\t\t\t\tif memoryRatio > 0.8 && currentInterval != fastInterval {\n\t\t\t\t\tticker.Reset(fastInterval)\n\t\t\t\t\tcurrentInterval = fastInterval\n\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> memory at %.0f%% of cap, switching to fast check interval (30s)\", memoryRatio*100)\n\t\t\t\t} else if memoryRatio <= 0.8 && currentInterval != normalInterval {\n\t\t\t\t\tticker.Reset(normalInterval)\n\t\t\t\t\tcurrentInterval = normalInterval\n\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> memory at %.0f%% of cap, switching to normal check interval\", memoryRatio*100)\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t})\n}\n\n// Free removes metric data older than the given time while preserving data for active nodes.\n//\n// This function implements intelligent retention by consulting the NodeProvider (if configured)\n// to determine which nodes are currently in use by running jobs. Data for these nodes is\n// preserved even if older than the retention time.\n//\n// Parameters:\n//   - ms: The MemoryStore instance\n//   - t: Time threshold - buffers with data older than this will be freed\n//\n// Returns:\n//   - Number of buffers freed\n//   - Error if NodeProvider query fails\n//\n// Behavior:\n//   - If no NodeProvider is set: frees all buffers older than t\n//   - If NodeProvider returns empty map: frees all buffers older than t\n//   - Otherwise: preserves buffers for nodes returned by GetUsedNodes(), frees others\nfunc Free(ms *MemoryStore, t time.Time) (int, error) {\n\t// If no NodeProvider is configured, free all buffers older than t\n\tif ms.nodeProvider == nil {\n\t\treturn ms.Free(nil, t.Unix())\n\t}\n\n\texcludeSelectors, err := ms.nodeProvider.GetUsedNodes(t.Unix())\n\tif err != nil {\n\t\treturn 0, err\n\t}\n\n\tswitch lenMap := len(excludeSelectors); lenMap {\n\n\t// If the length of the map returned by GetUsedNodes() is 0,\n\t// then use default Free method with nil selector\n\tcase 0:\n\t\tstate.selectorsExcluded = false\n\t\treturn ms.Free(nil, t.Unix())\n\n\t// Else formulate selectors, exclude those from the map\n\t// and free the rest of the selectors\n\tdefault:\n\t\tstate.selectorsExcluded = true\n\t\tselectors := GetSelectors(ms, excludeSelectors)\n\t\treturn FreeSelected(ms, selectors, t)\n\t}\n}\n\n// FreeSelected frees buffers for specific selectors while preserving others.\n//\n// This function is used when we want to retain some specific nodes beyond the retention time.\n// It iterates through the provided selectors and frees their associated buffers.\n//\n// Parameters:\n//   - ms: The MemoryStore instance\n//   - selectors: List of selector paths to free (e.g., [[\"cluster1\", \"node1\"], [\"cluster2\", \"node2\"]])\n//   - t: Time threshold for freeing buffers\n//\n// Returns the total number of buffers freed and any error encountered.\nfunc FreeSelected(ms *MemoryStore, selectors [][]string, t time.Time) (int, error) {\n\tfreed := 0\n\n\tfor _, selector := range selectors {\n\n\t\tfreedBuffers, err := ms.Free(selector, t.Unix())\n\t\tif err != nil {\n\t\t\tcclog.Errorf(\"error while freeing selected buffers: %#v\", err)\n\t\t}\n\t\tfreed += freedBuffers\n\n\t}\n\n\treturn freed, nil\n}\n\n// GetSelectors returns all selectors at depth 2 (cluster/node level) that are NOT in the exclusion map.\n//\n// This function generates a list of selectors whose buffers should be freed by excluding\n// selectors that correspond to nodes currently in use by running jobs.\n//\n// Parameters:\n//   - ms: The MemoryStore instance\n//   - excludeSelectors: Map of cluster names to node hostnames that should NOT be freed\n//\n// Returns a list of selectors ([]string paths) that can be safely freed.\n//\n// Example:\n//\n//\tIf the tree has paths [\"emmy\", \"node001\"] and [\"emmy\", \"node002\"],\n//\tand excludeSelectors contains {\"emmy\": [\"node001\"]},\n//\tthen only [[\"emmy\", \"node002\"]] is returned.\nfunc GetSelectors(ms *MemoryStore, excludeSelectors map[string][]string) [][]string {\n\tallSelectors := ms.GetPaths(2)\n\n\tfilteredSelectors := make([][]string, 0, len(allSelectors))\n\n\tfor _, path := range allSelectors {\n\t\tif len(path) < 2 {\n\t\t\tcontinue\n\t\t}\n\n\t\tkey := path[0]   // The \"Key\" (Level 1)\n\t\tvalue := path[1] // The \"Value\" (Level 2)\n\n\t\texclude := false\n\n\t\t// Check if the key exists in our exclusion map\n\t\tif excludedValues, exists := excludeSelectors[key]; exists {\n\t\t\t// The key exists, now check if the specific value is in the exclusion list\n\t\t\tif slices.Contains(excludedValues, value) {\n\t\t\t\texclude = true\n\t\t\t}\n\t\t}\n\n\t\tif !exclude {\n\t\t\tfilteredSelectors = append(filteredSelectors, path)\n\t\t}\n\t}\n\n\treturn filteredSelectors\n}\n\n// GetPaths returns a list of lists (paths) to the specified depth.\nfunc (ms *MemoryStore) GetPaths(targetDepth int) [][]string {\n\tvar results [][]string\n\n\t// Start recursion. Initial path is empty.\n\t// We treat Root as depth 0.\n\tms.root.collectPaths(0, targetDepth, []string{}, &results)\n\n\treturn results\n}\n\n// Write all values in `metrics` to the level specified by `selector` for time `ts`.\n// Look at `findLevelOrCreate` for how selectors work.\nfunc (m *MemoryStore) Write(selector []string, ts int64, metrics []Metric) error {\n\tvar ok bool\n\tfor i, metric := range metrics {\n\t\tif metric.MetricConfig.Frequency == 0 {\n\t\t\tmetric.MetricConfig, ok = m.Metrics[metric.Name]\n\t\t\tif !ok {\n\t\t\t\tcclog.Debugf(\"[METRICSTORE]> Unknown metric '%s' in Write() - skipping\", metric.Name)\n\t\t\t\tmetric.MetricConfig.Frequency = 0\n\t\t\t}\n\t\t\tmetrics[i] = metric\n\t\t}\n\t}\n\n\treturn m.WriteToLevel(&m.root, selector, ts, metrics)\n}\n\nfunc (m *MemoryStore) GetLevel(selector []string) *Level {\n\treturn m.root.findLevelOrCreate(selector, len(m.Metrics))\n}\n\n// WriteToLevel assumes that `minfo` in `metrics` is filled in\nfunc (m *MemoryStore) WriteToLevel(l *Level, selector []string, ts int64, metrics []Metric) error {\n\tl = l.findLevelOrCreate(selector, len(m.Metrics))\n\tl.lock.Lock()\n\tdefer l.lock.Unlock()\n\n\tfor _, metric := range metrics {\n\t\tif metric.MetricConfig.Frequency == 0 {\n\t\t\tcontinue\n\t\t}\n\n\t\tb := l.metrics[metric.MetricConfig.offset]\n\t\tif b == nil {\n\t\t\t// First write to this metric and level\n\t\t\tb = newBuffer(ts, metric.MetricConfig.Frequency)\n\t\t\tl.metrics[metric.MetricConfig.offset] = b\n\t\t}\n\n\t\tnb, err := b.write(ts, metric.Value)\n\t\tif err != nil {\n\t\t\treturn err\n\t\t}\n\n\t\t// Last write created a new buffer...\n\t\tif b != nb {\n\t\t\tl.metrics[metric.MetricConfig.offset] = nb\n\t\t}\n\t}\n\treturn nil\n}\n\n// Read returns all values for metric `metric` from `from` to `to` for the selected level(s).\n// If the level does not hold the metric itself, the data will be aggregated recursively from the children.\n// The second and third return value are the actual from/to for the data. Those can be different from\n// the range asked for if no data was available.\nfunc (m *MemoryStore) Read(selector util.Selector, metric string, from, to, resolution int64) ([]schema.Float, int64, int64, int64, error) {\n\tif from > to {\n\t\treturn nil, 0, 0, 0, errors.New(\"[METRICSTORE]> invalid time range\")\n\t}\n\n\tminfo, ok := m.Metrics[metric]\n\tif !ok {\n\t\treturn nil, 0, 0, 0, errors.New(\"[METRICSTORE]> unknown metric: \" + metric)\n\t}\n\n\tn, data := 0, make([]schema.Float, (to-from)/minfo.Frequency+1)\n\n\terr := m.root.findBuffers(selector, minfo.offset, func(b *buffer) error {\n\t\tcdata, cfrom, cto, err := b.read(from, to, data)\n\t\tif err != nil {\n\t\t\treturn err\n\t\t}\n\n\t\tif n == 0 {\n\t\t\tfrom, to = cfrom, cto\n\t\t} else if from != cfrom || to != cto || len(data) != len(cdata) {\n\t\t\tmissingfront, missingback := int((from-cfrom)/minfo.Frequency), int((to-cto)/minfo.Frequency)\n\t\t\tif missingfront != 0 {\n\t\t\t\treturn ErrDataDoesNotAlignMissingFront\n\t\t\t}\n\n\t\t\tnewlen := len(cdata) - missingback\n\t\t\tif newlen < 1 {\n\t\t\t\treturn ErrDataDoesNotAlignMissingBack\n\t\t\t}\n\t\t\tcdata = cdata[0:newlen]\n\t\t\tif len(cdata) != len(data) {\n\t\t\t\treturn ErrDataDoesNotAlignDataLenMismatch\n\t\t\t}\n\n\t\t\tfrom, to = cfrom, cto\n\t\t}\n\n\t\tdata = cdata\n\t\tn += 1\n\t\treturn nil\n\t})\n\n\tif err != nil {\n\t\treturn nil, 0, 0, 0, err\n\t} else if n == 0 {\n\t\treturn nil, 0, 0, 0, ErrNoHostOrMetric\n\t} else if n > 1 {\n\t\tif minfo.Aggregation == AvgAggregation {\n\t\t\tnormalize := 1. / schema.Float(n)\n\t\t\tfor i := 0; i < len(data); i++ {\n\t\t\t\tdata[i] *= normalize\n\t\t\t}\n\t\t} else if minfo.Aggregation != SumAggregation {\n\t\t\treturn nil, 0, 0, 0, errors.New(\"[METRICSTORE]> invalid aggregation\")\n\t\t}\n\t}\n\n\tdata, resolution, err = resampler.LargestTriangleThreeBucket(data, minfo.Frequency, resolution)\n\tif err != nil {\n\t\treturn nil, 0, 0, 0, err\n\t}\n\n\treturn data, from, to, resolution, nil\n}\n\n// Free releases all buffers for the selected level and all its children that\n// contain only values older than `t`.\nfunc (m *MemoryStore) Free(selector []string, t int64) (int, error) {\n\treturn m.GetLevel(selector).free(t)\n}\n\n// ForceFree unconditionally removes the oldest buffer from each metric chain.\nfunc (m *MemoryStore) ForceFree() (int, error) {\n\treturn m.GetLevel(nil).forceFree()\n}\n\nfunc (m *MemoryStore) FreeAll() error {\n\tm.root.lock.Lock()\n\tdefer m.root.lock.Unlock()\n\n\tfor k := range m.root.children {\n\t\tdelete(m.root.children, k)\n\t}\n\n\treturn nil\n}\n\nfunc (m *MemoryStore) SizeInBytes() int64 {\n\treturn m.root.sizeInBytes()\n}\n\nfunc (m *MemoryStore) SizeInGB() float64 {\n\treturn float64(m.root.sizeInBytes()) / 1e9\n}\n\n// ListChildren , given a selector, returns a list of all children of the level\n// selected.\nfunc (m *MemoryStore) ListChildren(selector []string) []string {\n\tlvl := &m.root\n\tfor lvl != nil && len(selector) != 0 {\n\t\tlvl.lock.RLock()\n\t\tnext := lvl.children[selector[0]]\n\t\tlvl.lock.RUnlock()\n\t\tlvl = next\n\t\tselector = selector[1:]\n\t}\n\n\tif lvl == nil {\n\t\treturn nil\n\t}\n\n\tlvl.lock.RLock()\n\tdefer lvl.lock.RUnlock()\n\n\tchildren := make([]string, 0, len(lvl.children))\n\tfor child := range lvl.children {\n\t\tchildren = append(children, child)\n\t}\n\n\treturn children\n}\n","numLines":815,"startLine":1,"totalLines":815}},"sourceToolAssistantUUID":"e71a0228-2857-47ba-8749-e7d6dc6df98c","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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If the calculated index\n197\t// exceeds capacity, a new buffer is allocated and linked as the new head.\n198\t//\n199\t// Missing timestamps are automatically filled with NaN values to maintain alignment.\n200\t// Overwrites are allowed if the index is already within the existing data slice.\n201\t//\n202\t// Parameters:\n203\t//   - ts:    Unix timestamp in seconds\n204\t//   - value: Metric value (can be schema.NaN for missing data)\n205\t//\n206\t// Returns:\n207\t//   - *buffer: The new head buffer (same as b if no new buffer created)\n208\t//   - error:   Non-nil if timestamp is before buffer start\n209\tfunc (b *buffer) write(ts int64, value schema.Float) (*buffer, error) {\n210\t\tif ts < b.start {\n211\t\t\treturn nil, errors.New(\"[METRICSTORE]> cannot write value to buffer from past\")\n212\t\t}\n213\t\n214\t\t// idx := int((ts - b.start + (b.frequency / 3)) / b.frequency)\n215\t\tidx := int((ts - b.start) / b.frequency)\n216\t\tif idx >= cap(b.data) {\n217\t\t\tnewbuf := newBuffer(ts, b.frequency)\n218\t\t\tnewbuf.prev = b\n219\t\t\tb.next = newbuf\n220\t\t\tb = newbuf\n221\t\t\tidx = 0\n222\t\t}\n223\t\n224\t\t// Overwriting value or writing value from past\n225\t\tif idx < len(b.data) {\n226\t\t\tb.data[idx] = value\n227\t\t\treturn b, nil\n228\t\t}\n229\t\n230\t\t// Fill up unwritten slots with NaN\n231\t\tfor i := len(b.data); i < idx; i++ {\n232\t\t\tb.data = append(b.data, schema.NaN)\n233\t\t}\n234\t\n235\t\tb.data = append(b.data, value)\n236\t\treturn b, nil\n237\t}\n238\t\n239\tfunc (b *buffer) end() int64 {\n240\t\treturn b.firstWrite() + int64(len(b.data))*b.frequency\n241\t}\n242\t\n243\tfunc (b *buffer) firstWrite() int64 {\n244\t\treturn b.start + (b.frequency / 2)\n245\t}\n246\t\n247\t// read retrieves time-series data from the buffer chain for the specified time range.\n248\t//\n249\t// Traverses the buffer chain backwards (via prev links) if 'from' precedes the current\n250\t// buffer's start. Missing data points are represented as NaN. Values are accumulated\n251\t// into the provided 'data' slice (using +=, so caller must zero-initialize if needed).\n252\t//\n253\t// The function adjusts the actual time range returned if data is unavailable at the\n254\t// boundaries (returned via adjusted from/to timestamps).\n255\t//\n256\t// Parameters:\n257\t//   - from: Start timestamp (Unix seconds)\n258\t//   - to:   End timestamp (Unix seconds, exclusive)\n259\t//   - data: Pre-allocated slice to accumulate results (must be large enough)\n260\t//\n261\t// Returns:\n262\t//   - []schema.Float: Slice of data (may be shorter than input 'data' slice)\n263\t//   - int64:          Actual start timestamp with available data\n264\t//   - int64:          Actual end timestamp (exclusive)\n265\t//   - error:          Non-nil on failure\n266\t//\n267\t// Panics if 'data' slice is too small to hold all values in [from, to).\n268\tfunc (b *buffer) read(from, to int64, data []schema.Float) ([]schema.Float, int64, int64, error) {\n269\t\t// Walk back to the buffer that covers 'from', adjusting if we hit the oldest.\n270\t\tfor from < b.firstWrite() {\n271\t\t\tif b.prev == nil {\n272\t\t\t\tfrom = b.firstWrite()\n273\t\t\t\tbreak\n274\t\t\t}\n275\t\t\tb = b.prev\n276\t\t}\n277\t\n278\t\ti := 0\n279\t\tt := from"}]},"uuid":"e08da265-1b52-4f7a-86ba-ff33a8cae3b9","timestamp":"2026-06-05T06:33:57.935Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/buffer.go","content":"//   - prev:      Link to older buffer in the chain (nil if this is oldest)\n//   - next:      Link to newer buffer in the chain (nil if this is newest/head)\n//   - data:      Time-series values (schema.Float supports NaN for missing data)\n//   - frequency: Measurement interval in seconds\n//   - start:     Start timestamp (adjusted by -frequency/2 for alignment)\n//   - archived:  True if data has been persisted to disk archive\n//   - closed:    True if buffer is no longer accepting writes\n//\n// Index calculation: index = (timestamp - start) / frequency\n// Actual data timestamp: start + (frequency / 2) + (index * frequency)\ntype buffer struct {\n\tprev      *buffer\n\tnext      *buffer\n\tdata      []schema.Float\n\tfrequency int64\n\tstart     int64\n\tarchived  bool\n\tclosed    bool\n\tlastUsed  int64\n}\n\nfunc newBuffer(ts, freq int64) *buffer {\n\tb := bufferPool.Get()\n\tb.frequency = freq\n\tb.start = ts - (freq / 2)\n\tb.prev = nil\n\tb.next = nil\n\tb.archived = false\n\tb.closed = false\n\tb.data = b.data[:0]\n\treturn b\n}\n\n// write appends a timestamped value to the buffer chain.\n//\n// Returns the head buffer (which may be newly created if capacity was reached).\n// Timestamps older than the buffer's start are rejected. If the calculated index\n// exceeds capacity, a new buffer is allocated and linked as the new head.\n//\n// Missing timestamps are automatically filled with NaN values to maintain alignment.\n// Overwrites are allowed if the index is already within the existing data slice.\n//\n// Parameters:\n//   - ts:    Unix timestamp in seconds\n//   - value: Metric value (can be schema.NaN for missing data)\n//\n// Returns:\n//   - *buffer: The new head buffer (same as b if no new buffer created)\n//   - error:   Non-nil if timestamp is before buffer start\nfunc (b *buffer) write(ts int64, value schema.Float) (*buffer, error) {\n\tif ts < b.start {\n\t\treturn nil, errors.New(\"[METRICSTORE]> cannot write value to buffer from past\")\n\t}\n\n\t// idx := int((ts - b.start + (b.frequency / 3)) / b.frequency)\n\tidx := int((ts - b.start) / b.frequency)\n\tif idx >= cap(b.data) {\n\t\tnewbuf := newBuffer(ts, b.frequency)\n\t\tnewbuf.prev = b\n\t\tb.next = newbuf\n\t\tb = newbuf\n\t\tidx = 0\n\t}\n\n\t// Overwriting value or writing value from past\n\tif idx < len(b.data) {\n\t\tb.data[idx] = value\n\t\treturn b, nil\n\t}\n\n\t// Fill up unwritten slots with NaN\n\tfor i := len(b.data); i < idx; i++ {\n\t\tb.data = append(b.data, schema.NaN)\n\t}\n\n\tb.data = append(b.data, value)\n\treturn b, nil\n}\n\nfunc (b *buffer) end() int64 {\n\treturn b.firstWrite() + int64(len(b.data))*b.frequency\n}\n\nfunc (b *buffer) firstWrite() int64 {\n\treturn b.start + (b.frequency / 2)\n}\n\n// read retrieves time-series data from the buffer chain for the specified time range.\n//\n// Traverses the buffer chain backwards (via prev links) if 'from' precedes the current\n// buffer's start. Missing data points are represented as NaN. Values are accumulated\n// into the provided 'data' slice (using +=, so caller must zero-initialize if needed).\n//\n// The function adjusts the actual time range returned if data is unavailable at the\n// boundaries (returned via adjusted from/to timestamps).\n//\n// Parameters:\n//   - from: Start timestamp (Unix seconds)\n//   - to:   End timestamp (Unix seconds, exclusive)\n//   - data: Pre-allocated slice to accumulate results (must be large enough)\n//\n// Returns:\n//   - []schema.Float: Slice of data (may be shorter than input 'data' slice)\n//   - int64:          Actual start timestamp with available data\n//   - int64:          Actual end timestamp (exclusive)\n//   - error:          Non-nil on failure\n//\n// Panics if 'data' slice is too small to hold all values in [from, to).\nfunc (b *buffer) read(from, to int64, data []schema.Float) ([]schema.Float, int64, int64, error) {\n\t// Walk back to the buffer that covers 'from', adjusting if we hit the oldest.\n\tfor from < b.firstWrite() {\n\t\tif b.prev == nil {\n\t\t\tfrom = b.firstWrite()\n\t\t\tbreak\n\t\t}\n\t\tb = b.prev\n\t}\n\n\ti := 0\n\tt := from","numLines":120,"startLine":160,"totalLines":422}},"sourceToolAssistantUUID":"c11484a5-2041-4db4-b3d7-7d54d16d6269","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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+{"parentUuid":"5ffcdb61-e574-4914-920b-480765a8d7ea","isSidechain":false,"promptId":"bf1a2a8c-5f1a-4688-91c9-f9d2413ee03d","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01Amumq2VB1wnguBLQwVm5Cx","type":"tool_result","content":"641dc0e3 Run gofumpt\n66707bbf Update metricstore documentation\nfc47b12f fix: Pause WAL writes during binary checkpoint to prevent message drops\n937984d1 fix: WAL rotation skipped for all nodes due to non-blocking send on small channel\ncc3d03bb fix: Unbound growth of wal files in case of checkpointing error\nac0a4cc3 Increase shutdown timeouts and WAL flush interval\n97d65a9e Fix bugs in WAL journal pipeline\ne7598100 Add shutdown timings. Do not drain WAL buffers on shutdown\n6f7dda53 Cleanup\n0325d9e8 fix: Increase throughput for WAL writers\nbf1a8a17 fix: Shard WAL consumer for higher throughput\n50aed595 fix: metricstore NATS contention\n39ab1278 Make checkpointInterval an option config option again.\nb214e175 Add buffered I/O to WAL writes and fix MemoryCap comment\n39635ea1 Cleanup metricstore options\n=== lineprotocol WAL send ===\n18://     goroutine via the WALMessages channel for durable write-ahead logging.\n128:// walDropped counts WAL messages dropped due to a full channel.\n130:var walDropped atomic.Int64\n141:\t// selector is the sub-device path passed to WriteToLevel and WALMessage\n198:// sent to WALMessages so the WAL staging goroutine can persist it durably\n377:\t\tif Keys.Checkpoints.FileFormat == \"wal\" {\n378:\t\t\tmsg := &WALMessage{\n386:\t\t\tif !SendWALMessage(msg) {\n389:\t\t\t\tif dropped := walDropped.Add(1); dropped%10000 == 1 {","is_error":false}]},"uuid":"b7a05831-5352-46bb-aec5-e08f8bdeef56","timestamp":"2026-06-05T06:35:03.771Z","toolUseResult":{"stdout":"641dc0e3 Run gofumpt\n66707bbf Update metricstore documentation\nfc47b12f fix: Pause WAL writes during binary checkpoint to prevent message drops\n937984d1 fix: WAL rotation skipped for all nodes due to non-blocking send on small channel\ncc3d03bb fix: Unbound growth of wal files in case of checkpointing error\nac0a4cc3 Increase shutdown timeouts and WAL flush interval\n97d65a9e Fix bugs in WAL journal pipeline\ne7598100 Add shutdown timings. Do not drain WAL buffers on shutdown\n6f7dda53 Cleanup\n0325d9e8 fix: Increase throughput for WAL writers\nbf1a8a17 fix: Shard WAL consumer for higher throughput\n50aed595 fix: metricstore NATS contention\n39ab1278 Make checkpointInterval an option config option again.\nb214e175 Add buffered I/O to WAL writes and fix MemoryCap comment\n39635ea1 Cleanup metricstore options\n=== lineprotocol WAL send ===\n18://     goroutine via the WALMessages channel for durable write-ahead logging.\n128:// walDropped counts WAL messages dropped due to a full channel.\n130:var walDropped atomic.Int64\n141:\t// selector is the sub-device path passed to WriteToLevel and WALMessage\n198:// sent to WALMessages so the WAL staging goroutine can persist it durably\n377:\t\tif Keys.Checkpoints.FileFormat == \"wal\" {\n378:\t\t\tmsg := &WALMessage{\n386:\t\t\tif !SendWALMessage(msg) {\n389:\t\t\t\tif dropped := walDropped.Add(1); dropped%10000 == 1 {","stderr":"","interrupted":false,"isImage":false,"noOutputExpected":false},"sourceToolAssistantUUID":"5ffcdb61-e574-4914-920b-480765a8d7ea","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"type":"last-prompt","lastPrompt":"This application uses a files based checkpointing mechanism using a WAL algorithm for crash recovery. Analyse when the wal files are reset. Currently the wal files are not reset and continously grow a…","leafUuid":"b7a05831-5352-46bb-aec5-e08f8bdeef56","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63"}
+{"type":"ai-title","aiTitle":"Analyze WAL file reset mechanism in checkpoint system","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63"}
+{"type":"mode","mode":"normal","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63"}
+{"type":"permission-mode","permissionMode":"plan","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63"}
+{"parentUuid":"b7a05831-5352-46bb-aec5-e08f8bdeef56","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_01FtP8QD13m58ayRkxvYMUSt","type":"message","role":"assistant","content":[{"type":"thinking","thinking":"","signature":"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"}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":5701,"cache_read_input_tokens":74976,"output_tokens":237,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":5701,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":2,"output_tokens":237,"cache_read_input_tokens":74976,"cache_creation_input_tokens":5701,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":5701},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011CbjeZQ1hmfZuZK4DNims9","type":"assistant","uuid":"0bad265b-554e-452b-b636-72869d56cea9","timestamp":"2026-06-05T06:35:07.431Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"0bad265b-554e-452b-b636-72869d56cea9","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_01FtP8QD13m58ayRkxvYMUSt","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01EP3rQPQwZSfieLcCETpWoU","name":"Bash","input":{"command":"git show cc3d03bb --stat; echo \"==========\"; git show cc3d03bb -- pkg/metricstore/checkpoint.go | head -120"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":5701,"cache_read_input_tokens":74976,"output_tokens":237,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":5701,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":2,"output_tokens":237,"cache_read_input_tokens":74976,"cache_creation_input_tokens":5701,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":5701},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011CbjeZQ1hmfZuZK4DNims9","type":"assistant","uuid":"820b3ea9-abca-48d5-8a6a-b4f018157c6f","timestamp":"2026-06-05T06:35:07.675Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"820b3ea9-abca-48d5-8a6a-b4f018157c6f","isSidechain":false,"promptId":"bf1a2a8c-5f1a-4688-91c9-f9d2413ee03d","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01EP3rQPQwZSfieLcCETpWoU","type":"tool_result","content":"commit cc3d03bb5b78c26b3dd2e04279b6206ed3753034\nAuthor: Jan Eitzinger <jan@moebiusband.org>\nDate:   Sat Mar 28 06:26:21 2026 +0100\n\n    fix: Unbound growth of wal files in case of checkpointing error\n    \n    Entire-Checkpoint: 95a89a7127c5\n\n ReleaseNotes.md                  | 10 ++++++++++\n pkg/metricstore/checkpoint.go    |  3 ++-\n pkg/metricstore/config.go        |  7 +++++--\n pkg/metricstore/configSchema.go  |  5 +++++\n pkg/metricstore/walCheckpoint.go | 40 ++++++++++++++++++++++++++++++++++------\n 5 files changed, 56 insertions(+), 9 deletions(-)\n==========\ncommit cc3d03bb5b78c26b3dd2e04279b6206ed3753034\nAuthor: Jan Eitzinger <jan@moebiusband.org>\nDate:   Sat Mar 28 06:26:21 2026 +0100\n\n    fix: Unbound growth of wal files in case of checkpointing error\n    \n    Entire-Checkpoint: 95a89a7127c5\n\ndiff --git a/pkg/metricstore/checkpoint.go b/pkg/metricstore/checkpoint.go\nindex 3627a67b..2dcb5733 100644\n--- a/pkg/metricstore/checkpoint.go\n+++ b/pkg/metricstore/checkpoint.go\n@@ -129,7 +129,8 @@ func Checkpointing(wg *sync.WaitGroup, ctx context.Context) {\n \t\t\t\t\tn, hostDirs, err := ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), now.Unix())\n \t\t\t\t\tif err != nil {\n \t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> binary checkpointing failed: %s\", err.Error())\n-\t\t\t\t\t} else {\n+\t\t\t\t\t}\n+\t\t\t\t\tif n > 0 {\n \t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> done: %d binary snapshot files created\", n)\n \t\t\t\t\t\tlastCheckpointMu.Lock()\n \t\t\t\t\t\tlastCheckpoint = now","is_error":false}]},"uuid":"8deb0934-6744-4e83-9418-c683fbc0c9a9","timestamp":"2026-06-05T06:35:07.753Z","toolUseResult":{"stdout":"commit cc3d03bb5b78c26b3dd2e04279b6206ed3753034\nAuthor: Jan Eitzinger <jan@moebiusband.org>\nDate:   Sat Mar 28 06:26:21 2026 +0100\n\n    fix: Unbound growth of wal files in case of checkpointing error\n    \n    Entire-Checkpoint: 95a89a7127c5\n\n ReleaseNotes.md                  | 10 ++++++++++\n pkg/metricstore/checkpoint.go    |  3 ++-\n pkg/metricstore/config.go        |  7 +++++--\n pkg/metricstore/configSchema.go  |  5 +++++\n pkg/metricstore/walCheckpoint.go | 40 ++++++++++++++++++++++++++++++++++------\n 5 files changed, 56 insertions(+), 9 deletions(-)\n==========\ncommit cc3d03bb5b78c26b3dd2e04279b6206ed3753034\nAuthor: Jan Eitzinger <jan@moebiusband.org>\nDate:   Sat Mar 28 06:26:21 2026 +0100\n\n    fix: Unbound growth of wal files in case of checkpointing error\n    \n    Entire-Checkpoint: 95a89a7127c5\n\ndiff --git a/pkg/metricstore/checkpoint.go b/pkg/metricstore/checkpoint.go\nindex 3627a67b..2dcb5733 100644\n--- a/pkg/metricstore/checkpoint.go\n+++ b/pkg/metricstore/checkpoint.go\n@@ -129,7 +129,8 @@ func Checkpointing(wg *sync.WaitGroup, ctx context.Context) {\n \t\t\t\t\tn, hostDirs, err := ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), now.Unix())\n \t\t\t\t\tif err != nil {\n \t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> binary checkpointing failed: %s\", err.Error())\n-\t\t\t\t\t} else {\n+\t\t\t\t\t}\n+\t\t\t\t\tif n > 0 {\n \t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> done: %d binary snapshot files created\", n)\n \t\t\t\t\t\tlastCheckpointMu.Lock()\n \t\t\t\t\t\tlastCheckpoint = now","stderr":"","interrupted":false,"isImage":false,"noOutputExpected":false},"sourceToolAssistantUUID":"820b3ea9-abca-48d5-8a6a-b4f018157c6f","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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+{"parentUuid":"1aa69c8f-59da-47c9-9ea8-110e6762e297","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_01GwQamZYtooY6qcLNYgrsnv","type":"message","role":"assistant","content":[{"type":"text","text":"I now have a definitive root cause. Let me write the plan.\n\nThe mechanism is clear:\n- **Periodic checkpoint** (`Checkpointing`, default every 12h): writes `.bin` snapshots, then calls `RotateWALFiles(successDirs)` → WAL reset works here.\n- **Force-rotate** when `ws.size >= MaxWALSize` — but `MaxWALSize` defaults to `0` (unlimited), so never fires by default.\n- **Shutdown** (`Shutdown()`): writes a final `.bin` snapshot via `ToCheckpointWAL`, but **discards the `successDirs` return (`_`) and never rotates the WAL**. The comment \"WAL files are deleted per-host inside ToCheckpointWAL workers\" is false — `ToCheckpointWAL`/`toCheckpointBinary` only write snapshots. The purpose-built helper `RotateWALFilesAfterShutdown` exists but is **never called anywhere**.\n\nSo after every clean shutdown the `current.wal` files survive, the next startup replays them *and keeps appending to the same files*, and they are never reset until a (12h-default) periodic checkpoint happens to run. That is exactly \"not reset and continuously grow after a start.\""}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":3002,"cache_read_input_tokens":81688,"output_tokens":5079,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":3002,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":2,"output_tokens":5079,"cache_read_input_tokens":81688,"cache_creation_input_tokens":3002,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":3002},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011Cbjec2pKcocXt8DnSE7Fn","type":"assistant","uuid":"21ea6897-90f1-4b25-a66a-a603eca70cfa","timestamp":"2026-06-05T06:36:14.114Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"21ea6897-90f1-4b25-a66a-a603eca70cfa","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_01GwQamZYtooY6qcLNYgrsnv","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_0121KshqpKzxw3EFCpCNAcii","name":"Write","input":{"file_path":"/Users/jan/.claude/plans/this-application-uses-a-shiny-flame.md","content":"# Fix: WAL files are never reset on shutdown (continuous growth across restarts)\n\n## Context\n\nThe metric store (`pkg/metricstore`) uses a WAL + periodic binary-snapshot\ncheckpoint scheme for crash recovery. Each host has an append-only\n`checkpoints/<cluster>/<host>/current.wal` that records every metric write, plus\nperiodic `<ts>.bin` full-tree snapshots. On startup the newest `.bin` is loaded\nand `current.wal` is replayed on top.\n\nA `current.wal` is only meant to hold writes *since the last snapshot*. Once a\nsnapshot is written, the WAL is redundant and must be rotated (deleted). The user\nreports that WAL files are never reset and grow without bound after a start.\n\n## Root cause\n\nWAL rotation happens in exactly these places today:\n\n1. **Periodic checkpoint** — `Checkpointing()` in `pkg/metricstore/checkpoint.go:128-145`\n   writes snapshots via `ToCheckpointWAL`, then calls `RotateWALFiles(hostDirs)`\n   for the hosts that got a fresh snapshot. This path works, but the default\n   `checkpoint-interval` is **12h**, so the WAL grows for up to 12h between resets.\n2. **Force-rotate on size** — in `WALStaging`/`processMsg`\n   (`pkg/metricstore/walCheckpoint.go:255`) when `ws.size >= MaxWALSize`. But\n   `MaxWALSize` (`config.go:69`) defaults to `0` = unlimited, so this never fires\n   unless explicitly configured.\n3. **Shutdown** — `Shutdown()` in `pkg/metricstore/metricstore.go:310-315`.\n\nThe **shutdown path is broken**. It writes a final snapshot but never rotates the\nWAL:\n\n```go\nif Keys.Checkpoints.FileFormat == \"wal\" {\n    // WAL files are deleted per-host inside ToCheckpointWAL workers.   <-- FALSE\n    files, _, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n}\n```\n\n- The comment is incorrect: `ToCheckpointWAL` / `toCheckpointBinary`\n  (`walCheckpoint.go:667`, `:768`) only write `.bin` snapshots; they do **not**\n  touch `current.wal`.\n- The second return value (`successDirs` — hosts that got a fresh snapshot) is\n  discarded with `_`.\n- The purpose-built helper `RotateWALFilesAfterShutdown(hostDirs)`\n  (`walCheckpoint.go:406`), which directly `os.Remove`s `current.wal` files after\n  the staging goroutines have exited, is **defined but never called** (verified by\n  grep across `cmd/`, `internal/`, `pkg/`).\n\nConsequence: after each clean shutdown the `current.wal` files remain on disk. On\nthe next startup they are replayed (redundantly, since the `.bin` already has that\ndata) and then **appended to again** (the staging goroutine opens the existing\nfile with `O_APPEND`). Across restarts the WAL grows monotonically and is only\never reset if a 12h periodic checkpoint happens to run. This is the reported\n\"not reset / continuously grows after a start\" behavior.\n\nNote on ordering: in `Shutdown()` the WAL staging goroutines are already stopped\n(channels closed + `WaitForWALStagingDrain()`) *before* the final\n`ToCheckpointWAL`. So the channel-based `RotateWALFiles` is unsafe here — that is\nexactly why the direct-removal `RotateWALFilesAfterShutdown` variant exists.\n\n## Fix\n\nIn `pkg/metricstore/metricstore.go`, `Shutdown()` (the `FileFormat == \"wal\"`\nbranch, ~line 310): capture the `successDirs` return from `ToCheckpointWAL` and\nrotate those WAL files after the snapshot is durably written.\n\n```go\nif Keys.Checkpoints.FileFormat == \"wal\" {\n    var successDirs []string\n    files, successDirs, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n    // Staging goroutines have already exited, so remove the now-redundant\n    // current.wal files directly (channel-based RotateWALFiles is unsafe here).\n    RotateWALFilesAfterShutdown(successDirs)\n} else {\n    files, err = ms.ToCheckpoint(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n}\n```\n\nRotate **only `successDirs`** (hosts that received a fresh snapshot), mirroring the\nperiodic path. A host that produced no snapshot (`ErrNoNewArchiveData`) had no new\nunarchived data for the window, so its WAL is left untouched to avoid dropping any\nrecord not yet captured by a snapshot. Remove/replace the misleading comment.\n\n### Files\n- `pkg/metricstore/metricstore.go` — `Shutdown()` WAL branch (only change needed).\n\n### Reused existing code\n- `RotateWALFilesAfterShutdown([]string)` — `pkg/metricstore/walCheckpoint.go:406`\n  (already implemented; just needs to be wired in).\n- `successDirs` return of `ToCheckpointWAL` — `walCheckpoint.go:667`.\n\n## Verification\n\n1. Build: `go build ./...`\n2. Targeted unit test (add to `pkg/metricstore`): write a few metrics so a host\n   WAL exists, run a checkpoint + `Shutdown()` equivalent, then assert\n   `current.wal` no longer exists (or is recreated empty) for hosts that were\n   snapshotted. Run `go test ./pkg/metricstore/...`.\n3. Manual end-to-end:\n   - Configure `checkpoints.file-format: \"wal\"` (default) with a short\n     `checkpoint-interval` is *not* required for this test.\n   - Start `cc-backend`, ingest some metrics, confirm\n     `var/checkpoints/<cluster>/<host>/current.wal` grows.\n   - Stop the server (graceful shutdown) and confirm a new `<ts>.bin` appears and\n     `current.wal` is gone for active hosts.\n   - Restart, ingest more, stop again — confirm the WAL does not accumulate the\n     previous run's bytes (size resets each clean shutdown rather than growing\n     monotonically).\n\n## Out of scope / follow-ups (mention only)\n- The 12h default `checkpoint-interval` still bounds in-run WAL growth; operators\n  who want tighter bounds can lower it or set `checkpoints.max-wal-size`. No code\n  change proposed here unless requested.\n"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":3002,"cache_read_input_tokens":81688,"output_tokens":5079,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":3002,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":2,"output_tokens":5079,"cache_read_input_tokens":81688,"cache_creation_input_tokens":3002,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":3002},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011Cbjec2pKcocXt8DnSE7Fn","type":"assistant","uuid":"c89103d9-2fb1-4b3a-ba7a-d6bf35deba3a","timestamp":"2026-06-05T06:36:40.776Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"c89103d9-2fb1-4b3a-ba7a-d6bf35deba3a","isSidechain":false,"promptId":"bf1a2a8c-5f1a-4688-91c9-f9d2413ee03d","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_0121KshqpKzxw3EFCpCNAcii","type":"tool_result","content":"File created successfully at: /Users/jan/.claude/plans/this-application-uses-a-shiny-flame.md (file state is current in your context — no need to Read it back)"}]},"uuid":"a228e29f-73f4-4773-a405-0100a492cb18","timestamp":"2026-06-05T06:36:40.803Z","toolUseResult":{"type":"create","filePath":"/Users/jan/.claude/plans/this-application-uses-a-shiny-flame.md","content":"# Fix: WAL files are never reset on shutdown (continuous growth across restarts)\n\n## Context\n\nThe metric store (`pkg/metricstore`) uses a WAL + periodic binary-snapshot\ncheckpoint scheme for crash recovery. Each host has an append-only\n`checkpoints/<cluster>/<host>/current.wal` that records every metric write, plus\nperiodic `<ts>.bin` full-tree snapshots. On startup the newest `.bin` is loaded\nand `current.wal` is replayed on top.\n\nA `current.wal` is only meant to hold writes *since the last snapshot*. Once a\nsnapshot is written, the WAL is redundant and must be rotated (deleted). The user\nreports that WAL files are never reset and grow without bound after a start.\n\n## Root cause\n\nWAL rotation happens in exactly these places today:\n\n1. **Periodic checkpoint** — `Checkpointing()` in `pkg/metricstore/checkpoint.go:128-145`\n   writes snapshots via `ToCheckpointWAL`, then calls `RotateWALFiles(hostDirs)`\n   for the hosts that got a fresh snapshot. This path works, but the default\n   `checkpoint-interval` is **12h**, so the WAL grows for up to 12h between resets.\n2. **Force-rotate on size** — in `WALStaging`/`processMsg`\n   (`pkg/metricstore/walCheckpoint.go:255`) when `ws.size >= MaxWALSize`. But\n   `MaxWALSize` (`config.go:69`) defaults to `0` = unlimited, so this never fires\n   unless explicitly configured.\n3. **Shutdown** — `Shutdown()` in `pkg/metricstore/metricstore.go:310-315`.\n\nThe **shutdown path is broken**. It writes a final snapshot but never rotates the\nWAL:\n\n```go\nif Keys.Checkpoints.FileFormat == \"wal\" {\n    // WAL files are deleted per-host inside ToCheckpointWAL workers.   <-- FALSE\n    files, _, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n}\n```\n\n- The comment is incorrect: `ToCheckpointWAL` / `toCheckpointBinary`\n  (`walCheckpoint.go:667`, `:768`) only write `.bin` snapshots; they do **not**\n  touch `current.wal`.\n- The second return value (`successDirs` — hosts that got a fresh snapshot) is\n  discarded with `_`.\n- The purpose-built helper `RotateWALFilesAfterShutdown(hostDirs)`\n  (`walCheckpoint.go:406`), which directly `os.Remove`s `current.wal` files after\n  the staging goroutines have exited, is **defined but never called** (verified by\n  grep across `cmd/`, `internal/`, `pkg/`).\n\nConsequence: after each clean shutdown the `current.wal` files remain on disk. On\nthe next startup they are replayed (redundantly, since the `.bin` already has that\ndata) and then **appended to again** (the staging goroutine opens the existing\nfile with `O_APPEND`). Across restarts the WAL grows monotonically and is only\never reset if a 12h periodic checkpoint happens to run. This is the reported\n\"not reset / continuously grows after a start\" behavior.\n\nNote on ordering: in `Shutdown()` the WAL staging goroutines are already stopped\n(channels closed + `WaitForWALStagingDrain()`) *before* the final\n`ToCheckpointWAL`. So the channel-based `RotateWALFiles` is unsafe here — that is\nexactly why the direct-removal `RotateWALFilesAfterShutdown` variant exists.\n\n## Fix\n\nIn `pkg/metricstore/metricstore.go`, `Shutdown()` (the `FileFormat == \"wal\"`\nbranch, ~line 310): capture the `successDirs` return from `ToCheckpointWAL` and\nrotate those WAL files after the snapshot is durably written.\n\n```go\nif Keys.Checkpoints.FileFormat == \"wal\" {\n    var successDirs []string\n    files, successDirs, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n    // Staging goroutines have already exited, so remove the now-redundant\n    // current.wal files directly (channel-based RotateWALFiles is unsafe here).\n    RotateWALFilesAfterShutdown(successDirs)\n} else {\n    files, err = ms.ToCheckpoint(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n}\n```\n\nRotate **only `successDirs`** (hosts that received a fresh snapshot), mirroring the\nperiodic path. A host that produced no snapshot (`ErrNoNewArchiveData`) had no new\nunarchived data for the window, so its WAL is left untouched to avoid dropping any\nrecord not yet captured by a snapshot. Remove/replace the misleading comment.\n\n### Files\n- `pkg/metricstore/metricstore.go` — `Shutdown()` WAL branch (only change needed).\n\n### Reused existing code\n- `RotateWALFilesAfterShutdown([]string)` — `pkg/metricstore/walCheckpoint.go:406`\n  (already implemented; just needs to be wired in).\n- `successDirs` return of `ToCheckpointWAL` — `walCheckpoint.go:667`.\n\n## Verification\n\n1. Build: `go build ./...`\n2. Targeted unit test (add to `pkg/metricstore`): write a few metrics so a host\n   WAL exists, run a checkpoint + `Shutdown()` equivalent, then assert\n   `current.wal` no longer exists (or is recreated empty) for hosts that were\n   snapshotted. Run `go test ./pkg/metricstore/...`.\n3. Manual end-to-end:\n   - Configure `checkpoints.file-format: \"wal\"` (default) with a short\n     `checkpoint-interval` is *not* required for this test.\n   - Start `cc-backend`, ingest some metrics, confirm\n     `var/checkpoints/<cluster>/<host>/current.wal` grows.\n   - Stop the server (graceful shutdown) and confirm a new `<ts>.bin` appears and\n     `current.wal` is gone for active hosts.\n   - Restart, ingest more, stop again — confirm the WAL does not accumulate the\n     previous run's bytes (size resets each clean shutdown rather than growing\n     monotonically).\n\n## Out of scope / follow-ups (mention only)\n- The 12h default `checkpoint-interval` still bounds in-run WAL growth; operators\n  who want tighter bounds can lower it or set `checkpoints.max-wal-size`. No code\n  change proposed here unless requested.\n","structuredPatch":[],"originalFile":null,"userModified":false},"sourceToolAssistantUUID":"c89103d9-2fb1-4b3a-ba7a-d6bf35deba3a","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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+{"parentUuid":"fe780238-3cdd-473f-a8b1-6c2c515aad4c","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_012nFx1mWrxdA1xKfBngTJXn","type":"message","role":"assistant","content":[{"type":"text","text":"## Analysis: when are WAL files reset\n\nWAL rotation (deletion of `current.wal`) happens in only three places:\n\n1. **Periodic checkpoint** — `Checkpointing()` (`checkpoint.go:128-145`) writes `.bin` snapshots, then `RotateWALFiles(successDirs)`. ✅ works, but default `checkpoint-interval` is **12h**.\n2. **Size cap** — force-rotate when `ws.size >= MaxWALSize` (`walCheckpoint.go:255`). But `max-wal-size` defaults to **0 = unlimited**, so it never fires by default.\n3. **Shutdown** — `Shutdown()` (`metricstore.go:310-315`). **Broken.**\n\nThe bug is in shutdown. It writes a final snapshot but never rotates:\n\n```go\n// WAL files are deleted per-host inside ToCheckpointWAL workers.   ← FALSE\nfiles, _, err = ms.ToCheckpointWAL(...)\n```\n\n`ToCheckpointWAL` only writes `.bin` files — it does not touch `current.wal`. The `successDirs` return is thrown away (`_`), and the dedicated helper `RotateWALFilesAfterShutdown()` (`walCheckpoint.go:406`) exists but is **never called anywhere** (confirmed by grep). So after each clean shutdown the `current.wal` files survive; the next startup replays them *and keeps appending to the same files* (opened `O_APPEND`). They only ever reset if a 12h periodic checkpoint happens to run — exactly the \"not reset / continuously grows after a start\" you observed.\n\nThe fix is small: in `Shutdown()`, capture `successDirs` and call `RotateWALFilesAfterShutdown(successDirs)` after the final snapshot (the staging goroutines are already stopped, which is why the direct-removal variant exists). Full details, verification steps, and reasoning are in the plan."}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":74884,"cache_read_input_tokens":16048,"output_tokens":705,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":74884,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":2,"output_tokens":705,"cache_read_input_tokens":16048,"cache_creation_input_tokens":74884,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":74884},"type":"message"}],"speed":"standard"},"diagnostics":{"cache_miss_reason":{"type":"tools_changed","cache_missed_input_tokens":74919}}},"requestId":"req_011Cbjeh4PiVV1WyvrR3yHHJ","type":"assistant","uuid":"571e7796-d9f6-43bf-9d47-ff6adfa3b7d0","timestamp":"2026-06-05T06:36:58.373Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"571e7796-d9f6-43bf-9d47-ff6adfa3b7d0","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_012nFx1mWrxdA1xKfBngTJXn","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01A3rwF58C6toTnjkQjAh9nX","name":"ExitPlanMode","input":{"plan":"# Fix: WAL files are never reset on shutdown (continuous growth across restarts)\n\n## Context\n\nThe metric store (`pkg/metricstore`) uses a WAL + periodic binary-snapshot\ncheckpoint scheme for crash recovery. Each host has an append-only\n`checkpoints/<cluster>/<host>/current.wal` that records every metric write, plus\nperiodic `<ts>.bin` full-tree snapshots. On startup the newest `.bin` is loaded\nand `current.wal` is replayed on top.\n\nA `current.wal` is only meant to hold writes *since the last snapshot*. Once a\nsnapshot is written, the WAL is redundant and must be rotated (deleted). The user\nreports that WAL files are never reset and grow without bound after a start.\n\n## Root cause\n\nWAL rotation happens in exactly these places today:\n\n1. **Periodic checkpoint** — `Checkpointing()` in `pkg/metricstore/checkpoint.go:128-145`\n   writes snapshots via `ToCheckpointWAL`, then calls `RotateWALFiles(hostDirs)`\n   for the hosts that got a fresh snapshot. This path works, but the default\n   `checkpoint-interval` is **12h**, so the WAL grows for up to 12h between resets.\n2. **Force-rotate on size** — in `WALStaging`/`processMsg`\n   (`pkg/metricstore/walCheckpoint.go:255`) when `ws.size >= MaxWALSize`. But\n   `MaxWALSize` (`config.go:69`) defaults to `0` = unlimited, so this never fires\n   unless explicitly configured.\n3. **Shutdown** — `Shutdown()` in `pkg/metricstore/metricstore.go:310-315`.\n\nThe **shutdown path is broken**. It writes a final snapshot but never rotates the\nWAL:\n\n```go\nif Keys.Checkpoints.FileFormat == \"wal\" {\n    // WAL files are deleted per-host inside ToCheckpointWAL workers.   <-- FALSE\n    files, _, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n}\n```\n\n- The comment is incorrect: `ToCheckpointWAL` / `toCheckpointBinary`\n  (`walCheckpoint.go:667`, `:768`) only write `.bin` snapshots; they do **not**\n  touch `current.wal`.\n- The second return value (`successDirs` — hosts that got a fresh snapshot) is\n  discarded with `_`.\n- The purpose-built helper `RotateWALFilesAfterShutdown(hostDirs)`\n  (`walCheckpoint.go:406`), which directly `os.Remove`s `current.wal` files after\n  the staging goroutines have exited, is **defined but never called** (verified by\n  grep across `cmd/`, `internal/`, `pkg/`).\n\nConsequence: after each clean shutdown the `current.wal` files remain on disk. On\nthe next startup they are replayed (redundantly, since the `.bin` already has that\ndata) and then **appended to again** (the staging goroutine opens the existing\nfile with `O_APPEND`). Across restarts the WAL grows monotonically and is only\never reset if a 12h periodic checkpoint happens to run. This is the reported\n\"not reset / continuously grows after a start\" behavior.\n\nNote on ordering: in `Shutdown()` the WAL staging goroutines are already stopped\n(channels closed + `WaitForWALStagingDrain()`) *before* the final\n`ToCheckpointWAL`. So the channel-based `RotateWALFiles` is unsafe here — that is\nexactly why the direct-removal `RotateWALFilesAfterShutdown` variant exists.\n\n## Fix\n\nIn `pkg/metricstore/metricstore.go`, `Shutdown()` (the `FileFormat == \"wal\"`\nbranch, ~line 310): capture the `successDirs` return from `ToCheckpointWAL` and\nrotate those WAL files after the snapshot is durably written.\n\n```go\nif Keys.Checkpoints.FileFormat == \"wal\" {\n    var successDirs []string\n    files, successDirs, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n    // Staging goroutines have already exited, so remove the now-redundant\n    // current.wal files directly (channel-based RotateWALFiles is unsafe here).\n    RotateWALFilesAfterShutdown(successDirs)\n} else {\n    files, err = ms.ToCheckpoint(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n}\n```\n\nRotate **only `successDirs`** (hosts that received a fresh snapshot), mirroring the\nperiodic path. A host that produced no snapshot (`ErrNoNewArchiveData`) had no new\nunarchived data for the window, so its WAL is left untouched to avoid dropping any\nrecord not yet captured by a snapshot. Remove/replace the misleading comment.\n\n### Files\n- `pkg/metricstore/metricstore.go` — `Shutdown()` WAL branch (only change needed).\n\n### Reused existing code\n- `RotateWALFilesAfterShutdown([]string)` — `pkg/metricstore/walCheckpoint.go:406`\n  (already implemented; just needs to be wired in).\n- `successDirs` return of `ToCheckpointWAL` — `walCheckpoint.go:667`.\n\n## Verification\n\n1. Build: `go build ./...`\n2. Targeted unit test (add to `pkg/metricstore`): write a few metrics so a host\n   WAL exists, run a checkpoint + `Shutdown()` equivalent, then assert\n   `current.wal` no longer exists (or is recreated empty) for hosts that were\n   snapshotted. Run `go test ./pkg/metricstore/...`.\n3. Manual end-to-end:\n   - Configure `checkpoints.file-format: \"wal\"` (default) with a short\n     `checkpoint-interval` is *not* required for this test.\n   - Start `cc-backend`, ingest some metrics, confirm\n     `var/checkpoints/<cluster>/<host>/current.wal` grows.\n   - Stop the server (graceful shutdown) and confirm a new `<ts>.bin` appears and\n     `current.wal` is gone for active hosts.\n   - Restart, ingest more, stop again — confirm the WAL does not accumulate the\n     previous run's bytes (size resets each clean shutdown rather than growing\n     monotonically).\n\n## Out of scope / follow-ups (mention only)\n- The 12h default `checkpoint-interval` still bounds in-run WAL growth; operators\n  who want tighter bounds can lower it or set `checkpoints.max-wal-size`. No code\n  change proposed here unless requested.\n","planFilePath":"/Users/jan/.claude/plans/this-application-uses-a-shiny-flame.md"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":74884,"cache_read_input_tokens":16048,"output_tokens":705,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":74884,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":2,"output_tokens":705,"cache_read_input_tokens":16048,"cache_creation_input_tokens":74884,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":74884},"type":"message"}],"speed":"standard"},"diagnostics":{"cache_miss_reason":{"type":"tools_changed","cache_missed_input_tokens":74919}}},"requestId":"req_011Cbjeh4PiVV1WyvrR3yHHJ","type":"assistant","uuid":"9643ca2e-b89a-4220-a42a-fac51f89f8c4","timestamp":"2026-06-05T06:36:58.424Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"9643ca2e-b89a-4220-a42a-fac51f89f8c4","isSidechain":false,"promptId":"bf1a2a8c-5f1a-4688-91c9-f9d2413ee03d","type":"user","message":{"role":"user","content":[{"type":"tool_result","content":"User has approved your plan. You can now start coding. Start with updating your todo list if applicable\n\nYour plan has been saved to: /Users/jan/.claude/plans/this-application-uses-a-shiny-flame.md\nYou can refer back to it if needed during implementation.\n\n## Approved Plan:\n# Fix: WAL files are never reset on shutdown (continuous growth across restarts)\n\n## Context\n\nThe metric store (`pkg/metricstore`) uses a WAL + periodic binary-snapshot\ncheckpoint scheme for crash recovery. Each host has an append-only\n`checkpoints/<cluster>/<host>/current.wal` that records every metric write, plus\nperiodic `<ts>.bin` full-tree snapshots. On startup the newest `.bin` is loaded\nand `current.wal` is replayed on top.\n\nA `current.wal` is only meant to hold writes *since the last snapshot*. Once a\nsnapshot is written, the WAL is redundant and must be rotated (deleted). The user\nreports that WAL files are never reset and grow without bound after a start.\n\n## Root cause\n\nWAL rotation happens in exactly these places today:\n\n1. **Periodic checkpoint** — `Checkpointing()` in `pkg/metricstore/checkpoint.go:128-145`\n   writes snapshots via `ToCheckpointWAL`, then calls `RotateWALFiles(hostDirs)`\n   for the hosts that got a fresh snapshot. This path works, but the default\n   `checkpoint-interval` is **12h**, so the WAL grows for up to 12h between resets.\n2. **Force-rotate on size** — in `WALStaging`/`processMsg`\n   (`pkg/metricstore/walCheckpoint.go:255`) when `ws.size >= MaxWALSize`. But\n   `MaxWALSize` (`config.go:69`) defaults to `0` = unlimited, so this never fires\n   unless explicitly configured.\n3. **Shutdown** — `Shutdown()` in `pkg/metricstore/metricstore.go:310-315`.\n\nThe **shutdown path is broken**. It writes a final snapshot but never rotates the\nWAL:\n\n```go\nif Keys.Checkpoints.FileFormat == \"wal\" {\n    // WAL files are deleted per-host inside ToCheckpointWAL workers.   <-- FALSE\n    files, _, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n}\n```\n\n- The comment is incorrect: `ToCheckpointWAL` / `toCheckpointBinary`\n  (`walCheckpoint.go:667`, `:768`) only write `.bin` snapshots; they do **not**\n  touch `current.wal`.\n- The second return value (`successDirs` — hosts that got a fresh snapshot) is\n  discarded with `_`.\n- The purpose-built helper `RotateWALFilesAfterShutdown(hostDirs)`\n  (`walCheckpoint.go:406`), which directly `os.Remove`s `current.wal` files after\n  the staging goroutines have exited, is **defined but never called** (verified by\n  grep across `cmd/`, `internal/`, `pkg/`).\n\nConsequence: after each clean shutdown the `current.wal` files remain on disk. On\nthe next startup they are replayed (redundantly, since the `.bin` already has that\ndata) and then **appended to again** (the staging goroutine opens the existing\nfile with `O_APPEND`). Across restarts the WAL grows monotonically and is only\never reset if a 12h periodic checkpoint happens to run. This is the reported\n\"not reset / continuously grows after a start\" behavior.\n\nNote on ordering: in `Shutdown()` the WAL staging goroutines are already stopped\n(channels closed + `WaitForWALStagingDrain()`) *before* the final\n`ToCheckpointWAL`. So the channel-based `RotateWALFiles` is unsafe here — that is\nexactly why the direct-removal `RotateWALFilesAfterShutdown` variant exists.\n\n## Fix\n\nIn `pkg/metricstore/metricstore.go`, `Shutdown()` (the `FileFormat == \"wal\"`\nbranch, ~line 310): capture the `successDirs` return from `ToCheckpointWAL` and\nrotate those WAL files after the snapshot is durably written.\n\n```go\nif Keys.Checkpoints.FileFormat == \"wal\" {\n    var successDirs []string\n    files, successDirs, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n    // Staging goroutines have already exited, so remove the now-redundant\n    // current.wal files directly (channel-based RotateWALFiles is unsafe here).\n    RotateWALFilesAfterShutdown(successDirs)\n} else {\n    files, err = ms.ToCheckpoint(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n}\n```\n\nRotate **only `successDirs`** (hosts that received a fresh snapshot), mirroring the\nperiodic path. A host that produced no snapshot (`ErrNoNewArchiveData`) had no new\nunarchived data for the window, so its WAL is left untouched to avoid dropping any\nrecord not yet captured by a snapshot. Remove/replace the misleading comment.\n\n### Files\n- `pkg/metricstore/metricstore.go` — `Shutdown()` WAL branch (only change needed).\n\n### Reused existing code\n- `RotateWALFilesAfterShutdown([]string)` — `pkg/metricstore/walCheckpoint.go:406`\n  (already implemented; just needs to be wired in).\n- `successDirs` return of `ToCheckpointWAL` — `walCheckpoint.go:667`.\n\n## Verification\n\n1. Build: `go build ./...`\n2. Targeted unit test (add to `pkg/metricstore`): write a few metrics so a host\n   WAL exists, run a checkpoint + `Shutdown()` equivalent, then assert\n   `current.wal` no longer exists (or is recreated empty) for hosts that were\n   snapshotted. Run `go test ./pkg/metricstore/...`.\n3. Manual end-to-end:\n   - Configure `checkpoints.file-format: \"wal\"` (default) with a short\n     `checkpoint-interval` is *not* required for this test.\n   - Start `cc-backend`, ingest some metrics, confirm\n     `var/checkpoints/<cluster>/<host>/current.wal` grows.\n   - Stop the server (graceful shutdown) and confirm a new `<ts>.bin` appears and\n     `current.wal` is gone for active hosts.\n   - Restart, ingest more, stop again — confirm the WAL does not accumulate the\n     previous run's bytes (size resets each clean shutdown rather than growing\n     monotonically).\n\n## Out of scope / follow-ups (mention only)\n- The 12h default `checkpoint-interval` still bounds in-run WAL growth; operators\n  who want tighter bounds can lower it or set `checkpoints.max-wal-size`. No code\n  change proposed here unless requested.\n","tool_use_id":"toolu_01A3rwF58C6toTnjkQjAh9nX"}]},"uuid":"708b268f-f868-4386-a4de-dcc0c312e76f","timestamp":"2026-06-05T06:37:24.032Z","toolUseResult":{"plan":"# Fix: WAL files are never reset on shutdown (continuous growth across restarts)\n\n## Context\n\nThe metric store (`pkg/metricstore`) uses a WAL + periodic binary-snapshot\ncheckpoint scheme for crash recovery. Each host has an append-only\n`checkpoints/<cluster>/<host>/current.wal` that records every metric write, plus\nperiodic `<ts>.bin` full-tree snapshots. On startup the newest `.bin` is loaded\nand `current.wal` is replayed on top.\n\nA `current.wal` is only meant to hold writes *since the last snapshot*. Once a\nsnapshot is written, the WAL is redundant and must be rotated (deleted). The user\nreports that WAL files are never reset and grow without bound after a start.\n\n## Root cause\n\nWAL rotation happens in exactly these places today:\n\n1. **Periodic checkpoint** — `Checkpointing()` in `pkg/metricstore/checkpoint.go:128-145`\n   writes snapshots via `ToCheckpointWAL`, then calls `RotateWALFiles(hostDirs)`\n   for the hosts that got a fresh snapshot. This path works, but the default\n   `checkpoint-interval` is **12h**, so the WAL grows for up to 12h between resets.\n2. **Force-rotate on size** — in `WALStaging`/`processMsg`\n   (`pkg/metricstore/walCheckpoint.go:255`) when `ws.size >= MaxWALSize`. But\n   `MaxWALSize` (`config.go:69`) defaults to `0` = unlimited, so this never fires\n   unless explicitly configured.\n3. **Shutdown** — `Shutdown()` in `pkg/metricstore/metricstore.go:310-315`.\n\nThe **shutdown path is broken**. It writes a final snapshot but never rotates the\nWAL:\n\n```go\nif Keys.Checkpoints.FileFormat == \"wal\" {\n    // WAL files are deleted per-host inside ToCheckpointWAL workers.   <-- FALSE\n    files, _, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n}\n```\n\n- The comment is incorrect: `ToCheckpointWAL` / `toCheckpointBinary`\n  (`walCheckpoint.go:667`, `:768`) only write `.bin` snapshots; they do **not**\n  touch `current.wal`.\n- The second return value (`successDirs` — hosts that got a fresh snapshot) is\n  discarded with `_`.\n- The purpose-built helper `RotateWALFilesAfterShutdown(hostDirs)`\n  (`walCheckpoint.go:406`), which directly `os.Remove`s `current.wal` files after\n  the staging goroutines have exited, is **defined but never called** (verified by\n  grep across `cmd/`, `internal/`, `pkg/`).\n\nConsequence: after each clean shutdown the `current.wal` files remain on disk. On\nthe next startup they are replayed (redundantly, since the `.bin` already has that\ndata) and then **appended to again** (the staging goroutine opens the existing\nfile with `O_APPEND`). Across restarts the WAL grows monotonically and is only\never reset if a 12h periodic checkpoint happens to run. This is the reported\n\"not reset / continuously grows after a start\" behavior.\n\nNote on ordering: in `Shutdown()` the WAL staging goroutines are already stopped\n(channels closed + `WaitForWALStagingDrain()`) *before* the final\n`ToCheckpointWAL`. So the channel-based `RotateWALFiles` is unsafe here — that is\nexactly why the direct-removal `RotateWALFilesAfterShutdown` variant exists.\n\n## Fix\n\nIn `pkg/metricstore/metricstore.go`, `Shutdown()` (the `FileFormat == \"wal\"`\nbranch, ~line 310): capture the `successDirs` return from `ToCheckpointWAL` and\nrotate those WAL files after the snapshot is durably written.\n\n```go\nif Keys.Checkpoints.FileFormat == \"wal\" {\n    var successDirs []string\n    files, successDirs, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n    // Staging goroutines have already exited, so remove the now-redundant\n    // current.wal files directly (channel-based RotateWALFiles is unsafe here).\n    RotateWALFilesAfterShutdown(successDirs)\n} else {\n    files, err = ms.ToCheckpoint(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n}\n```\n\nRotate **only `successDirs`** (hosts that received a fresh snapshot), mirroring the\nperiodic path. A host that produced no snapshot (`ErrNoNewArchiveData`) had no new\nunarchived data for the window, so its WAL is left untouched to avoid dropping any\nrecord not yet captured by a snapshot. Remove/replace the misleading comment.\n\n### Files\n- `pkg/metricstore/metricstore.go` — `Shutdown()` WAL branch (only change needed).\n\n### Reused existing code\n- `RotateWALFilesAfterShutdown([]string)` — `pkg/metricstore/walCheckpoint.go:406`\n  (already implemented; just needs to be wired in).\n- `successDirs` return of `ToCheckpointWAL` — `walCheckpoint.go:667`.\n\n## Verification\n\n1. Build: `go build ./...`\n2. Targeted unit test (add to `pkg/metricstore`): write a few metrics so a host\n   WAL exists, run a checkpoint + `Shutdown()` equivalent, then assert\n   `current.wal` no longer exists (or is recreated empty) for hosts that were\n   snapshotted. Run `go test ./pkg/metricstore/...`.\n3. Manual end-to-end:\n   - Configure `checkpoints.file-format: \"wal\"` (default) with a short\n     `checkpoint-interval` is *not* required for this test.\n   - Start `cc-backend`, ingest some metrics, confirm\n     `var/checkpoints/<cluster>/<host>/current.wal` grows.\n   - Stop the server (graceful shutdown) and confirm a new `<ts>.bin` appears and\n     `current.wal` is gone for active hosts.\n   - Restart, ingest more, stop again — confirm the WAL does not accumulate the\n     previous run's bytes (size resets each clean shutdown rather than growing\n     monotonically).\n\n## Out of scope / follow-ups (mention only)\n- The 12h default `checkpoint-interval` still bounds in-run WAL growth; operators\n  who want tighter bounds can lower it or set `checkpoints.max-wal-size`. No code\n  change proposed here unless requested.\n","isAgent":false,"filePath":"/Users/jan/.claude/plans/this-application-uses-a-shiny-flame.md"},"sourceToolAssistantUUID":"9643ca2e-b89a-4220-a42a-fac51f89f8c4","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"708b268f-f868-4386-a4de-dcc0c312e76f","isSidechain":false,"attachment":{"type":"plan_mode_exit","planFilePath":"/Users/jan/.claude/plans/this-application-uses-a-shiny-flame.md","planExists":true},"type":"attachment","uuid":"e91135d1-d94a-4a66-a716-ff7530226610","timestamp":"2026-06-05T06:37:24.100Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"e91135d1-d94a-4a66-a716-ff7530226610","isSidechain":false,"type":"system","subtype":"informational","content":"Auto mode lets Claude handle permission prompts automatically — Claude checks each tool call for risky actions and prompt injection before executing. Actions Claude identifies as safe are executed, while actions Claude identifies as risky are blocked and Claude may try a different approach. Ideal for long-running tasks. Sessions are slightly more expensive. Claude can make mistakes that allow harmful commands to run, it's recommended to only use in isolated environments. Shift+Tab to change mode.","isMeta":false,"timestamp":"2026-06-05T06:37:24.900Z","uuid":"ca385019-3a84-47d5-b38f-f664144d3ebc","level":"notice","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"type":"ai-title","aiTitle":"fix-wal-reset-on-shutdown","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63"}
+{"type":"agent-name","agentName":"fix-wal-reset-on-shutdown","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63"}
+{"parentUuid":"ca385019-3a84-47d5-b38f-f664144d3ebc","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_01GPtCTPzdJGT4q3jaB6KvoD","type":"message","role":"assistant","content":[{"type":"text","text":"Let me read the exact lines in `Shutdown()` and apply the fix."}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":86,"cache_creation_input_tokens":3151,"cache_read_input_tokens":90932,"output_tokens":157,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":3151,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":86,"output_tokens":157,"cache_read_input_tokens":90932,"cache_creation_input_tokens":3151,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":3151},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011CbjejjnMxXBD52TYMHgYq","type":"assistant","uuid":"2104af48-e579-48fd-90a8-8c8972b523c7","timestamp":"2026-06-05T06:37:26.100Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"6e751d4c-3e5c-4323-a267-2c982a529745","isSidechain":false,"promptId":"bf1a2a8c-5f1a-4688-91c9-f9d2413ee03d","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01V1bMszopZkaZCKyEkQYNWH","type":"tool_result","content":"299\t\tcclog.Infof(\"[METRICSTORE]> Writing checkpoint to '%s'...\", Keys.Checkpoints.RootDir)\n300\t\tcheckpointStart := time.Now()\n301\t\tvar files int\n302\t\tvar err error\n303\t\n304\t\tms := GetMemoryStore()\n305\t\n306\t\tlastCheckpointMu.Lock()\n307\t\tfrom := lastCheckpoint\n308\t\tlastCheckpointMu.Unlock()\n309\t\n310\t\tif Keys.Checkpoints.FileFormat == \"wal\" {\n311\t\t\t// WAL files are deleted per-host inside ToCheckpointWAL workers.\n312\t\t\tfiles, _, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n313\t\t} else {\n314\t\t\tfiles, err = ms.ToCheckpoint(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n315\t\t}\n316\t\n317\t\tif err != nil {\n318\t\t\tcclog.Errorf(\"[METRICSTORE]> Writing checkpoint failed: %s\", err.Error())\n319\t\t}\n320\t\tcclog.Infof(\"[METRICSTORE]> Done! (%d files written in %v, total shutdown: %v)\", files, time.Since(checkpointStart), time.Since(totalStart))"}]},"uuid":"2f329443-cb0f-4463-9395-eb67dbbece6d","timestamp":"2026-06-05T06:37:27.498Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go","content":"\tcclog.Infof(\"[METRICSTORE]> Writing checkpoint to '%s'...\", Keys.Checkpoints.RootDir)\n\tcheckpointStart := time.Now()\n\tvar files int\n\tvar err error\n\n\tms := GetMemoryStore()\n\n\tlastCheckpointMu.Lock()\n\tfrom := lastCheckpoint\n\tlastCheckpointMu.Unlock()\n\n\tif Keys.Checkpoints.FileFormat == \"wal\" {\n\t\t// WAL files are deleted per-host inside ToCheckpointWAL workers.\n\t\tfiles, _, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n\t} else {\n\t\tfiles, err = ms.ToCheckpoint(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n\t}\n\n\tif err != nil {\n\t\tcclog.Errorf(\"[METRICSTORE]> Writing checkpoint failed: %s\", err.Error())\n\t}\n\tcclog.Infof(\"[METRICSTORE]> Done! (%d files written in %v, total shutdown: %v)\", files, time.Since(checkpointStart), time.Since(totalStart))","numLines":22,"startLine":299,"totalLines":815}},"sourceToolAssistantUUID":"6e751d4c-3e5c-4323-a267-2c982a529745","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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+{"parentUuid":"193e82b9-9784-4dca-b629-31f337d22fe3","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_01QA4TqzmNRV4w1ZtxQvZR5F","type":"message","role":"assistant","content":[{"type":"text","text":"Build passes. (The `walCheckpoint.go:659` lint warning is pre-existing in `joinSelector`, unrelated to this change.)\n\n## Done\n\nThe fix is in `pkg/metricstore/metricstore.go`, `Shutdown()`:\n\n```go\nif Keys.Checkpoints.FileFormat == \"wal\" {\n    var successDirs []string\n    files, successDirs, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n    // ... remove now-redundant current.wal files directly ...\n    RotateWALFilesAfterShutdown(successDirs)\n} else {\n    ...\n}\n```\n\n**What was wrong:** On graceful shutdown the final `.bin` snapshot was written, but the `successDirs` return was discarded (`_`) and the WAL was never rotated. The old comment claimed `ToCheckpointWAL` deletes WAL files — it doesn't. The purpose-built `RotateWALFilesAfterShutdown` helper existed but was never called. So `current.wal` survived every clean shutdown, got replayed *and re-appended to* on the next start, and only ever reset at the 12h periodic checkpoint — hence unbounded growth across restarts.\n\n**The change:** capture `successDirs` and rotate exactly those hosts' WAL files (mirroring the periodic-checkpoint path; staging goroutines are already stopped, so the direct-removal variant is correct here). Hosts with no fresh snapshot are deliberately left untouched so no uncaptured records are dropped.\n\nYou can verify end-to-end per the plan: start → ingest → stop (confirm `<ts>.bin` appears and `current.wal` is gone for active hosts) → restart/ingest/stop again → confirm WAL size resets each clean shutdown instead of accumulating."}],"stop_reason":"end_turn","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":87,"cache_creation_input_tokens":235,"cache_read_input_tokens":95351,"output_tokens":729,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":235,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":87,"output_tokens":729,"cache_read_input_tokens":95351,"cache_creation_input_tokens":235,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":235},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011CbjekmP8vePhRg5w7wUbU","type":"assistant","uuid":"0a44dca6-8571-4ec6-9244-475cee817e6a","timestamp":"2026-06-05T06:37:47.574Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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Depending on your database size (more then 40GB) the\n13\t`VACUUM` may take up to 2h. You can also run the `ANALYZE` command manually.\n14\tWhile we are confident that the memory issue with the metricstore cleanup move\n15\tpolicy is fixed, it is still recommended to use delete policy for cleanup.\n16\tThis is also the default.\n17\t\n18\t## Changes in 1.5.4\n19\t\n20\t### Security fixes\n21\t\n22\t- **JWT HMAC empty-key bypass (critical)**: `jwtSession.go` now refuses to\n23\t  register when `CROSS_LOGIN_JWT_HS512_KEY` is unset. Previously, an empty HMAC\n24\t  key allowed unauthenticated admin token forgery because `golang-jwt` verifies\n25\t  any HS256/HS512 signature against an empty key.\n26\t- **SQL injection via metric names (critical)**: Metric names supplied through\n27\t  GraphQL (`[String!]`) were interpolated raw into `json_extract` SQL expressions.\n28\t  Names are now validated against `^[a-zA-Z0-9_]+$` in\n29\t  `jobsMetricStatisticsHistogram` and `buildFloatJSONCondition`.\n30\t- **Path traversal via line-protocol tags (critical)**: `cluster` and `host`\n31\t  tags from the metric line protocol flowed unvalidated into `path.Join` for\n32\t  checkpoint/WAL file paths, enabling arbitrary file writes outside the\n33\t  checkpoint root via NATS (unauthenticated) or `POST /api/write`. Path-traversal\n34\t  sequences are now rejected in `DecodeLine` before the tags become path\n35\t  components.\n36\t- **CORS `AllowCredentials` disabled**: CORS middleware no longer sets\n37\t  `AllowCredentials: true`, which was incompatible with `AllowedOrigins: [\"*\"]`\n38\t  and could enable cross-origin credential theft.\n39\t- **HSTS header added**: `Strict-Transport-Security` is now set for all\n40\t  HTTPS connections.\n41\t- **Security response headers**: Added `X-Content-Type-Options: nosniff`,\n42\t  `X-Frame-Options: DENY`, `Referrer-Policy: same-origin`, and a conservative\n43\t  `Content-Security-Policy` (blocks `frame-ancestors`, `object-src`, `base-uri`)\n44\t  to harden against clickjacking and base-tag injection.\n45\t- **Stored XSS in job message**: `job.metaData.message` is now rendered as\n46\t  escaped text (CSS `white-space: pre-wrap`) instead of raw `{@html ...}` in\n47\t  `Job.root` and `JobFootprint`.\n48\t- **SQL injection in tag queries**: The tag-scope `IN` list and manager project\n49\t  subquery in `CountTags` are now parameterized instead of interpolating\n50\t  `user.Username` / `user.Projects` values sourced from OIDC/LDAP.\n51\t- **GraphQL DoS hardening**: Query cost is bounded with `FixedComplexityLimit`\n52\t  (5000). Non-positive `items-per-page` and `page` values are rejected with HTTP\n53\t  400 to prevent integer underflow into unbounded `LIMIT`/`OFFSET` queries.\n54\t- **CSRF defense-in-depth**: State-changing requests with a cross-site\n55\t  `Sec-Fetch-Site` header are now rejected (fails open for non-browser clients),\n56\t  complementing the existing `SameSite=Lax` session cookie.\n57\t- **NATS API security warning**: A startup warning is now logged when NATS\n58\t  subscriptions are enabled, reminding operators that the NATS API has no\n59\t  application-layer authentication and that publish ACLs must be restricted at\n60\t  the broker."}]},"uuid":"895dc912-d284-4a9a-bd30-8e3e019fc322","timestamp":"2026-06-05T06:57:02.471Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/ReleaseNotes.md","content":"# `cc-backend` version 1.5.4\n\nSupports job archive version 3 and database version 11.\n\nThis is a security and bugfix release of `cc-backend`, the API backend and\nfrontend implementation of ClusterCockpit.\nFor release specific notes visit the [ClusterCockpit Documentation](https://clusterockpit.org/docs/release/).\nIf you are upgrading from v1.5.1 no database migration is required.\nIf you are upgrading from v1.5.0 you need to do another DB migration. This\nshould not take long. For optimal database performance after the migration it is\nrecommended to apply the new `optimize-db` flag, which runs the sqlite `ANALYZE`\nand `VACUUM` commands. Depending on your database size (more then 40GB) the\n`VACUUM` may take up to 2h. You can also run the `ANALYZE` command manually.\nWhile we are confident that the memory issue with the metricstore cleanup move\npolicy is fixed, it is still recommended to use delete policy for cleanup.\nThis is also the default.\n\n## Changes in 1.5.4\n\n### Security fixes\n\n- **JWT HMAC empty-key bypass (critical)**: `jwtSession.go` now refuses to\n  register when `CROSS_LOGIN_JWT_HS512_KEY` is unset. Previously, an empty HMAC\n  key allowed unauthenticated admin token forgery because `golang-jwt` verifies\n  any HS256/HS512 signature against an empty key.\n- **SQL injection via metric names (critical)**: Metric names supplied through\n  GraphQL (`[String!]`) were interpolated raw into `json_extract` SQL expressions.\n  Names are now validated against `^[a-zA-Z0-9_]+$` in\n  `jobsMetricStatisticsHistogram` and `buildFloatJSONCondition`.\n- **Path traversal via line-protocol tags (critical)**: `cluster` and `host`\n  tags from the metric line protocol flowed unvalidated into `path.Join` for\n  checkpoint/WAL file paths, enabling arbitrary file writes outside the\n  checkpoint root via NATS (unauthenticated) or `POST /api/write`. Path-traversal\n  sequences are now rejected in `DecodeLine` before the tags become path\n  components.\n- **CORS `AllowCredentials` disabled**: CORS middleware no longer sets\n  `AllowCredentials: true`, which was incompatible with `AllowedOrigins: [\"*\"]`\n  and could enable cross-origin credential theft.\n- **HSTS header added**: `Strict-Transport-Security` is now set for all\n  HTTPS connections.\n- **Security response headers**: Added `X-Content-Type-Options: nosniff`,\n  `X-Frame-Options: DENY`, `Referrer-Policy: same-origin`, and a conservative\n  `Content-Security-Policy` (blocks `frame-ancestors`, `object-src`, `base-uri`)\n  to harden against clickjacking and base-tag injection.\n- **Stored XSS in job message**: `job.metaData.message` is now rendered as\n  escaped text (CSS `white-space: pre-wrap`) instead of raw `{@html ...}` in\n  `Job.root` and `JobFootprint`.\n- **SQL injection in tag queries**: The tag-scope `IN` list and manager project\n  subquery in `CountTags` are now parameterized instead of interpolating\n  `user.Username` / `user.Projects` values sourced from OIDC/LDAP.\n- **GraphQL DoS hardening**: Query cost is bounded with `FixedComplexityLimit`\n  (5000). Non-positive `items-per-page` and `page` values are rejected with HTTP\n  400 to prevent integer underflow into unbounded `LIMIT`/`OFFSET` queries.\n- **CSRF defense-in-depth**: State-changing requests with a cross-site\n  `Sec-Fetch-Site` header are now rejected (fails open for non-browser clients),\n  complementing the existing `SameSite=Lax` session cookie.\n- **NATS API security warning**: A startup warning is now logged when NATS\n  subscriptions are enabled, reminding operators that the NATS API has no\n  application-layer authentication and that publish ACLs must be restricted at\n  the broker.","numLines":60,"startLine":1,"totalLines":561}},"sourceToolAssistantUUID":"3e2b1e05-7ffe-4d7b-b855-538b850e2588","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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Roles are now always\n86\t  requested from the token regardless of other configuration.\n87\t- **OIDC user sync role changes**: `SyncUser` and `UpdateUser` callbacks now\n88\t  allow all role changes, removing a restriction that prevented role updates\n89\t  during OIDC-driven user synchronization.\n90\t- **OIDC projects array**: Projects array from the OIDC token is now submitted\n91\t  and applied when syncing user attributes.\n92\t- **WAL message drops during checkpoint**: WAL writes are now paused during\n93\t  binary checkpoint creation. Previously, disk I/O contention between\n94\t  checkpoint writes and WAL staging caused over 1.4 million dropped messages\n95\t  per checkpoint cycle.\n96\t- **WAL rotation skipped for all nodes**: `RotateWALFiles` used a non-blocking\n97\t  send on a small channel. With thousands of nodes, the channel filled instantly\n98\t  and nearly all hosts were skipped, leaving WAL files unrotated. Replaced with\n99\t  a blocking send using a shared 2-minute deadline.\n100\t- **Log viewer auto-refresh**: Fixed the log viewer component not auto-refreshing\n101\t  correctly.\n102\t- **SameSite cookie setting**: Relaxed the SameSite cookie attribute to improve\n103\t  compatibility with OIDC redirect flows.\n104\t- **WAL not rotated on partial checkpoint failure**: When binary checkpointing\n105\t  failed for some hosts, WAL files for successfully checkpointed hosts were not\n106\t  rotated and the checkpoint timestamp was not advanced. Partial successes now\n107\t  correctly advance the checkpoint and rotate WAL files for completed hosts.\n108\t- **Unbounded WAL file growth**: If binary checkpointing consistently failed for\n109\t  a host, its `current.wal` file grew without limit until disk exhaustion. A new\n110\t  `max-wal-size` configuration option (in the `checkpoints` block) allows setting\n111\t  a per-host WAL size cap in bytes. 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Improved validation and UI text for \"more than equal\" and\n116\t  \"less than equal\" range selections.\n117\t- **Lineprotocol body parsing interrupted**: Switched from `ReadTimeout` to\n118\t  `ReadHeaderTimeout` so that long-running metric submissions are no longer\n119\t  cut off mid-stream."}]},"uuid":"9e0885ae-34d6-40b1-b456-85641a4fe797","timestamp":"2026-06-05T06:57:05.598Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/ReleaseNotes.md","content":"  the broker.\n\n### Bug fixes\n\n- **Roofline legend placement**: Roofline plot legends now use fixed\n  coordinates instead of dynamic placement, preventing the legend from\n  overlapping data points or being rendered off-canvas (#546).\n- **Subcluster usage tab labels**: Subcluster names in the status dashboard\n  usage tabs are no longer force-capitalized; the original cluster-defined\n  casing is preserved.\n- **NodeListRow host filter**: The running-jobs query in the node list row now\n  filters by exact node hostname (`eq`) instead of substring match\n  (`contains`), avoiding incorrect matches when one hostname is a prefix of\n  another.\n\n### Dependencies\n\n- **Go module upgrades**: Refreshed Go module dependencies to their latest\n  compatible versions.\n\n## Changes in 1.5.3\n\n### Bug fixes\n\n- **OIDC role extraction**: Fixed role extraction from OIDC tokens where roles\n  were not correctly parsed from the token claims. 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+{"parentUuid":"249c1064-7c4b-4a72-9b71-2f843e25bac5","isSidechain":false,"promptId":"e03eec5c-111d-4cd6-a2ad-e4499d1dc6b1","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_019ToJUt5XYAxJHBejdEjMmG","type":"tool_result","content":"1\t// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n2\t// All rights reserved. This file is part of cc-backend.\n3\t// Use of this source code is governed by a MIT-style\n4\t// license that can be found in the LICENSE file.\n5\t\n6\t// Package main provides the entry point for the ClusterCockpit backend server.\n7\t// It orchestrates initialization of all subsystems including configuration,\n8\t// database, authentication, and the HTTP server.\n9\tpackage main\n10\t\n11\timport (\n12\t\t\"context\"\n13\t\t\"encoding/json\"\n14\t\t\"fmt\"\n15\t\t\"os\"\n16\t\t\"os/signal\"\n17\t\tgoruntime \"runtime\"\n18\t\t\"runtime/debug\"\n19\t\t\"strings\"\n20\t\t\"sync\"\n21\t\t\"syscall\"\n22\t\t\"time\"\n23\t\n24\t\t\"github.com/ClusterCockpit/cc-backend/internal/archiver\"\n25\t\t\"github.com/ClusterCockpit/cc-backend/internal/auth\"\n26\t\t\"github.com/ClusterCockpit/cc-backend/internal/config\"\n27\t\t\"github.com/ClusterCockpit/cc-backend/internal/importer\"\n28\t\t\"github.com/ClusterCockpit/cc-backend/internal/metricdispatch\"\n29\t\t\"github.com/ClusterCockpit/cc-backend/internal/repository\"\n30\t\t\"github.com/ClusterCockpit/cc-backend/internal/tagger\"\n31\t\t\"github.com/ClusterCockpit/cc-backend/internal/taskmanager\"\n32\t\t\"github.com/ClusterCockpit/cc-backend/pkg/archive\"\n33\t\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n34\t\t\"github.com/ClusterCockpit/cc-backend/web\"\n35\t\tccconf \"github.com/ClusterCockpit/cc-lib/v2/ccConfig\"\n36\t\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n37\t\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n38\t\t\"github.com/ClusterCockpit/cc-lib/v2/runtime\"\n39\t\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n40\t\t\"github.com/ClusterCockpit/cc-lib/v2/util\"\n41\t\t\"github.com/google/gops/agent\"\n42\t\t\"github.com/joho/godotenv\"\n43\t\n44\t\t_ \"github.com/mattn/go-sqlite3\"\n45\t)\n46\t\n47\tconst logoString = `\n48\t _____ _           _             ____           _          _ _\n49\t/  ___| |_   _ ___| |_ ___ _ __ / ___|___   ___| | ___ __ (_) |_\n50\t| |   | | | | / __| __/ _ \\ '__| |   / _ \\ / __| |/ / '_ \\| | __|\n51\t| |___| | |_| \\__ \\ ||  __/ |  | |__| (_) | (__|   <| |_) | | |_\n52\t\\_____|_|\\__,_|___/\\__\\___|_|   \\____\\___/ \\___|_|\\_\\ .__/|_|\\__|\n53\t                                                    |_|\n54\t`\n55\t\n56\t// Environment variable names\n57\tconst (\n58\t\tenvGOGC = \"GOGC\"\n59\t)\n60\t\n61\t// Default configurations\n62\tconst (\n63\t\tdefaultArchiveConfig = `{\"kind\":\"file\",\"path\":\"./var/job-archive\"}`\n64\t)\n65\t\n66\tvar (\n67\t\tdate    string\n68\t\tcommit  string\n69\t\tversion string\n70\t)\n71\t\n72\tfunc printVersion() {\n73\t\tfmt.Print(logoString)\n74\t\tfmt.Printf(\"Version:\\t%s\\n\", version)\n75\t\tfmt.Printf(\"Git hash:\\t%s\\n\", commit)\n76\t\tfmt.Printf(\"Build time:\\t%s\\n\", date)\n77\t\tfmt.Printf(\"SQL db version:\\t%d\\n\", repository.Version)\n78\t\tfmt.Printf(\"Job archive version:\\t%d\\n\", archive.Version)\n79\t}\n80\t\n81\tfunc initGops() error {\n82\t\tif !flagGops {\n83\t\t\treturn nil\n84\t\t}\n85\t\n86\t\tif err := agent.Listen(agent.Options{}); err != nil {\n87\t\t\treturn fmt.Errorf(\"starting gops agent: %w\", err)\n88\t\t}\n89\t\treturn nil\n90\t}\n91\t\n92\tfunc loadEnvironment() error {\n93\t\tif err := godotenv.Load(); err != nil {\n94\t\t\treturn fmt.Errorf(\"loading .env file: %w\", err)\n95\t\t}\n96\t\treturn nil\n97\t}\n98\t\n99\tfunc initConfiguration() error {\n100\t\tccconf.Init(flagConfigFile)\n101\t\n102\t\tcfg := ccconf.GetPackageConfig(\"main\")\n103\t\tif cfg == nil {\n104\t\t\treturn fmt.Errorf(\"main configuration must be present\")\n105\t\t}\n106\t\n107\t\tconfig.Init(cfg)\n108\t\treturn nil\n109\t}\n110\t\n111\tfunc initDatabase() error {\n112\t\tif config.Keys.DbConfig != nil {\n113\t\t\tcfg := repository.DefaultConfig()\n114\t\t\tdc := config.Keys.DbConfig\n115\t\t\tif dc.CacheSizeMB > 0 {\n116\t\t\t\tcfg.DbCacheSizeMB = dc.CacheSizeMB\n117\t\t\t}\n118\t\t\tif dc.SoftHeapLimitMB > 0 {\n119\t\t\t\tcfg.DbSoftHeapLimitMB = dc.SoftHeapLimitMB\n120\t\t\t}\n121\t\t\tif dc.MaxOpenConnections > 0 {\n122\t\t\t\tcfg.MaxOpenConnections = dc.MaxOpenConnections\n123\t\t\t}\n124\t\t\tif dc.MaxIdleConnections > 0 {\n125\t\t\t\tcfg.MaxIdleConnections = dc.MaxIdleConnections\n126\t\t\t}\n127\t\t\tif dc.ConnectionMaxIdleTimeMins > 0 {\n128\t\t\t\tcfg.ConnectionMaxIdleTime = time.Duration(dc.ConnectionMaxIdleTimeMins) * time.Minute\n129\t\t\t}\n130\t\t\tif dc.BusyTimeoutMs > 0 {\n131\t\t\t\tcfg.BusyTimeoutMs = dc.BusyTimeoutMs\n132\t\t\t}\n133\t\t\trepository.SetConfig(cfg)\n134\t\t}\n135\t\trepository.Connect(config.Keys.DB)\n136\t\treturn nil\n137\t}\n138\t\n139\tfunc handleDatabaseCommands() error {\n140\t\tif flagMigrateDB {\n141\t\t\terr := repository.MigrateDB(config.Keys.DB)\n142\t\t\tif err != nil {\n143\t\t\t\treturn fmt.Errorf(\"migrating database to version %d: %w\", repository.Version, err)\n144\t\t\t}\n145\t\t\tcclog.Exitf(\"MigrateDB Success: Migrated SQLite database at '%s' to version %d.\\n\",\n146\t\t\t\tconfig.Keys.DB, repository.Version)\n147\t\t}\n148\t\n149\t\tif flagRevertDB {\n150\t\t\terr := repository.RevertDB(config.Keys.DB)\n151\t\t\tif err != nil {\n152\t\t\t\treturn fmt.Errorf(\"reverting database to version %d: %w\", repository.Version-1, err)\n153\t\t\t}\n154\t\t\tcclog.Exitf(\"RevertDB Success: Reverted SQLite database at '%s' to version %d.\\n\",\n155\t\t\t\tconfig.Keys.DB, repository.Version-1)\n156\t\t}\n157\t\n158\t\tif flagForceDB {\n159\t\t\terr := repository.ForceDB(config.Keys.DB)\n160\t\t\tif err != nil {\n161\t\t\t\treturn fmt.Errorf(\"forcing database to version %d: %w\", repository.Version, err)\n162\t\t\t}\n163\t\t\tcclog.Exitf(\"ForceDB Success: Forced SQLite database at '%s' to version %d.\\n\",\n164\t\t\t\tconfig.Keys.DB, repository.Version)\n165\t\t}\n166\t\n167\t\treturn nil\n168\t}\n169\t\n170\tfunc handleUserCommands() error {\n171\t\tif config.Keys.DisableAuthentication && (flagNewUser != \"\" || flagDelUser != \"\") {\n172\t\t\treturn fmt.Errorf(\"--add-user and --del-user can only be used if authentication is enabled\")\n173\t\t}\n174\t\n175\t\tif !config.Keys.DisableAuthentication {\n176\t\t\tif cfg := ccconf.GetPackageConfig(\"auth\"); cfg != nil {\n177\t\t\t\tauth.Init(&cfg)\n178\t\t\t} else {\n179\t\t\t\tcclog.Warn(\"Authentication disabled due to missing configuration\")\n180\t\t\t\tauth.Init(nil)\n181\t\t\t}\n182\t\n183\t\t\t// Check for default security keys\n184\t\t\tcheckDefaultSecurityKeys()\n185\t\n186\t\t\tif flagNewUser != \"\" {\n187\t\t\t\tif err := addUser(flagNewUser); err != nil {\n188\t\t\t\t\treturn err\n189\t\t\t\t}\n190\t\t\t}\n191\t\n192\t\t\tif flagDelUser != \"\" {\n193\t\t\t\tif err := delUser(flagDelUser); err != nil {\n194\t\t\t\t\treturn err\n195\t\t\t\t}\n196\t\t\t}\n197\t\n198\t\t\tauthHandle := auth.GetAuthInstance()\n199\t\n200\t\t\tif flagSyncLDAP {\n201\t\t\t\tif err := syncLDAP(authHandle); err != nil {\n202\t\t\t\t\treturn err\n203\t\t\t\t}\n204\t\t\t}\n205\t\n206\t\t\tif flagGenJWT != \"\" {\n207\t\t\t\tif err := generateJWT(authHandle, flagGenJWT); err != nil {\n208\t\t\t\t\treturn err\n209\t\t\t\t}\n210\t\t\t}\n211\t\t}\n212\t\n213\t\treturn nil\n214\t}\n215\t\n216\t// checkDefaultSecurityKeys warns if default JWT keys are detected\n217\tfunc checkDefaultSecurityKeys() {\n218\t\t// Default JWT public key from init.go\n219\t\tdefaultJWTPublic := \"REDACTED\"\n220\t\n221\t\tif os.Getenv(\"JWT_PUBLIC_KEY\") == defaultJWTPublic {\n222\t\t\tcclog.Warn(\"Using default JWT keys - not recommended for production environments\")\n223\t\t}\n224\t}\n225\t\n226\tfunc addUser(userSpec string) error {\n227\t\tparts := strings.SplitN(userSpec, \":\", 3)\n228\t\tif len(parts) != 3 || len(parts[0]) == 0 {\n229\t\t\treturn fmt.Errorf(\"invalid user format, want: <username>:[admin,support,manager,api,user]:<password>, have: %s\", userSpec)\n230\t\t}\n231\t\n232\t\tur := repository.GetUserRepository()\n233\t\tif err := ur.AddUser(&schema.User{\n234\t\t\tUsername: parts[0],\n235\t\t\tProjects: make([]string, 0),\n236\t\t\tPassword: parts[2],\n237\t\t\tRoles:    strings.Split(parts[1], \",\"),\n238\t\t}); err != nil {\n239\t\t\treturn fmt.Errorf(\"adding user '%s' with roles '%s': %w\", parts[0], parts[1], err)\n240\t\t}\n241\t\n242\t\tcclog.Infof(\"Add User: Added new user '%s' with roles '%s'\", parts[0], parts[1])\n243\t\treturn nil\n244\t}\n245\t\n246\tfunc delUser(username string) error {\n247\t\tur := repository.GetUserRepository()\n248\t\tif err := ur.DelUser(username); err != nil {\n249\t\t\treturn fmt.Errorf(\"deleting user '%s': %w\", username, err)\n250\t\t}\n251\t\tcclog.Infof(\"Delete User: Deleted user '%s' from DB\", username)\n252\t\treturn nil\n253\t}\n254\t\n255\tfunc syncLDAP(authHandle *auth.Authentication) error {\n256\t\tif authHandle.LdapAuth == nil {\n257\t\t\treturn fmt.Errorf(\"LDAP authentication is not configured\")\n258\t\t}\n259\t\n260\t\tif err := authHandle.LdapAuth.Sync(); err != nil {\n261\t\t\treturn fmt.Errorf(\"synchronizing LDAP: %w\", err)\n262\t\t}\n263\t\n264\t\tcclog.Print(\"Sync LDAP: LDAP synchronization successfull.\")\n265\t\treturn nil\n266\t}\n267\t\n268\tfunc generateJWT(authHandle *auth.Authentication, username string) error {\n269\t\tur := repository.GetUserRepository()\n270\t\tuser, err := ur.GetUser(username)\n271\t\tif err != nil {\n272\t\t\treturn fmt.Errorf(\"getting user '%s': %w\", username, err)\n273\t\t}\n274\t\n275\t\tif !user.HasRole(schema.RoleAPI) {\n276\t\t\tcclog.Warnf(\"JWT: User '%s' does not have the role 'api'. REST API endpoints will return error!\\n\", user.Username)\n277\t\t}\n278\t\n279\t\tjwt, err := authHandle.JwtAuth.ProvideJWT(user)\n280\t\tif err != nil {\n281\t\t\treturn fmt.Errorf(\"generating JWT for user '%s': %w\", user.Username, err)\n282\t\t}\n283\t\n284\t\tcclog.Printf(\"JWT: Successfully generated JWT for user '%s': %s\\n\", user.Username, jwt)\n285\t\treturn nil\n286\t}\n287\t\n288\tfunc initSubsystems() error {\n289\t\t// Initialize nats client\n290\t\tnatsConfig := ccconf.GetPackageConfig(\"nats\")\n291\t\tif err := nats.Init(natsConfig); err != nil {\n292\t\t\tcclog.Warnf(\"initializing (optional) nats client: %s\", err.Error())\n293\t\t}\n294\t\tnats.Connect()\n295\t\n296\t\t// Initialize job archive\n297\t\tarchiveCfg := ccconf.GetPackageConfig(\"archive\")\n298\t\tif archiveCfg == nil {\n299\t\t\tcclog.Debug(\"Archive configuration not found, using default archive configuration\")\n300\t\t\tarchiveCfg = json.RawMessage(defaultArchiveConfig)\n301\t\t}\n302\t\tif err := archive.Init(archiveCfg); err != nil {\n303\t\t\treturn fmt.Errorf(\"initializing archive: %w\", err)\n304\t\t}\n305\t\n306\t\t// Handle database re-initialization\n307\t\tif flagReinitDB {\n308\t\t\tif err := importer.InitDB(); err != nil {\n309\t\t\t\treturn fmt.Errorf(\"re-initializing repository DB: %w\", err)\n310\t\t\t}\n311\t\t\tcclog.Print(\"Init DB: Successfully re-initialized repository DB.\")\n312\t\t}\n313\t\n314\t\t// Handle job import\n315\t\tif flagImportJob != \"\" {\n316\t\t\tif err := importer.HandleImportFlag(flagImportJob); err != nil {\n317\t\t\t\treturn fmt.Errorf(\"importing job: %w\", err)\n318\t\t\t}\n319\t\t\tcclog.Infof(\"Import Job: Imported Job '%s' into DB\", flagImportJob)\n320\t\t}\n321\t\n322\t\t// Initialize taggers\n323\t\tif config.Keys.EnableJobTaggers {\n324\t\t\ttagger.Init()\n325\t\t}\n326\t\n327\t\t// Apply tags if requested\n328\t\tif flagApplyTags {\n329\t\t\ttagger.Init()\n330\t\n331\t\t\tif err := tagger.RunTaggers(); err != nil {\n332\t\t\t\treturn fmt.Errorf(\"running job taggers: %w\", err)\n333\t\t\t}\n334\t\t}\n335\t\n336\t\treturn nil\n337\t}\n338\t\n339\tfunc runServer(ctx context.Context) error {\n340\t\tvar wg sync.WaitGroup\n341\t\n342\t\t// Initialize metric store if configuration is provided\n343\t\thaveMetricstore := false\n344\t\tmscfg := ccconf.GetPackageConfig(\"metric-store\")\n345\t\tif mscfg != nil {\n346\t\t\tmetrics := metricstore.BuildMetricList()\n347\t\t\tmetricstore.Init(mscfg, metrics, &wg)\n348\t\n349\t\t\t// Inject repository as NodeProvider to break import cycle\n350\t\t\tms := metricstore.GetMemoryStore()\n351\t\t\tjobRepo := repository.GetJobRepository()\n352\t\t\tms.SetNodeProvider(jobRepo)\n353\t\t\tmetricstore.MetricStoreHandle = &metricstore.InternalMetricStore{}\n354\t\t\thaveMetricstore = true\n355\t\t} else {\n356\t\t\tmetricstore.MetricStoreHandle = nil\n357\t\t\tcclog.Debug(\"missing internal metricstore configuration\")\n358\t\t}\n359\t\n360\t\t// Initialize external metric stores if configuration is provided\n361\t\tmscfg = ccconf.GetPackageConfig(\"metric-store-external\")\n362\t\tif mscfg != nil {\n363\t\t\terr := metricdispatch.Init(mscfg)\n364\t\n365\t\t\tif err != nil {\n366\t\t\t\tcclog.Debugf(\"error while initializing external metricdispatch: %v\", err)\n367\t\t\t} else {\n368\t\t\t\thaveMetricstore = true\n369\t\t\t}\n370\t\t}\n371\t\n372\t\tif !haveMetricstore {\n373\t\t\treturn fmt.Errorf(\"missing metricstore configuration\")\n374\t\t}\n375\t\n376\t\t// Start archiver and task manager\n377\t\tarchiver.Start(repository.GetJobRepository(), ctx)\n378\t\ttaskmanager.Start(ccconf.GetPackageConfig(\"cron\"), ccconf.GetPackageConfig(\"archive\"))\n379\t\n380\t\t// Initialize web UI\n381\t\tcfg := ccconf.GetPackageConfig(\"ui\")\n382\t\tif err := web.Init(cfg); err != nil {\n383\t\t\treturn fmt.Errorf(\"initializing web UI: %w\", err)\n384\t\t}\n385\t\n386\t\t// Initialize HTTP server\n387\t\tsrv, err := NewServer(version, commit, date)\n388\t\tif err != nil {\n389\t\t\treturn fmt.Errorf(\"creating server: %w\", err)\n390\t\t}\n391\t\n392\t\t// Channel to collect errors from server\n393\t\terrChan := make(chan error, 1)\n394\t\n395\t\t// Start HTTP server\n396\t\twg.Go(func() {\n397\t\t\tif err := srv.Start(ctx); err != nil {\n398\t\t\t\terrChan <- err\n399\t\t\t}\n400\t\t})\n401\t\n402\t\t// Handle shutdown signals\n403\t\twg.Add(1)\n404\t\tsigs := make(chan os.Signal, 1)\n405\t\tsignal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)\n406\t\tgo func() {\n407\t\t\tdefer wg.Done()\n408\t\t\tselect {\n409\t\t\tcase <-sigs:\n410\t\t\t\tcclog.Info(\"Shutdown signal received\")\n411\t\t\tcase <-ctx.Done():\n412\t\t\t}\n413\t\n414\t\t\truntime.SystemdNotify(false, \"Shutting down ...\")\n415\t\t\tsrv.Shutdown(ctx)\n416\t\t\tutil.FsWatcherShutdown()\n417\t\t\ttaskmanager.Shutdown()\n418\t\t}()\n419\t\n420\t\t// Set GC percent if not configured\n421\t\tif os.Getenv(envGOGC) == \"\" {\n422\t\t\t// trigger GC when heap grows 15% above the previous live set\n423\t\t\tdebug.SetGCPercent(15)\n424\t\t}\n425\t\truntime.SystemdNotify(true, \"running\")\n426\t\n427\t\twaitDone := make(chan struct{})\n428\t\tgo func() {\n429\t\t\twg.Wait()\n430\t\t\tclose(waitDone)\n431\t\t}()\n432\t\n433\t\tgo func() {\n434\t\t\t<-waitDone\n435\t\t\tclose(errChan)\n436\t\t}()\n437\t\n438\t\t// Wait for either:\n439\t\t// 1. An error from server startup\n440\t\t// 2. Completion of all goroutines (normal shutdown or crash)\n441\t\tselect {\n442\t\tcase err := <-errChan:\n443\t\t\t// errChan will be closed when waitDone is closed, which happens\n444\t\t\t// when all goroutines complete (either from normal shutdown or error)\n445\t\t\tif err != nil {\n446\t\t\t\treturn err\n447\t\t\t}\n448\t\tcase <-time.After(100 * time.Millisecond):\n449\t\t\t// Give the server 100ms to start and report any immediate startup errors\n450\t\t\t// After that, just wait for normal shutdown completion\n451\t\t\tselect {\n452\t\t\tcase err := <-errChan:\n453\t\t\t\tif err != nil {\n454\t\t\t\t\treturn err\n455\t\t\t\t}\n456\t\t\tcase <-waitDone:\n457\t\t\t\t// Normal shutdown completed\n458\t\t\t}\n459\t\t}\n460\t\n461\t\tcclog.Print(\"Graceful shutdown completed!\")\n462\t\treturn nil\n463\t}\n464\t\n465\tfunc run() error {\n466\t\tcliInit()\n467\t\n468\t\tif flagVersion {\n469\t\t\tprintVersion()\n470\t\t\treturn nil\n471\t\t}\n472\t\n473\t\t// Initialize logger\n474\t\tcclog.Init(flagLogLevel, flagLogDateTime)\n475\t\n476\t\t// Handle init flag\n477\t\tif flagInit {\n478\t\t\tinitEnv()\n479\t\t\tcclog.Exit(\"Successfully setup environment!\\n\" +\n480\t\t\t\t\"Please review config.json and .env and adjust it to your needs.\\n\" +\n481\t\t\t\t\"Add your job-archive at ./var/job-archive.\")\n482\t\t}\n483\t\n484\t\t// Initialize gops agent\n485\t\tif err := initGops(); err != nil {\n486\t\t\treturn err\n487\t\t}\n488\t\n489\t\t// Initialize subsystems in dependency order:\n490\t\t// 1. Load environment variables from .env file (contains sensitive configuration)\n491\t\t// 2. Load configuration from config.json (may reference environment variables)\n492\t\t// 3. Handle database migration commands if requested\n493\t\t// 4. Initialize database connection (requires config for connection string)\n494\t\t// 5. Handle user commands if requested (requires database and authentication config)\n495\t\t// 6. Initialize subsystems like archive and metrics (require config and database)\n496\t\n497\t\t// Load environment and configuration\n498\t\tif err := loadEnvironment(); err != nil {\n499\t\t\treturn err\n500\t\t}\n501\t\n502\t\tif err := initConfiguration(); err != nil {\n503\t\t\treturn err\n504\t\t}\n505\t\n506\t\t// Handle database migration (migrate, revert, force)\n507\t\tif err := handleDatabaseCommands(); err != nil {\n508\t\t\treturn err\n509\t\t}\n510\t\n511\t\t// Initialize database\n512\t\tif err := initDatabase(); err != nil {\n513\t\t\treturn err\n514\t\t}\n515\t\n516\t\t// Optimize database if requested\n517\t\tif flagOptimizeDB {\n518\t\t\tdb := repository.GetConnection()\n519\t\t\tcclog.Print(\"Running VACUUM to reclaim space and defragment database...\")\n520\t\t\tif _, err := db.DB.Exec(\"VACUUM\"); err != nil {\n521\t\t\t\treturn fmt.Errorf(\"VACUUM failed: %w\", err)\n522\t\t\t}\n523\t\t\tcclog.Print(\"Running ANALYZE to update query planner statistics...\")\n524\t\t\tif _, err := db.DB.Exec(\"ANALYZE\"); err != nil {\n525\t\t\t\treturn fmt.Errorf(\"ANALYZE failed: %w\", err)\n526\t\t\t}\n527\t\t\tcclog.Exitf(\"OptimizeDB Success: Database '%s' optimized (VACUUM + ANALYZE).\\n\", config.Keys.DB)\n528\t\t}\n529\t\n530\t\t// Handle user commands (add, delete, sync, JWT)\n531\t\tif err := handleUserCommands(); err != nil {\n532\t\t\treturn err\n533\t\t}\n534\t\n535\t\t// Initialize subsystems (archive, metrics, taggers)\n536\t\tif err := initSubsystems(); err != nil {\n537\t\t\treturn err\n538\t\t}\n539\t\n540\t\t// Handle checkpoint cleanup\n541\t\tif flagCleanupCheckpoints {\n542\t\t\tmscfg := ccconf.GetPackageConfig(\"metric-store\")\n543\t\t\tif mscfg == nil {\n544\t\t\t\treturn fmt.Errorf(\"metric-store configuration required for checkpoint cleanup\")\n545\t\t\t}\n546\t\t\tif err := json.Unmarshal(mscfg, &metricstore.Keys); err != nil {\n547\t\t\t\treturn fmt.Errorf(\"decoding metric-store config: %w\", err)\n548\t\t\t}\n549\t\t\tif metricstore.Keys.NumWorkers <= 0 {\n550\t\t\t\tmetricstore.Keys.NumWorkers = min(goruntime.NumCPU()/2+1, metricstore.DefaultMaxWorkers)\n551\t\t\t}\n552\t\n553\t\t\td, err := time.ParseDuration(metricstore.Keys.RetentionInMemory)\n554\t\t\tif err != nil {\n555\t\t\t\treturn fmt.Errorf(\"parsing retention-in-memory: %w\", err)\n556\t\t\t}\n557\t\t\tfrom := time.Now().Add(-d)\n558\t\t\tdeleteMode := metricstore.Keys.Cleanup == nil || metricstore.Keys.Cleanup.Mode != \"archive\"\n559\t\t\tcleanupDir := \"\"\n560\t\t\tif !deleteMode {\n561\t\t\t\tcleanupDir = metricstore.Keys.Cleanup.RootDir\n562\t\t\t}\n563\t\n564\t\t\tcclog.Infof(\"Cleaning up checkpoints older than %s...\", from.Format(time.RFC3339))\n565\t\t\tn, err := metricstore.CleanupCheckpoints(\n566\t\t\t\tmetricstore.Keys.Checkpoints.RootDir, cleanupDir, from.Unix(), deleteMode)\n567\t\t\tif err != nil {\n568\t\t\t\treturn fmt.Errorf(\"checkpoint cleanup: %w\", err)\n569\t\t\t}\n570\t\t\tif deleteMode {\n571\t\t\t\tcclog.Exitf(\"Cleanup done: %d checkpoint files deleted.\", n)\n572\t\t\t} else {\n573\t\t\t\tcclog.Exitf(\"Cleanup done: %d checkpoint files archived to parquet.\", n)\n574\t\t\t}\n575\t\t}\n576\t\n577\t\t// Exit if start server is not requested\n578\t\tif !flagServer {\n579\t\t\tcclog.Exit(\"No errors, server flag not set. Exiting cc-backend.\")\n580\t\t}\n581\t\n582\t\t// Run server with context\n583\t\tctx, cancel := context.WithCancel(context.Background())\n584\t\tdefer cancel()\n585\t\n586\t\treturn runServer(ctx)\n587\t}\n588\t\n589\tfunc main() {\n590\t\tif err := run(); err != nil {\n591\t\t\tcclog.Error(err.Error())\n592\t\t\tos.Exit(1)\n593\t\t}\n594\t}\n595\t"}]},"uuid":"8b77b04e-c172-45ba-83b3-ecc37645b2ff","timestamp":"2026-06-05T07:18:45.827Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go","content":"// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n// All rights reserved. This file is part of cc-backend.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\n// Package main provides the entry point for the ClusterCockpit backend server.\n// It orchestrates initialization of all subsystems including configuration,\n// database, authentication, and the HTTP server.\npackage main\n\nimport (\n\t\"context\"\n\t\"encoding/json\"\n\t\"fmt\"\n\t\"os\"\n\t\"os/signal\"\n\tgoruntime \"runtime\"\n\t\"runtime/debug\"\n\t\"strings\"\n\t\"sync\"\n\t\"syscall\"\n\t\"time\"\n\n\t\"github.com/ClusterCockpit/cc-backend/internal/archiver\"\n\t\"github.com/ClusterCockpit/cc-backend/internal/auth\"\n\t\"github.com/ClusterCockpit/cc-backend/internal/config\"\n\t\"github.com/ClusterCockpit/cc-backend/internal/importer\"\n\t\"github.com/ClusterCockpit/cc-backend/internal/metricdispatch\"\n\t\"github.com/ClusterCockpit/cc-backend/internal/repository\"\n\t\"github.com/ClusterCockpit/cc-backend/internal/tagger\"\n\t\"github.com/ClusterCockpit/cc-backend/internal/taskmanager\"\n\t\"github.com/ClusterCockpit/cc-backend/pkg/archive\"\n\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n\t\"github.com/ClusterCockpit/cc-backend/web\"\n\tccconf \"github.com/ClusterCockpit/cc-lib/v2/ccConfig\"\n\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/runtime\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/util\"\n\t\"github.com/google/gops/agent\"\n\t\"github.com/joho/godotenv\"\n\n\t_ \"github.com/mattn/go-sqlite3\"\n)\n\nconst logoString = `\n _____ _           _             ____           _          _ _\n/  ___| |_   _ ___| |_ ___ _ __ / ___|___   ___| | ___ __ (_) |_\n| |   | | | | / __| __/ _ \\ '__| |   / _ \\ / __| |/ / '_ \\| | __|\n| |___| | |_| \\__ \\ ||  __/ |  | |__| (_) | (__|   <| |_) | | |_\n\\_____|_|\\__,_|___/\\__\\___|_|   \\____\\___/ \\___|_|\\_\\ .__/|_|\\__|\n                                                    |_|\n`\n\n// Environment variable names\nconst (\n\tenvGOGC = \"GOGC\"\n)\n\n// Default configurations\nconst (\n\tdefaultArchiveConfig = `{\"kind\":\"file\",\"path\":\"./var/job-archive\"}`\n)\n\nvar (\n\tdate    string\n\tcommit  string\n\tversion string\n)\n\nfunc printVersion() {\n\tfmt.Print(logoString)\n\tfmt.Printf(\"Version:\\t%s\\n\", version)\n\tfmt.Printf(\"Git hash:\\t%s\\n\", commit)\n\tfmt.Printf(\"Build time:\\t%s\\n\", date)\n\tfmt.Printf(\"SQL db version:\\t%d\\n\", repository.Version)\n\tfmt.Printf(\"Job archive version:\\t%d\\n\", archive.Version)\n}\n\nfunc initGops() error {\n\tif !flagGops {\n\t\treturn nil\n\t}\n\n\tif err := agent.Listen(agent.Options{}); err != nil {\n\t\treturn fmt.Errorf(\"starting gops agent: %w\", err)\n\t}\n\treturn nil\n}\n\nfunc loadEnvironment() error {\n\tif err := godotenv.Load(); err != nil {\n\t\treturn fmt.Errorf(\"loading .env file: %w\", err)\n\t}\n\treturn nil\n}\n\nfunc initConfiguration() error {\n\tccconf.Init(flagConfigFile)\n\n\tcfg := ccconf.GetPackageConfig(\"main\")\n\tif cfg == nil {\n\t\treturn fmt.Errorf(\"main configuration must be present\")\n\t}\n\n\tconfig.Init(cfg)\n\treturn nil\n}\n\nfunc initDatabase() error {\n\tif config.Keys.DbConfig != nil {\n\t\tcfg := repository.DefaultConfig()\n\t\tdc := config.Keys.DbConfig\n\t\tif dc.CacheSizeMB > 0 {\n\t\t\tcfg.DbCacheSizeMB = dc.CacheSizeMB\n\t\t}\n\t\tif dc.SoftHeapLimitMB > 0 {\n\t\t\tcfg.DbSoftHeapLimitMB = dc.SoftHeapLimitMB\n\t\t}\n\t\tif dc.MaxOpenConnections > 0 {\n\t\t\tcfg.MaxOpenConnections = dc.MaxOpenConnections\n\t\t}\n\t\tif dc.MaxIdleConnections > 0 {\n\t\t\tcfg.MaxIdleConnections = dc.MaxIdleConnections\n\t\t}\n\t\tif dc.ConnectionMaxIdleTimeMins > 0 {\n\t\t\tcfg.ConnectionMaxIdleTime = time.Duration(dc.ConnectionMaxIdleTimeMins) * time.Minute\n\t\t}\n\t\tif dc.BusyTimeoutMs > 0 {\n\t\t\tcfg.BusyTimeoutMs = dc.BusyTimeoutMs\n\t\t}\n\t\trepository.SetConfig(cfg)\n\t}\n\trepository.Connect(config.Keys.DB)\n\treturn nil\n}\n\nfunc handleDatabaseCommands() error {\n\tif flagMigrateDB {\n\t\terr := repository.MigrateDB(config.Keys.DB)\n\t\tif err != nil {\n\t\t\treturn fmt.Errorf(\"migrating database to version %d: %w\", repository.Version, err)\n\t\t}\n\t\tcclog.Exitf(\"MigrateDB Success: Migrated SQLite database at '%s' to version %d.\\n\",\n\t\t\tconfig.Keys.DB, repository.Version)\n\t}\n\n\tif flagRevertDB {\n\t\terr := repository.RevertDB(config.Keys.DB)\n\t\tif err != nil {\n\t\t\treturn fmt.Errorf(\"reverting database to version %d: %w\", repository.Version-1, err)\n\t\t}\n\t\tcclog.Exitf(\"RevertDB Success: Reverted SQLite database at '%s' to version %d.\\n\",\n\t\t\tconfig.Keys.DB, repository.Version-1)\n\t}\n\n\tif flagForceDB {\n\t\terr := repository.ForceDB(config.Keys.DB)\n\t\tif err != nil {\n\t\t\treturn fmt.Errorf(\"forcing database to version %d: %w\", repository.Version, err)\n\t\t}\n\t\tcclog.Exitf(\"ForceDB Success: Forced SQLite database at '%s' to version %d.\\n\",\n\t\t\tconfig.Keys.DB, repository.Version)\n\t}\n\n\treturn nil\n}\n\nfunc handleUserCommands() error {\n\tif config.Keys.DisableAuthentication && (flagNewUser != \"\" || flagDelUser != \"\") {\n\t\treturn fmt.Errorf(\"--add-user and --del-user can only be used if authentication is enabled\")\n\t}\n\n\tif !config.Keys.DisableAuthentication {\n\t\tif cfg := ccconf.GetPackageConfig(\"auth\"); cfg != nil {\n\t\t\tauth.Init(&cfg)\n\t\t} else {\n\t\t\tcclog.Warn(\"Authentication disabled due to missing configuration\")\n\t\t\tauth.Init(nil)\n\t\t}\n\n\t\t// Check for default security keys\n\t\tcheckDefaultSecurityKeys()\n\n\t\tif flagNewUser != \"\" {\n\t\t\tif err := addUser(flagNewUser); err != nil {\n\t\t\t\treturn err\n\t\t\t}\n\t\t}\n\n\t\tif flagDelUser != \"\" {\n\t\t\tif err := delUser(flagDelUser); err != nil {\n\t\t\t\treturn err\n\t\t\t}\n\t\t}\n\n\t\tauthHandle := auth.GetAuthInstance()\n\n\t\tif flagSyncLDAP {\n\t\t\tif err := syncLDAP(authHandle); err != nil {\n\t\t\t\treturn err\n\t\t\t}\n\t\t}\n\n\t\tif flagGenJWT != \"\" {\n\t\t\tif err := generateJWT(authHandle, flagGenJWT); err != nil {\n\t\t\t\treturn err\n\t\t\t}\n\t\t}\n\t}\n\n\treturn nil\n}\n\n// checkDefaultSecurityKeys warns if default JWT keys are detected\nfunc checkDefaultSecurityKeys() {\n\t// Default JWT public key from init.go\n\tdefaultJWTPublic := \"REDACTED\"\n\n\tif os.Getenv(\"JWT_PUBLIC_KEY\") == defaultJWTPublic {\n\t\tcclog.Warn(\"Using default JWT keys - not recommended for production environments\")\n\t}\n}\n\nfunc addUser(userSpec string) error {\n\tparts := strings.SplitN(userSpec, \":\", 3)\n\tif len(parts) != 3 || len(parts[0]) == 0 {\n\t\treturn fmt.Errorf(\"invalid user format, want: <username>:[admin,support,manager,api,user]:<password>, have: %s\", userSpec)\n\t}\n\n\tur := repository.GetUserRepository()\n\tif err := ur.AddUser(&schema.User{\n\t\tUsername: parts[0],\n\t\tProjects: make([]string, 0),\n\t\tPassword: parts[2],\n\t\tRoles:    strings.Split(parts[1], \",\"),\n\t}); err != nil {\n\t\treturn fmt.Errorf(\"adding user '%s' with roles '%s': %w\", parts[0], parts[1], err)\n\t}\n\n\tcclog.Infof(\"Add User: Added new user '%s' with roles '%s'\", parts[0], parts[1])\n\treturn nil\n}\n\nfunc delUser(username string) error {\n\tur := repository.GetUserRepository()\n\tif err := ur.DelUser(username); err != nil {\n\t\treturn fmt.Errorf(\"deleting user '%s': %w\", username, err)\n\t}\n\tcclog.Infof(\"Delete User: Deleted user '%s' from DB\", username)\n\treturn nil\n}\n\nfunc syncLDAP(authHandle *auth.Authentication) error {\n\tif authHandle.LdapAuth == nil {\n\t\treturn fmt.Errorf(\"LDAP authentication is not configured\")\n\t}\n\n\tif err := authHandle.LdapAuth.Sync(); err != nil {\n\t\treturn fmt.Errorf(\"synchronizing LDAP: %w\", err)\n\t}\n\n\tcclog.Print(\"Sync LDAP: LDAP synchronization successfull.\")\n\treturn nil\n}\n\nfunc generateJWT(authHandle *auth.Authentication, username string) error {\n\tur := repository.GetUserRepository()\n\tuser, err := ur.GetUser(username)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"getting user '%s': %w\", username, err)\n\t}\n\n\tif !user.HasRole(schema.RoleAPI) {\n\t\tcclog.Warnf(\"JWT: User '%s' does not have the role 'api'. REST API endpoints will return error!\\n\", user.Username)\n\t}\n\n\tjwt, err := authHandle.JwtAuth.ProvideJWT(user)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"generating JWT for user '%s': %w\", user.Username, err)\n\t}\n\n\tcclog.Printf(\"JWT: Successfully generated JWT for user '%s': %s\\n\", user.Username, jwt)\n\treturn nil\n}\n\nfunc initSubsystems() error {\n\t// Initialize nats client\n\tnatsConfig := ccconf.GetPackageConfig(\"nats\")\n\tif err := nats.Init(natsConfig); err != nil {\n\t\tcclog.Warnf(\"initializing (optional) nats client: %s\", err.Error())\n\t}\n\tnats.Connect()\n\n\t// Initialize job archive\n\tarchiveCfg := ccconf.GetPackageConfig(\"archive\")\n\tif archiveCfg == nil {\n\t\tcclog.Debug(\"Archive configuration not found, using default archive configuration\")\n\t\tarchiveCfg = json.RawMessage(defaultArchiveConfig)\n\t}\n\tif err := archive.Init(archiveCfg); err != nil {\n\t\treturn fmt.Errorf(\"initializing archive: %w\", err)\n\t}\n\n\t// Handle database re-initialization\n\tif flagReinitDB {\n\t\tif err := importer.InitDB(); err != nil {\n\t\t\treturn fmt.Errorf(\"re-initializing repository DB: %w\", err)\n\t\t}\n\t\tcclog.Print(\"Init DB: Successfully re-initialized repository DB.\")\n\t}\n\n\t// Handle job import\n\tif flagImportJob != \"\" {\n\t\tif err := importer.HandleImportFlag(flagImportJob); err != nil {\n\t\t\treturn fmt.Errorf(\"importing job: %w\", err)\n\t\t}\n\t\tcclog.Infof(\"Import Job: Imported Job '%s' into DB\", flagImportJob)\n\t}\n\n\t// Initialize taggers\n\tif config.Keys.EnableJobTaggers {\n\t\ttagger.Init()\n\t}\n\n\t// Apply tags if requested\n\tif flagApplyTags {\n\t\ttagger.Init()\n\n\t\tif err := tagger.RunTaggers(); err != nil {\n\t\t\treturn fmt.Errorf(\"running job taggers: %w\", err)\n\t\t}\n\t}\n\n\treturn nil\n}\n\nfunc runServer(ctx context.Context) error {\n\tvar wg sync.WaitGroup\n\n\t// Initialize metric store if configuration is provided\n\thaveMetricstore := false\n\tmscfg := ccconf.GetPackageConfig(\"metric-store\")\n\tif mscfg != nil {\n\t\tmetrics := metricstore.BuildMetricList()\n\t\tmetricstore.Init(mscfg, metrics, &wg)\n\n\t\t// Inject repository as NodeProvider to break import cycle\n\t\tms := metricstore.GetMemoryStore()\n\t\tjobRepo := repository.GetJobRepository()\n\t\tms.SetNodeProvider(jobRepo)\n\t\tmetricstore.MetricStoreHandle = &metricstore.InternalMetricStore{}\n\t\thaveMetricstore = true\n\t} else {\n\t\tmetricstore.MetricStoreHandle = nil\n\t\tcclog.Debug(\"missing internal metricstore configuration\")\n\t}\n\n\t// Initialize external metric stores if configuration is provided\n\tmscfg = ccconf.GetPackageConfig(\"metric-store-external\")\n\tif mscfg != nil {\n\t\terr := metricdispatch.Init(mscfg)\n\n\t\tif err != nil {\n\t\t\tcclog.Debugf(\"error while initializing external metricdispatch: %v\", err)\n\t\t} else {\n\t\t\thaveMetricstore = true\n\t\t}\n\t}\n\n\tif !haveMetricstore {\n\t\treturn fmt.Errorf(\"missing metricstore configuration\")\n\t}\n\n\t// Start archiver and task manager\n\tarchiver.Start(repository.GetJobRepository(), ctx)\n\ttaskmanager.Start(ccconf.GetPackageConfig(\"cron\"), ccconf.GetPackageConfig(\"archive\"))\n\n\t// Initialize web UI\n\tcfg := ccconf.GetPackageConfig(\"ui\")\n\tif err := web.Init(cfg); err != nil {\n\t\treturn fmt.Errorf(\"initializing web UI: %w\", err)\n\t}\n\n\t// Initialize HTTP server\n\tsrv, err := NewServer(version, commit, date)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"creating server: %w\", err)\n\t}\n\n\t// Channel to collect errors from server\n\terrChan := make(chan error, 1)\n\n\t// Start HTTP server\n\twg.Go(func() {\n\t\tif err := srv.Start(ctx); err != nil {\n\t\t\terrChan <- err\n\t\t}\n\t})\n\n\t// Handle shutdown signals\n\twg.Add(1)\n\tsigs := make(chan os.Signal, 1)\n\tsignal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)\n\tgo func() {\n\t\tdefer wg.Done()\n\t\tselect {\n\t\tcase <-sigs:\n\t\t\tcclog.Info(\"Shutdown signal received\")\n\t\tcase <-ctx.Done():\n\t\t}\n\n\t\truntime.SystemdNotify(false, \"Shutting down ...\")\n\t\tsrv.Shutdown(ctx)\n\t\tutil.FsWatcherShutdown()\n\t\ttaskmanager.Shutdown()\n\t}()\n\n\t// Set GC percent if not configured\n\tif os.Getenv(envGOGC) == \"\" {\n\t\t// trigger GC when heap grows 15% above the previous live set\n\t\tdebug.SetGCPercent(15)\n\t}\n\truntime.SystemdNotify(true, \"running\")\n\n\twaitDone := make(chan struct{})\n\tgo func() {\n\t\twg.Wait()\n\t\tclose(waitDone)\n\t}()\n\n\tgo func() {\n\t\t<-waitDone\n\t\tclose(errChan)\n\t}()\n\n\t// Wait for either:\n\t// 1. An error from server startup\n\t// 2. Completion of all goroutines (normal shutdown or crash)\n\tselect {\n\tcase err := <-errChan:\n\t\t// errChan will be closed when waitDone is closed, which happens\n\t\t// when all goroutines complete (either from normal shutdown or error)\n\t\tif err != nil {\n\t\t\treturn err\n\t\t}\n\tcase <-time.After(100 * time.Millisecond):\n\t\t// Give the server 100ms to start and report any immediate startup errors\n\t\t// After that, just wait for normal shutdown completion\n\t\tselect {\n\t\tcase err := <-errChan:\n\t\t\tif err != nil {\n\t\t\t\treturn err\n\t\t\t}\n\t\tcase <-waitDone:\n\t\t\t// Normal shutdown completed\n\t\t}\n\t}\n\n\tcclog.Print(\"Graceful shutdown completed!\")\n\treturn nil\n}\n\nfunc run() error {\n\tcliInit()\n\n\tif flagVersion {\n\t\tprintVersion()\n\t\treturn nil\n\t}\n\n\t// Initialize logger\n\tcclog.Init(flagLogLevel, flagLogDateTime)\n\n\t// Handle init flag\n\tif flagInit {\n\t\tinitEnv()\n\t\tcclog.Exit(\"Successfully setup environment!\\n\" +\n\t\t\t\"Please review config.json and .env and adjust it to your needs.\\n\" +\n\t\t\t\"Add your job-archive at ./var/job-archive.\")\n\t}\n\n\t// Initialize gops agent\n\tif err := initGops(); err != nil {\n\t\treturn err\n\t}\n\n\t// Initialize subsystems in dependency order:\n\t// 1. Load environment variables from .env file (contains sensitive configuration)\n\t// 2. Load configuration from config.json (may reference environment variables)\n\t// 3. Handle database migration commands if requested\n\t// 4. Initialize database connection (requires config for connection string)\n\t// 5. Handle user commands if requested (requires database and authentication config)\n\t// 6. Initialize subsystems like archive and metrics (require config and database)\n\n\t// Load environment and configuration\n\tif err := loadEnvironment(); err != nil {\n\t\treturn err\n\t}\n\n\tif err := initConfiguration(); err != nil {\n\t\treturn err\n\t}\n\n\t// Handle database migration (migrate, revert, force)\n\tif err := handleDatabaseCommands(); err != nil {\n\t\treturn err\n\t}\n\n\t// Initialize database\n\tif err := initDatabase(); err != nil {\n\t\treturn err\n\t}\n\n\t// Optimize database if requested\n\tif flagOptimizeDB {\n\t\tdb := repository.GetConnection()\n\t\tcclog.Print(\"Running VACUUM to reclaim space and defragment database...\")\n\t\tif _, err := db.DB.Exec(\"VACUUM\"); err != nil {\n\t\t\treturn fmt.Errorf(\"VACUUM failed: %w\", err)\n\t\t}\n\t\tcclog.Print(\"Running ANALYZE to update query planner statistics...\")\n\t\tif _, err := db.DB.Exec(\"ANALYZE\"); err != nil {\n\t\t\treturn fmt.Errorf(\"ANALYZE failed: %w\", err)\n\t\t}\n\t\tcclog.Exitf(\"OptimizeDB Success: Database '%s' optimized (VACUUM + ANALYZE).\\n\", config.Keys.DB)\n\t}\n\n\t// Handle user commands (add, delete, sync, JWT)\n\tif err := handleUserCommands(); err != nil {\n\t\treturn err\n\t}\n\n\t// Initialize subsystems (archive, metrics, taggers)\n\tif err := initSubsystems(); err != nil {\n\t\treturn err\n\t}\n\n\t// Handle checkpoint cleanup\n\tif flagCleanupCheckpoints {\n\t\tmscfg := ccconf.GetPackageConfig(\"metric-store\")\n\t\tif mscfg == nil {\n\t\t\treturn fmt.Errorf(\"metric-store configuration required for checkpoint cleanup\")\n\t\t}\n\t\tif err := json.Unmarshal(mscfg, &metricstore.Keys); err != nil {\n\t\t\treturn fmt.Errorf(\"decoding metric-store config: %w\", err)\n\t\t}\n\t\tif metricstore.Keys.NumWorkers <= 0 {\n\t\t\tmetricstore.Keys.NumWorkers = min(goruntime.NumCPU()/2+1, metricstore.DefaultMaxWorkers)\n\t\t}\n\n\t\td, err := time.ParseDuration(metricstore.Keys.RetentionInMemory)\n\t\tif err != nil {\n\t\t\treturn fmt.Errorf(\"parsing retention-in-memory: %w\", err)\n\t\t}\n\t\tfrom := time.Now().Add(-d)\n\t\tdeleteMode := metricstore.Keys.Cleanup == nil || metricstore.Keys.Cleanup.Mode != \"archive\"\n\t\tcleanupDir := \"\"\n\t\tif !deleteMode {\n\t\t\tcleanupDir = metricstore.Keys.Cleanup.RootDir\n\t\t}\n\n\t\tcclog.Infof(\"Cleaning up checkpoints older than %s...\", from.Format(time.RFC3339))\n\t\tn, err := metricstore.CleanupCheckpoints(\n\t\t\tmetricstore.Keys.Checkpoints.RootDir, cleanupDir, from.Unix(), deleteMode)\n\t\tif err != nil {\n\t\t\treturn fmt.Errorf(\"checkpoint cleanup: %w\", err)\n\t\t}\n\t\tif deleteMode {\n\t\t\tcclog.Exitf(\"Cleanup done: %d checkpoint files deleted.\", n)\n\t\t} else {\n\t\t\tcclog.Exitf(\"Cleanup done: %d checkpoint files archived to parquet.\", n)\n\t\t}\n\t}\n\n\t// Exit if start server is not requested\n\tif !flagServer {\n\t\tcclog.Exit(\"No errors, server flag not set. Exiting cc-backend.\")\n\t}\n\n\t// Run server with context\n\tctx, cancel := context.WithCancel(context.Background())\n\tdefer cancel()\n\n\treturn runServer(ctx)\n}\n\nfunc main() {\n\tif err := run(); err != nil {\n\t\tcclog.Error(err.Error())\n\t\tos.Exit(1)\n\t}\n}\n","numLines":595,"startLine":1,"totalLines":595}},"sourceToolAssistantUUID":"249c1064-7c4b-4a72-9b71-2f843e25bac5","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"8b77b04e-c172-45ba-83b3-ecc37645b2ff","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_01L9GTLvsq7uD8jr1gt8PX5n","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01TUnBvKKc4KCMrSHdhEtyXh","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":2158,"cache_creation_input_tokens":43,"cache_read_input_tokens":100447,"output_tokens":872,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":43,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":2158,"output_tokens":872,"cache_read_input_tokens":100447,"cache_creation_input_tokens":43,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":43},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011CbjhsjYYoVumcX8AaEdEB","type":"assistant","uuid":"07804a3a-6b73-497d-a32c-d5509a057832","timestamp":"2026-06-05T07:18:46.142Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"07804a3a-6b73-497d-a32c-d5509a057832","isSidechain":false,"promptId":"e03eec5c-111d-4cd6-a2ad-e4499d1dc6b1","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01TUnBvKKc4KCMrSHdhEtyXh","type":"tool_result","content":"1\t// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n2\t// All rights reserved. This file is part of cc-backend.\n3\t// Use of this source code is governed by a MIT-style\n4\t// license that can be found in the LICENSE file.\n5\t\n6\t// Package main provides the entry point for the ClusterCockpit backend server.\n7\t// This file contains HTTP server setup, routing configuration, and\n8\t// authentication middleware integration.\n9\tpackage main\n10\t\n11\timport (\n12\t\t\"context\"\n13\t\t\"crypto/tls\"\n14\t\t\"encoding/json\"\n15\t\t\"errors\"\n16\t\t\"fmt\"\n17\t\t\"net\"\n18\t\t\"net/http\"\n19\t\t\"os\"\n20\t\t\"strings\"\n21\t\t\"sync\"\n22\t\t\"time\"\n23\t\n24\t\t\"github.com/99designs/gqlgen/graphql\"\n25\t\t\"github.com/99designs/gqlgen/graphql/handler\"\n26\t\t\"github.com/99designs/gqlgen/graphql/handler/extension\"\n27\t\t\"github.com/99designs/gqlgen/graphql/handler/transport\"\n28\t\t\"github.com/99designs/gqlgen/graphql/playground\"\n29\t\t\"github.com/ClusterCockpit/cc-backend/internal/api\"\n30\t\t\"github.com/ClusterCockpit/cc-backend/internal/archiver\"\n31\t\t\"github.com/ClusterCockpit/cc-backend/internal/auth\"\n32\t\t\"github.com/ClusterCockpit/cc-backend/internal/config\"\n33\t\t\"github.com/ClusterCockpit/cc-backend/internal/graph\"\n34\t\t\"github.com/ClusterCockpit/cc-backend/internal/graph/generated\"\n35\t\t\"github.com/ClusterCockpit/cc-backend/internal/routerConfig\"\n36\t\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n37\t\t\"github.com/ClusterCockpit/cc-backend/web\"\n38\t\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n39\t\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n40\t\t\"github.com/ClusterCockpit/cc-lib/v2/runtime\"\n41\t\t\"github.com/go-chi/chi/v5\"\n42\t\t\"github.com/go-chi/chi/v5/middleware\"\n43\t\t\"github.com/go-chi/cors\"\n44\t\thttpSwagger \"github.com/swaggo/http-swagger\"\n45\t)\n46\t\n47\tvar buildInfo web.Build\n48\t\n49\t// Environment variable names\n50\tconst (\n51\t\tenvDebug = \"DEBUG\"\n52\t)\n53\t\n54\t// maxQueryComplexity bounds the cost of a single GraphQL query to mitigate\n55\t// denial-of-service via deeply nested or heavily aliased queries. The default\n56\t// per-field cost is 1, so this leaves ample headroom for legitimate dashboard\n57\t// queries while rejecting pathological ones.\n58\tconst maxQueryComplexity = 5000\n59\t\n60\t// Server encapsulates the HTTP server state and dependencies\n61\ttype Server struct {\n62\t\trouter        chi.Router\n63\t\tserver        *http.Server\n64\t\trestAPIHandle *api.RestAPI\n65\t\tnatsAPIHandle *api.NatsAPI\n66\t}\n67\t\n68\tfunc onFailureResponse(rw http.ResponseWriter, r *http.Request, err error) {\n69\t\trw.Header().Add(\"Content-Type\", \"application/json\")\n70\t\trw.WriteHeader(http.StatusUnauthorized)\n71\t\tjson.NewEncoder(rw).Encode(map[string]string{\n72\t\t\t\"status\": http.StatusText(http.StatusUnauthorized),\n73\t\t\t\"error\":  err.Error(),\n74\t\t})\n75\t}\n76\t\n77\t// NewServer creates and initializes a new Server instance\n78\tfunc NewServer(version, commit, buildDate string) (*Server, error) {\n79\t\tbuildInfo = web.Build{Version: version, Hash: commit, Buildtime: buildDate}\n80\t\n81\t\ts := &Server{\n82\t\t\trouter: chi.NewRouter(),\n83\t\t}\n84\t\n85\t\tif err := s.init(); err != nil {\n86\t\t\treturn nil, err\n87\t\t}\n88\t\n89\t\treturn s, nil\n90\t}\n91\t\n92\tfunc (s *Server) init() error {\n93\t\t// Setup the http.Handler/Router used by the server\n94\t\tgraph.Init()\n95\t\tresolver := graph.GetResolverInstance()\n96\t\tgraphQLServer := handler.New(\n97\t\t\tgenerated.NewExecutableSchema(generated.Config{Resolvers: resolver}))\n98\t\n99\t\tgraphQLServer.AddTransport(transport.POST{})\n100\t\tgraphQLServer.Use(extension.FixedComplexityLimit(maxQueryComplexity))\n101\t\n102\t\t// Inject a per-request stats cache so that grouped statistics queries\n103\t\t// sharing the same (filter, groupBy) pair are executed only once.\n104\t\tgraphQLServer.AroundOperations(func(ctx context.Context, next graphql.OperationHandler) graphql.ResponseHandler {\n105\t\t\treturn next(graph.WithStatsGroupCache(ctx))\n106\t\t})\n107\t\n108\t\tif os.Getenv(envDebug) != \"1\" {\n109\t\t\t// Having this handler means that a error message is returned via GraphQL instead of the connection simply beeing closed.\n110\t\t\t// The problem with this is that then, no more stacktrace is printed to stderr.\n111\t\t\tgraphQLServer.SetRecoverFunc(func(ctx context.Context, err any) error {\n112\t\t\t\tswitch e := err.(type) {\n113\t\t\t\tcase string:\n114\t\t\t\t\treturn fmt.Errorf(\"MAIN > Panic: %s\", e)\n115\t\t\t\tcase error:\n116\t\t\t\t\treturn fmt.Errorf(\"MAIN > Panic caused by: %s\", e.Error())\n117\t\t\t\t}\n118\t\n119\t\t\t\treturn errors.New(\"MAIN > Internal server error (panic)\")\n120\t\t\t})\n121\t\t}\n122\t\n123\t\tauthHandle := auth.GetAuthInstance()\n124\t\n125\t\t// Middleware must be defined before routes in chi\n126\t\ts.router.Use(func(next http.Handler) http.Handler {\n127\t\t\treturn http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {\n128\t\t\t\tstart := time.Now()\n129\t\t\t\tww := middleware.NewWrapResponseWriter(rw, r.ProtoMajor)\n130\t\t\t\tnext.ServeHTTP(ww, r)\n131\t\t\t\tcclog.Debugf(\"%s %s (%d, %.02fkb, %dms)\",\n132\t\t\t\t\tr.Method, r.URL.RequestURI(),\n133\t\t\t\t\tww.Status(), float32(ww.BytesWritten())/1024,\n134\t\t\t\t\ttime.Since(start).Milliseconds())\n135\t\t\t})\n136\t\t})\n137\t\ts.router.Use(middleware.Compress(5))\n138\t\ts.router.Use(middleware.Recoverer)\n139\t\ts.router.Use(cors.Handler(cors.Options{\n140\t\t\tAllowCredentials: false,\n141\t\t\tAllowedHeaders:   []string{\"X-Requested-With\", \"Content-Type\", \"Authorization\", \"Origin\"},\n142\t\t\tAllowedMethods:   []string{\"GET\", \"POST\", \"HEAD\", \"OPTIONS\"},\n143\t\t\tAllowedOrigins:   []string{\"*\"},\n144\t\t}))\n145\t\ts.router.Use(func(next http.Handler) http.Handler {\n146\t\t\treturn http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {\n147\t\t\t\th := rw.Header()\n148\t\t\t\th.Set(\"X-Content-Type-Options\", \"nosniff\")\n149\t\t\t\th.Set(\"X-Frame-Options\", \"DENY\")\n150\t\t\t\th.Set(\"Referrer-Policy\", \"same-origin\")\n151\t\t\t\t// Conservative CSP: blocks clickjacking (frame-ancestors), plugin\n152\t\t\t\t// content (object-src) and <base> injection (base-uri) without\n153\t\t\t\t// restricting scripts/styles, so it cannot break the self-hosted\n154\t\t\t\t// SPA which relies on inline scripts. A full script-src policy needs\n155\t\t\t\t// per-template nonces and should be added separately.\n156\t\t\t\th.Set(\"Content-Security-Policy\", \"frame-ancestors 'none'; object-src 'none'; base-uri 'self'\")\n157\t\t\t\tif r.TLS != nil || r.Header.Get(\"X-Forwarded-Proto\") == \"https\" {\n158\t\t\t\t\th.Set(\"Strict-Transport-Security\", \"max-age=31536000; includeSubDomains\")\n159\t\t\t\t}\n160\t\t\t\tnext.ServeHTTP(rw, r)\n161\t\t\t})\n162\t\t})\n163\t\n164\t\t// CSRF defense-in-depth on top of the SameSite=Lax session cookie: reject\n165\t\t// cross-site state-changing requests. Modern browsers set Sec-Fetch-Site on\n166\t\t// every request, so this stops a malicious site from driving cookie-\n167\t\t// authenticated POST/PUT/DELETE/PATCH calls. It fails open when the header is\n168\t\t// absent or not \"cross-site\", so non-browser API clients and the same-origin\n169\t\t// SPA are unaffected.\n170\t\ts.router.Use(func(next http.Handler) http.Handler {\n171\t\t\treturn http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {\n172\t\t\t\tswitch r.Method {\n173\t\t\t\tcase http.MethodGet, http.MethodHead, http.MethodOptions, http.MethodTrace:\n174\t\t\t\tdefault:\n175\t\t\t\t\tif r.Header.Get(\"Sec-Fetch-Site\") == \"cross-site\" {\n176\t\t\t\t\t\thttp.Error(rw, \"cross-site request blocked\", http.StatusForbidden)\n177\t\t\t\t\t\treturn\n178\t\t\t\t\t}\n179\t\t\t\t}\n180\t\t\t\tnext.ServeHTTP(rw, r)\n181\t\t\t})\n182\t\t})\n183\t\n184\t\ts.restAPIHandle = api.New()\n185\t\n186\t\tinfo := map[string]any{}\n187\t\tinfo[\"hasOpenIDConnect\"] = false\n188\t\n189\t\tif auth.Keys.OpenIDConfig != nil {\n190\t\t\topenIDConnect := auth.NewOIDC(authHandle)\n191\t\t\topenIDConnect.RegisterEndpoints(s.router)\n192\t\t\tinfo[\"hasOpenIDConnect\"] = true\n193\t\t}\n194\t\n195\t\ts.router.Get(\"/login\", func(rw http.ResponseWriter, r *http.Request) {\n196\t\t\trw.Header().Add(\"Content-Type\", \"text/html; charset=utf-8\")\n197\t\t\tcclog.Debugf(\"##%v##\", info)\n198\t\t\tweb.RenderTemplate(rw, \"login.tmpl\", &web.Page{Title: \"Login\", Build: buildInfo, Infos: info})\n199\t\t})\n200\t\ts.router.HandleFunc(\"/imprint\", func(rw http.ResponseWriter, r *http.Request) {\n201\t\t\trw.Header().Add(\"Content-Type\", \"text/html; charset=utf-8\")\n202\t\t\tweb.RenderTemplate(rw, \"imprint.tmpl\", &web.Page{Title: \"Imprint\", Build: buildInfo})\n203\t\t})\n204\t\ts.router.HandleFunc(\"/privacy\", func(rw http.ResponseWriter, r *http.Request) {\n205\t\t\trw.Header().Add(\"Content-Type\", \"text/html; charset=utf-8\")\n206\t\t\tweb.RenderTemplate(rw, \"privacy.tmpl\", &web.Page{Title: \"Privacy\", Build: buildInfo})\n207\t\t})\n208\t\n209\t\tif !config.Keys.DisableAuthentication {\n210\t\t\t// Create login failure handler (used by both /login and /jwt-login)\n211\t\t\tloginFailureHandler := func(rw http.ResponseWriter, r *http.Request, err error) {\n212\t\t\t\trw.Header().Add(\"Content-Type\", \"text/html; charset=utf-8\")\n213\t\t\t\trw.WriteHeader(http.StatusUnauthorized)\n214\t\t\t\tweb.RenderTemplate(rw, \"login.tmpl\", &web.Page{\n215\t\t\t\t\tTitle:   \"Login failed - ClusterCockpit\",\n216\t\t\t\t\tMsgType: \"alert-warning\",\n217\t\t\t\t\tMessage: err.Error(),\n218\t\t\t\t\tBuild:   buildInfo,\n219\t\t\t\t\tInfos:   info,\n220\t\t\t\t})\n221\t\t\t}\n222\t\n223\t\t\ts.router.Post(\"/login\", authHandle.Login(loginFailureHandler).ServeHTTP)\n224\t\t\ts.router.HandleFunc(\"/jwt-login\", authHandle.Login(loginFailureHandler).ServeHTTP)\n225\t\n226\t\t\ts.router.Post(\"/logout\", authHandle.Logout(\n227\t\t\t\thttp.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {\n228\t\t\t\t\trw.Header().Add(\"Content-Type\", \"text/html; charset=utf-8\")\n229\t\t\t\t\trw.WriteHeader(http.StatusOK)\n230\t\t\t\t\tweb.RenderTemplate(rw, \"login.tmpl\", &web.Page{\n231\t\t\t\t\t\tTitle:   \"Bye - ClusterCockpit\",\n232\t\t\t\t\t\tMsgType: \"alert-info\",\n233\t\t\t\t\t\tMessage: \"Logout successful\",\n234\t\t\t\t\t\tBuild:   buildInfo,\n235\t\t\t\t\t\tInfos:   info,\n236\t\t\t\t\t})\n237\t\t\t\t})).ServeHTTP)\n238\t\t}\n239\t\n240\t\tif flagDev {\n241\t\t\ts.router.Handle(\"/playground\", playground.Handler(\"GraphQL playground\", \"/query\"))\n242\t\t\ts.router.Get(\"/swagger/*\", httpSwagger.Handler(\n243\t\t\t\thttpSwagger.URL(\"http://\"+config.Keys.Addr+\"/swagger/doc.json\")))\n244\t\t}\n245\t\n246\t\t// Secured routes (require authentication)\n247\t\ts.router.Group(func(secured chi.Router) {\n248\t\t\tif !config.Keys.DisableAuthentication {\n249\t\t\t\tsecured.Use(func(next http.Handler) http.Handler {\n250\t\t\t\t\treturn authHandle.Auth(\n251\t\t\t\t\t\tnext,\n252\t\t\t\t\t\tfunc(rw http.ResponseWriter, r *http.Request, err error) {\n253\t\t\t\t\t\t\trw.WriteHeader(http.StatusUnauthorized)\n254\t\t\t\t\t\t\tweb.RenderTemplate(rw, \"login.tmpl\", &web.Page{\n255\t\t\t\t\t\t\t\tTitle:    \"Authentication failed - ClusterCockpit\",\n256\t\t\t\t\t\t\t\tMsgType:  \"alert-danger\",\n257\t\t\t\t\t\t\t\tMessage:  err.Error(),\n258\t\t\t\t\t\t\t\tBuild:    buildInfo,\n259\t\t\t\t\t\t\t\tInfos:    info,\n260\t\t\t\t\t\t\t\tRedirect: r.RequestURI,\n261\t\t\t\t\t\t\t})\n262\t\t\t\t\t\t})\n263\t\t\t\t})\n264\t\t\t}\n265\t\n266\t\t\tsecured.Handle(\"/query\", graphQLServer)\n267\t\n268\t\t\tsecured.HandleFunc(\"/search\", func(rw http.ResponseWriter, r *http.Request) {\n269\t\t\t\trouterConfig.HandleSearchBar(rw, r, buildInfo)\n270\t\t\t})\n271\t\n272\t\t\trouterConfig.SetupRoutes(secured, buildInfo)\n273\t\t})\n274\t\n275\t\t// API routes (JWT token auth)\n276\t\ts.router.Route(\"/api\", func(apiRouter chi.Router) {\n277\t\t\t// Main API routes with API auth\n278\t\t\tapiRouter.Group(func(securedapi chi.Router) {\n279\t\t\t\tif !config.Keys.DisableAuthentication {\n280\t\t\t\t\tsecuredapi.Use(func(next http.Handler) http.Handler {\n281\t\t\t\t\t\treturn authHandle.AuthAPI(next, onFailureResponse)\n282\t\t\t\t\t})\n283\t\t\t\t}\n284\t\t\t\ts.restAPIHandle.MountAPIRoutes(securedapi)\n285\t\t\t})\n286\t\n287\t\t\t// Metric store API routes with separate auth\n288\t\t\tapiRouter.Group(func(metricstoreapi chi.Router) {\n289\t\t\t\tif !config.Keys.DisableAuthentication {\n290\t\t\t\t\tmetricstoreapi.Use(func(next http.Handler) http.Handler {\n291\t\t\t\t\t\treturn authHandle.AuthMetricStoreAPI(next, onFailureResponse)\n292\t\t\t\t\t})\n293\t\t\t\t}\n294\t\t\t\ts.restAPIHandle.MountMetricStoreAPIRoutes(metricstoreapi)\n295\t\t\t})\n296\t\t})\n297\t\n298\t\t// User API routes\n299\t\ts.router.Route(\"/userapi\", func(userapi chi.Router) {\n300\t\t\tif !config.Keys.DisableAuthentication {\n301\t\t\t\tuserapi.Use(func(next http.Handler) http.Handler {\n302\t\t\t\t\treturn authHandle.AuthUserAPI(next, onFailureResponse)\n303\t\t\t\t})\n304\t\t\t}\n305\t\t\ts.restAPIHandle.MountUserAPIRoutes(userapi)\n306\t\t})\n307\t\n308\t\t// Config API routes (uses Group with full paths to avoid shadowing\n309\t\t// the /config page route that is registered in the secured group)\n310\t\ts.router.Group(func(configapi chi.Router) {\n311\t\t\tif !config.Keys.DisableAuthentication {\n312\t\t\t\tconfigapi.Use(func(next http.Handler) http.Handler {\n313\t\t\t\t\treturn authHandle.AuthConfigAPI(next, onFailureResponse)\n314\t\t\t\t})\n315\t\t\t}\n316\t\t\ts.restAPIHandle.MountConfigAPIRoutes(configapi)\n317\t\t})\n318\t\n319\t\t// Frontend API routes\n320\t\ts.router.Route(\"/frontend\", func(frontendapi chi.Router) {\n321\t\t\tif !config.Keys.DisableAuthentication {\n322\t\t\t\tfrontendapi.Use(func(next http.Handler) http.Handler {\n323\t\t\t\t\treturn authHandle.AuthFrontendAPI(next, onFailureResponse)\n324\t\t\t\t})\n325\t\t\t}\n326\t\t\ts.restAPIHandle.MountFrontendAPIRoutes(frontendapi)\n327\t\t})\n328\t\n329\t\tif config.Keys.APISubjects != nil {\n330\t\t\ts.natsAPIHandle = api.NewNatsAPI()\n331\t\t\tif err := s.natsAPIHandle.StartSubscriptions(); err != nil {\n332\t\t\t\treturn fmt.Errorf(\"starting NATS subscriptions: %w\", err)\n333\t\t\t}\n334\t\t}\n335\t\n336\t\t// 404 handler for pages and API routes\n337\t\tnotFoundHandler := func(rw http.ResponseWriter, r *http.Request) {\n338\t\t\tif strings.HasPrefix(r.URL.Path, \"/api/\") || strings.HasPrefix(r.URL.Path, \"/userapi/\") ||\n339\t\t\t\tstrings.HasPrefix(r.URL.Path, \"/frontend/\") || strings.HasPrefix(r.URL.Path, \"/config/\") {\n340\t\t\t\trw.Header().Set(\"Content-Type\", \"application/json\")\n341\t\t\t\trw.WriteHeader(http.StatusNotFound)\n342\t\t\t\tjson.NewEncoder(rw).Encode(map[string]string{\n343\t\t\t\t\t\"status\": \"Resource not found\",\n344\t\t\t\t\t\"error\":  \"the requested endpoint does not exist\",\n345\t\t\t\t})\n346\t\t\t\treturn\n347\t\t\t}\n348\t\t\trw.Header().Set(\"Content-Type\", \"text/html; charset=utf-8\")\n349\t\t\trw.WriteHeader(http.StatusNotFound)\n350\t\t\tweb.RenderTemplate(rw, \"404.tmpl\", &web.Page{\n351\t\t\t\tTitle: \"Page Not Found\",\n352\t\t\t\tBuild: buildInfo,\n353\t\t\t})\n354\t\t}\n355\t\n356\t\t// Set NotFound on the router so chi uses it for all unmatched routes,\n357\t\t// including those under subrouters like /api, /userapi, /frontend, etc.\n358\t\ts.router.NotFound(notFoundHandler)\n359\t\n360\t\tif config.Keys.EmbedStaticFiles {\n361\t\t\tif i, err := os.Stat(\"./var/img\"); err == nil {\n362\t\t\t\tif i.IsDir() {\n363\t\t\t\t\tcclog.Info(\"Use local directory for static images\")\n364\t\t\t\t\ts.router.Handle(\"/img/*\", http.StripPrefix(\"/img/\", http.FileServer(http.Dir(\"./var/img\"))))\n365\t\t\t\t}\n366\t\t\t}\n367\t\t\tfileServer := http.StripPrefix(\"/\", web.ServeFiles())\n368\t\t\ts.router.Handle(\"/*\", http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {\n369\t\t\t\tif web.StaticFileExists(r.URL.Path) {\n370\t\t\t\t\tfileServer.ServeHTTP(rw, r)\n371\t\t\t\t\treturn\n372\t\t\t\t}\n373\t\t\t\tnotFoundHandler(rw, r)\n374\t\t\t}))\n375\t\t} else {\n376\t\t\tstaticDir := http.Dir(config.Keys.StaticFiles)\n377\t\t\tfileServer := http.FileServer(staticDir)\n378\t\t\ts.router.Handle(\"/*\", http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {\n379\t\t\t\tf, err := staticDir.Open(r.URL.Path)\n380\t\t\t\tif err == nil {\n381\t\t\t\t\tf.Close()\n382\t\t\t\t\tfileServer.ServeHTTP(rw, r)\n383\t\t\t\t\treturn\n384\t\t\t\t}\n385\t\t\t\tnotFoundHandler(rw, r)\n386\t\t\t}))\n387\t\t}\n388\t\n389\t\treturn nil\n390\t}\n391\t\n392\t// Server timeout defaults (in seconds)\n393\tconst (\n394\t\tdefaultReadHeaderTimeout = 20\n395\t\tdefaultWriteTimeout      = 20\n396\t)\n397\t\n398\tfunc (s *Server) Start(ctx context.Context) error {\n399\t\t// Use configurable timeouts with defaults\n400\t\treadHeaderTimeout := time.Duration(defaultReadHeaderTimeout) * time.Second\n401\t\twriteTimeout := time.Duration(defaultWriteTimeout) * time.Second\n402\t\n403\t\ts.server = &http.Server{\n404\t\t\tReadHeaderTimeout: readHeaderTimeout,\n405\t\t\tWriteTimeout:      writeTimeout,\n406\t\t\tHandler:           s.router,\n407\t\t\tAddr:              config.Keys.Addr,\n408\t\t}\n409\t\n410\t\t// Start http or https server\n411\t\tlistener, err := net.Listen(\"tcp\", config.Keys.Addr)\n412\t\tif err != nil {\n413\t\t\treturn fmt.Errorf(\"starting listener on '%s': %w\", config.Keys.Addr, err)\n414\t\t}\n415\t\n416\t\tif !strings.HasSuffix(config.Keys.Addr, \":80\") && config.Keys.RedirectHTTPTo != \"\" {\n417\t\t\tgo func() {\n418\t\t\t\thttp.ListenAndServe(\":80\", http.RedirectHandler(config.Keys.RedirectHTTPTo, http.StatusMovedPermanently))\n419\t\t\t}()\n420\t\t}\n421\t\n422\t\tif config.Keys.HTTPSCertFile != \"\" && config.Keys.HTTPSKeyFile != \"\" {\n423\t\t\tcert, err := tls.LoadX509KeyPair(\n424\t\t\t\tconfig.Keys.HTTPSCertFile, config.Keys.HTTPSKeyFile)\n425\t\t\tif err != nil {\n426\t\t\t\treturn fmt.Errorf(\"loading X509 keypair (check 'https-cert-file' and 'https-key-file' in config.json): %w\", err)\n427\t\t\t}\n428\t\t\tlistener = tls.NewListener(listener, &tls.Config{\n429\t\t\t\tCertificates: []tls.Certificate{cert},\n430\t\t\t\tCipherSuites: []uint16{\n431\t\t\t\t\ttls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,\n432\t\t\t\t\ttls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,\n433\t\t\t\t},\n434\t\t\t\tMinVersion:               tls.VersionTLS12,\n435\t\t\t\tPreferServerCipherSuites: true,\n436\t\t\t})\n437\t\t\tcclog.Infof(\"HTTPS server listening at %s...\", config.Keys.Addr)\n438\t\t} else {\n439\t\t\tcclog.Infof(\"HTTP server listening at %s...\", config.Keys.Addr)\n440\t\t}\n441\t\t//\n442\t\t// Because this program will want to bind to a privileged port (like 80), the listener must\n443\t\t// be established first, then the user can be changed, and after that,\n444\t\t// the actual http server can be started.\n445\t\tif err := runtime.DropPrivileges(config.Keys.Group, config.Keys.User); err != nil {\n446\t\t\treturn fmt.Errorf(\"dropping privileges: %w\", err)\n447\t\t}\n448\t\n449\t\tif err = s.server.Serve(listener); err != nil && err != http.ErrServerClosed {\n450\t\t\treturn fmt.Errorf(\"server failed: %w\", err)\n451\t\t}\n452\t\treturn nil\n453\t}\n454\t\n455\tfunc (s *Server) Shutdown(ctx context.Context) {\n456\t\tshutdownStart := time.Now()\n457\t\n458\t\tnatsStart := time.Now()\n459\t\tnc := nats.GetClient()\n460\t\tif nc != nil {\n461\t\t\tnc.Close()\n462\t\t}\n463\t\tcclog.Infof(\"Shutdown: NATS closed (%v)\", time.Since(natsStart))\n464\t\n465\t\thttpStart := time.Now()\n466\t\tshutdownCtx, cancel := context.WithTimeout(ctx, 60*time.Second)\n467\t\tdefer cancel()\n468\t\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n469\t\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n470\t\t}\n471\t\tcclog.Infof(\"Shutdown: HTTP server stopped (%v)\", time.Since(httpStart))\n472\t\n473\t\t// Run metricstore and archiver shutdown concurrently.\n474\t\t// They are independent: metricstore writes .bin snapshots,\n475\t\t// archiver flushes pending job archives.\n476\t\tstoreStart := time.Now()\n477\t\tdone := make(chan struct{})\n478\t\tgo func() {\n479\t\t\tdefer close(done)\n480\t\t\tvar wg sync.WaitGroup\n481\t\n482\t\t\tif ms := metricstore.GetMemoryStore(); ms != nil {\n483\t\t\t\twg.Go(func() {\n484\t\t\t\t\tmetricstore.Shutdown()\n485\t\t\t\t})\n486\t\t\t}\n487\t\n488\t\t\twg.Go(func() {\n489\t\t\t\tif err := archiver.Shutdown(60 * time.Second); err != nil {\n490\t\t\t\t\tcclog.Warnf(\"Archiver shutdown: %v\", err)\n491\t\t\t\t}\n492\t\t\t})\n493\t\n494\t\t\twg.Wait()\n495\t\t}()\n496\t\n497\t\tselect {\n498\t\tcase <-done:\n499\t\t\tcclog.Infof(\"Shutdown: metricstore + archiver completed (%v)\", time.Since(storeStart))\n500\t\tcase <-time.After(60 * time.Second):\n501\t\t\tcclog.Warnf(\"Shutdown deadline exceeded after %v, forcing exit\", time.Since(shutdownStart))\n502\t\t}\n503\t\n504\t\tcclog.Infof(\"Shutdown: total time %v\", time.Since(shutdownStart))\n505\t}\n506\t"}]},"uuid":"b5584ce1-8afb-4284-ac8b-0fe5eabeaae6","timestamp":"2026-06-05T07:18:46.153Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go","content":"// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n// All rights reserved. This file is part of cc-backend.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\n// Package main provides the entry point for the ClusterCockpit backend server.\n// This file contains HTTP server setup, routing configuration, and\n// authentication middleware integration.\npackage main\n\nimport (\n\t\"context\"\n\t\"crypto/tls\"\n\t\"encoding/json\"\n\t\"errors\"\n\t\"fmt\"\n\t\"net\"\n\t\"net/http\"\n\t\"os\"\n\t\"strings\"\n\t\"sync\"\n\t\"time\"\n\n\t\"github.com/99designs/gqlgen/graphql\"\n\t\"github.com/99designs/gqlgen/graphql/handler\"\n\t\"github.com/99designs/gqlgen/graphql/handler/extension\"\n\t\"github.com/99designs/gqlgen/graphql/handler/transport\"\n\t\"github.com/99designs/gqlgen/graphql/playground\"\n\t\"github.com/ClusterCockpit/cc-backend/internal/api\"\n\t\"github.com/ClusterCockpit/cc-backend/internal/archiver\"\n\t\"github.com/ClusterCockpit/cc-backend/internal/auth\"\n\t\"github.com/ClusterCockpit/cc-backend/internal/config\"\n\t\"github.com/ClusterCockpit/cc-backend/internal/graph\"\n\t\"github.com/ClusterCockpit/cc-backend/internal/graph/generated\"\n\t\"github.com/ClusterCockpit/cc-backend/internal/routerConfig\"\n\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n\t\"github.com/ClusterCockpit/cc-backend/web\"\n\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/runtime\"\n\t\"github.com/go-chi/chi/v5\"\n\t\"github.com/go-chi/chi/v5/middleware\"\n\t\"github.com/go-chi/cors\"\n\thttpSwagger \"github.com/swaggo/http-swagger\"\n)\n\nvar buildInfo web.Build\n\n// Environment variable names\nconst (\n\tenvDebug = \"DEBUG\"\n)\n\n// maxQueryComplexity bounds the cost of a single GraphQL query to mitigate\n// denial-of-service via deeply nested or heavily aliased queries. The default\n// per-field cost is 1, so this leaves ample headroom for legitimate dashboard\n// queries while rejecting pathological ones.\nconst maxQueryComplexity = 5000\n\n// Server encapsulates the HTTP server state and dependencies\ntype Server struct {\n\trouter        chi.Router\n\tserver        *http.Server\n\trestAPIHandle *api.RestAPI\n\tnatsAPIHandle *api.NatsAPI\n}\n\nfunc onFailureResponse(rw http.ResponseWriter, r *http.Request, err error) {\n\trw.Header().Add(\"Content-Type\", \"application/json\")\n\trw.WriteHeader(http.StatusUnauthorized)\n\tjson.NewEncoder(rw).Encode(map[string]string{\n\t\t\"status\": http.StatusText(http.StatusUnauthorized),\n\t\t\"error\":  err.Error(),\n\t})\n}\n\n// NewServer creates and initializes a new Server instance\nfunc NewServer(version, commit, buildDate string) (*Server, error) {\n\tbuildInfo = web.Build{Version: version, Hash: commit, Buildtime: buildDate}\n\n\ts := &Server{\n\t\trouter: chi.NewRouter(),\n\t}\n\n\tif err := s.init(); err != nil {\n\t\treturn nil, err\n\t}\n\n\treturn s, nil\n}\n\nfunc (s *Server) init() error {\n\t// Setup the http.Handler/Router used by the server\n\tgraph.Init()\n\tresolver := graph.GetResolverInstance()\n\tgraphQLServer := handler.New(\n\t\tgenerated.NewExecutableSchema(generated.Config{Resolvers: resolver}))\n\n\tgraphQLServer.AddTransport(transport.POST{})\n\tgraphQLServer.Use(extension.FixedComplexityLimit(maxQueryComplexity))\n\n\t// Inject a per-request stats cache so that grouped statistics queries\n\t// sharing the same (filter, groupBy) pair are executed only once.\n\tgraphQLServer.AroundOperations(func(ctx context.Context, next graphql.OperationHandler) graphql.ResponseHandler {\n\t\treturn next(graph.WithStatsGroupCache(ctx))\n\t})\n\n\tif os.Getenv(envDebug) != \"1\" {\n\t\t// Having this handler means that a error message is returned via GraphQL instead of the connection simply beeing closed.\n\t\t// The problem with this is that then, no more stacktrace is printed to stderr.\n\t\tgraphQLServer.SetRecoverFunc(func(ctx context.Context, err any) error {\n\t\t\tswitch e := err.(type) {\n\t\t\tcase string:\n\t\t\t\treturn fmt.Errorf(\"MAIN > Panic: %s\", e)\n\t\t\tcase error:\n\t\t\t\treturn fmt.Errorf(\"MAIN > Panic caused by: %s\", e.Error())\n\t\t\t}\n\n\t\t\treturn errors.New(\"MAIN > Internal server error (panic)\")\n\t\t})\n\t}\n\n\tauthHandle := auth.GetAuthInstance()\n\n\t// Middleware must be defined before routes in chi\n\ts.router.Use(func(next http.Handler) http.Handler {\n\t\treturn http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {\n\t\t\tstart := time.Now()\n\t\t\tww := middleware.NewWrapResponseWriter(rw, r.ProtoMajor)\n\t\t\tnext.ServeHTTP(ww, r)\n\t\t\tcclog.Debugf(\"%s %s (%d, %.02fkb, %dms)\",\n\t\t\t\tr.Method, r.URL.RequestURI(),\n\t\t\t\tww.Status(), float32(ww.BytesWritten())/1024,\n\t\t\t\ttime.Since(start).Milliseconds())\n\t\t})\n\t})\n\ts.router.Use(middleware.Compress(5))\n\ts.router.Use(middleware.Recoverer)\n\ts.router.Use(cors.Handler(cors.Options{\n\t\tAllowCredentials: false,\n\t\tAllowedHeaders:   []string{\"X-Requested-With\", \"Content-Type\", \"Authorization\", \"Origin\"},\n\t\tAllowedMethods:   []string{\"GET\", \"POST\", \"HEAD\", \"OPTIONS\"},\n\t\tAllowedOrigins:   []string{\"*\"},\n\t}))\n\ts.router.Use(func(next http.Handler) http.Handler {\n\t\treturn http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {\n\t\t\th := rw.Header()\n\t\t\th.Set(\"X-Content-Type-Options\", \"nosniff\")\n\t\t\th.Set(\"X-Frame-Options\", \"DENY\")\n\t\t\th.Set(\"Referrer-Policy\", \"same-origin\")\n\t\t\t// Conservative CSP: blocks clickjacking (frame-ancestors), plugin\n\t\t\t// content (object-src) and <base> injection (base-uri) without\n\t\t\t// restricting scripts/styles, so it cannot break the self-hosted\n\t\t\t// SPA which relies on inline scripts. A full script-src policy needs\n\t\t\t// per-template nonces and should be added separately.\n\t\t\th.Set(\"Content-Security-Policy\", \"frame-ancestors 'none'; object-src 'none'; base-uri 'self'\")\n\t\t\tif r.TLS != nil || r.Header.Get(\"X-Forwarded-Proto\") == \"https\" {\n\t\t\t\th.Set(\"Strict-Transport-Security\", \"max-age=31536000; includeSubDomains\")\n\t\t\t}\n\t\t\tnext.ServeHTTP(rw, r)\n\t\t})\n\t})\n\n\t// CSRF defense-in-depth on top of the SameSite=Lax session cookie: reject\n\t// cross-site state-changing requests. Modern browsers set Sec-Fetch-Site on\n\t// every request, so this stops a malicious site from driving cookie-\n\t// authenticated POST/PUT/DELETE/PATCH calls. It fails open when the header is\n\t// absent or not \"cross-site\", so non-browser API clients and the same-origin\n\t// SPA are unaffected.\n\ts.router.Use(func(next http.Handler) http.Handler {\n\t\treturn http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {\n\t\t\tswitch r.Method {\n\t\t\tcase http.MethodGet, http.MethodHead, http.MethodOptions, http.MethodTrace:\n\t\t\tdefault:\n\t\t\t\tif r.Header.Get(\"Sec-Fetch-Site\") == \"cross-site\" {\n\t\t\t\t\thttp.Error(rw, \"cross-site request blocked\", http.StatusForbidden)\n\t\t\t\t\treturn\n\t\t\t\t}\n\t\t\t}\n\t\t\tnext.ServeHTTP(rw, r)\n\t\t})\n\t})\n\n\ts.restAPIHandle = api.New()\n\n\tinfo := map[string]any{}\n\tinfo[\"hasOpenIDConnect\"] = false\n\n\tif auth.Keys.OpenIDConfig != nil {\n\t\topenIDConnect := auth.NewOIDC(authHandle)\n\t\topenIDConnect.RegisterEndpoints(s.router)\n\t\tinfo[\"hasOpenIDConnect\"] = true\n\t}\n\n\ts.router.Get(\"/login\", func(rw http.ResponseWriter, r *http.Request) {\n\t\trw.Header().Add(\"Content-Type\", \"text/html; charset=utf-8\")\n\t\tcclog.Debugf(\"##%v##\", info)\n\t\tweb.RenderTemplate(rw, \"login.tmpl\", &web.Page{Title: \"Login\", Build: buildInfo, Infos: info})\n\t})\n\ts.router.HandleFunc(\"/imprint\", func(rw http.ResponseWriter, r *http.Request) {\n\t\trw.Header().Add(\"Content-Type\", \"text/html; charset=utf-8\")\n\t\tweb.RenderTemplate(rw, \"imprint.tmpl\", &web.Page{Title: \"Imprint\", Build: buildInfo})\n\t})\n\ts.router.HandleFunc(\"/privacy\", func(rw http.ResponseWriter, r *http.Request) {\n\t\trw.Header().Add(\"Content-Type\", \"text/html; charset=utf-8\")\n\t\tweb.RenderTemplate(rw, \"privacy.tmpl\", &web.Page{Title: \"Privacy\", Build: buildInfo})\n\t})\n\n\tif !config.Keys.DisableAuthentication {\n\t\t// Create login failure handler (used by both /login and /jwt-login)\n\t\tloginFailureHandler := func(rw http.ResponseWriter, r *http.Request, err error) {\n\t\t\trw.Header().Add(\"Content-Type\", \"text/html; charset=utf-8\")\n\t\t\trw.WriteHeader(http.StatusUnauthorized)\n\t\t\tweb.RenderTemplate(rw, \"login.tmpl\", &web.Page{\n\t\t\t\tTitle:   \"Login failed - ClusterCockpit\",\n\t\t\t\tMsgType: \"alert-warning\",\n\t\t\t\tMessage: err.Error(),\n\t\t\t\tBuild:   buildInfo,\n\t\t\t\tInfos:   info,\n\t\t\t})\n\t\t}\n\n\t\ts.router.Post(\"/login\", authHandle.Login(loginFailureHandler).ServeHTTP)\n\t\ts.router.HandleFunc(\"/jwt-login\", authHandle.Login(loginFailureHandler).ServeHTTP)\n\n\t\ts.router.Post(\"/logout\", authHandle.Logout(\n\t\t\thttp.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {\n\t\t\t\trw.Header().Add(\"Content-Type\", \"text/html; charset=utf-8\")\n\t\t\t\trw.WriteHeader(http.StatusOK)\n\t\t\t\tweb.RenderTemplate(rw, \"login.tmpl\", &web.Page{\n\t\t\t\t\tTitle:   \"Bye - ClusterCockpit\",\n\t\t\t\t\tMsgType: \"alert-info\",\n\t\t\t\t\tMessage: \"Logout successful\",\n\t\t\t\t\tBuild:   buildInfo,\n\t\t\t\t\tInfos:   info,\n\t\t\t\t})\n\t\t\t})).ServeHTTP)\n\t}\n\n\tif flagDev {\n\t\ts.router.Handle(\"/playground\", playground.Handler(\"GraphQL playground\", \"/query\"))\n\t\ts.router.Get(\"/swagger/*\", httpSwagger.Handler(\n\t\t\thttpSwagger.URL(\"http://\"+config.Keys.Addr+\"/swagger/doc.json\")))\n\t}\n\n\t// Secured routes (require authentication)\n\ts.router.Group(func(secured chi.Router) {\n\t\tif !config.Keys.DisableAuthentication {\n\t\t\tsecured.Use(func(next http.Handler) http.Handler {\n\t\t\t\treturn authHandle.Auth(\n\t\t\t\t\tnext,\n\t\t\t\t\tfunc(rw http.ResponseWriter, r *http.Request, err error) {\n\t\t\t\t\t\trw.WriteHeader(http.StatusUnauthorized)\n\t\t\t\t\t\tweb.RenderTemplate(rw, \"login.tmpl\", &web.Page{\n\t\t\t\t\t\t\tTitle:    \"Authentication failed - ClusterCockpit\",\n\t\t\t\t\t\t\tMsgType:  \"alert-danger\",\n\t\t\t\t\t\t\tMessage:  err.Error(),\n\t\t\t\t\t\t\tBuild:    buildInfo,\n\t\t\t\t\t\t\tInfos:    info,\n\t\t\t\t\t\t\tRedirect: r.RequestURI,\n\t\t\t\t\t\t})\n\t\t\t\t\t})\n\t\t\t})\n\t\t}\n\n\t\tsecured.Handle(\"/query\", graphQLServer)\n\n\t\tsecured.HandleFunc(\"/search\", func(rw http.ResponseWriter, r *http.Request) {\n\t\t\trouterConfig.HandleSearchBar(rw, r, buildInfo)\n\t\t})\n\n\t\trouterConfig.SetupRoutes(secured, buildInfo)\n\t})\n\n\t// API routes (JWT token auth)\n\ts.router.Route(\"/api\", func(apiRouter chi.Router) {\n\t\t// Main API routes with API auth\n\t\tapiRouter.Group(func(securedapi chi.Router) {\n\t\t\tif !config.Keys.DisableAuthentication {\n\t\t\t\tsecuredapi.Use(func(next http.Handler) http.Handler {\n\t\t\t\t\treturn authHandle.AuthAPI(next, onFailureResponse)\n\t\t\t\t})\n\t\t\t}\n\t\t\ts.restAPIHandle.MountAPIRoutes(securedapi)\n\t\t})\n\n\t\t// Metric store API routes with separate auth\n\t\tapiRouter.Group(func(metricstoreapi chi.Router) {\n\t\t\tif !config.Keys.DisableAuthentication {\n\t\t\t\tmetricstoreapi.Use(func(next http.Handler) http.Handler {\n\t\t\t\t\treturn authHandle.AuthMetricStoreAPI(next, onFailureResponse)\n\t\t\t\t})\n\t\t\t}\n\t\t\ts.restAPIHandle.MountMetricStoreAPIRoutes(metricstoreapi)\n\t\t})\n\t})\n\n\t// User API routes\n\ts.router.Route(\"/userapi\", func(userapi chi.Router) {\n\t\tif !config.Keys.DisableAuthentication {\n\t\t\tuserapi.Use(func(next http.Handler) http.Handler {\n\t\t\t\treturn authHandle.AuthUserAPI(next, onFailureResponse)\n\t\t\t})\n\t\t}\n\t\ts.restAPIHandle.MountUserAPIRoutes(userapi)\n\t})\n\n\t// Config API routes (uses Group with full paths to avoid shadowing\n\t// the /config page route that is registered in the secured group)\n\ts.router.Group(func(configapi chi.Router) {\n\t\tif !config.Keys.DisableAuthentication {\n\t\t\tconfigapi.Use(func(next http.Handler) http.Handler {\n\t\t\t\treturn authHandle.AuthConfigAPI(next, onFailureResponse)\n\t\t\t})\n\t\t}\n\t\ts.restAPIHandle.MountConfigAPIRoutes(configapi)\n\t})\n\n\t// Frontend API routes\n\ts.router.Route(\"/frontend\", func(frontendapi chi.Router) {\n\t\tif !config.Keys.DisableAuthentication {\n\t\t\tfrontendapi.Use(func(next http.Handler) http.Handler {\n\t\t\t\treturn authHandle.AuthFrontendAPI(next, onFailureResponse)\n\t\t\t})\n\t\t}\n\t\ts.restAPIHandle.MountFrontendAPIRoutes(frontendapi)\n\t})\n\n\tif config.Keys.APISubjects != nil {\n\t\ts.natsAPIHandle = api.NewNatsAPI()\n\t\tif err := s.natsAPIHandle.StartSubscriptions(); err != nil {\n\t\t\treturn fmt.Errorf(\"starting NATS subscriptions: %w\", err)\n\t\t}\n\t}\n\n\t// 404 handler for pages and API routes\n\tnotFoundHandler := func(rw http.ResponseWriter, r *http.Request) {\n\t\tif strings.HasPrefix(r.URL.Path, \"/api/\") || strings.HasPrefix(r.URL.Path, \"/userapi/\") ||\n\t\t\tstrings.HasPrefix(r.URL.Path, \"/frontend/\") || strings.HasPrefix(r.URL.Path, \"/config/\") {\n\t\t\trw.Header().Set(\"Content-Type\", \"application/json\")\n\t\t\trw.WriteHeader(http.StatusNotFound)\n\t\t\tjson.NewEncoder(rw).Encode(map[string]string{\n\t\t\t\t\"status\": \"Resource not found\",\n\t\t\t\t\"error\":  \"the requested endpoint does not exist\",\n\t\t\t})\n\t\t\treturn\n\t\t}\n\t\trw.Header().Set(\"Content-Type\", \"text/html; charset=utf-8\")\n\t\trw.WriteHeader(http.StatusNotFound)\n\t\tweb.RenderTemplate(rw, \"404.tmpl\", &web.Page{\n\t\t\tTitle: \"Page Not Found\",\n\t\t\tBuild: buildInfo,\n\t\t})\n\t}\n\n\t// Set NotFound on the router so chi uses it for all unmatched routes,\n\t// including those under subrouters like /api, /userapi, /frontend, etc.\n\ts.router.NotFound(notFoundHandler)\n\n\tif config.Keys.EmbedStaticFiles {\n\t\tif i, err := os.Stat(\"./var/img\"); err == nil {\n\t\t\tif i.IsDir() {\n\t\t\t\tcclog.Info(\"Use local directory for static images\")\n\t\t\t\ts.router.Handle(\"/img/*\", http.StripPrefix(\"/img/\", http.FileServer(http.Dir(\"./var/img\"))))\n\t\t\t}\n\t\t}\n\t\tfileServer := http.StripPrefix(\"/\", web.ServeFiles())\n\t\ts.router.Handle(\"/*\", http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {\n\t\t\tif web.StaticFileExists(r.URL.Path) {\n\t\t\t\tfileServer.ServeHTTP(rw, r)\n\t\t\t\treturn\n\t\t\t}\n\t\t\tnotFoundHandler(rw, r)\n\t\t}))\n\t} else {\n\t\tstaticDir := http.Dir(config.Keys.StaticFiles)\n\t\tfileServer := http.FileServer(staticDir)\n\t\ts.router.Handle(\"/*\", http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {\n\t\t\tf, err := staticDir.Open(r.URL.Path)\n\t\t\tif err == nil {\n\t\t\t\tf.Close()\n\t\t\t\tfileServer.ServeHTTP(rw, r)\n\t\t\t\treturn\n\t\t\t}\n\t\t\tnotFoundHandler(rw, r)\n\t\t}))\n\t}\n\n\treturn nil\n}\n\n// Server timeout defaults (in seconds)\nconst (\n\tdefaultReadHeaderTimeout = 20\n\tdefaultWriteTimeout      = 20\n)\n\nfunc (s *Server) Start(ctx context.Context) error {\n\t// Use configurable timeouts with defaults\n\treadHeaderTimeout := time.Duration(defaultReadHeaderTimeout) * time.Second\n\twriteTimeout := time.Duration(defaultWriteTimeout) * time.Second\n\n\ts.server = &http.Server{\n\t\tReadHeaderTimeout: readHeaderTimeout,\n\t\tWriteTimeout:      writeTimeout,\n\t\tHandler:           s.router,\n\t\tAddr:              config.Keys.Addr,\n\t}\n\n\t// Start http or https server\n\tlistener, err := net.Listen(\"tcp\", config.Keys.Addr)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"starting listener on '%s': %w\", config.Keys.Addr, err)\n\t}\n\n\tif !strings.HasSuffix(config.Keys.Addr, \":80\") && config.Keys.RedirectHTTPTo != \"\" {\n\t\tgo func() {\n\t\t\thttp.ListenAndServe(\":80\", http.RedirectHandler(config.Keys.RedirectHTTPTo, http.StatusMovedPermanently))\n\t\t}()\n\t}\n\n\tif config.Keys.HTTPSCertFile != \"\" && config.Keys.HTTPSKeyFile != \"\" {\n\t\tcert, err := tls.LoadX509KeyPair(\n\t\t\tconfig.Keys.HTTPSCertFile, config.Keys.HTTPSKeyFile)\n\t\tif err != nil {\n\t\t\treturn fmt.Errorf(\"loading X509 keypair (check 'https-cert-file' and 'https-key-file' in config.json): %w\", err)\n\t\t}\n\t\tlistener = tls.NewListener(listener, &tls.Config{\n\t\t\tCertificates: []tls.Certificate{cert},\n\t\t\tCipherSuites: []uint16{\n\t\t\t\ttls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,\n\t\t\t\ttls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,\n\t\t\t},\n\t\t\tMinVersion:               tls.VersionTLS12,\n\t\t\tPreferServerCipherSuites: true,\n\t\t})\n\t\tcclog.Infof(\"HTTPS server listening at %s...\", config.Keys.Addr)\n\t} else {\n\t\tcclog.Infof(\"HTTP server listening at %s...\", config.Keys.Addr)\n\t}\n\t//\n\t// Because this program will want to bind to a privileged port (like 80), the listener must\n\t// be established first, then the user can be changed, and after that,\n\t// the actual http server can be started.\n\tif err := runtime.DropPrivileges(config.Keys.Group, config.Keys.User); err != nil {\n\t\treturn fmt.Errorf(\"dropping privileges: %w\", err)\n\t}\n\n\tif err = s.server.Serve(listener); err != nil && err != http.ErrServerClosed {\n\t\treturn fmt.Errorf(\"server failed: %w\", err)\n\t}\n\treturn nil\n}\n\nfunc (s *Server) Shutdown(ctx context.Context) {\n\tshutdownStart := time.Now()\n\n\tnatsStart := time.Now()\n\tnc := nats.GetClient()\n\tif nc != nil {\n\t\tnc.Close()\n\t}\n\tcclog.Infof(\"Shutdown: NATS closed (%v)\", time.Since(natsStart))\n\n\thttpStart := time.Now()\n\tshutdownCtx, cancel := context.WithTimeout(ctx, 60*time.Second)\n\tdefer cancel()\n\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n\t}\n\tcclog.Infof(\"Shutdown: HTTP server stopped (%v)\", time.Since(httpStart))\n\n\t// Run metricstore and archiver shutdown concurrently.\n\t// They are independent: metricstore writes .bin snapshots,\n\t// archiver flushes pending job archives.\n\tstoreStart := time.Now()\n\tdone := make(chan struct{})\n\tgo func() {\n\t\tdefer close(done)\n\t\tvar wg sync.WaitGroup\n\n\t\tif ms := metricstore.GetMemoryStore(); ms != nil {\n\t\t\twg.Go(func() {\n\t\t\t\tmetricstore.Shutdown()\n\t\t\t})\n\t\t}\n\n\t\twg.Go(func() {\n\t\t\tif err := archiver.Shutdown(60 * time.Second); err != nil {\n\t\t\t\tcclog.Warnf(\"Archiver shutdown: %v\", err)\n\t\t\t}\n\t\t})\n\n\t\twg.Wait()\n\t}()\n\n\tselect {\n\tcase <-done:\n\t\tcclog.Infof(\"Shutdown: metricstore + archiver completed (%v)\", time.Since(storeStart))\n\tcase <-time.After(60 * time.Second):\n\t\tcclog.Warnf(\"Shutdown deadline exceeded after %v, forcing exit\", time.Since(shutdownStart))\n\t}\n\n\tcclog.Infof(\"Shutdown: total time %v\", time.Since(shutdownStart))\n}\n","numLines":506,"startLine":1,"totalLines":506}},"sourceToolAssistantUUID":"07804a3a-6b73-497d-a32c-d5509a057832","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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+{"type":"last-prompt","lastPrompt":"Do a thorough code  review with a focus on critical and severe issues. Initially focus on the initialization, startup and shutdown.","leafUuid":"0a361b47-b957-4146-a71c-2c4813ead786","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63"}
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+{"type":"agent-name","agentName":"fix-wal-reset-on-shutdown","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63"}
+{"type":"mode","mode":"normal","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63"}
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"}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":131,"cache_creation_input_tokens":20251,"cache_read_input_tokens":100490,"output_tokens":5600,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":20251,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":131,"output_tokens":5600,"cache_read_input_tokens":100490,"cache_creation_input_tokens":20251,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":20251},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011Cbjhti4XZc7SLqo9YD6LV","type":"assistant","uuid":"bee013cc-c15c-42ae-be93-2864237b76ed","timestamp":"2026-06-05T07:19:26.992Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"bee013cc-c15c-42ae-be93-2864237b76ed","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_012jMLKk3S7ebUtARrGaquc1","type":"message","role":"assistant","content":[{"type":"text","text":"This is a code-review task. I've read the two central files (`main.go`, `server.go`) and already have deep knowledge of `pkg/metricstore` Init/Shutdown from this session. Let me dispatch focused exploration of the remaining subsystem lifecycles and the cross-subsystem shutdown ordering risks I've spotted."}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":131,"cache_creation_input_tokens":20251,"cache_read_input_tokens":100490,"output_tokens":5600,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":20251,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":131,"output_tokens":5600,"cache_read_input_tokens":100490,"cache_creation_input_tokens":20251,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":20251},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011Cbjhti4XZc7SLqo9YD6LV","type":"assistant","uuid":"1915cfc8-1b77-4965-b9bd-a805dd60e86b","timestamp":"2026-06-05T07:19:28.394Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"1915cfc8-1b77-4965-b9bd-a805dd60e86b","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_012jMLKk3S7ebUtARrGaquc1","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01VBX7kF2shZTMDZCJav21rr","name":"Agent","input":{"description":"Review archiver/taskmanager lifecycle","subagent_type":"Explore","prompt":"I'm doing a code review of the cc-backend Go project focused on CRITICAL and SEVERE issues in initialization, startup, and shutdown.\n\nInvestigate the lifecycle of the archiver and taskmanager subsystems. Read these and report exact code with file:line references:\n\n1. `internal/archiver/` — the `Start(jobRepo, ctx)` function and `Shutdown(timeout)` function. How are goroutines/channels started? Is there a worker pool? What happens to in-flight or queued archive jobs on Shutdown? Can Shutdown be called when Start was never called (nil channel / closed channel)? Can `archiver.Shutdown` deadlock or panic? Is there a risk of send-on-closed-channel or double-close?\n\n2. `internal/taskmanager/` — `Start(cronCfg, archiveCfg)` and `Shutdown()`. What does it manage (cron jobs)? Does Shutdown wait for running tasks? Any global/singleton state that breaks if Start not called?\n\n3. Look for any package-level singletons, `sync.Once`, or global variables in these packages that affect re-initialization or shutdown safety.\n\nReport concrete problems: nil-channel sends, double-close panics, goroutine leaks, missing waits, data loss of queued work on shutdown, ignored errors. Quote the relevant code with file:line. Be thorough but only report what you can verify in the code. Do not propose fixes — just identify and explain issues with evidence."},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":131,"cache_creation_input_tokens":20251,"cache_read_input_tokens":100490,"output_tokens":5600,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":20251,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":131,"output_tokens":5600,"cache_read_input_tokens":100490,"cache_creation_input_tokens":20251,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":20251},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011Cbjhti4XZc7SLqo9YD6LV","type":"assistant","uuid":"cd24ed0b-aac8-4a0d-8469-af59a2c782fa","timestamp":"2026-06-05T07:19:36.921Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"cd24ed0b-aac8-4a0d-8469-af59a2c782fa","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_012jMLKk3S7ebUtARrGaquc1","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01P4SPRdvPhwADVSfWxufJUB","name":"Agent","input":{"description":"Review metricstore NATS lifecycle","subagent_type":"Explore","prompt":"I'm doing a code review of the cc-backend Go project (ClusterCockpit) focused on CRITICAL and SEVERE issues in initialization, startup, and shutdown.\n\nFocus on the interaction between the NATS client and the metricstore's NATS metric ingestion during startup and shutdown. Report exact code with file:line references.\n\nContext: In `cmd/cc-backend/main.go`, `nats.Init()` + `nats.Connect()` happen early. In `cmd/cc-backend/server.go` `Server.Shutdown()`, `nats.GetClient().Close()` is called FIRST, then HTTP server shutdown, then `metricstore.Shutdown()` runs concurrently with `archiver.Shutdown()`.\n\nInvestigate:\n1. `pkg/metricstore/metricstore.go` `Init()` starts a goroutine `ReceiveNats(ms, numWorkers, ctx)` when `Keys.Subscriptions != nil`. Find and read `ReceiveNats` (likely in `pkg/metricstore/lineprotocol.go` or similar). How does it subscribe to NATS? What nats client does it use? When the global nats client is `Close()`d while `ReceiveNats` is still running (before metricstore ctx is cancelled), what happens? Can the message handler call `SendWALMessage` or `Write` on a store mid-shutdown? Is there a panic risk (send on closed channel) or use of a closed nats connection?\n\n2. `internal/api/nats.go` — `NatsAPI.StartSubscriptions()` (started in server.go init). Same questions: what happens to these subscriptions when the nats client is closed at the start of Server.Shutdown? Are subscriptions drained/unsubscribed cleanly?\n\n3. In `pkg/metricstore/metricstore.go`, examine `Shutdown()`: the `shutdownFunc` global and `shutdownFuncMu`. Can `Shutdown()` be called twice safely? Can it be called if Init was never completed (shutdownFunc nil)? What if `GetMemoryStore()` returns nil?\n\n4. The ordering: nats closed -> http stopped -> metricstore.Shutdown cancels its ctx. Between nats.Close() and metricstore ctx cancellation, is there a window where the metricstore NATS subscription goroutine errors out, logs spam, or loses in-flight metric writes (not yet checkpointed)? \n\nQuote relevant code with file:line. Only report verifiable issues with evidence. Do not propose fixes — identify and explain with evidence."},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":131,"cache_creation_input_tokens":20251,"cache_read_input_tokens":100490,"output_tokens":5600,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":20251,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":131,"output_tokens":5600,"cache_read_input_tokens":100490,"cache_creation_input_tokens":20251,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":20251},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011Cbjhti4XZc7SLqo9YD6LV","type":"assistant","uuid":"e6f03c70-17b8-4fe1-991a-195fb70ca8ee","timestamp":"2026-06-05T07:19:48.389Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"e6f03c70-17b8-4fe1-991a-195fb70ca8ee","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_012jMLKk3S7ebUtARrGaquc1","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01Sf9SNfrEftw6TrJQAaS6Ya","name":"Agent","input":{"description":"Review db/auth/config init","subagent_type":"Explore","prompt":"I'm doing a code review of the cc-backend Go project (ClusterCockpit) focused on CRITICAL and SEVERE issues in initialization and startup ordering. Report exact code with file:line references.\n\nInvestigate the initialization of these subsystems as called from `cmd/cc-backend/main.go` `run()`:\n\n1. `internal/config` `Init(cfg)` — does it panic/fatal on bad config? Are `config.Keys` safe to read after? Any global mutable state with concurrent access?\n\n2. `internal/repository` `Connect(dbPath)` and `SetConfig`, `GetConnection`, `GetJobRepository`, `GetUserRepository`. Is `Connect` a `sync.Once` singleton? What happens if `GetJobRepository()` / `GetUserRepository()` is called before `Connect()`? (In main.go, `handleUserCommands` calls `GetUserRepository()` — verify Connect ran first.) Does Connect call cclog.Fatal on error (aborting process)? Any nil-deref risk if connection failed?\n\n3. `internal/auth` `Init(cfg)` — singleton? What happens if `GetAuthInstance()` is called when Init was never called (e.g., when `config.Keys.DisableAuthentication` is true, auth.Init is skipped in main.go handleUserCommands, but server.go init calls `auth.GetAuthInstance()` unconditionally)? Trace whether GetAuthInstance can return nil and whether that nil is dereferenced in server.go.\n\n4. In `main.go`, note that when `DisableAuthentication` is true, `auth.Init` is NEVER called (it's inside the `if !config.Keys.DisableAuthentication` block in handleUserCommands). But `server.go` `init()` calls `authHandle := auth.GetAuthInstance()` unconditionally at the top, and later uses `authHandle` only inside `if !config.Keys.DisableAuthentication` guards. Verify: does `auth.GetAuthInstance()` return nil safely in that case, or does it log/panic? Is `auth.Keys.OpenIDConfig` accessed (server.go line ~189) when auth was never initialized — would that be a nil/zero-value access?\n\n5. Check `repository.Connect` ordering vs `handleDatabaseCommands` (migrate/revert/force) which run BEFORE `initDatabase()` in main.go run(). Do the migrate commands open their own DB connection, or rely on Connect? Is there a double-open or lock issue?\n\nQuote relevant code with file:line. Only report verifiable issues with evidence. Do not propose fixes — identify and explain with evidence."},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":131,"cache_creation_input_tokens":20251,"cache_read_input_tokens":100490,"output_tokens":5600,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":20251,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":131,"output_tokens":5600,"cache_read_input_tokens":100490,"cache_creation_input_tokens":20251,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":20251},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011Cbjhti4XZc7SLqo9YD6LV","type":"assistant","uuid":"984fa08e-dd63-448f-ba1c-c78b1047b9ce","timestamp":"2026-06-05T07:19:59.538Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"e6f03c70-17b8-4fe1-991a-195fb70ca8ee","isSidechain":false,"promptId":"e03eec5c-111d-4cd6-a2ad-e4499d1dc6b1","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01P4SPRdvPhwADVSfWxufJUB","type":"tool_result","content":[{"type":"text","text":"Perfect. Now I have all the information I need. Let me compile the comprehensive security/stability review with exact file:line references and code quotes.\n\n## CRITICAL CODE REVIEW: NATS Client & Metricstore Shutdown Race Conditions\n\nI have identified multiple **CRITICAL** and **SEVERE** issues in the shutdown sequence involving NATS client closure and metricstore/API operations. These are not mere logging issues—they represent **data loss**, **panic risks**, and **resource leaks** under load.\n\n---\n\n### ISSUE 1: SUBSCRIPTION CALLBACKS ACTIVE DURING NATS CONNECTION CLOSE\n\n**Severity:** CRITICAL\n\n**Problem:** When `nats.GetClient().Close()` is called in `Server.Shutdown()` (line 461, cmd/cc-backend/server.go), the NATS subscription callbacks are **still executing**. This creates a race condition where the NATS client connection is closed while callbacks are in flight.\n\n**Evidence:**\n\n1. **Line 459-462, cmd/cc-backend/server.go:**\n```go\nnc := nats.GetClient()\nif nc != nil {\n    nc.Close()  // <-- NATS connection closes HERE\n}\n```\n\n2. **ReceiveNats subscriptions still active** (lines 77, 84, pkg/metricstore/lineprotocol.go):\n```go\nnc.Subscribe(sc.SubscribeTo, func(subject string, data []byte) {\n    select {\n    case msgs <- data:\n    case <-ctx.Done():\n    }\n})\n```\n\n3. **Context not cancelled until later** (lines 279-281, pkg/metricstore/metricstore.go):\n```go\nif shutdownFunc != nil {\n    shutdownFunc()  // <-- Context cancelled AFTER nats.Close()\n}\n```\n\n**Timeline:**\n```\n1. nats.Close() called (line 461, server.go) — closes TCP connection\n2. NATS subscription callbacks are executing (could be in DecodeLine)\n3. 60+ ms later: HTTP server shuts down (lines 465-471)\n4. Much later: metricstore.Shutdown() calls shutdownFunc() (line 280)\n   — this cancels ctx that ReceiveNats is waiting on\n```\n\n**Consequence:** Between `nats.Close()` and `shutdownFunc()`, in-flight NATS subscription callbacks in `ReceiveNats` (lines 77-82) or `NatsAPI.StartSubscriptions` (lines 142-152) may experience:\n- Callbacks attempting to send to closed NATS connection internals\n- Panics if the NATS library tries to access freed memory\n- Unpredictable error handling in callback contexts\n\n---\n\n### ISSUE 2: NATSAPI WORKER GOROUTINES LEAK ON SHUTDOWN\n\n**Severity:** CRITICAL\n\n**Problem:** The `NatsAPI` instantiated in `server.go:330-333` creates persistent worker goroutines that are **never stopped** during shutdown.\n\n**Evidence:**\n\n1. **Lines 105-110, internal/api/nats.go - NatsAPI created with persistent workers:**\n```go\napi := &NatsAPI{\n    JobRepository: repository.GetJobRepository(),\n    jobCh:         make(chan natsMessage, jobConc),  // buffered channel\n    nodeCh:        make(chan natsMessage, nodeConc),  // buffered channel\n}\n\n// Start worker goroutines\nfor range jobConc {\n    go api.jobWorker()  // <-- Spins forever\n}\nfor range nodeConc {\n    go api.nodeWorker()  // <-- Spins forever\n}\n```\n\n2. **Lines 116-127, internal/api/nats.go - Workers block on channel receive:**\n```go\nfunc (api *NatsAPI) jobWorker() {\n    for msg := range api.jobCh {  // <-- Blocks forever on closed channel\n        api.handleJobEvent(msg.subject, msg.data)\n    }\n}\n\nfunc (api *NatsAPI) nodeWorker() {\n    for msg := range api.nodeCh {  // <-- Blocks forever on closed channel\n        api.handleNodeState(msg.subject, msg.data)\n    }\n}\n```\n\n3. **server.go creates NatsAPI but never closes it:**\n```go\nif config.Keys.APISubjects != nil {\n    s.natsAPIHandle = api.NewNatsAPI()  // <-- Created\n    if err := s.natsAPIHandle.StartSubscriptions(); err != nil {\n        return fmt.Errorf(\"starting NATS subscriptions: %w\", err)\n    }\n}\n// NO CLEANUP during shutdown\n```\n\n**Consequence:**\n- **8 job workers + 2 node workers = 10 goroutine leaks per restart cycle**\n- Channels `api.jobCh` and `api.nodeCh` are **never closed**, so workers block forever on channel receive\n- No graceful shutdown, no cleanup of buffered messages in the channels\n- Long-lived processes will accumulate thousands of leaked goroutines over days/weeks\n\n---\n\n### ISSUE 3: METRICSTORE CONTEXT CANCELLED WHILE DECODELINE IN FLIGHT\n\n**Severity:** SEVERE\n\n**Problem:** The metricstore context is cancelled in `Shutdown()` (line 280) **before** ensuring `ReceiveNats` goroutine has fully exited. This creates a race where `DecodeLine` is in the middle of writing to the store while the context cancels.\n\n**Evidence:**\n\n1. **Lines 187-193, pkg/metricstore/metricstore.go - ReceiveNats goroutine spawned:**\n```go\nif Keys.Subscriptions != nil {\n    wg.Go(func() {\n        if err := ReceiveNats(ms, Keys.NumWorkers, ctx); err != nil {\n            cclog.Fatal(err)\n        }\n    })\n}\n```\n\n2. **Lines 279-282, pkg/metricstore/metricstore.go - Context cancelled:**\n```go\nshutdownFuncMu.Lock()\nif shutdownFunc != nil {\n    shutdownFunc()  // <-- Cancels ctx immediately\n}\ncclog.Infof(\"[METRICSTORE]> Background workers cancelled...\")\n```\n\n3. **No synchronous wait for ReceiveNats to exit before proceeding:**\nThe `wg.Go()` adds to the WaitGroup, but there's **no `wg.Wait()` after `shutdownFunc()`**. The function proceeds immediately to checkpoint writing (line 299) without waiting for ReceiveNats to flush and exit.\n\n**Consequence:**\n- `DecodeLine` at lines 395-398 (ms.WriteToLevel) can race with metricstore state cleanup\n- In-flight metrics between context cancellation and actual goroutine exit may not be checkpointed\n- If `WriteToLevel` holds the Level lock when context is cancelled, callbacks still executing could deadlock\n\n---\n\n### ISSUE 4: WAL MESSAGE LOSS WINDOW DURING SHUTDOWN\n\n**Severity:** SEVERE\n\n**Problem:** The shutdown sequence has a **100ms grace period** (line 289) before closing WAL channels, but this is insufficient when `DecodeLine` calls are concurrent.\n\n**Evidence:**\n\n1. **Lines 284-296, pkg/metricstore/metricstore.go:**\n```go\nif Keys.Checkpoints.FileFormat == \"wal\" {\n    // Signal producers to stop sending before closing channels,\n    // preventing send-on-closed-channel panics from in-flight NATS workers.\n    walShuttingDown.Store(true)\n    // Brief grace period for in-flight DecodeLine calls to complete.\n    time.Sleep(100 * time.Millisecond)  // <-- ONLY 100ms!\n\n    for _, ch := range walShardChs {\n        close(ch)\n    }\n    drainStart := time.Now()\n    WaitForWALStagingDrain()\n```\n\n2. **Lines 386-393, pkg/metricstore/lineprotocol.go - SendWALMessage can race:**\n```go\nif !SendWALMessage(msg) {\n    // WAL shard channel full — metric is written to memory store but not WAL.\n    // Next binary snapshot will capture it.\n    if dropped := walDropped.Add(1); dropped%10000 == 1 {\n        cclog.Warnf(\"[METRICSTORE]> WAL shard channel full, dropped %d messages...\")\n    }\n}\n```\n\n3. **The comment on line 288-289 acknowledges the issue but does nothing to fix it:**\nThe grace period of 100ms is **hardcoded** and provides no guarantee. Under high load with many workers, `DecodeLine` calls from NATS callbacks can easily take >100ms to complete, especially if they hit slow disk I/O for previous checkpoints.\n\n**Race window:**\n```\n1. walShuttingDown.Store(true) [line 287]\n2. sleep(100ms) [line 289]\n3. In-flight DecodeLine may call SendWALMessage() at line 386\n4. SendWALMessage checks walShuttingDown.Load() [line 151]\n5. If called AFTER 100ms but BEFORE channels close, message is dropped silently\n6. Later CheckWALMessages dropped % 10000 == 1, so batch losses are not logged\n```\n\n**Consequence:**\n- Metrics in flight are silently dropped (not written to WAL)\n- The comment claims \"data safe in memory\" but the binary checkpoint hasn't been written yet\n- If crash occurs between lines 289 and 312 (before checkpoint written), loss is undetected\n\n---\n\n### ISSUE 5: DOUBLE SHUTDOWN VULNERABILITY IN METRICSTORE.SHUTDOWN()\n\n**Severity:** MEDIUM\n\n**Problem:** `Shutdown()` has minimal protection against being called twice, which could happen if multiple goroutines trigger shutdown concurrently.\n\n**Evidence:**\n\n1. **Lines 274-281, pkg/metricstore/metricstore.go:**\n```go\nfunc Shutdown() {\n    totalStart := time.Now()\n\n    shutdownFuncMu.Lock()\n    defer shutdownFuncMu.Unlock()\n    if shutdownFunc != nil {\n        shutdownFunc()  // <-- Calls context.CancelFunc\n        // NO nil assignment here, so second call would call cancelled context again\n    }\n```\n\n2. **After first call, `shutdownFunc` is NOT set to nil**, so if `Shutdown()` is called again:\n   - The mutex protects the lock, but `shutdownFunc()` would be called twice\n   - Go's `context.CancelFunc` is safe to call multiple times (it's idempotent)\n   - BUT the flag `walShuttingDown.Store(true)` on line 287 would execute twice unnecessarily\n\n3. **More problematic: If `Init()` is never called** (e.g., during initialization failure):\n```go\nif metricstore.Keys.Subscriptions != nil {\n    // suppose Init fails before line 187\n}\n// ... later ...\nmetricstore.Shutdown()  // Called when shutdownFunc is still nil\n```\nThis is safe, but it's fragile.\n\n**Consequence:**\n- Not a panic risk (Go's context is idempotent), but indicates weak defensive programming\n- In a concurrent shutdown scenario, race conditions could occur if the second call gets through the mutex check at a bad time\n\n---\n\n### ISSUE 6: NO DRAINING OF BUFFERED NATSAPI CHANNELS\n\n**Severity:** MEDIUM\n\n**Problem:** When `nats.Close()` stops delivering messages, the `NatsAPI` channels (`jobCh`, `nodeCh`) are left with potentially buffered unprocessed messages that are **never drained or logged**.\n\n**Evidence:**\n\n1. **Lines 100-101, internal/api/nats.go - Channels created with buffers:**\n```go\njobCh:         make(chan natsMessage, jobConc),\nnodeCh:        make(chan natsMessage, nodeConc),\n```\nWith default `jobConc=8` and `nodeConc=2`, these channels can hold 8 and 2 messages respectively.\n\n2. **Subscription callbacks send to these channels (lines 142-152):**\n```go\nif err := client.Subscribe(s.SubjectJobEvent, func(subject string, data []byte) {\n    api.jobCh <- natsMessage{subject: subject, data: data}  // <-- Enqueues\n}); err != nil {\n    return err\n}\n```\n\n3. **No cleanup on shutdown:**\nThere is no code that:\n- Closes the channels to signal workers to exit\n- Drains buffered messages before closing\n- Logs how many buffered messages were discarded\n\n**Consequence:**\n- Job start/stop messages in the buffer during shutdown are silently dropped\n- Worker goroutines remain blocked on channel receive indefinitely\n- Silent data loss of API events\n\n---\n\n### ISSUE 7: UNSAFE METRICSTORE GETMEMORYSTORE() AFTER SHUTDOWN\n\n**Severity:** MEDIUM (but could promote to HIGH in concurrent scenarios)\n\n**Problem:** `GetMemoryStore()` can be called after shutdown while the store's context is cancelled, leading to undefined behavior if code relies on context semantics.\n\n**Evidence:**\n\n1. **Lines 238-244, pkg/metricstore/metricstore.go:**\n```go\nfunc GetMemoryStore() *MemoryStore {\n    if msInstance == nil {\n        cclog.Warnf(\"[METRICSTORE]> MemoryStore not initialized!\")\n    }\n    return msInstance  // <-- Returns even if nil, even after shutdown\n}\n```\n\n2. **Line 304, pkg/metricstore/metricstore.go - Called during shutdown:**\n```go\nms := GetMemoryStore()  // <-- Could be nil or in shutdown state\n```\n\n3. **In server.go:482, also called during shutdown:**\n```go\nif ms := metricstore.GetMemoryStore(); ms != nil {\n    wg.Go(func() {\n        metricstore.Shutdown()\n    })\n}\n```\n\n**Consequence:**\n- If `GetMemoryStore()` returns nil (initialization failed), the nil check at server.go:482 prevents the panic, but there's no logging of this condition\n- More subtly: calls to `ms.Write()` or `ms.WriteToLevel()` after shutdown could execute on a valid pointer but with a cancelled context, leading to undefined semantics\n\n---\n\n### ISSUE 8: INCOMING NATS MESSAGES AFTER NCCLOSE - BEHAVIOR UNDEFINED\n\n**Severity:** SEVERE\n\n**Problem:** The NATS client's internal state after `nc.Close()` is implementation-dependent. If any subscription callbacks are queued for execution, they could panic or access freed memory.\n\n**Evidence:**\n\n1. **Lines 459-463, cmd/cc-backend/server.go:**\n```go\nnc := nats.GetClient()\nif nc != nil {\n    nc.Close()  // <-- Synchronously closes connection\n}\ncclog.Infof(\"Shutdown: NATS closed (%v)\", time.Since(natsStart))\n```\n\n2. **The NATS library (cc-lib/v2/nats) callback mechanism is not examined here, but typical NATS client behavior:**\n   - Subscription callbacks are executed asynchronously by internal NATS goroutines\n   - Closing the connection does NOT guarantee all pending callbacks have been executed\n   - Some NATS libraries queue callbacks and execute them on a background goroutine\n\n3. **Example of how a race could manifest** (from DecodeLine):\n```go\n// In a NATS callback (lines 77-82, lineprotocol.go):\nnc.Subscribe(sc.SubscribeTo, func(subject string, data []byte) {\n    select {\n    case msgs <- data:  // <-- This goroutine is executing\n    case <-ctx.Done():\n    }\n})\n\n// Meanwhile in server.go:\nnc.Close()  // <-- Closes connection before callback finishes\n\n// If the NATS library accesses connection state after Close():\n// PANIC: access to freed/nil connection pointer\n```\n\n**Consequence:**\n- Undefined behavior in the NATS library's callback execution context\n- Potential panics in NATS library code (not in cc-backend, but triggered by it)\n- No graceful degradation\n\n---\n\n### SUMMARY TABLE\n\n| Issue | File:Line | Type | Severity | Problem |\n|-------|-----------|------|----------|---------|\n| 1 | server.go:459-461, metricstore.go:279-281 | Race | CRITICAL | NATS closed before subscriptions drained |\n| 2 | nats.go:105-127, server.go:330-333 | Leak | CRITICAL | NatsAPI workers never stopped, channels never closed |\n| 3 | metricstore.go:187-193, 279-282 | Race | SEVERE | Context cancelled without waiting for ReceiveNats |\n| 4 | metricstore.go:289, lineprotocol.go:386-393 | Loss | SEVERE | 100ms grace insufficient for concurrent DecodeLine |\n| 5 | metricstore.go:274-281 | Safety | MEDIUM | shutdownFunc not reset to nil after call |\n| 6 | nats.go:100-101, 142-152 | Loss | MEDIUM | Buffered API messages discarded on shutdown |\n| 7 | metricstore.go:238-244, 304 | Safety | MEDIUM | GetMemoryStore() unsafe after shutdown |\n| 8 | server.go:459-463 | Panic | SEVERE | NATS Close() doesn't drain async callbacks |\n\n---\n\n### RECOMMENDED INVESTIGATION POINTS\n\n1. **Test with high-load metric ingestion during shutdown** to trigger Issue 4 (WAL loss)\n2. **Check cc-lib/v2/nats source** to understand callback execution semantics after `Close()`\n3. **Add goroutine profiling** to confirm Issue 2 (NatsAPI worker leaks) under repeated start/stop cycles\n4. **Stress-test the 100ms grace period** (Issue 4) with concurrent `DecodeLine` calls from multiple workers\n5. **Verify if messages are ever lost** between `nats.Close()` and the final binary checkpoint write"}]}]},"uuid":"623c97ba-1ada-4d18-8449-530d82010969","timestamp":"2026-06-05T07:21:03.765Z","toolUseResult":{"status":"completed","prompt":"I'm doing a code review of the cc-backend Go project (ClusterCockpit) focused on CRITICAL and SEVERE issues in initialization, startup, and shutdown.\n\nFocus on the interaction between the NATS client and the metricstore's NATS metric ingestion during startup and shutdown. Report exact code with file:line references.\n\nContext: In `cmd/cc-backend/main.go`, `nats.Init()` + `nats.Connect()` happen early. In `cmd/cc-backend/server.go` `Server.Shutdown()`, `nats.GetClient().Close()` is called FIRST, then HTTP server shutdown, then `metricstore.Shutdown()` runs concurrently with `archiver.Shutdown()`.\n\nInvestigate:\n1. `pkg/metricstore/metricstore.go` `Init()` starts a goroutine `ReceiveNats(ms, numWorkers, ctx)` when `Keys.Subscriptions != nil`. Find and read `ReceiveNats` (likely in `pkg/metricstore/lineprotocol.go` or similar). How does it subscribe to NATS? What nats client does it use? When the global nats client is `Close()`d while `ReceiveNats` is still running (before metricstore ctx is cancelled), what happens? Can the message handler call `SendWALMessage` or `Write` on a store mid-shutdown? Is there a panic risk (send on closed channel) or use of a closed nats connection?\n\n2. `internal/api/nats.go` — `NatsAPI.StartSubscriptions()` (started in server.go init). Same questions: what happens to these subscriptions when the nats client is closed at the start of Server.Shutdown? Are subscriptions drained/unsubscribed cleanly?\n\n3. In `pkg/metricstore/metricstore.go`, examine `Shutdown()`: the `shutdownFunc` global and `shutdownFuncMu`. Can `Shutdown()` be called twice safely? Can it be called if Init was never completed (shutdownFunc nil)? What if `GetMemoryStore()` returns nil?\n\n4. The ordering: nats closed -> http stopped -> metricstore.Shutdown cancels its ctx. Between nats.Close() and metricstore ctx cancellation, is there a window where the metricstore NATS subscription goroutine errors out, logs spam, or loses in-flight metric writes (not yet checkpointed)? \n\nQuote relevant code with file:line. Only report verifiable issues with evidence. Do not propose fixes — identify and explain with evidence.","agentId":"a78e5867ba2277f43","agentType":"Explore","content":[{"type":"text","text":"Perfect. Now I have all the information I need. Let me compile the comprehensive security/stability review with exact file:line references and code quotes.\n\n## CRITICAL CODE REVIEW: NATS Client & Metricstore Shutdown Race Conditions\n\nI have identified multiple **CRITICAL** and **SEVERE** issues in the shutdown sequence involving NATS client closure and metricstore/API operations. These are not mere logging issues—they represent **data loss**, **panic risks**, and **resource leaks** under load.\n\n---\n\n### ISSUE 1: SUBSCRIPTION CALLBACKS ACTIVE DURING NATS CONNECTION CLOSE\n\n**Severity:** CRITICAL\n\n**Problem:** When `nats.GetClient().Close()` is called in `Server.Shutdown()` (line 461, cmd/cc-backend/server.go), the NATS subscription callbacks are **still executing**. This creates a race condition where the NATS client connection is closed while callbacks are in flight.\n\n**Evidence:**\n\n1. **Line 459-462, cmd/cc-backend/server.go:**\n```go\nnc := nats.GetClient()\nif nc != nil {\n    nc.Close()  // <-- NATS connection closes HERE\n}\n```\n\n2. **ReceiveNats subscriptions still active** (lines 77, 84, pkg/metricstore/lineprotocol.go):\n```go\nnc.Subscribe(sc.SubscribeTo, func(subject string, data []byte) {\n    select {\n    case msgs <- data:\n    case <-ctx.Done():\n    }\n})\n```\n\n3. **Context not cancelled until later** (lines 279-281, pkg/metricstore/metricstore.go):\n```go\nif shutdownFunc != nil {\n    shutdownFunc()  // <-- Context cancelled AFTER nats.Close()\n}\n```\n\n**Timeline:**\n```\n1. nats.Close() called (line 461, server.go) — closes TCP connection\n2. NATS subscription callbacks are executing (could be in DecodeLine)\n3. 60+ ms later: HTTP server shuts down (lines 465-471)\n4. Much later: metricstore.Shutdown() calls shutdownFunc() (line 280)\n   — this cancels ctx that ReceiveNats is waiting on\n```\n\n**Consequence:** Between `nats.Close()` and `shutdownFunc()`, in-flight NATS subscription callbacks in `ReceiveNats` (lines 77-82) or `NatsAPI.StartSubscriptions` (lines 142-152) may experience:\n- Callbacks attempting to send to closed NATS connection internals\n- Panics if the NATS library tries to access freed memory\n- Unpredictable error handling in callback contexts\n\n---\n\n### ISSUE 2: NATSAPI WORKER GOROUTINES LEAK ON SHUTDOWN\n\n**Severity:** CRITICAL\n\n**Problem:** The `NatsAPI` instantiated in `server.go:330-333` creates persistent worker goroutines that are **never stopped** during shutdown.\n\n**Evidence:**\n\n1. **Lines 105-110, internal/api/nats.go - NatsAPI created with persistent workers:**\n```go\napi := &NatsAPI{\n    JobRepository: repository.GetJobRepository(),\n    jobCh:         make(chan natsMessage, jobConc),  // buffered channel\n    nodeCh:        make(chan natsMessage, nodeConc),  // buffered channel\n}\n\n// Start worker goroutines\nfor range jobConc {\n    go api.jobWorker()  // <-- Spins forever\n}\nfor range nodeConc {\n    go api.nodeWorker()  // <-- Spins forever\n}\n```\n\n2. **Lines 116-127, internal/api/nats.go - Workers block on channel receive:**\n```go\nfunc (api *NatsAPI) jobWorker() {\n    for msg := range api.jobCh {  // <-- Blocks forever on closed channel\n        api.handleJobEvent(msg.subject, msg.data)\n    }\n}\n\nfunc (api *NatsAPI) nodeWorker() {\n    for msg := range api.nodeCh {  // <-- Blocks forever on closed channel\n        api.handleNodeState(msg.subject, msg.data)\n    }\n}\n```\n\n3. **server.go creates NatsAPI but never closes it:**\n```go\nif config.Keys.APISubjects != nil {\n    s.natsAPIHandle = api.NewNatsAPI()  // <-- Created\n    if err := s.natsAPIHandle.StartSubscriptions(); err != nil {\n        return fmt.Errorf(\"starting NATS subscriptions: %w\", err)\n    }\n}\n// NO CLEANUP during shutdown\n```\n\n**Consequence:**\n- **8 job workers + 2 node workers = 10 goroutine leaks per restart cycle**\n- Channels `api.jobCh` and `api.nodeCh` are **never closed**, so workers block forever on channel receive\n- No graceful shutdown, no cleanup of buffered messages in the channels\n- Long-lived processes will accumulate thousands of leaked goroutines over days/weeks\n\n---\n\n### ISSUE 3: METRICSTORE CONTEXT CANCELLED WHILE DECODELINE IN FLIGHT\n\n**Severity:** SEVERE\n\n**Problem:** The metricstore context is cancelled in `Shutdown()` (line 280) **before** ensuring `ReceiveNats` goroutine has fully exited. This creates a race where `DecodeLine` is in the middle of writing to the store while the context cancels.\n\n**Evidence:**\n\n1. **Lines 187-193, pkg/metricstore/metricstore.go - ReceiveNats goroutine spawned:**\n```go\nif Keys.Subscriptions != nil {\n    wg.Go(func() {\n        if err := ReceiveNats(ms, Keys.NumWorkers, ctx); err != nil {\n            cclog.Fatal(err)\n        }\n    })\n}\n```\n\n2. **Lines 279-282, pkg/metricstore/metricstore.go - Context cancelled:**\n```go\nshutdownFuncMu.Lock()\nif shutdownFunc != nil {\n    shutdownFunc()  // <-- Cancels ctx immediately\n}\ncclog.Infof(\"[METRICSTORE]> Background workers cancelled...\")\n```\n\n3. **No synchronous wait for ReceiveNats to exit before proceeding:**\nThe `wg.Go()` adds to the WaitGroup, but there's **no `wg.Wait()` after `shutdownFunc()`**. The function proceeds immediately to checkpoint writing (line 299) without waiting for ReceiveNats to flush and exit.\n\n**Consequence:**\n- `DecodeLine` at lines 395-398 (ms.WriteToLevel) can race with metricstore state cleanup\n- In-flight metrics between context cancellation and actual goroutine exit may not be checkpointed\n- If `WriteToLevel` holds the Level lock when context is cancelled, callbacks still executing could deadlock\n\n---\n\n### ISSUE 4: WAL MESSAGE LOSS WINDOW DURING SHUTDOWN\n\n**Severity:** SEVERE\n\n**Problem:** The shutdown sequence has a **100ms grace period** (line 289) before closing WAL channels, but this is insufficient when `DecodeLine` calls are concurrent.\n\n**Evidence:**\n\n1. **Lines 284-296, pkg/metricstore/metricstore.go:**\n```go\nif Keys.Checkpoints.FileFormat == \"wal\" {\n    // Signal producers to stop sending before closing channels,\n    // preventing send-on-closed-channel panics from in-flight NATS workers.\n    walShuttingDown.Store(true)\n    // Brief grace period for in-flight DecodeLine calls to complete.\n    time.Sleep(100 * time.Millisecond)  // <-- ONLY 100ms!\n\n    for _, ch := range walShardChs {\n        close(ch)\n    }\n    drainStart := time.Now()\n    WaitForWALStagingDrain()\n```\n\n2. **Lines 386-393, pkg/metricstore/lineprotocol.go - SendWALMessage can race:**\n```go\nif !SendWALMessage(msg) {\n    // WAL shard channel full — metric is written to memory store but not WAL.\n    // Next binary snapshot will capture it.\n    if dropped := walDropped.Add(1); dropped%10000 == 1 {\n        cclog.Warnf(\"[METRICSTORE]> WAL shard channel full, dropped %d messages...\")\n    }\n}\n```\n\n3. **The comment on line 288-289 acknowledges the issue but does nothing to fix it:**\nThe grace period of 100ms is **hardcoded** and provides no guarantee. Under high load with many workers, `DecodeLine` calls from NATS callbacks can easily take >100ms to complete, especially if they hit slow disk I/O for previous checkpoints.\n\n**Race window:**\n```\n1. walShuttingDown.Store(true) [line 287]\n2. sleep(100ms) [line 289]\n3. In-flight DecodeLine may call SendWALMessage() at line 386\n4. SendWALMessage checks walShuttingDown.Load() [line 151]\n5. If called AFTER 100ms but BEFORE channels close, message is dropped silently\n6. Later CheckWALMessages dropped % 10000 == 1, so batch losses are not logged\n```\n\n**Consequence:**\n- Metrics in flight are silently dropped (not written to WAL)\n- The comment claims \"data safe in memory\" but the binary checkpoint hasn't been written yet\n- If crash occurs between lines 289 and 312 (before checkpoint written), loss is undetected\n\n---\n\n### ISSUE 5: DOUBLE SHUTDOWN VULNERABILITY IN METRICSTORE.SHUTDOWN()\n\n**Severity:** MEDIUM\n\n**Problem:** `Shutdown()` has minimal protection against being called twice, which could happen if multiple goroutines trigger shutdown concurrently.\n\n**Evidence:**\n\n1. **Lines 274-281, pkg/metricstore/metricstore.go:**\n```go\nfunc Shutdown() {\n    totalStart := time.Now()\n\n    shutdownFuncMu.Lock()\n    defer shutdownFuncMu.Unlock()\n    if shutdownFunc != nil {\n        shutdownFunc()  // <-- Calls context.CancelFunc\n        // NO nil assignment here, so second call would call cancelled context again\n    }\n```\n\n2. **After first call, `shutdownFunc` is NOT set to nil**, so if `Shutdown()` is called again:\n   - The mutex protects the lock, but `shutdownFunc()` would be called twice\n   - Go's `context.CancelFunc` is safe to call multiple times (it's idempotent)\n   - BUT the flag `walShuttingDown.Store(true)` on line 287 would execute twice unnecessarily\n\n3. **More problematic: If `Init()` is never called** (e.g., during initialization failure):\n```go\nif metricstore.Keys.Subscriptions != nil {\n    // suppose Init fails before line 187\n}\n// ... later ...\nmetricstore.Shutdown()  // Called when shutdownFunc is still nil\n```\nThis is safe, but it's fragile.\n\n**Consequence:**\n- Not a panic risk (Go's context is idempotent), but indicates weak defensive programming\n- In a concurrent shutdown scenario, race conditions could occur if the second call gets through the mutex check at a bad time\n\n---\n\n### ISSUE 6: NO DRAINING OF BUFFERED NATSAPI CHANNELS\n\n**Severity:** MEDIUM\n\n**Problem:** When `nats.Close()` stops delivering messages, the `NatsAPI` channels (`jobCh`, `nodeCh`) are left with potentially buffered unprocessed messages that are **never drained or logged**.\n\n**Evidence:**\n\n1. **Lines 100-101, internal/api/nats.go - Channels created with buffers:**\n```go\njobCh:         make(chan natsMessage, jobConc),\nnodeCh:        make(chan natsMessage, nodeConc),\n```\nWith default `jobConc=8` and `nodeConc=2`, these channels can hold 8 and 2 messages respectively.\n\n2. **Subscription callbacks send to these channels (lines 142-152):**\n```go\nif err := client.Subscribe(s.SubjectJobEvent, func(subject string, data []byte) {\n    api.jobCh <- natsMessage{subject: subject, data: data}  // <-- Enqueues\n}); err != nil {\n    return err\n}\n```\n\n3. **No cleanup on shutdown:**\nThere is no code that:\n- Closes the channels to signal workers to exit\n- Drains buffered messages before closing\n- Logs how many buffered messages were discarded\n\n**Consequence:**\n- Job start/stop messages in the buffer during shutdown are silently dropped\n- Worker goroutines remain blocked on channel receive indefinitely\n- Silent data loss of API events\n\n---\n\n### ISSUE 7: UNSAFE METRICSTORE GETMEMORYSTORE() AFTER SHUTDOWN\n\n**Severity:** MEDIUM (but could promote to HIGH in concurrent scenarios)\n\n**Problem:** `GetMemoryStore()` can be called after shutdown while the store's context is cancelled, leading to undefined behavior if code relies on context semantics.\n\n**Evidence:**\n\n1. **Lines 238-244, pkg/metricstore/metricstore.go:**\n```go\nfunc GetMemoryStore() *MemoryStore {\n    if msInstance == nil {\n        cclog.Warnf(\"[METRICSTORE]> MemoryStore not initialized!\")\n    }\n    return msInstance  // <-- Returns even if nil, even after shutdown\n}\n```\n\n2. **Line 304, pkg/metricstore/metricstore.go - Called during shutdown:**\n```go\nms := GetMemoryStore()  // <-- Could be nil or in shutdown state\n```\n\n3. **In server.go:482, also called during shutdown:**\n```go\nif ms := metricstore.GetMemoryStore(); ms != nil {\n    wg.Go(func() {\n        metricstore.Shutdown()\n    })\n}\n```\n\n**Consequence:**\n- If `GetMemoryStore()` returns nil (initialization failed), the nil check at server.go:482 prevents the panic, but there's no logging of this condition\n- More subtly: calls to `ms.Write()` or `ms.WriteToLevel()` after shutdown could execute on a valid pointer but with a cancelled context, leading to undefined semantics\n\n---\n\n### ISSUE 8: INCOMING NATS MESSAGES AFTER NCCLOSE - BEHAVIOR UNDEFINED\n\n**Severity:** SEVERE\n\n**Problem:** The NATS client's internal state after `nc.Close()` is implementation-dependent. If any subscription callbacks are queued for execution, they could panic or access freed memory.\n\n**Evidence:**\n\n1. **Lines 459-463, cmd/cc-backend/server.go:**\n```go\nnc := nats.GetClient()\nif nc != nil {\n    nc.Close()  // <-- Synchronously closes connection\n}\ncclog.Infof(\"Shutdown: NATS closed (%v)\", time.Since(natsStart))\n```\n\n2. **The NATS library (cc-lib/v2/nats) callback mechanism is not examined here, but typical NATS client behavior:**\n   - Subscription callbacks are executed asynchronously by internal NATS goroutines\n   - Closing the connection does NOT guarantee all pending callbacks have been executed\n   - Some NATS libraries queue callbacks and execute them on a background goroutine\n\n3. **Example of how a race could manifest** (from DecodeLine):\n```go\n// In a NATS callback (lines 77-82, lineprotocol.go):\nnc.Subscribe(sc.SubscribeTo, func(subject string, data []byte) {\n    select {\n    case msgs <- data:  // <-- This goroutine is executing\n    case <-ctx.Done():\n    }\n})\n\n// Meanwhile in server.go:\nnc.Close()  // <-- Closes connection before callback finishes\n\n// If the NATS library accesses connection state after Close():\n// PANIC: access to freed/nil connection pointer\n```\n\n**Consequence:**\n- Undefined behavior in the NATS library's callback execution context\n- Potential panics in NATS library code (not in cc-backend, but triggered by it)\n- No graceful degradation\n\n---\n\n### SUMMARY TABLE\n\n| Issue | File:Line | Type | Severity | Problem |\n|-------|-----------|------|----------|---------|\n| 1 | server.go:459-461, metricstore.go:279-281 | Race | CRITICAL | NATS closed before subscriptions drained |\n| 2 | nats.go:105-127, server.go:330-333 | Leak | CRITICAL | NatsAPI workers never stopped, channels never closed |\n| 3 | metricstore.go:187-193, 279-282 | Race | SEVERE | Context cancelled without waiting for ReceiveNats |\n| 4 | metricstore.go:289, lineprotocol.go:386-393 | Loss | SEVERE | 100ms grace insufficient for concurrent DecodeLine |\n| 5 | metricstore.go:274-281 | Safety | MEDIUM | shutdownFunc not reset to nil after call |\n| 6 | nats.go:100-101, 142-152 | Loss | MEDIUM | Buffered API messages discarded on shutdown |\n| 7 | metricstore.go:238-244, 304 | Safety | MEDIUM | GetMemoryStore() unsafe after shutdown |\n| 8 | server.go:459-463 | Panic | SEVERE | NATS Close() doesn't drain async callbacks |\n\n---\n\n### RECOMMENDED INVESTIGATION POINTS\n\n1. **Test with high-load metric ingestion during shutdown** to trigger Issue 4 (WAL loss)\n2. **Check cc-lib/v2/nats source** to understand callback execution semantics after `Close()`\n3. **Add goroutine profiling** to confirm Issue 2 (NatsAPI worker leaks) under repeated start/stop cycles\n4. **Stress-test the 100ms grace period** (Issue 4) with concurrent `DecodeLine` calls from multiple workers\n5. **Verify if messages are ever lost** between `nats.Close()` and the final binary checkpoint write"}],"totalDurationMs":74694,"totalTokens":62270,"totalToolUseCount":24,"usage":{"input_tokens":0,"cache_creation_input_tokens":249,"cache_read_input_tokens":57596,"output_tokens":4425,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":0,"ephemeral_5m_input_tokens":249},"inference_geo":"not_available","iterations":[{"input_tokens":0,"output_tokens":4425,"cache_read_input_tokens":57596,"cache_creation_input_tokens":249,"cache_creation":{"ephemeral_5m_input_tokens":249,"ephemeral_1h_input_tokens":0},"type":"message"}],"speed":"standard"},"toolStats":{"readCount":14,"searchCount":0,"bashCount":10,"editFileCount":0,"linesAdded":0,"linesRemoved":0,"otherToolCount":0}},"sourceToolAssistantUUID":"e6f03c70-17b8-4fe1-991a-195fb70ca8ee","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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Here are the findings with exact code references:\n\n---\n\n### ISSUE 1: CRITICAL - Unconditional auth.GetAuthInstance() Call When auth.Init May Never Execute\n\n**File: `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go`, line 123**\n\n```go\nauthHandle := auth.GetAuthInstance()  // Line 123\n```\n\n**Context: Main flow in `cmd/cc-backend/main.go`**\n\n- **Lines 175-181** in `handleUserCommands()`: `auth.Init()` is ONLY called when `!config.Keys.DisableAuthentication` is true\n- **Lines 530-537** in `run()`: `handleUserCommands()` executes, but may NOT initialize auth if DisableAuthentication is true\n- **Lines 386-389** in `runServer()`: Calls `NewServer()` which immediately calls `s.init()` at line 85\n- **Lines 92-123** in `server.go init()`: Line 123 calls `auth.GetAuthInstance()` UNCONDITIONALLY\n\n**The Problem:**\n\nWhen `config.Keys.DisableAuthentication == true`:\n1. `handleUserCommands()` skips the entire `if !config.Keys.DisableAuthentication` block (lines 175-211)\n2. `auth.Init()` is **NEVER** called\n3. `authInstance` remains `nil` (see `/Users/jan/prg/ClusterCockpit/cc-backend/internal/auth/auth.go` line 52: `authInstance *Authentication`)\n4. Later, `server.go` line 123 calls `auth.GetAuthInstance()`\n5. `GetAuthInstance()` checks `if authInstance == nil` and calls `cclog.Fatal()` (line 260 in auth.go):\n\n```go\nfunc GetAuthInstance() *Authentication {\n\tif authInstance == nil {\n\t\tcclog.Fatal(\"Authentication module not initialized!\")  // Line 260\n\t}\n\treturn authInstance\n}\n```\n\n**Result:** Process aborts with `Fatal` error when authentication is disabled.\n\n**Evidence:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go` lines 170-214 (handleUserCommands)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go` line 123 (unconditional call)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/auth/auth.go` lines 50-53, 258-264\n\n---\n\n### ISSUE 2: SEVERE - auth.Keys Access Before auth.Init() With DisableAuthentication\n\n**File: `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go`, line 189**\n\n```go\nif auth.Keys.OpenIDConfig != nil {  // Line 189\n    openIDConnect := auth.NewOIDC(authHandle)\n    openIDConnect.RegisterEndpoints(s.router)\n    info[\"hasOpenIDConnect\"] = true\n}\n```\n\n**The Problem:**\n\n1. `auth.Keys` is a module-level variable (line 116 in `/Users/jan/prg/ClusterCockpit/cc-backend/internal/auth/auth.go`):\n   ```go\n   var Keys AuthConfig  // Line 116\n   ```\n\n2. `auth.Keys` is ONLY populated inside `auth.Init()` (lines 204-248 in auth.go):\n   ```go\n   if authCfg == nil {\n       return  // Lines 204-206: Early return, Keys never populated\n   }\n   config.Validate(configSchema, *authCfg)\n   dec := json.NewDecoder(bytes.NewReader(*authCfg))\n   dec.DisallowUnknownFields()\n   if err := dec.Decode(&Keys); err != nil {  // Line 211: Keys populated here\n       cclog.Errorf(\"error while decoding ldap config: %v\", err)\n   }\n   ```\n\n3. When `DisableAuthentication == true`, `auth.Init()` is never called, so `auth.Keys` remains at zero value\n4. Line 189 checks `if auth.Keys.OpenIDConfig != nil` — this is safe (nil check on zero-value struct field)\n5. BUT: If OpenID config somehow exists in zero-value (which it won't, but the code assumes it doesn't), line 190 would dereference `authHandle` which is NOT nil (from line 123's fatal call or if init somehow succeeded)\n\n**Actually Safe But Fragile:** The nil-check at line 189 prevents dereferencing, BUT:\n- The entire initialization depends on `auth.GetAuthInstance()` at line 123 succeeding\n- If that call doesn't fatal, then line 190 (`NewOIDC(authHandle)`) will execute with potentially uninitialized `auth.Keys`\n\n**Evidence:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/auth/auth.go` lines 181-256 (Init function with conditional early return)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/auth/auth.go` line 116 (Keys declaration)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go` lines 189-193\n\n---\n\n### ISSUE 3: CRITICAL - Database Migration Commands Execute Before Connect()\n\n**File: `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go`, lines 507-514**\n\n```go\n// Handle database migration (migrate, revert, force)\nif err := handleDatabaseCommands(); err != nil {  // Line 507\n    return err\n}\n\n// Initialize database\nif err := initDatabase(); err != nil {  // Line 512\n    return err\n}\n```\n\n**The Problem:**\n\n1. `handleDatabaseCommands()` (lines 139-168) calls:\n   - `repository.MigrateDB(config.Keys.DB)` (line 141)\n   - `repository.RevertDB(config.Keys.DB)` (line 150)\n   - `repository.ForceDB(config.Keys.DB)` (line 159)\n\n2. These functions in `/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/migration.go` (lines 113-204):\n   ```go\n   func MigrateDB(db string) error {\n       m, err := getMigrateInstance(db)  // Line 114\n       if err != nil {\n           return err\n       }\n       // ...\n       if err := m.Up(); err != nil {  // Line 136\n   ```\n   \n   Each creates a NEW database connection via `getMigrateInstance()` which calls:\n   ```go\n   m, err = migrate.NewWithSourceInstance(\"iofs\", d, \n       fmt.Sprintf(\"sqlite3://%s?_foreign_keys=on\", db))  // Line 88\n   ```\n\n3. These migrations open THEIR OWN database connections (not using `repository.Connect()`)\n\n4. THEN `initDatabase()` (lines 111-137) calls:\n   ```go\n   repository.SetConfig(cfg)  // Line 133\n   repository.Connect(config.Keys.DB)  // Line 135\n   ```\n\n**Issue:** Multiple independent database connections open to the same SQLite file. SQLite with `_journal_mode=WAL` can handle multiple readers, but:\n- Migration might hold a write lock while `Connect()` tries to initialize\n- The `repository.Connect()` uses different SQLite pragmas (lines 39-53 in dbConnection.go) than the migration's `_foreign_keys=on` only\n- No ordering guarantees that migrations complete before Connect() proceeds\n\n**Evidence:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go` lines 139-168 (handleDatabaseCommands)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/migration.go` lines 82-94 (getMigrateInstance opens own connection)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go` lines 111-137 (initDatabase)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/dbConnection.go` lines 55-110 (Connect with different pragmas)\n\n---\n\n### ISSUE 4: CRITICAL - GetUserRepository() and GetJobRepository() Can Be Called Before Connect()\n\n**File: `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go`, line 232**\n\n```go\nur := repository.GetUserRepository()  // Called in addUser() at line 232\n```\n\n**Call Chain:**\n1. Line 531: `handleUserCommands()` is called\n2. Lines 186-189: `addUser(flagNewUser)` is called AFTER auth.Init but only if `!DisableAuthentication`\n3. Line 232 (addUser): `repository.GetUserRepository()` is called\n\n**The Problem:**\n\n`GetUserRepository()` in `/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/user.go` lines 59-69:\n\n```go\nfunc GetUserRepository() *UserRepository {\n    userRepoOnce.Do(func() {\n        db := GetConnection()  // Line 61\n        \n        userRepoInstance = &UserRepository{\n            DB:     db.DB,\n            driver: db.Driver,\n        }\n    })\n    return userRepoInstance\n}\n```\n\nIt calls `GetConnection()` (line 61) which, in `/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/dbConnection.go` lines 112-118:\n\n```go\nfunc GetConnection() *DBConnection {\n    if dbConnInstance == nil {\n        cclog.Fatalf(\"Database connection not initialized!\")  // Line 114\n    }\n    return dbConnInstance\n}\n```\n\n**Will fatal if `Connect()` was never called.**\n\nBUT: The order in `main.go run()` is:\n- Line 512: `initDatabase()` calls `repository.Connect()`\n- Line 531: `handleUserCommands()` calls `addUser()` which calls `GetUserRepository()`\n\n**Actually Safe in Current Flow** - but `handleUserCommands()` reads from user repos (lines 232, 247, 269) which depend on `Connect()` having executed at line 512.\n\n**However:** No synchronization prevents races if `Connect()` fails silently. More critically:\n\n**At line 518** (flagOptimizeDB):\n```go\ndb := repository.GetConnection()  // Line 518\n```\n\nThis is called BEFORE `handleUserCommands()`. If `initDatabase()` fails but doesn't return (e.g., returns partial error), this could call GetConnection before Connect succeeded.\n\n**Evidence:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/user.go` lines 59-69\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/dbConnection.go` lines 112-118\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go` lines 517-528 (GetConnection before handleUserCommands)\n\n---\n\n### ISSUE 5: SEVERE - Connect() Uses sync.Once Without Error Handling\n\n**File: `/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/dbConnection.go`, lines 55-110**\n\n```go\nfunc Connect(db string) {\n    var err error\n    var dbHandle *sqlx.DB\n\n    dbConnOnce.Do(func() {  // Line 59: sync.Once closure\n        // ... setup connection ...\n        if err != nil {\n            cclog.Abortf(\"DB Connection: Could not connect to SQLite database...\")  // Lines 87-88\n        }\n        // ...\n        if err != nil {\n            cclog.Abortf(\"Failed sqlite db setup...\")  // Lines 92-93\n        }\n        // ...\n        if err != nil {\n            cclog.Abortf(\"DB Connection: Failed DB version check...\")  // Lines 106-107\n        }\n    })\n}\n```\n\n**The Problem:**\n\n1. `Connect()` has NO return value - it's `func Connect(db string)` (line 55)\n2. All errors are handled via `cclog.Abortf()` which terminates the process\n3. If ANY error occurs inside the sync.Once closure, the process terminates\n4. BUT: The sync.Once ensures the function body only runs ONCE\n5. If someone calls `Connect()` twice with different `db` parameters:\n   - First call: Initializes to db1\n   - Second call: sync.Once.Do() doesn't execute, so db1 remains active\n   - No way to know this silently happened\n\n**This is not a crash scenario, but a silent failure scenario:**\n\nExample problematic code (doesn't exist but could):\n```go\nrepository.Connect(\"/path1/db.sqlite\")\nrepository.Connect(\"/path2/db.sqlite\")  // Silently ignored\n// Now using /path1/db.sqlite when expecting /path2/db.sqlite\n```\n\n**More Critical:** No way to verify Connect actually succeeded. Code at line 518 assumes it worked:\n\n```go\ndb := repository.GetConnection()  // Assumes Connect succeeded\nif _, err := db.DB.Exec(\"VACUUM\"); err != nil {  // Could be operating on wrong DB\n```\n\n**Evidence:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/dbConnection.go` lines 55-110\n- Uses `sync.Once` with no return value or error channel\n- All error handling via `cclog.Abortf()` which fatals\n\n---\n\n### ISSUE 6: Repository State Access When Connect() Calls cclog.Abort\n\n**File: `/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/dbConnection.go`, lines 88, 93, 107**\n\nWhen errors occur during `Connect()`:\n```go\ncclog.Abortf(\"DB Connection: Could not connect...\")  // Line 88\ncclog.Abortf(\"Failed sqlite db setup...\")            // Line 93\ncclog.Abortf(\"DB Connection: Failed DB version check...\")  // Line 107\n```\n\nThese are called BEFORE `dbConnInstance` is assigned (line 104):\n```go\ndbConnInstance = &DBConnection{DB: dbHandle}  // Line 104\n```\n\nIf an error occurs at lines 87-88 or 92-93, `dbConnInstance` remains `nil`.\n\nLater calls to `GetConnection()` at line 518 or 232 will fatal with \"Database connection not initialized!\"\n\n**But cclog.Abort likely terminates the process anyway**, so this is a cascading fatal scenario.\n\n**Evidence:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/dbConnection.go` lines 55-110\n- Error handling order: errors checked BEFORE dbConnInstance assignment\n\n---\n\n### ISSUE 7: Repository Repositories Never Initialized When DisableAuthentication=true\n\nWhen `DisableAuthentication == true`:\n\n1. `handleUserCommands()` returns immediately (lines 175-181)\n2. `auth.Init()` is never called\n3. BUT `server.go` line 123 REQUIRES `auth.GetAuthInstance()` to work\n4. This will fatal at that point\n\n**But if it somehow passed**, consider:\n- User repositories are lazily initialized via `sync.Once` in `GetUserRepository()`\n- If auth never initialized and user commands never run, repositories might not be initialized at all\n- Later HTTP handler access might trigger lazy init, which could fail\n\n**Likelihood:** Server crashes before handlers even load due to Issue #1.\n\n---\n\n### Summary of Severity\n\n| Issue | Severity | Impact |\n|-------|----------|--------|\n| Issue #1 | CRITICAL | Process fatal aborts when DisableAuthentication=true |\n| Issue #2 | SEVERE | Zero-value access to auth.Keys when auth not initialized (blocked by #1) |\n| Issue #3 | CRITICAL | Multiple DB connections with conflicting pragmas; potential lock contention |\n| Issue #4 | SEVERE | Nil-dereference risk in GetConnection; dependent on Connect order |\n| Issue #5 | SEVERE | sync.Once with no error return; silent failure mode possible |\n| Issue #6 | CRITICAL | Cascading fatal errors when Connect fails before dbConnInstance assignment |\n| Issue #7 | SEVERE | Lazy initialization timing assumptions in multi-state scenarios |\n\nThe **primary blocker is Issue #1**: The code unconditionally calls `auth.GetAuthInstance()` at server initialization time (line 123 of server.go) but only calls `auth.Init()` when DisableAuthentication is false. This will always cause a fatal error when DisableAuthentication is true, making that configuration path completely broken."}]}]},"uuid":"5fcf2680-1f53-42d5-9556-737544c5fb5c","timestamp":"2026-06-05T07:21:10.407Z","toolUseResult":{"status":"completed","prompt":"I'm doing a code review of the cc-backend Go project (ClusterCockpit) focused on CRITICAL and SEVERE issues in initialization and startup ordering. Report exact code with file:line references.\n\nInvestigate the initialization of these subsystems as called from `cmd/cc-backend/main.go` `run()`:\n\n1. `internal/config` `Init(cfg)` — does it panic/fatal on bad config? Are `config.Keys` safe to read after? Any global mutable state with concurrent access?\n\n2. `internal/repository` `Connect(dbPath)` and `SetConfig`, `GetConnection`, `GetJobRepository`, `GetUserRepository`. Is `Connect` a `sync.Once` singleton? What happens if `GetJobRepository()` / `GetUserRepository()` is called before `Connect()`? (In main.go, `handleUserCommands` calls `GetUserRepository()` — verify Connect ran first.) Does Connect call cclog.Fatal on error (aborting process)? Any nil-deref risk if connection failed?\n\n3. `internal/auth` `Init(cfg)` — singleton? What happens if `GetAuthInstance()` is called when Init was never called (e.g., when `config.Keys.DisableAuthentication` is true, auth.Init is skipped in main.go handleUserCommands, but server.go init calls `auth.GetAuthInstance()` unconditionally)? Trace whether GetAuthInstance can return nil and whether that nil is dereferenced in server.go.\n\n4. In `main.go`, note that when `DisableAuthentication` is true, `auth.Init` is NEVER called (it's inside the `if !config.Keys.DisableAuthentication` block in handleUserCommands). But `server.go` `init()` calls `authHandle := auth.GetAuthInstance()` unconditionally at the top, and later uses `authHandle` only inside `if !config.Keys.DisableAuthentication` guards. Verify: does `auth.GetAuthInstance()` return nil safely in that case, or does it log/panic? Is `auth.Keys.OpenIDConfig` accessed (server.go line ~189) when auth was never initialized — would that be a nil/zero-value access?\n\n5. Check `repository.Connect` ordering vs `handleDatabaseCommands` (migrate/revert/force) which run BEFORE `initDatabase()` in main.go run(). Do the migrate commands open their own DB connection, or rely on Connect? Is there a double-open or lock issue?\n\nQuote relevant code with file:line. Only report verifiable issues with evidence. Do not propose fixes — identify and explain with evidence.","agentId":"a1ab0aab2e286a9d7","agentType":"Explore","content":[{"type":"text","text":"Now I have a clear picture. Let me create a comprehensive report with the findings:\n\n## CRITICAL CODE REVIEW: Initialization and Startup Ordering Issues\n\nBased on my detailed analysis of the cc-backend initialization sequence, I have identified **SEVERE issues** with startup ordering and uninitialized state access. Here are the findings with exact code references:\n\n---\n\n### ISSUE 1: CRITICAL - Unconditional auth.GetAuthInstance() Call When auth.Init May Never Execute\n\n**File: `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go`, line 123**\n\n```go\nauthHandle := auth.GetAuthInstance()  // Line 123\n```\n\n**Context: Main flow in `cmd/cc-backend/main.go`**\n\n- **Lines 175-181** in `handleUserCommands()`: `auth.Init()` is ONLY called when `!config.Keys.DisableAuthentication` is true\n- **Lines 530-537** in `run()`: `handleUserCommands()` executes, but may NOT initialize auth if DisableAuthentication is true\n- **Lines 386-389** in `runServer()`: Calls `NewServer()` which immediately calls `s.init()` at line 85\n- **Lines 92-123** in `server.go init()`: Line 123 calls `auth.GetAuthInstance()` UNCONDITIONALLY\n\n**The Problem:**\n\nWhen `config.Keys.DisableAuthentication == true`:\n1. `handleUserCommands()` skips the entire `if !config.Keys.DisableAuthentication` block (lines 175-211)\n2. `auth.Init()` is **NEVER** called\n3. `authInstance` remains `nil` (see `/Users/jan/prg/ClusterCockpit/cc-backend/internal/auth/auth.go` line 52: `authInstance *Authentication`)\n4. Later, `server.go` line 123 calls `auth.GetAuthInstance()`\n5. `GetAuthInstance()` checks `if authInstance == nil` and calls `cclog.Fatal()` (line 260 in auth.go):\n\n```go\nfunc GetAuthInstance() *Authentication {\n\tif authInstance == nil {\n\t\tcclog.Fatal(\"Authentication module not initialized!\")  // Line 260\n\t}\n\treturn authInstance\n}\n```\n\n**Result:** Process aborts with `Fatal` error when authentication is disabled.\n\n**Evidence:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go` lines 170-214 (handleUserCommands)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go` line 123 (unconditional call)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/auth/auth.go` lines 50-53, 258-264\n\n---\n\n### ISSUE 2: SEVERE - auth.Keys Access Before auth.Init() With DisableAuthentication\n\n**File: `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go`, line 189**\n\n```go\nif auth.Keys.OpenIDConfig != nil {  // Line 189\n    openIDConnect := auth.NewOIDC(authHandle)\n    openIDConnect.RegisterEndpoints(s.router)\n    info[\"hasOpenIDConnect\"] = true\n}\n```\n\n**The Problem:**\n\n1. `auth.Keys` is a module-level variable (line 116 in `/Users/jan/prg/ClusterCockpit/cc-backend/internal/auth/auth.go`):\n   ```go\n   var Keys AuthConfig  // Line 116\n   ```\n\n2. `auth.Keys` is ONLY populated inside `auth.Init()` (lines 204-248 in auth.go):\n   ```go\n   if authCfg == nil {\n       return  // Lines 204-206: Early return, Keys never populated\n   }\n   config.Validate(configSchema, *authCfg)\n   dec := json.NewDecoder(bytes.NewReader(*authCfg))\n   dec.DisallowUnknownFields()\n   if err := dec.Decode(&Keys); err != nil {  // Line 211: Keys populated here\n       cclog.Errorf(\"error while decoding ldap config: %v\", err)\n   }\n   ```\n\n3. When `DisableAuthentication == true`, `auth.Init()` is never called, so `auth.Keys` remains at zero value\n4. Line 189 checks `if auth.Keys.OpenIDConfig != nil` — this is safe (nil check on zero-value struct field)\n5. BUT: If OpenID config somehow exists in zero-value (which it won't, but the code assumes it doesn't), line 190 would dereference `authHandle` which is NOT nil (from line 123's fatal call or if init somehow succeeded)\n\n**Actually Safe But Fragile:** The nil-check at line 189 prevents dereferencing, BUT:\n- The entire initialization depends on `auth.GetAuthInstance()` at line 123 succeeding\n- If that call doesn't fatal, then line 190 (`NewOIDC(authHandle)`) will execute with potentially uninitialized `auth.Keys`\n\n**Evidence:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/auth/auth.go` lines 181-256 (Init function with conditional early return)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/auth/auth.go` line 116 (Keys declaration)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go` lines 189-193\n\n---\n\n### ISSUE 3: CRITICAL - Database Migration Commands Execute Before Connect()\n\n**File: `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go`, lines 507-514**\n\n```go\n// Handle database migration (migrate, revert, force)\nif err := handleDatabaseCommands(); err != nil {  // Line 507\n    return err\n}\n\n// Initialize database\nif err := initDatabase(); err != nil {  // Line 512\n    return err\n}\n```\n\n**The Problem:**\n\n1. `handleDatabaseCommands()` (lines 139-168) calls:\n   - `repository.MigrateDB(config.Keys.DB)` (line 141)\n   - `repository.RevertDB(config.Keys.DB)` (line 150)\n   - `repository.ForceDB(config.Keys.DB)` (line 159)\n\n2. These functions in `/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/migration.go` (lines 113-204):\n   ```go\n   func MigrateDB(db string) error {\n       m, err := getMigrateInstance(db)  // Line 114\n       if err != nil {\n           return err\n       }\n       // ...\n       if err := m.Up(); err != nil {  // Line 136\n   ```\n   \n   Each creates a NEW database connection via `getMigrateInstance()` which calls:\n   ```go\n   m, err = migrate.NewWithSourceInstance(\"iofs\", d, \n       fmt.Sprintf(\"sqlite3://%s?_foreign_keys=on\", db))  // Line 88\n   ```\n\n3. These migrations open THEIR OWN database connections (not using `repository.Connect()`)\n\n4. THEN `initDatabase()` (lines 111-137) calls:\n   ```go\n   repository.SetConfig(cfg)  // Line 133\n   repository.Connect(config.Keys.DB)  // Line 135\n   ```\n\n**Issue:** Multiple independent database connections open to the same SQLite file. SQLite with `_journal_mode=WAL` can handle multiple readers, but:\n- Migration might hold a write lock while `Connect()` tries to initialize\n- The `repository.Connect()` uses different SQLite pragmas (lines 39-53 in dbConnection.go) than the migration's `_foreign_keys=on` only\n- No ordering guarantees that migrations complete before Connect() proceeds\n\n**Evidence:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go` lines 139-168 (handleDatabaseCommands)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/migration.go` lines 82-94 (getMigrateInstance opens own connection)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go` lines 111-137 (initDatabase)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/dbConnection.go` lines 55-110 (Connect with different pragmas)\n\n---\n\n### ISSUE 4: CRITICAL - GetUserRepository() and GetJobRepository() Can Be Called Before Connect()\n\n**File: `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go`, line 232**\n\n```go\nur := repository.GetUserRepository()  // Called in addUser() at line 232\n```\n\n**Call Chain:**\n1. Line 531: `handleUserCommands()` is called\n2. Lines 186-189: `addUser(flagNewUser)` is called AFTER auth.Init but only if `!DisableAuthentication`\n3. Line 232 (addUser): `repository.GetUserRepository()` is called\n\n**The Problem:**\n\n`GetUserRepository()` in `/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/user.go` lines 59-69:\n\n```go\nfunc GetUserRepository() *UserRepository {\n    userRepoOnce.Do(func() {\n        db := GetConnection()  // Line 61\n        \n        userRepoInstance = &UserRepository{\n            DB:     db.DB,\n            driver: db.Driver,\n        }\n    })\n    return userRepoInstance\n}\n```\n\nIt calls `GetConnection()` (line 61) which, in `/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/dbConnection.go` lines 112-118:\n\n```go\nfunc GetConnection() *DBConnection {\n    if dbConnInstance == nil {\n        cclog.Fatalf(\"Database connection not initialized!\")  // Line 114\n    }\n    return dbConnInstance\n}\n```\n\n**Will fatal if `Connect()` was never called.**\n\nBUT: The order in `main.go run()` is:\n- Line 512: `initDatabase()` calls `repository.Connect()`\n- Line 531: `handleUserCommands()` calls `addUser()` which calls `GetUserRepository()`\n\n**Actually Safe in Current Flow** - but `handleUserCommands()` reads from user repos (lines 232, 247, 269) which depend on `Connect()` having executed at line 512.\n\n**However:** No synchronization prevents races if `Connect()` fails silently. More critically:\n\n**At line 518** (flagOptimizeDB):\n```go\ndb := repository.GetConnection()  // Line 518\n```\n\nThis is called BEFORE `handleUserCommands()`. If `initDatabase()` fails but doesn't return (e.g., returns partial error), this could call GetConnection before Connect succeeded.\n\n**Evidence:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/user.go` lines 59-69\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/dbConnection.go` lines 112-118\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go` lines 517-528 (GetConnection before handleUserCommands)\n\n---\n\n### ISSUE 5: SEVERE - Connect() Uses sync.Once Without Error Handling\n\n**File: `/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/dbConnection.go`, lines 55-110**\n\n```go\nfunc Connect(db string) {\n    var err error\n    var dbHandle *sqlx.DB\n\n    dbConnOnce.Do(func() {  // Line 59: sync.Once closure\n        // ... setup connection ...\n        if err != nil {\n            cclog.Abortf(\"DB Connection: Could not connect to SQLite database...\")  // Lines 87-88\n        }\n        // ...\n        if err != nil {\n            cclog.Abortf(\"Failed sqlite db setup...\")  // Lines 92-93\n        }\n        // ...\n        if err != nil {\n            cclog.Abortf(\"DB Connection: Failed DB version check...\")  // Lines 106-107\n        }\n    })\n}\n```\n\n**The Problem:**\n\n1. `Connect()` has NO return value - it's `func Connect(db string)` (line 55)\n2. All errors are handled via `cclog.Abortf()` which terminates the process\n3. If ANY error occurs inside the sync.Once closure, the process terminates\n4. BUT: The sync.Once ensures the function body only runs ONCE\n5. If someone calls `Connect()` twice with different `db` parameters:\n   - First call: Initializes to db1\n   - Second call: sync.Once.Do() doesn't execute, so db1 remains active\n   - No way to know this silently happened\n\n**This is not a crash scenario, but a silent failure scenario:**\n\nExample problematic code (doesn't exist but could):\n```go\nrepository.Connect(\"/path1/db.sqlite\")\nrepository.Connect(\"/path2/db.sqlite\")  // Silently ignored\n// Now using /path1/db.sqlite when expecting /path2/db.sqlite\n```\n\n**More Critical:** No way to verify Connect actually succeeded. Code at line 518 assumes it worked:\n\n```go\ndb := repository.GetConnection()  // Assumes Connect succeeded\nif _, err := db.DB.Exec(\"VACUUM\"); err != nil {  // Could be operating on wrong DB\n```\n\n**Evidence:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/dbConnection.go` lines 55-110\n- Uses `sync.Once` with no return value or error channel\n- All error handling via `cclog.Abortf()` which fatals\n\n---\n\n### ISSUE 6: Repository State Access When Connect() Calls cclog.Abort\n\n**File: `/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/dbConnection.go`, lines 88, 93, 107**\n\nWhen errors occur during `Connect()`:\n```go\ncclog.Abortf(\"DB Connection: Could not connect...\")  // Line 88\ncclog.Abortf(\"Failed sqlite db setup...\")            // Line 93\ncclog.Abortf(\"DB Connection: Failed DB version check...\")  // Line 107\n```\n\nThese are called BEFORE `dbConnInstance` is assigned (line 104):\n```go\ndbConnInstance = &DBConnection{DB: dbHandle}  // Line 104\n```\n\nIf an error occurs at lines 87-88 or 92-93, `dbConnInstance` remains `nil`.\n\nLater calls to `GetConnection()` at line 518 or 232 will fatal with \"Database connection not initialized!\"\n\n**But cclog.Abort likely terminates the process anyway**, so this is a cascading fatal scenario.\n\n**Evidence:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/repository/dbConnection.go` lines 55-110\n- Error handling order: errors checked BEFORE dbConnInstance assignment\n\n---\n\n### ISSUE 7: Repository Repositories Never Initialized When DisableAuthentication=true\n\nWhen `DisableAuthentication == true`:\n\n1. `handleUserCommands()` returns immediately (lines 175-181)\n2. `auth.Init()` is never called\n3. BUT `server.go` line 123 REQUIRES `auth.GetAuthInstance()` to work\n4. This will fatal at that point\n\n**But if it somehow passed**, consider:\n- User repositories are lazily initialized via `sync.Once` in `GetUserRepository()`\n- If auth never initialized and user commands never run, repositories might not be initialized at all\n- Later HTTP handler access might trigger lazy init, which could fail\n\n**Likelihood:** Server crashes before handlers even load due to Issue #1.\n\n---\n\n### Summary of Severity\n\n| Issue | Severity | Impact |\n|-------|----------|--------|\n| Issue #1 | CRITICAL | Process fatal aborts when DisableAuthentication=true |\n| Issue #2 | SEVERE | Zero-value access to auth.Keys when auth not initialized (blocked by #1) |\n| Issue #3 | CRITICAL | Multiple DB connections with conflicting pragmas; potential lock contention |\n| Issue #4 | SEVERE | Nil-dereference risk in GetConnection; dependent on Connect order |\n| Issue #5 | SEVERE | sync.Once with no error return; silent failure mode possible |\n| Issue #6 | CRITICAL | Cascading fatal errors when Connect fails before dbConnInstance assignment |\n| Issue #7 | SEVERE | Lazy initialization timing assumptions in multi-state scenarios |\n\nThe **primary blocker is Issue #1**: The code unconditionally calls `auth.GetAuthInstance()` at server initialization time (line 123 of server.go) but only calls `auth.Init()` when DisableAuthentication is false. This will always cause a fatal error when DisableAuthentication is true, making that configuration path completely broken."}],"totalDurationMs":70225,"totalTokens":59366,"totalToolUseCount":29,"usage":{"input_tokens":6,"cache_creation_input_tokens":596,"cache_read_input_tokens":54516,"output_tokens":4248,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":0,"ephemeral_5m_input_tokens":596},"inference_geo":"not_available","iterations":[{"input_tokens":6,"output_tokens":4248,"cache_read_input_tokens":54516,"cache_creation_input_tokens":596,"cache_creation":{"ephemeral_5m_input_tokens":596,"ephemeral_1h_input_tokens":0},"type":"message"}],"speed":"standard"},"toolStats":{"readCount":20,"searchCount":0,"bashCount":9,"editFileCount":0,"linesAdded":0,"linesRemoved":0,"otherToolCount":0}},"sourceToolAssistantUUID":"984fa08e-dd63-448f-ba1c-c78b1047b9ce","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"cd24ed0b-aac8-4a0d-8469-af59a2c782fa","isSidechain":false,"promptId":"e03eec5c-111d-4cd6-a2ad-e4499d1dc6b1","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01VBX7kF2shZTMDZCJav21rr","type":"tool_result","content":[{"type":"text","text":"Perfect. Now I have a complete picture. Let me create the comprehensive report.\n\n---\n\n## CRITICAL AND SEVERE LIFECYCLE ISSUES IN ARCHIVER AND TASKMANAGER\n\nBased on thorough code review of `internal/archiver/archiveWorker.go`, `internal/archiver/archiver.go`, `internal/taskmanager/taskManager.go`, and their integration in `cmd/cc-backend/main.go` and `cmd/cc-backend/server.go`, I've identified several critical issues:\n\n---\n\n### **ARCHIVER SUBSYSTEM ISSUES**\n\n#### **ISSUE 1: CRITICAL - Potential Nil Channel Send/Receive (Race Condition on Start)**\n\n**File/Line References:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:62-69` (package-level globals)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:85-92` (Start function)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:187-194` (TriggerArchiving)\n\n**Problem:**\nThe archiver uses uninitialized package-level variables. These globals are initialized in `Start()`:\n\n```go\nvar (\n    archivePending sync.WaitGroup        // line 63 - ZERO VALUE AT PACKAGE INIT\n    archiveChannel chan *schema.Job      // line 64 - NIL AT PACKAGE INIT\n    jobRepo        *repository.JobRepository  // line 65 - NIL AT PACKAGE INIT\n    shutdownCtx    context.Context       // line 66 - NIL (ZERO VALUE)\n    shutdownCancel context.CancelFunc    // line 67 - NIL\n    workerDone     chan struct{}         // line 68 - NIL AT PACKAGE INIT\n)\n\nfunc Start(r *repository.JobRepository, ctx context.Context) {  // line 85\n    shutdownCtx, shutdownCancel = context.WithCancel(ctx)\n    archiveChannel = make(chan *schema.Job, 128)\n    workerDone = make(chan struct{})\n    jobRepo = r\n    go archivingWorker()                 // line 91\n}\n```\n\n**Failure Scenario:**\nIf `TriggerArchiving()` is called before `Start()` completes, or if there's memory visibility issue across goroutines (Go memory model guarantees ordering only within synchronization primitives), the send on line 193 could fail:\n\n```go\nfunc TriggerArchiving(job *schema.Job) {\n    if archiveChannel == nil {  // line 188 - CHECK\n        cclog.Fatal(\"Cannot archive without archiving channel. Did you Start the archiver?\")\n    }\n    archivePending.Add(1)       // line 192 - RACES WITH START\n    archiveChannel <- job       // line 193 - COULD SEND ON NIL IF RACE EXISTS\n}\n```\n\nThe nil-channel check happens AFTER goroutines spawn in `Start()` (line 91). If a job calls `TriggerArchiving()` during `Start()` execution and before line 87 completes, the channel is still nil but the check passed (check-then-act race).\n\n**Root Cause:** No synchronization (mutex/sync.Once) protecting initialization of these globals.\n\n---\n\n#### **ISSUE 2: CRITICAL - Double-Close Panic on Multiple Start() Calls**\n\n**File/Line References:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:85-92`\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:226`\n\n**Problem:**\n`Start()` is documented as \"Safe to call only once\" but has no enforcement. If called twice:\n\n**First Start():**\n```go\narchiveChannel = make(chan *schema.Job, 128)  // line 87: creates channel\nworkerDone = make(chan struct{})              // line 88: creates channel\ngo archivingWorker()                          // line 91: spawns goroutine\n```\n\n**Second Start():**\n```go\narchiveChannel = make(chan *schema.Job, 128)  // OVERWRITES - old channel still has worker reading it\nworkerDone = make(chan struct{})              // OVERWRITES - old defer close(workerDone) will panic\ngo archivingWorker()                          // spawns SECOND worker\n```\n\nThen on `Shutdown()`:\n```go\nclose(archiveChannel)  // line 226: PANICS - already closed by old worker's defer on line 111\n```\n\nThe old worker's `defer close(workerDone)` (line 111) will panic when the new `Start()` overwrites `workerDone` and closes it twice.\n\n**Root Cause:** No guard against re-initialization; `Start()` directly overwrites globals without cleanup.\n\n---\n\n#### **ISSUE 3: CRITICAL - Double-Close Panic on archiveChannel in Shutdown**\n\n**File/Line References:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:110-122`\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:222-226`\n\n**Problem:**\nMultiple execution paths can close `archiveChannel`:\n\n1. **Normal shutdown path** (line 226 in `Shutdown()`):\n   ```go\n   close(archiveChannel)  // line 226\n   ```\n\n2. **Worker exit path** when channel naturally closes (line 119-122 in `archivingWorker()`):\n   ```go\n   case job, ok := <-archiveChannel:  // line 119\n       if !ok {                         // line 120 - channel closed\n           cclog.Info(\"Archive channel closed, worker exiting\")\n           return                       // line 122 - exits cleanly\n       }\n   ```\n\n3. **If worker goroutine crashes or is never started**, `Shutdown()` still calls `close(archiveChannel)` on an already-closed channel from a previous execution.\n\n**Critical scenario:** If `Start()` never completes successfully (e.g., context cancelled before line 91), `archiveChannel` is created (line 87) but worker never starts. Then `Shutdown()` tries to close a channel with no consumer, which is safe. BUT if `Start()` is called twice and the first worker's cleanup races with the second `Shutdown()`, both workers and shutdown try to close the same channel.\n\n**Root Cause:** No state tracking to know if channels are initialized and whether worker is running.\n\n---\n\n#### **ISSUE 4: SEVERE - Goroutine Leak and Stuck Reader on Shutdown Timeout**\n\n**File/Line References:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:229-249`\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:113-122`\n\n**Problem:**\nThe shutdown mechanism has a subtle deadlock risk:\n\n```go\nfunc Shutdown(timeout time.Duration) error {\n    close(archiveChannel)  // line 226: stops accepting jobs\n    \n    done := make(chan struct{})\n    go func() {                            // line 230: NEW goroutine\n        archivePending.Wait()              // line 231: waits for all jobs to complete\n        close(done)                        // line 232\n    }()\n    \n    select {\n    case <-done:\n        cclog.Info(\"All archive jobs completed successfully\")\n        <-workerDone                       // line 240: waits for FIRST worker\n        return nil\n    case <-time.After(timeout):            // line 242\n        cclog.Warn(\"Archiver shutdown timeout exceeded, cancelling remaining operations\")\n        shutdownCancel()                   // line 245: cancels shutdown context\n        <-workerDone                       // line 247: waits for worker to exit\n        return fmt.Errorf(\"archiver shutdown timeout after %v\", timeout)\n    }\n}\n```\n\n**Failure Scenario 1: Deadlock on Pending Jobs**\n\nIf an archiving job is stuck (e.g., blocked on `ArchiveJob()` line 137 waiting for metric data that never arrives):\n- `archivePending.Wait()` (line 231) blocks forever\n- `done` channel never closes\n- Timeout fires (line 242)\n- `shutdownCancel()` cancels context (line 245)\n- Worker receives `shutdownCtx.Done()` signal (line 115)\n- But if job is stuck reading from a channel that ALSO depends on the context, we have a mutual wait\n\n**Failure Scenario 2: Goroutine Leak**\n\nIf `Start()` was never called:\n- `workerDone` is nil (line 68 uninitialized)\n- `Shutdown()` tries to read `<-workerDone` (line 240 or 247)\n- **PANIC: send on nil channel** (reading from nil panics)\n\nCode at line 188-189 handles nil `archiveChannel` but **`workerDone` is never checked**:\n\n```go\nif archiveChannel == nil {                 // line 188: checked\n    cclog.Fatal(\"Cannot archive without archiving channel. Did you Start the archiver?\")\n}\n// BUT: no check for workerDone being nil\n```\n\n**Root Cause:** No validation that `Start()` was actually called before `Shutdown()`; WaitGroup.Wait() can block indefinitely if jobs never complete.\n\n---\n\n#### **ISSUE 5: SEVERE - Data Loss of Queued Archive Jobs on Timeout**\n\n**File/Line References:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:125-169`\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go:489`\n\n**Problem:**\nWhen shutdown timeout is exceeded, in-flight jobs are abandoned:\n\n```go\nfunc archivingWorker() {\n    for {\n        select {\n        case <-shutdownCtx.Done():         // line 115: context cancelled on timeout\n            cclog.Info(\"Archive worker received shutdown signal\")\n            return                         // line 117: EXITS, abandoning active job\n        // ... job processing ...\n        }\n    }\n}\n```\n\nOn timeout (server.go line 500, 60-second limit):\n```go\nselect {\ncase <-done:\n    cclog.Infof(\"Shutdown: metricstore + archiver completed (%v)\", time.Since(storeStart))\ncase <-time.After(60 * time.Second):  // line 500\n    cclog.Warnf(\"Shutdown deadline exceeded after %v, forcing exit\", time.Since(shutdownStart))\n    // Server exits here - any job being processed in ArchiveJob() is lost\n}\n```\n\nA job that's 50 seconds into a 70-second archive operation will:\n1. Have `archivePending.Done()` **never called** (not even in error path on context cancel)\n2. Never be marked as `MonitoringStatusArchivingFailed` (no error handling for context timeout)\n3. Remain in database as `MonitoringStatusRunning` or previous state\n\nThe job's metric data is **partially archived or not archived at all**, and the database state is inconsistent.\n\n**Root Cause:** Context cancellation during in-flight `ArchiveJob()` (line 137) doesn't trigger `archivePending.Done()` cleanup if context times out mid-operation.\n\n---\n\n#### **ISSUE 6: MODERATE - Missing archivePending.Done() in Timeout Path**\n\n**File/Line References:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:110-170`\n\n**Problem:**\nEvery code path that adds to `archivePending.Add(1)` (line 192) must call `Done()`. Missing calls:\n\n```go\nfunc archivingWorker() {\n    for {\n        select {\n        case <-shutdownCtx.Done():  // line 115 - TIMEOUT PATH\n            cclog.Info(\"Archive worker received shutdown signal\")\n            return                  // line 117: NO archivePending.Done() CALLED\n            \n        case job, ok := <-archiveChannel:\n            if !ok {\n                return              // line 122: NO Done() - but channel closed naturally\n            }\n            // Multiple Done() calls on error paths - CORRECT\n            if _, err := jobRepo.FetchMetadata(job); err {\n                archivePending.Done()  // line 131 - OK\n                continue\n            }\n            // ... more error paths with Done() ...\n        }\n    }\n}\n```\n\nWhen `shutdownCtx` is cancelled (line 245 in `Shutdown()`) while a job is being processed:\n- Line 115 fires\n- `archivingWorker()` exits (line 117)\n- **The job being processed has `archivePending.Add(1)` but never gets `Done()`**\n- `archivePending.Wait()` (line 231) hangs forever\n\nThis directly causes **ISSUE 4 (deadlock on Shutdown timeout)**.\n\n**Root Cause:** Context cancellation path doesn't decrement the pending counter for the job that was in-flight.\n\n---\n\n### **TASKMANAGER SUBSYSTEM ISSUES**\n\n#### **ISSUE 7: CRITICAL - Nil Scheduler Panic if Shutdown Called Without Start**\n\n**File/Line References:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/taskmanager/taskManager.go:52-57` (globals)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/taskmanager/taskManager.go:105-145` (Start)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/taskmanager/taskManager.go:165-169` (Shutdown)\n\n**Problem:**\nTaskManager stores a scheduler in a package-level variable with zero value:\n\n```go\nvar (\n    s       gocron.Scheduler          // line 53: ZERO VALUE (nil interface{})\n    jobRepo *repository.JobRepository // line 54: NIL\n    Keys    CronFrequency             // line 56: ZERO STRUCT\n)\n\nfunc Start(cronCfg, archiveConfig json.RawMessage) {  // line 105\n    var err error\n    jobRepo = repository.GetJobRepository()\n    s, err = gocron.NewScheduler()    // line 108: initializes global s\n    if err != nil {\n        cclog.Abortf(\"Taskmanager Start: Could not create gocron scheduler.\\nError: %s\\n\", err.Error())\n    }\n    // ... register jobs ...\n    s.Start()                         // line 144\n}\n\nfunc Shutdown() {  // line 165\n    if s != nil {  // line 166: CHECK FOR NIL\n        s.Shutdown()\n    }\n}\n```\n\n**Failure Scenario:**\n\n1. If `Start()` is never called, `s` remains nil\n2. If `Shutdown()` is called, it safely checks `s != nil` (line 166) - **THIS CHECK WORKS**\n3. **BUT** if `Start()` is called, fails at line 110 (context cancelled or config error), and then `Shutdown()` is called, the nil check passes but `s` is partially initialized (could be in an invalid state)\n\nMore critically: **If `Start()` is called twice** (no re-initialization guard):\n\n```go\n// First Start()\ns, err = gocron.NewScheduler()  // line 108: creates scheduler S1\nRegisterFootprintWorker()        // line 136: adds job to S1\ns.Start()                        // line 144: S1 starts\n\n// Code attempts to re-initialize (e.g., hot reload config)\n// Second Start()\ns, err = gocron.NewScheduler()  // line 108: OVERWRITES with S2\n// ... registers jobs to S2 ...\ns.Start()                        // line 144: S2 starts, but S1 is still running!\n```\n\nResult: **Two schedulers running concurrently**, each with separate job lists, leading to duplicate job executions or resource exhaustion.\n\n**Root Cause:** No `sync.Once` guard on `Start()`; global `s` can be reinitialized.\n\n---\n\n#### **ISSUE 8: SEVERE - Resource Leak on Failed Start (Aborted Process)**\n\n**File/Line References:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/taskmanager/taskManager.go:108-111`\n\n**Problem:**\nIf scheduler creation fails:\n\n```go\ns, err = gocron.NewScheduler()  // line 108\nif err != nil {\n    cclog.Abortf(\"Taskmanager Start: Could not create gocron scheduler.\\nError: %s\\n\", err.Error())  // line 110\n}\n```\n\n`cclog.Abortf()` **kills the entire process** without cleanup:\n- Active archiver goroutine is left running\n- Archiver has queued jobs in `archiveChannel` (if it was started before taskmanager)\n- HTTP server goroutine is still running\n- No graceful shutdown of other subsystems\n\nThe process dies abruptly, potentially leaving:\n- Incomplete database transactions\n- Stale lock files\n- Queued archive jobs never persisted to database\n\n**Root Cause:** `Abort()` call prevents graceful shutdown sequence; should return error instead.\n\n---\n\n#### **ISSUE 9: MODERATE - Missing Validation of Start Preconditions**\n\n**File/Line References:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/taskmanager/taskManager.go:105-145`\n\n**Problem:**\n`Start()` depends on global state being initialized:\n\n```go\nfunc Start(cronCfg, archiveConfig json.RawMessage) {  // line 105\n    var err error\n    jobRepo = repository.GetJobRepository()           // line 107: assumes config.Keys is set\n    \n    dec := json.NewDecoder(bytes.NewReader(cronCfg))  // line 117: uses cronCfg\n    // ...\n    if config.Keys.StopJobsExceedingWalltime > 0 { // line 113: reads global config\n        RegisterStopJobsExceedTime()\n    }\n```\n\nIf `config.Init()` was never called (in main.go line 107), `config.Keys` is zero-valued and all config checks return incorrect defaults. No validation ensures prerequisites are met before starting taskmanager.\n\n---\n\n### **INTEGRATION AND SHUTDOWN SEQUENCING ISSUES**\n\n#### **ISSUE 10: SEVERE - No Archiver Shutdown in main.go Signal Handler**\n\n**File/Line References:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go:402-418`\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go:455-505`\n\n**Problem:**\nThe signal handler in main.go calls `taskmanager.Shutdown()` (line 417) but **NOT** `archiver.Shutdown()`:\n\n```go\n// main.go, signal handler (line 406-418)\ngo func() {\n    defer wg.Done()\n    select {\n    case <-sigs:\n        cclog.Info(\"Shutdown signal received\")\n    case <-ctx.Done():\n    }\n    \n    runtime.SystemdNotify(false, \"Shutting down ...\")\n    srv.Shutdown(ctx)              // line 415: HTTP server\n    util.FsWatcherShutdown()        // line 416: file watcher\n    taskmanager.Shutdown()          // line 417: task manager\n    // MISSING: archiver.Shutdown() HERE\n}()\n```\n\n**BUT** `server.Shutdown()` DOES call `archiver.Shutdown()` (server.go line 489):\n\n```go\n// server.go, Server.Shutdown() method (line 488-492)\nwg.Go(func() {\n    if err := archiver.Shutdown(60 * time.Second); err != nil {\n        cclog.Warnf(\"Archiver shutdown: %v\", err)\n    }\n})\n```\n\n**Race Condition:**\n1. Signal handler calls `srv.Shutdown(ctx)` (main.go line 415)\n2. Server.Shutdown() calls `archiver.Shutdown()` (server.go line 489)\n3. But signal handler returns and `wg.Done()` is called (main.go line 407)\n4. If `srv.Shutdown()` completes before `archiver.Shutdown()` completes, the server goroutine may exit\n5. Then main waits on `wg` to complete (main.go line 430), but if archiver is still shutting down, the timing is off\n\n**More critically:** The `server.Shutdown()` is passed `ctx`, but at line 466:\n\n```go\nshutdownCtx, cancel := context.WithTimeout(ctx, 60*time.Second)  // line 466\n```\n\nA **new 60-second timeout** is created. But `archiver.Shutdown()` at line 489 also gets a 60-second timeout **independently**. If both hit their timeouts, the process can be stuck for 120 seconds.\n\n**Root Cause:** Archiver shutdown is buried inside `Server.Shutdown()` instead of being in the main signal handler alongside other subsystems.\n\n---\n\n#### **ISSUE 11: MODERATE - No Timeout on taskmanager.Shutdown()**\n\n**File/Line References:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go:417`\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/taskmanager/taskManager.go:165-169`\n\n**Problem:**\n`taskmanager.Shutdown()` has no timeout mechanism:\n\n```go\nfunc Shutdown() {  // line 165 - NO timeout parameter\n    if s != nil {\n        s.Shutdown()  // line 167: no timeout, blocks until scheduler fully stopped\n    }\n}\n```\n\nIf a cron job hangs (e.g., database deadlock in `RegisterFootprintWorker` at line 147), `s.Shutdown()` will block indefinitely. The signal handler in main.go (line 417) will hang, and the process won't exit.\n\nContrast with `archiver.Shutdown(timeout)` which takes a timeout parameter.\n\n**Root Cause:** TaskManager's shutdown doesn't support graceful timeout like archiver does.\n\n---\n\n### **SUMMARY TABLE**\n\n| Issue | Severity | Component | Impact | File:Line |\n|-------|----------|-----------|--------|-----------|\n| Nil channel send race | CRITICAL | Archiver | Send panic if TriggerArchiving() called during Start() | archiveWorker.go:87-92,193 |\n| Double-close on reinitialization | CRITICAL | Archiver | Panic on Shutdown if Start called twice | archiveWorker.go:85-92,226 |\n| Double-close on shutdown | CRITICAL | Archiver | Panic if channels already closed | archiveWorker.go:110-122,226 |\n| Nil workerDone panic | CRITICAL | Archiver | Panic on Shutdown if Start never called | archiveWorker.go:68,240,247 |\n| Data loss on timeout | SEVERE | Archiver | Incomplete archives, inconsistent DB state | archiveWorker.go:115-117,137 |\n| Missing Done() on context cancel | SEVERE | Archiver | Deadlock in Shutdown waiting for pending jobs | archiveWorker.go:115-117,231 |\n| Double-scheduler leak | CRITICAL | TaskManager | Duplicate cron executions, resource waste | taskManager.go:108,144 |\n| Process abort on init failure | SEVERE | TaskManager | No graceful shutdown if scheduler creation fails | taskManager.go:110 |\n| Signal handler missing archiver | SEVERE | Integration | Archiver shutdown timing issues | main.go:417 |\n| No taskmanager timeout | MODERATE | TaskManager | Process can hang if cron job stalls | taskManager.go:167 |\n| Unvalidated preconditions | MODERATE | Both | Silent failures if initialization order violated | main.go:376-378 |"}]}]},"uuid":"a14235da-1ca1-47e2-a7f0-99ba5009b4e2","timestamp":"2026-06-05T07:21:38.760Z","toolUseResult":{"status":"completed","prompt":"I'm doing a code review of the cc-backend Go project focused on CRITICAL and SEVERE issues in initialization, startup, and shutdown.\n\nInvestigate the lifecycle of the archiver and taskmanager subsystems. Read these and report exact code with file:line references:\n\n1. `internal/archiver/` — the `Start(jobRepo, ctx)` function and `Shutdown(timeout)` function. How are goroutines/channels started? Is there a worker pool? What happens to in-flight or queued archive jobs on Shutdown? Can Shutdown be called when Start was never called (nil channel / closed channel)? Can `archiver.Shutdown` deadlock or panic? Is there a risk of send-on-closed-channel or double-close?\n\n2. `internal/taskmanager/` — `Start(cronCfg, archiveCfg)` and `Shutdown()`. What does it manage (cron jobs)? Does Shutdown wait for running tasks? Any global/singleton state that breaks if Start not called?\n\n3. Look for any package-level singletons, `sync.Once`, or global variables in these packages that affect re-initialization or shutdown safety.\n\nReport concrete problems: nil-channel sends, double-close panics, goroutine leaks, missing waits, data loss of queued work on shutdown, ignored errors. Quote the relevant code with file:line. Be thorough but only report what you can verify in the code. Do not propose fixes — just identify and explain issues with evidence.","agentId":"a423cc039feac8897","agentType":"Explore","content":[{"type":"text","text":"Perfect. Now I have a complete picture. Let me create the comprehensive report.\n\n---\n\n## CRITICAL AND SEVERE LIFECYCLE ISSUES IN ARCHIVER AND TASKMANAGER\n\nBased on thorough code review of `internal/archiver/archiveWorker.go`, `internal/archiver/archiver.go`, `internal/taskmanager/taskManager.go`, and their integration in `cmd/cc-backend/main.go` and `cmd/cc-backend/server.go`, I've identified several critical issues:\n\n---\n\n### **ARCHIVER SUBSYSTEM ISSUES**\n\n#### **ISSUE 1: CRITICAL - Potential Nil Channel Send/Receive (Race Condition on Start)**\n\n**File/Line References:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:62-69` (package-level globals)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:85-92` (Start function)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:187-194` (TriggerArchiving)\n\n**Problem:**\nThe archiver uses uninitialized package-level variables. These globals are initialized in `Start()`:\n\n```go\nvar (\n    archivePending sync.WaitGroup        // line 63 - ZERO VALUE AT PACKAGE INIT\n    archiveChannel chan *schema.Job      // line 64 - NIL AT PACKAGE INIT\n    jobRepo        *repository.JobRepository  // line 65 - NIL AT PACKAGE INIT\n    shutdownCtx    context.Context       // line 66 - NIL (ZERO VALUE)\n    shutdownCancel context.CancelFunc    // line 67 - NIL\n    workerDone     chan struct{}         // line 68 - NIL AT PACKAGE INIT\n)\n\nfunc Start(r *repository.JobRepository, ctx context.Context) {  // line 85\n    shutdownCtx, shutdownCancel = context.WithCancel(ctx)\n    archiveChannel = make(chan *schema.Job, 128)\n    workerDone = make(chan struct{})\n    jobRepo = r\n    go archivingWorker()                 // line 91\n}\n```\n\n**Failure Scenario:**\nIf `TriggerArchiving()` is called before `Start()` completes, or if there's memory visibility issue across goroutines (Go memory model guarantees ordering only within synchronization primitives), the send on line 193 could fail:\n\n```go\nfunc TriggerArchiving(job *schema.Job) {\n    if archiveChannel == nil {  // line 188 - CHECK\n        cclog.Fatal(\"Cannot archive without archiving channel. Did you Start the archiver?\")\n    }\n    archivePending.Add(1)       // line 192 - RACES WITH START\n    archiveChannel <- job       // line 193 - COULD SEND ON NIL IF RACE EXISTS\n}\n```\n\nThe nil-channel check happens AFTER goroutines spawn in `Start()` (line 91). If a job calls `TriggerArchiving()` during `Start()` execution and before line 87 completes, the channel is still nil but the check passed (check-then-act race).\n\n**Root Cause:** No synchronization (mutex/sync.Once) protecting initialization of these globals.\n\n---\n\n#### **ISSUE 2: CRITICAL - Double-Close Panic on Multiple Start() Calls**\n\n**File/Line References:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:85-92`\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:226`\n\n**Problem:**\n`Start()` is documented as \"Safe to call only once\" but has no enforcement. If called twice:\n\n**First Start():**\n```go\narchiveChannel = make(chan *schema.Job, 128)  // line 87: creates channel\nworkerDone = make(chan struct{})              // line 88: creates channel\ngo archivingWorker()                          // line 91: spawns goroutine\n```\n\n**Second Start():**\n```go\narchiveChannel = make(chan *schema.Job, 128)  // OVERWRITES - old channel still has worker reading it\nworkerDone = make(chan struct{})              // OVERWRITES - old defer close(workerDone) will panic\ngo archivingWorker()                          // spawns SECOND worker\n```\n\nThen on `Shutdown()`:\n```go\nclose(archiveChannel)  // line 226: PANICS - already closed by old worker's defer on line 111\n```\n\nThe old worker's `defer close(workerDone)` (line 111) will panic when the new `Start()` overwrites `workerDone` and closes it twice.\n\n**Root Cause:** No guard against re-initialization; `Start()` directly overwrites globals without cleanup.\n\n---\n\n#### **ISSUE 3: CRITICAL - Double-Close Panic on archiveChannel in Shutdown**\n\n**File/Line References:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:110-122`\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:222-226`\n\n**Problem:**\nMultiple execution paths can close `archiveChannel`:\n\n1. **Normal shutdown path** (line 226 in `Shutdown()`):\n   ```go\n   close(archiveChannel)  // line 226\n   ```\n\n2. **Worker exit path** when channel naturally closes (line 119-122 in `archivingWorker()`):\n   ```go\n   case job, ok := <-archiveChannel:  // line 119\n       if !ok {                         // line 120 - channel closed\n           cclog.Info(\"Archive channel closed, worker exiting\")\n           return                       // line 122 - exits cleanly\n       }\n   ```\n\n3. **If worker goroutine crashes or is never started**, `Shutdown()` still calls `close(archiveChannel)` on an already-closed channel from a previous execution.\n\n**Critical scenario:** If `Start()` never completes successfully (e.g., context cancelled before line 91), `archiveChannel` is created (line 87) but worker never starts. Then `Shutdown()` tries to close a channel with no consumer, which is safe. BUT if `Start()` is called twice and the first worker's cleanup races with the second `Shutdown()`, both workers and shutdown try to close the same channel.\n\n**Root Cause:** No state tracking to know if channels are initialized and whether worker is running.\n\n---\n\n#### **ISSUE 4: SEVERE - Goroutine Leak and Stuck Reader on Shutdown Timeout**\n\n**File/Line References:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:229-249`\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:113-122`\n\n**Problem:**\nThe shutdown mechanism has a subtle deadlock risk:\n\n```go\nfunc Shutdown(timeout time.Duration) error {\n    close(archiveChannel)  // line 226: stops accepting jobs\n    \n    done := make(chan struct{})\n    go func() {                            // line 230: NEW goroutine\n        archivePending.Wait()              // line 231: waits for all jobs to complete\n        close(done)                        // line 232\n    }()\n    \n    select {\n    case <-done:\n        cclog.Info(\"All archive jobs completed successfully\")\n        <-workerDone                       // line 240: waits for FIRST worker\n        return nil\n    case <-time.After(timeout):            // line 242\n        cclog.Warn(\"Archiver shutdown timeout exceeded, cancelling remaining operations\")\n        shutdownCancel()                   // line 245: cancels shutdown context\n        <-workerDone                       // line 247: waits for worker to exit\n        return fmt.Errorf(\"archiver shutdown timeout after %v\", timeout)\n    }\n}\n```\n\n**Failure Scenario 1: Deadlock on Pending Jobs**\n\nIf an archiving job is stuck (e.g., blocked on `ArchiveJob()` line 137 waiting for metric data that never arrives):\n- `archivePending.Wait()` (line 231) blocks forever\n- `done` channel never closes\n- Timeout fires (line 242)\n- `shutdownCancel()` cancels context (line 245)\n- Worker receives `shutdownCtx.Done()` signal (line 115)\n- But if job is stuck reading from a channel that ALSO depends on the context, we have a mutual wait\n\n**Failure Scenario 2: Goroutine Leak**\n\nIf `Start()` was never called:\n- `workerDone` is nil (line 68 uninitialized)\n- `Shutdown()` tries to read `<-workerDone` (line 240 or 247)\n- **PANIC: send on nil channel** (reading from nil panics)\n\nCode at line 188-189 handles nil `archiveChannel` but **`workerDone` is never checked**:\n\n```go\nif archiveChannel == nil {                 // line 188: checked\n    cclog.Fatal(\"Cannot archive without archiving channel. Did you Start the archiver?\")\n}\n// BUT: no check for workerDone being nil\n```\n\n**Root Cause:** No validation that `Start()` was actually called before `Shutdown()`; WaitGroup.Wait() can block indefinitely if jobs never complete.\n\n---\n\n#### **ISSUE 5: SEVERE - Data Loss of Queued Archive Jobs on Timeout**\n\n**File/Line References:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:125-169`\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go:489`\n\n**Problem:**\nWhen shutdown timeout is exceeded, in-flight jobs are abandoned:\n\n```go\nfunc archivingWorker() {\n    for {\n        select {\n        case <-shutdownCtx.Done():         // line 115: context cancelled on timeout\n            cclog.Info(\"Archive worker received shutdown signal\")\n            return                         // line 117: EXITS, abandoning active job\n        // ... job processing ...\n        }\n    }\n}\n```\n\nOn timeout (server.go line 500, 60-second limit):\n```go\nselect {\ncase <-done:\n    cclog.Infof(\"Shutdown: metricstore + archiver completed (%v)\", time.Since(storeStart))\ncase <-time.After(60 * time.Second):  // line 500\n    cclog.Warnf(\"Shutdown deadline exceeded after %v, forcing exit\", time.Since(shutdownStart))\n    // Server exits here - any job being processed in ArchiveJob() is lost\n}\n```\n\nA job that's 50 seconds into a 70-second archive operation will:\n1. Have `archivePending.Done()` **never called** (not even in error path on context cancel)\n2. Never be marked as `MonitoringStatusArchivingFailed` (no error handling for context timeout)\n3. Remain in database as `MonitoringStatusRunning` or previous state\n\nThe job's metric data is **partially archived or not archived at all**, and the database state is inconsistent.\n\n**Root Cause:** Context cancellation during in-flight `ArchiveJob()` (line 137) doesn't trigger `archivePending.Done()` cleanup if context times out mid-operation.\n\n---\n\n#### **ISSUE 6: MODERATE - Missing archivePending.Done() in Timeout Path**\n\n**File/Line References:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:110-170`\n\n**Problem:**\nEvery code path that adds to `archivePending.Add(1)` (line 192) must call `Done()`. Missing calls:\n\n```go\nfunc archivingWorker() {\n    for {\n        select {\n        case <-shutdownCtx.Done():  // line 115 - TIMEOUT PATH\n            cclog.Info(\"Archive worker received shutdown signal\")\n            return                  // line 117: NO archivePending.Done() CALLED\n            \n        case job, ok := <-archiveChannel:\n            if !ok {\n                return              // line 122: NO Done() - but channel closed naturally\n            }\n            // Multiple Done() calls on error paths - CORRECT\n            if _, err := jobRepo.FetchMetadata(job); err {\n                archivePending.Done()  // line 131 - OK\n                continue\n            }\n            // ... more error paths with Done() ...\n        }\n    }\n}\n```\n\nWhen `shutdownCtx` is cancelled (line 245 in `Shutdown()`) while a job is being processed:\n- Line 115 fires\n- `archivingWorker()` exits (line 117)\n- **The job being processed has `archivePending.Add(1)` but never gets `Done()`**\n- `archivePending.Wait()` (line 231) hangs forever\n\nThis directly causes **ISSUE 4 (deadlock on Shutdown timeout)**.\n\n**Root Cause:** Context cancellation path doesn't decrement the pending counter for the job that was in-flight.\n\n---\n\n### **TASKMANAGER SUBSYSTEM ISSUES**\n\n#### **ISSUE 7: CRITICAL - Nil Scheduler Panic if Shutdown Called Without Start**\n\n**File/Line References:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/taskmanager/taskManager.go:52-57` (globals)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/taskmanager/taskManager.go:105-145` (Start)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/taskmanager/taskManager.go:165-169` (Shutdown)\n\n**Problem:**\nTaskManager stores a scheduler in a package-level variable with zero value:\n\n```go\nvar (\n    s       gocron.Scheduler          // line 53: ZERO VALUE (nil interface{})\n    jobRepo *repository.JobRepository // line 54: NIL\n    Keys    CronFrequency             // line 56: ZERO STRUCT\n)\n\nfunc Start(cronCfg, archiveConfig json.RawMessage) {  // line 105\n    var err error\n    jobRepo = repository.GetJobRepository()\n    s, err = gocron.NewScheduler()    // line 108: initializes global s\n    if err != nil {\n        cclog.Abortf(\"Taskmanager Start: Could not create gocron scheduler.\\nError: %s\\n\", err.Error())\n    }\n    // ... register jobs ...\n    s.Start()                         // line 144\n}\n\nfunc Shutdown() {  // line 165\n    if s != nil {  // line 166: CHECK FOR NIL\n        s.Shutdown()\n    }\n}\n```\n\n**Failure Scenario:**\n\n1. If `Start()` is never called, `s` remains nil\n2. If `Shutdown()` is called, it safely checks `s != nil` (line 166) - **THIS CHECK WORKS**\n3. **BUT** if `Start()` is called, fails at line 110 (context cancelled or config error), and then `Shutdown()` is called, the nil check passes but `s` is partially initialized (could be in an invalid state)\n\nMore critically: **If `Start()` is called twice** (no re-initialization guard):\n\n```go\n// First Start()\ns, err = gocron.NewScheduler()  // line 108: creates scheduler S1\nRegisterFootprintWorker()        // line 136: adds job to S1\ns.Start()                        // line 144: S1 starts\n\n// Code attempts to re-initialize (e.g., hot reload config)\n// Second Start()\ns, err = gocron.NewScheduler()  // line 108: OVERWRITES with S2\n// ... registers jobs to S2 ...\ns.Start()                        // line 144: S2 starts, but S1 is still running!\n```\n\nResult: **Two schedulers running concurrently**, each with separate job lists, leading to duplicate job executions or resource exhaustion.\n\n**Root Cause:** No `sync.Once` guard on `Start()`; global `s` can be reinitialized.\n\n---\n\n#### **ISSUE 8: SEVERE - Resource Leak on Failed Start (Aborted Process)**\n\n**File/Line References:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/taskmanager/taskManager.go:108-111`\n\n**Problem:**\nIf scheduler creation fails:\n\n```go\ns, err = gocron.NewScheduler()  // line 108\nif err != nil {\n    cclog.Abortf(\"Taskmanager Start: Could not create gocron scheduler.\\nError: %s\\n\", err.Error())  // line 110\n}\n```\n\n`cclog.Abortf()` **kills the entire process** without cleanup:\n- Active archiver goroutine is left running\n- Archiver has queued jobs in `archiveChannel` (if it was started before taskmanager)\n- HTTP server goroutine is still running\n- No graceful shutdown of other subsystems\n\nThe process dies abruptly, potentially leaving:\n- Incomplete database transactions\n- Stale lock files\n- Queued archive jobs never persisted to database\n\n**Root Cause:** `Abort()` call prevents graceful shutdown sequence; should return error instead.\n\n---\n\n#### **ISSUE 9: MODERATE - Missing Validation of Start Preconditions**\n\n**File/Line References:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/taskmanager/taskManager.go:105-145`\n\n**Problem:**\n`Start()` depends on global state being initialized:\n\n```go\nfunc Start(cronCfg, archiveConfig json.RawMessage) {  // line 105\n    var err error\n    jobRepo = repository.GetJobRepository()           // line 107: assumes config.Keys is set\n    \n    dec := json.NewDecoder(bytes.NewReader(cronCfg))  // line 117: uses cronCfg\n    // ...\n    if config.Keys.StopJobsExceedingWalltime > 0 { // line 113: reads global config\n        RegisterStopJobsExceedTime()\n    }\n```\n\nIf `config.Init()` was never called (in main.go line 107), `config.Keys` is zero-valued and all config checks return incorrect defaults. No validation ensures prerequisites are met before starting taskmanager.\n\n---\n\n### **INTEGRATION AND SHUTDOWN SEQUENCING ISSUES**\n\n#### **ISSUE 10: SEVERE - No Archiver Shutdown in main.go Signal Handler**\n\n**File/Line References:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go:402-418`\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go:455-505`\n\n**Problem:**\nThe signal handler in main.go calls `taskmanager.Shutdown()` (line 417) but **NOT** `archiver.Shutdown()`:\n\n```go\n// main.go, signal handler (line 406-418)\ngo func() {\n    defer wg.Done()\n    select {\n    case <-sigs:\n        cclog.Info(\"Shutdown signal received\")\n    case <-ctx.Done():\n    }\n    \n    runtime.SystemdNotify(false, \"Shutting down ...\")\n    srv.Shutdown(ctx)              // line 415: HTTP server\n    util.FsWatcherShutdown()        // line 416: file watcher\n    taskmanager.Shutdown()          // line 417: task manager\n    // MISSING: archiver.Shutdown() HERE\n}()\n```\n\n**BUT** `server.Shutdown()` DOES call `archiver.Shutdown()` (server.go line 489):\n\n```go\n// server.go, Server.Shutdown() method (line 488-492)\nwg.Go(func() {\n    if err := archiver.Shutdown(60 * time.Second); err != nil {\n        cclog.Warnf(\"Archiver shutdown: %v\", err)\n    }\n})\n```\n\n**Race Condition:**\n1. Signal handler calls `srv.Shutdown(ctx)` (main.go line 415)\n2. Server.Shutdown() calls `archiver.Shutdown()` (server.go line 489)\n3. But signal handler returns and `wg.Done()` is called (main.go line 407)\n4. If `srv.Shutdown()` completes before `archiver.Shutdown()` completes, the server goroutine may exit\n5. Then main waits on `wg` to complete (main.go line 430), but if archiver is still shutting down, the timing is off\n\n**More critically:** The `server.Shutdown()` is passed `ctx`, but at line 466:\n\n```go\nshutdownCtx, cancel := context.WithTimeout(ctx, 60*time.Second)  // line 466\n```\n\nA **new 60-second timeout** is created. But `archiver.Shutdown()` at line 489 also gets a 60-second timeout **independently**. If both hit their timeouts, the process can be stuck for 120 seconds.\n\n**Root Cause:** Archiver shutdown is buried inside `Server.Shutdown()` instead of being in the main signal handler alongside other subsystems.\n\n---\n\n#### **ISSUE 11: MODERATE - No Timeout on taskmanager.Shutdown()**\n\n**File/Line References:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go:417`\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/taskmanager/taskManager.go:165-169`\n\n**Problem:**\n`taskmanager.Shutdown()` has no timeout mechanism:\n\n```go\nfunc Shutdown() {  // line 165 - NO timeout parameter\n    if s != nil {\n        s.Shutdown()  // line 167: no timeout, blocks until scheduler fully stopped\n    }\n}\n```\n\nIf a cron job hangs (e.g., database deadlock in `RegisterFootprintWorker` at line 147), `s.Shutdown()` will block indefinitely. The signal handler in main.go (line 417) will hang, and the process won't exit.\n\nContrast with `archiver.Shutdown(timeout)` which takes a timeout parameter.\n\n**Root Cause:** TaskManager's shutdown doesn't support graceful timeout like archiver does.\n\n---\n\n### **SUMMARY TABLE**\n\n| Issue | Severity | Component | Impact | File:Line |\n|-------|----------|-----------|--------|-----------|\n| Nil channel send race | CRITICAL | Archiver | Send panic if TriggerArchiving() called during Start() | archiveWorker.go:87-92,193 |\n| Double-close on reinitialization | CRITICAL | Archiver | Panic on Shutdown if Start called twice | archiveWorker.go:85-92,226 |\n| Double-close on shutdown | CRITICAL | Archiver | Panic if channels already closed | archiveWorker.go:110-122,226 |\n| Nil workerDone panic | CRITICAL | Archiver | Panic on Shutdown if Start never called | archiveWorker.go:68,240,247 |\n| Data loss on timeout | SEVERE | Archiver | Incomplete archives, inconsistent DB state | archiveWorker.go:115-117,137 |\n| Missing Done() on context cancel | SEVERE | Archiver | Deadlock in Shutdown waiting for pending jobs | archiveWorker.go:115-117,231 |\n| Double-scheduler leak | CRITICAL | TaskManager | Duplicate cron executions, resource waste | taskManager.go:108,144 |\n| Process abort on init failure | SEVERE | TaskManager | No graceful shutdown if scheduler creation fails | taskManager.go:110 |\n| Signal handler missing archiver | SEVERE | Integration | Archiver shutdown timing issues | main.go:417 |\n| No taskmanager timeout | MODERATE | TaskManager | Process can hang if cron job stalls | taskManager.go:167 |\n| Unvalidated preconditions | MODERATE | Both | Silent failures if initialization order violated | main.go:376-378 |"}],"totalDurationMs":121147,"totalTokens":52290,"totalToolUseCount":48,"usage":{"input_tokens":0,"cache_creation_input_tokens":334,"cache_read_input_tokens":45893,"output_tokens":6063,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":0,"ephemeral_5m_input_tokens":334},"inference_geo":"not_available","iterations":[{"input_tokens":0,"output_tokens":6063,"cache_read_input_tokens":45893,"cache_creation_input_tokens":334,"cache_creation":{"ephemeral_5m_input_tokens":334,"ephemeral_1h_input_tokens":0},"type":"message"}],"speed":"standard"},"toolStats":{"readCount":27,"searchCount":0,"bashCount":21,"editFileCount":0,"linesAdded":0,"linesRemoved":0,"otherToolCount":0}},"sourceToolAssistantUUID":"cd24ed0b-aac8-4a0d-8469-af59a2c782fa","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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err == nil {\n201\t\t\t\tauthInstance.SessionMaxAge = d\n202\t\t\t}\n203\t\n204\t\t\tif authCfg == nil {\n205\t\t\t\treturn\n206\t\t\t}\n207\t\n208\t\t\tconfig.Validate(configSchema, *authCfg)\n209\t\t\tdec := json.NewDecoder(bytes.NewReader(*authCfg))\n210\t\t\tdec.DisallowUnknownFields()\n211\t\t\tif err := dec.Decode(&Keys); err != nil {\n212\t\t\t\tcclog.Errorf(\"error while decoding ldap config: %v\", err)\n213\t\t\t}\n214\t\n215\t\t\tif Keys.LdapConfig != nil {\n216\t\t\t\tldapAuth := &LdapAuthenticator{}\n217\t\t\t\tif err := ldapAuth.Init(); err != nil {\n218\t\t\t\t\tcclog.Warn(\"Error while initializing authentication -> ldapAuth init failed\")\n219\t\t\t\t} else {\n220\t\t\t\t\tauthInstance.LdapAuth = ldapAuth\n221\t\t\t\t\tauthInstance.authenticators = append(authInstance.authenticators, authInstance.LdapAuth)\n222\t\t\t\t}\n223\t\t\t} else {\n224\t\t\t\tcclog.Info(\"Missing LDAP configuration: No LDAP support!\")\n225\t\t\t}\n226\t\n227\t\t\tif Keys.JwtConfig != nil {\n228\t\t\t\tauthInstance.JwtAuth = &JWTAuthenticator{}\n229\t\t\t\tif err := authInstance.JwtAuth.Init(); err != nil {\n230\t\t\t\t\tcclog.Fatal(\"Error while initializing authentication -> jwtAuth init failed\")\n231\t\t\t\t}\n232\t\n233\t\t\t\tjwtSessionAuth := &JWTSessionAuthenticator{}\n234\t\t\t\tif err := jwtSessionAuth.Init(); err != nil {\n235\t\t\t\t\tcclog.Info(\"jwtSessionAuth init failed: No JWT login support!\")\n236\t\t\t\t} else {\n237\t\t\t\t\tauthInstance.authenticators = append(authInstance.authenticators, jwtSessionAuth)\n238\t\t\t\t}\n239\t\n240\t\t\t\tjwtCookieSessionAuth := &JWTCookieSessionAuthenticator{}\n241\t\t\t\tif err := jwtCookieSessionAuth.Init(); err != nil {\n242\t\t\t\t\tcclog.Info(\"jwtCookieSessionAuth init failed: No JWT cookie login support!\")\n243\t\t\t\t} else {\n244\t\t\t\t\tauthInstance.authenticators = append(authInstance.authenticators, jwtCookieSessionAuth)\n245\t\t\t\t}\n246\t\t\t} else {\n247\t\t\t\tcclog.Info(\"Missing JWT configuration: No JWT token support!\")\n248\t\t\t}\n249\t\n250\t\t\tauthInstance.LocalAuth = &LocalAuthenticator{}\n251\t\t\tif err := authInstance.LocalAuth.Init(); err != nil {\n252\t\t\t\tcclog.Fatal(\"Error while initializing authentication -> localAuth init failed\")\n253\t\t\t}\n254\t\t\tauthInstance.authenticators = append(authInstance.authenticators, authInstance.LocalAuth)\n255\t\t})\n256\t}\n257\t\n258\tfunc GetAuthInstance() *Authentication {\n259\t\tif authInstance == nil {\n260\t\t\tcclog.Fatal(\"Authentication module not initialized!\")\n261\t\t}\n262\t\n263\t\treturn authInstance\n264\t}\n265\t\n266\t// handleUserSync syncs or updates a user in the database based on configuration.\n267\t// This is used for LDAP, JWT and OIDC authentications when syncUserOnLogin or updateUserOnLogin is enabled.\n268\tfunc handleUserSync(user *schema.User, syncUserOnLogin, updateUserOnLogin bool) {\n269\t\tr := repository.GetUserRepository()"}]},"uuid":"6b0486ab-bc99-4969-9f92-b27283ec219c","timestamp":"2026-06-05T07:21:56.056Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/auth/auth.go","content":"\nfunc Init(authCfg *json.RawMessage) {\n\tinitOnce.Do(func() {\n\t\tauthInstance = &Authentication{}\n\n\t\t// Start background cleanup of rate limiters\n\t\tstartRateLimiterCleanup()\n\n\t\tsessKey := os.Getenv(\"SESSION_KEY\")\n\t\tif sessKey == \"\" {\n\t\t\tcclog.Fatal(\"environment variable 'SESSION_KEY' not set: refusing to start with an ephemeral session key. \" +\n\t\t\t\t\"Set SESSION_KEY in .env (base64-encoded 32 random bytes); a random key would invalidate all sessions on every restart \" +\n\t\t\t\t\"and prevent sessions from validating across replicas.\")\n\t\t}\n\t\tkeyBytes, err := base64.StdEncoding.DecodeString(sessKey)\n\t\tif err != nil {\n\t\t\tcclog.Fatal(\"Error while initializing authentication -> decoding session key failed\")\n\t\t}\n\t\tauthInstance.sessionStore = sessions.NewCookieStore(keyBytes)\n\n\t\tif d, err := time.ParseDuration(config.Keys.SessionMaxAge); err == nil {\n\t\t\tauthInstance.SessionMaxAge = d\n\t\t}\n\n\t\tif authCfg == nil {\n\t\t\treturn\n\t\t}\n\n\t\tconfig.Validate(configSchema, *authCfg)\n\t\tdec := json.NewDecoder(bytes.NewReader(*authCfg))\n\t\tdec.DisallowUnknownFields()\n\t\tif err := dec.Decode(&Keys); err != nil {\n\t\t\tcclog.Errorf(\"error while decoding ldap config: %v\", err)\n\t\t}\n\n\t\tif Keys.LdapConfig != nil {\n\t\t\tldapAuth := &LdapAuthenticator{}\n\t\t\tif err := ldapAuth.Init(); err != nil {\n\t\t\t\tcclog.Warn(\"Error while initializing authentication -> ldapAuth init failed\")\n\t\t\t} else {\n\t\t\t\tauthInstance.LdapAuth = ldapAuth\n\t\t\t\tauthInstance.authenticators = append(authInstance.authenticators, authInstance.LdapAuth)\n\t\t\t}\n\t\t} else {\n\t\t\tcclog.Info(\"Missing LDAP configuration: No LDAP support!\")\n\t\t}\n\n\t\tif Keys.JwtConfig != nil {\n\t\t\tauthInstance.JwtAuth = &JWTAuthenticator{}\n\t\t\tif err := authInstance.JwtAuth.Init(); err != nil {\n\t\t\t\tcclog.Fatal(\"Error while initializing authentication -> jwtAuth init failed\")\n\t\t\t}\n\n\t\t\tjwtSessionAuth := &JWTSessionAuthenticator{}\n\t\t\tif err := jwtSessionAuth.Init(); err != nil {\n\t\t\t\tcclog.Info(\"jwtSessionAuth init failed: No JWT login support!\")\n\t\t\t} else {\n\t\t\t\tauthInstance.authenticators = append(authInstance.authenticators, jwtSessionAuth)\n\t\t\t}\n\n\t\t\tjwtCookieSessionAuth := &JWTCookieSessionAuthenticator{}\n\t\t\tif err := jwtCookieSessionAuth.Init(); err != nil {\n\t\t\t\tcclog.Info(\"jwtCookieSessionAuth init failed: No JWT cookie login support!\")\n\t\t\t} else {\n\t\t\t\tauthInstance.authenticators = append(authInstance.authenticators, jwtCookieSessionAuth)\n\t\t\t}\n\t\t} else {\n\t\t\tcclog.Info(\"Missing JWT configuration: No JWT token support!\")\n\t\t}\n\n\t\tauthInstance.LocalAuth = &LocalAuthenticator{}\n\t\tif err := authInstance.LocalAuth.Init(); err != nil {\n\t\t\tcclog.Fatal(\"Error while initializing authentication -> localAuth init failed\")\n\t\t}\n\t\tauthInstance.authenticators = append(authInstance.authenticators, authInstance.LocalAuth)\n\t})\n}\n\nfunc GetAuthInstance() *Authentication {\n\tif authInstance == nil {\n\t\tcclog.Fatal(\"Authentication module not initialized!\")\n\t}\n\n\treturn authInstance\n}\n\n// handleUserSync syncs or updates a user in the database based on configuration.\n// This is used for LDAP, JWT and OIDC authentications when syncUserOnLogin or updateUserOnLogin is enabled.\nfunc handleUserSync(user *schema.User, syncUserOnLogin, updateUserOnLogin bool) {\n\tr := repository.GetUserRepository()","numLines":90,"startLine":180,"totalLines":650}},"sourceToolAssistantUUID":"6001509d-1860-4bb7-9a0a-eb7ebb0e7093","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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+{"parentUuid":"62146086-2f36-4e65-bcf9-9898443adefc","isSidechain":false,"promptId":"e03eec5c-111d-4cd6-a2ad-e4499d1dc6b1","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01KWiK5PG6ryUxxBRYHMRWKQ","type":"tool_result","content":"1\t// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n2\t// All rights reserved. This file is part of cc-backend.\n3\t// Use of this source code is governed by a MIT-style\n4\t// license that can be found in the LICENSE file.\n5\t\n6\t// Package archiver provides asynchronous job archiving functionality for ClusterCockpit.\n7\t//\n8\t// The archiver runs a background worker goroutine that processes job archiving requests\n9\t// from a buffered channel. When jobs complete, their metric data is archived from the\n10\t// metric store to the configured archive backend (filesystem, S3, etc.).\n11\t//\n12\t// # Architecture\n13\t//\n14\t// The archiver uses a producer-consumer pattern:\n15\t//   - Producer: TriggerArchiving() sends jobs to archiveChannel\n16\t//   - Consumer: archivingWorker() processes jobs from the channel\n17\t//   - Coordination: sync.WaitGroup tracks pending archive operations\n18\t//\n19\t// # Lifecycle\n20\t//\n21\t//  1. Start(repo, ctx) - Initialize worker with context for cancellation\n22\t//  2. TriggerArchiving(job) - Queue job for archiving (called when job stops)\n23\t//  3. archivingWorker() - Background goroutine processes jobs\n24\t//  4. Shutdown(timeout) - Graceful shutdown with timeout\n25\t//\n26\t// # Graceful Shutdown\n27\t//\n28\t// The archiver supports graceful shutdown with configurable timeout:\n29\t//   - Closes channel to reject new jobs\n30\t//   - Waits for pending jobs to complete (up to timeout)\n31\t//   - Cancels context if timeout exceeded\n32\t//   - Ensures worker goroutine exits cleanly\n33\t//\n34\t// # Example Usage\n35\t//\n36\t//\t// Initialize archiver\n37\t//\tctx, cancel := context.WithCancel(context.Background())\n38\t//\tdefer cancel()\n39\t//\tarchiver.Start(jobRepository, ctx)\n40\t//\n41\t//\t// Trigger archiving when job completes\n42\t//\tarchiver.TriggerArchiving(job)\n43\t//\n44\t//\t// Graceful shutdown with 10 second timeout\n45\t//\tif err := archiver.Shutdown(10 * time.Second); err != nil {\n46\t//\t    log.Printf(\"Archiver shutdown timeout: %v\", err)\n47\t//\t}\n48\tpackage archiver\n49\t\n50\timport (\n51\t\t\"context\"\n52\t\t\"fmt\"\n53\t\t\"sync\"\n54\t\t\"time\"\n55\t\n56\t\t\"github.com/ClusterCockpit/cc-backend/internal/repository\"\n57\t\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n58\t\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n59\t\tsq \"github.com/Masterminds/squirrel\"\n60\t)\n61\t\n62\tvar (\n63\t\tarchivePending sync.WaitGroup\n64\t\tarchiveChannel chan *schema.Job\n65\t\tjobRepo        *repository.JobRepository\n66\t\tshutdownCtx    context.Context\n67\t\tshutdownCancel context.CancelFunc\n68\t\tworkerDone     chan struct{}\n69\t)\n70\t\n71\t// Start initializes the archiver and starts the background worker goroutine.\n72\t//\n73\t// The archiver processes job archiving requests asynchronously via a buffered channel.\n74\t// Jobs are sent to the channel using TriggerArchiving() and processed by the worker.\n75\t//\n76\t// Parameters:\n77\t//   - r: JobRepository instance for database operations\n78\t//   - ctx: Context for cancellation (shutdown signal propagation)\n79\t//\n80\t// The worker goroutine will run until:\n81\t//   - ctx is cancelled (via parent shutdown)\n82\t//   - archiveChannel is closed (via Shutdown())\n83\t//\n84\t// Must be called before TriggerArchiving(). Safe to call only once.\n85\tfunc Start(r *repository.JobRepository, ctx context.Context) {\n86\t\tshutdownCtx, shutdownCancel = context.WithCancel(ctx)\n87\t\tarchiveChannel = make(chan *schema.Job, 128)\n88\t\tworkerDone = make(chan struct{})\n89\t\tjobRepo = r\n90\t\n91\t\tgo archivingWorker()\n92\t}\n93\t\n94\t// archivingWorker is the background goroutine that processes job archiving requests.\n95\t//\n96\t// The worker loop:\n97\t//  1. Blocks waiting for jobs on archiveChannel or shutdown signal\n98\t//  2. Fetches job metadata from repository\n99\t//  3. Archives job data to configured backend (calls ArchiveJob)\n100\t//  4. Updates job footprint and energy metrics in database\n101\t//  5. Marks job as successfully archived\n102\t//  6. Calls job stop hooks\n103\t//\n104\t// The worker exits when:\n105\t//   - shutdownCtx is cancelled (timeout during shutdown)\n106\t//   - archiveChannel is closed (normal shutdown)\n107\t//\n108\t// Errors during archiving are logged and the job is marked as failed,\n109\t// but the worker continues processing other jobs.\n110\tfunc archivingWorker() {\n111\t\tdefer close(workerDone)\n112\t\n113\t\tfor {\n114\t\t\tselect {\n115\t\t\tcase <-shutdownCtx.Done():\n116\t\t\t\tcclog.Info(\"Archive worker received shutdown signal\")\n117\t\t\t\treturn\n118\t\n119\t\t\tcase job, ok := <-archiveChannel:\n120\t\t\t\tif !ok {\n121\t\t\t\t\tcclog.Info(\"Archive channel closed, worker exiting\")\n122\t\t\t\t\treturn\n123\t\t\t\t}\n124\t\n125\t\t\t\tstart := time.Now()\n126\t\t\t\t// not using meta data, called to load JobMeta into Cache?\n127\t\t\t\t// will fail if job meta not in repository\n128\t\t\t\tif _, err := jobRepo.FetchMetadata(job); err != nil {\n129\t\t\t\t\tcclog.Errorf(\"archiving job (dbid: %d) failed at check metadata step: %s\", *job.ID, err.Error())\n130\t\t\t\t\tjobRepo.UpdateMonitoringStatus(*job.ID, schema.MonitoringStatusArchivingFailed)\n131\t\t\t\t\tarchivePending.Done()\n132\t\t\t\t\tcontinue\n133\t\t\t\t}\n134\t\n135\t\t\t\t// ArchiveJob will fetch all the data from a MetricDataRepository and push into configured archive backend\n136\t\t\t\t// Use shutdown context to allow cancellation\n137\t\t\t\tjobMeta, err := ArchiveJob(job, shutdownCtx)\n138\t\t\t\tif err != nil {\n139\t\t\t\t\tcclog.Errorf(\"archiving job (dbid: %d) failed at archiving job step: %s\", *job.ID, err.Error())\n140\t\t\t\t\tjobRepo.UpdateMonitoringStatus(*job.ID, schema.MonitoringStatusArchivingFailed)\n141\t\t\t\t\tarchivePending.Done()\n142\t\t\t\t\tcontinue\n143\t\t\t\t}\n144\t\n145\t\t\t\tstmt := sq.Update(\"job\").Where(\"job.id = ?\", job.ID)\n146\t\n147\t\t\t\tif stmt, err = jobRepo.UpdateFootprint(stmt, jobMeta); err != nil {\n148\t\t\t\t\tcclog.Errorf(\"archiving job (dbid: %d) failed at update Footprint step: %s\", *job.ID, err.Error())\n149\t\t\t\t\tarchivePending.Done()\n150\t\t\t\t\tcontinue\n151\t\t\t\t}\n152\t\t\t\tif stmt, err = jobRepo.UpdateEnergy(stmt, jobMeta); err != nil {\n153\t\t\t\t\tcclog.Errorf(\"archiving job (dbid: %d) failed at update Energy step: %s\", *job.ID, err.Error())\n154\t\t\t\t\tarchivePending.Done()\n155\t\t\t\t\tcontinue\n156\t\t\t\t}\n157\t\t\t\t// Update the jobs database entry one last time:\n158\t\t\t\tstmt = jobRepo.MarkArchived(stmt, schema.MonitoringStatusArchivingSuccessful)\n159\t\t\t\tif err := jobRepo.Execute(stmt); err != nil {\n160\t\t\t\t\tcclog.Errorf(\"archiving job (dbid: %d) failed at db execute: %s\", *job.ID, err.Error())\n161\t\t\t\t\tarchivePending.Done()\n162\t\t\t\t\tcontinue\n163\t\t\t\t}\n164\t\t\t\tcclog.Debugf(\"archiving job %d took %s\", job.JobID, time.Since(start))\n165\t\t\t\tcclog.Infof(\"archiving job (dbid: %d) successful\", *job.ID)\n166\t\n167\t\t\t\trepository.CallJobStopHooks(job)\n168\t\t\t\tarchivePending.Done()\n169\t\t\t}\n170\t\t}\n171\t}\n172\t\n173\t// TriggerArchiving queues a job for asynchronous archiving.\n174\t//\n175\t// This function should be called when a job completes (stops) to archive its\n176\t// metric data from the metric store to the configured archive backend.\n177\t//\n178\t// The function:\n179\t//  1. Increments the pending job counter (WaitGroup)\n180\t//  2. Sends the job to the archiving channel (buffered, capacity 128)\n181\t//  3. Returns immediately (non-blocking unless channel is full)\n182\t//\n183\t// The actual archiving is performed asynchronously by the worker goroutine.\n184\t// Upon completion, the worker will decrement the pending counter.\n185\t//\n186\t// Panics if Start() has not been called first.\n187\tfunc TriggerArchiving(job *schema.Job) {\n188\t\tif archiveChannel == nil {\n189\t\t\tcclog.Fatal(\"Cannot archive without archiving channel. Did you Start the archiver?\")\n190\t\t}\n191\t\n192\t\tarchivePending.Add(1)\n193\t\tarchiveChannel <- job\n194\t}\n195\t\n196\t// Shutdown performs a graceful shutdown of the archiver with a configurable timeout.\n197\t//\n198\t// The shutdown process:\n199\t//  1. Closes archiveChannel - no new jobs will be accepted\n200\t//  2. Waits for pending jobs to complete (up to timeout duration)\n201\t//  3. If timeout is exceeded:\n202\t//     - Cancels shutdownCtx to interrupt ongoing ArchiveJob operations\n203\t//     - Returns error indicating timeout\n204\t//  4. Waits for worker goroutine to exit cleanly\n205\t//\n206\t// Parameters:\n207\t//   - timeout: Maximum duration to wait for pending jobs to complete\n208\t//     (recommended: 10-30 seconds for production)\n209\t//\n210\t// Returns:\n211\t//   - nil if all jobs completed within timeout\n212\t//   - error if timeout was exceeded (some jobs may not have been archived)\n213\t//\n214\t// Jobs that don't complete within the timeout will be marked as failed.\n215\t// The function always ensures the worker goroutine exits before returning.\n216\t//\n217\t// Example:\n218\t//\n219\t//\tif err := archiver.Shutdown(10 * time.Second); err != nil {\n220\t//\t    log.Printf(\"Some jobs did not complete: %v\", err)\n221\t//\t}\n222\tfunc Shutdown(timeout time.Duration) error {\n223\t\tcclog.Info(\"Initiating archiver shutdown...\")\n224\t\n225\t\t// Close channel to signal no more jobs will be accepted\n226\t\tclose(archiveChannel)\n227\t\n228\t\t// Create a channel to signal when all jobs are done\n229\t\tdone := make(chan struct{})\n230\t\tgo func() {\n231\t\t\tarchivePending.Wait()\n232\t\t\tclose(done)\n233\t\t}()\n234\t\n235\t\t// Wait for jobs to complete or timeout\n236\t\tselect {\n237\t\tcase <-done:\n238\t\t\tcclog.Info(\"All archive jobs completed successfully\")\n239\t\t\t// Wait for worker to exit\n240\t\t\t<-workerDone\n241\t\t\treturn nil\n242\t\tcase <-time.After(timeout):\n243\t\t\tcclog.Warn(\"Archiver shutdown timeout exceeded, cancelling remaining operations\")\n244\t\t\t// Cancel any ongoing operations\n245\t\t\tshutdownCancel()\n246\t\t\t// Wait for worker to exit\n247\t\t\t<-workerDone\n248\t\t\treturn fmt.Errorf(\"archiver shutdown timeout after %v\", timeout)\n249\t\t}\n250\t}\n251\t"}]},"uuid":"49fd849d-3efd-4d0c-9db0-61ad79766d13","timestamp":"2026-06-05T07:21:56.261Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go","content":"// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n// All rights reserved. This file is part of cc-backend.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\n// Package archiver provides asynchronous job archiving functionality for ClusterCockpit.\n//\n// The archiver runs a background worker goroutine that processes job archiving requests\n// from a buffered channel. When jobs complete, their metric data is archived from the\n// metric store to the configured archive backend (filesystem, S3, etc.).\n//\n// # Architecture\n//\n// The archiver uses a producer-consumer pattern:\n//   - Producer: TriggerArchiving() sends jobs to archiveChannel\n//   - Consumer: archivingWorker() processes jobs from the channel\n//   - Coordination: sync.WaitGroup tracks pending archive operations\n//\n// # Lifecycle\n//\n//  1. Start(repo, ctx) - Initialize worker with context for cancellation\n//  2. TriggerArchiving(job) - Queue job for archiving (called when job stops)\n//  3. archivingWorker() - Background goroutine processes jobs\n//  4. Shutdown(timeout) - Graceful shutdown with timeout\n//\n// # Graceful Shutdown\n//\n// The archiver supports graceful shutdown with configurable timeout:\n//   - Closes channel to reject new jobs\n//   - Waits for pending jobs to complete (up to timeout)\n//   - Cancels context if timeout exceeded\n//   - Ensures worker goroutine exits cleanly\n//\n// # Example Usage\n//\n//\t// Initialize archiver\n//\tctx, cancel := context.WithCancel(context.Background())\n//\tdefer cancel()\n//\tarchiver.Start(jobRepository, ctx)\n//\n//\t// Trigger archiving when job completes\n//\tarchiver.TriggerArchiving(job)\n//\n//\t// Graceful shutdown with 10 second timeout\n//\tif err := archiver.Shutdown(10 * time.Second); err != nil {\n//\t    log.Printf(\"Archiver shutdown timeout: %v\", err)\n//\t}\npackage archiver\n\nimport (\n\t\"context\"\n\t\"fmt\"\n\t\"sync\"\n\t\"time\"\n\n\t\"github.com/ClusterCockpit/cc-backend/internal/repository\"\n\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n\tsq \"github.com/Masterminds/squirrel\"\n)\n\nvar (\n\tarchivePending sync.WaitGroup\n\tarchiveChannel chan *schema.Job\n\tjobRepo        *repository.JobRepository\n\tshutdownCtx    context.Context\n\tshutdownCancel context.CancelFunc\n\tworkerDone     chan struct{}\n)\n\n// Start initializes the archiver and starts the background worker goroutine.\n//\n// The archiver processes job archiving requests asynchronously via a buffered channel.\n// Jobs are sent to the channel using TriggerArchiving() and processed by the worker.\n//\n// Parameters:\n//   - r: JobRepository instance for database operations\n//   - ctx: Context for cancellation (shutdown signal propagation)\n//\n// The worker goroutine will run until:\n//   - ctx is cancelled (via parent shutdown)\n//   - archiveChannel is closed (via Shutdown())\n//\n// Must be called before TriggerArchiving(). Safe to call only once.\nfunc Start(r *repository.JobRepository, ctx context.Context) {\n\tshutdownCtx, shutdownCancel = context.WithCancel(ctx)\n\tarchiveChannel = make(chan *schema.Job, 128)\n\tworkerDone = make(chan struct{})\n\tjobRepo = r\n\n\tgo archivingWorker()\n}\n\n// archivingWorker is the background goroutine that processes job archiving requests.\n//\n// The worker loop:\n//  1. Blocks waiting for jobs on archiveChannel or shutdown signal\n//  2. Fetches job metadata from repository\n//  3. Archives job data to configured backend (calls ArchiveJob)\n//  4. Updates job footprint and energy metrics in database\n//  5. Marks job as successfully archived\n//  6. Calls job stop hooks\n//\n// The worker exits when:\n//   - shutdownCtx is cancelled (timeout during shutdown)\n//   - archiveChannel is closed (normal shutdown)\n//\n// Errors during archiving are logged and the job is marked as failed,\n// but the worker continues processing other jobs.\nfunc archivingWorker() {\n\tdefer close(workerDone)\n\n\tfor {\n\t\tselect {\n\t\tcase <-shutdownCtx.Done():\n\t\t\tcclog.Info(\"Archive worker received shutdown signal\")\n\t\t\treturn\n\n\t\tcase job, ok := <-archiveChannel:\n\t\t\tif !ok {\n\t\t\t\tcclog.Info(\"Archive channel closed, worker exiting\")\n\t\t\t\treturn\n\t\t\t}\n\n\t\t\tstart := time.Now()\n\t\t\t// not using meta data, called to load JobMeta into Cache?\n\t\t\t// will fail if job meta not in repository\n\t\t\tif _, err := jobRepo.FetchMetadata(job); err != nil {\n\t\t\t\tcclog.Errorf(\"archiving job (dbid: %d) failed at check metadata step: %s\", *job.ID, err.Error())\n\t\t\t\tjobRepo.UpdateMonitoringStatus(*job.ID, schema.MonitoringStatusArchivingFailed)\n\t\t\t\tarchivePending.Done()\n\t\t\t\tcontinue\n\t\t\t}\n\n\t\t\t// ArchiveJob will fetch all the data from a MetricDataRepository and push into configured archive backend\n\t\t\t// Use shutdown context to allow cancellation\n\t\t\tjobMeta, err := ArchiveJob(job, shutdownCtx)\n\t\t\tif err != nil {\n\t\t\t\tcclog.Errorf(\"archiving job (dbid: %d) failed at archiving job step: %s\", *job.ID, err.Error())\n\t\t\t\tjobRepo.UpdateMonitoringStatus(*job.ID, schema.MonitoringStatusArchivingFailed)\n\t\t\t\tarchivePending.Done()\n\t\t\t\tcontinue\n\t\t\t}\n\n\t\t\tstmt := sq.Update(\"job\").Where(\"job.id = ?\", job.ID)\n\n\t\t\tif stmt, err = jobRepo.UpdateFootprint(stmt, jobMeta); err != nil {\n\t\t\t\tcclog.Errorf(\"archiving job (dbid: %d) failed at update Footprint step: %s\", *job.ID, err.Error())\n\t\t\t\tarchivePending.Done()\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\tif stmt, err = jobRepo.UpdateEnergy(stmt, jobMeta); err != nil {\n\t\t\t\tcclog.Errorf(\"archiving job (dbid: %d) failed at update Energy step: %s\", *job.ID, err.Error())\n\t\t\t\tarchivePending.Done()\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\t// Update the jobs database entry one last time:\n\t\t\tstmt = jobRepo.MarkArchived(stmt, schema.MonitoringStatusArchivingSuccessful)\n\t\t\tif err := jobRepo.Execute(stmt); err != nil {\n\t\t\t\tcclog.Errorf(\"archiving job (dbid: %d) failed at db execute: %s\", *job.ID, err.Error())\n\t\t\t\tarchivePending.Done()\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\tcclog.Debugf(\"archiving job %d took %s\", job.JobID, time.Since(start))\n\t\t\tcclog.Infof(\"archiving job (dbid: %d) successful\", *job.ID)\n\n\t\t\trepository.CallJobStopHooks(job)\n\t\t\tarchivePending.Done()\n\t\t}\n\t}\n}\n\n// TriggerArchiving queues a job for asynchronous archiving.\n//\n// This function should be called when a job completes (stops) to archive its\n// metric data from the metric store to the configured archive backend.\n//\n// The function:\n//  1. Increments the pending job counter (WaitGroup)\n//  2. Sends the job to the archiving channel (buffered, capacity 128)\n//  3. Returns immediately (non-blocking unless channel is full)\n//\n// The actual archiving is performed asynchronously by the worker goroutine.\n// Upon completion, the worker will decrement the pending counter.\n//\n// Panics if Start() has not been called first.\nfunc TriggerArchiving(job *schema.Job) {\n\tif archiveChannel == nil {\n\t\tcclog.Fatal(\"Cannot archive without archiving channel. Did you Start the archiver?\")\n\t}\n\n\tarchivePending.Add(1)\n\tarchiveChannel <- job\n}\n\n// Shutdown performs a graceful shutdown of the archiver with a configurable timeout.\n//\n// The shutdown process:\n//  1. Closes archiveChannel - no new jobs will be accepted\n//  2. Waits for pending jobs to complete (up to timeout duration)\n//  3. If timeout is exceeded:\n//     - Cancels shutdownCtx to interrupt ongoing ArchiveJob operations\n//     - Returns error indicating timeout\n//  4. Waits for worker goroutine to exit cleanly\n//\n// Parameters:\n//   - timeout: Maximum duration to wait for pending jobs to complete\n//     (recommended: 10-30 seconds for production)\n//\n// Returns:\n//   - nil if all jobs completed within timeout\n//   - error if timeout was exceeded (some jobs may not have been archived)\n//\n// Jobs that don't complete within the timeout will be marked as failed.\n// The function always ensures the worker goroutine exits before returning.\n//\n// Example:\n//\n//\tif err := archiver.Shutdown(10 * time.Second); err != nil {\n//\t    log.Printf(\"Some jobs did not complete: %v\", err)\n//\t}\nfunc Shutdown(timeout time.Duration) error {\n\tcclog.Info(\"Initiating archiver shutdown...\")\n\n\t// Close channel to signal no more jobs will be accepted\n\tclose(archiveChannel)\n\n\t// Create a channel to signal when all jobs are done\n\tdone := make(chan struct{})\n\tgo func() {\n\t\tarchivePending.Wait()\n\t\tclose(done)\n\t}()\n\n\t// Wait for jobs to complete or timeout\n\tselect {\n\tcase <-done:\n\t\tcclog.Info(\"All archive jobs completed successfully\")\n\t\t// Wait for worker to exit\n\t\t<-workerDone\n\t\treturn nil\n\tcase <-time.After(timeout):\n\t\tcclog.Warn(\"Archiver shutdown timeout exceeded, cancelling remaining operations\")\n\t\t// Cancel any ongoing operations\n\t\tshutdownCancel()\n\t\t// Wait for worker to exit\n\t\t<-workerDone\n\t\treturn fmt.Errorf(\"archiver shutdown timeout after %v\", timeout)\n\t}\n}\n","numLines":251,"startLine":1,"totalLines":251}},"sourceToolAssistantUUID":"62146086-2f36-4e65-bcf9-9898443adefc","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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+{"parentUuid":"66027a84-f940-4867-bf9a-83bc75ec4478","isSidechain":false,"promptId":"e03eec5c-111d-4cd6-a2ad-e4499d1dc6b1","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01DHddVRVQHtmAgN1En6aQPa","type":"tool_result","content":"=== auth.Init call sites ===\ncmd/cc-backend/main.go:177:\t\t\tauth.Init(&cfg)\ncmd/cc-backend/main.go:180:\t\t\tauth.Init(nil)\ncmd/cc-backend/main.go:198:\t\tauthHandle := auth.GetAuthInstance()\ncmd/cc-backend/server.go:123:\tauthHandle := auth.GetAuthInstance()\ninternal/taskmanager/ldapSyncService.go:24:\tauth := auth.GetAuthInstance()\ninternal/api/rest.go:72:\t\tAuthentication:  auth.GetAuthInstance(),\n\n=== DisableAuthentication usages ===\ncmd/cc-backend/server.go:209:\tif !config.Keys.DisableAuthentication {\ncmd/cc-backend/server.go:248:\t\tif !config.Keys.DisableAuthentication {\ncmd/cc-backend/server.go:279:\t\t\tif !config.Keys.DisableAuthentication {\ncmd/cc-backend/server.go:289:\t\t\tif !config.Keys.DisableAuthentication {\ncmd/cc-backend/server.go:300:\t\tif !config.Keys.DisableAuthentication {\ncmd/cc-backend/server.go:311:\t\tif !config.Keys.DisableAuthentication {\ncmd/cc-backend/server.go:321:\t\tif !config.Keys.DisableAuthentication {\ncmd/cc-backend/main.go:171:\tif config.Keys.DisableAuthentication && (flagNewUser != \"\" || flagDelUser != \"\") {\ncmd/cc-backend/main.go:175:\tif !config.Keys.DisableAuthentication {\ninternal/config/config.go:32:\tDisableAuthentication bool `json:\"disable-authentication\"`","is_error":false}]},"uuid":"1ac85ca3-8224-4dc3-b92e-f8f2114af08a","timestamp":"2026-06-05T07:22:33.534Z","toolUseResult":{"stdout":"=== auth.Init call sites ===\ncmd/cc-backend/main.go:177:\t\t\tauth.Init(&cfg)\ncmd/cc-backend/main.go:180:\t\t\tauth.Init(nil)\ncmd/cc-backend/main.go:198:\t\tauthHandle := auth.GetAuthInstance()\ncmd/cc-backend/server.go:123:\tauthHandle := auth.GetAuthInstance()\ninternal/taskmanager/ldapSyncService.go:24:\tauth := auth.GetAuthInstance()\ninternal/api/rest.go:72:\t\tAuthentication:  auth.GetAuthInstance(),\n\n=== DisableAuthentication usages ===\ncmd/cc-backend/server.go:209:\tif !config.Keys.DisableAuthentication {\ncmd/cc-backend/server.go:248:\t\tif !config.Keys.DisableAuthentication {\ncmd/cc-backend/server.go:279:\t\t\tif !config.Keys.DisableAuthentication {\ncmd/cc-backend/server.go:289:\t\t\tif !config.Keys.DisableAuthentication {\ncmd/cc-backend/server.go:300:\t\tif !config.Keys.DisableAuthentication {\ncmd/cc-backend/server.go:311:\t\tif !config.Keys.DisableAuthentication {\ncmd/cc-backend/server.go:321:\t\tif !config.Keys.DisableAuthentication {\ncmd/cc-backend/main.go:171:\tif config.Keys.DisableAuthentication && (flagNewUser != \"\" || flagDelUser != \"\") {\ncmd/cc-backend/main.go:175:\tif !config.Keys.DisableAuthentication {\ninternal/config/config.go:32:\tDisableAuthentication bool `json:\"disable-authentication\"`","stderr":"","interrupted":false,"isImage":false,"noOutputExpected":false},"sourceToolAssistantUUID":"66027a84-f940-4867-bf9a-83bc75ec4478","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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+{"parentUuid":"77a3d703-e48a-49e9-a157-27e9cc1572c2","isSidechain":false,"promptId":"e03eec5c-111d-4cd6-a2ad-e4499d1dc6b1","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01QDLfT26kaQS1uAaw5QkLUv","type":"tool_result","content":"1\t// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n2\t// All rights reserved. This file is part of cc-backend.\n3\t// Use of this source code is governed by a MIT-style\n4\t// license that can be found in the LICENSE file.\n5\t\n6\t// This file implements ingestion of InfluxDB line-protocol metric data received\n7\t// over NATS. Each line encodes one metric sample with the following structure:\n8\t//\n9\t//\t<measurement>[,cluster=<c>][,hostname=<h>][,type=<t>][,type-id=<id>][,stype=<s>][,stype-id=<id>] value=<v> [<timestamp>]\n10\t//\n11\t// The measurement name identifies the metric (e.g. \"cpu_load\"). Tags provide\n12\t// routing information (cluster, host) and optional sub-device selectors (type,\n13\t// stype). Only one field is expected per line: \"value\".\n14\t//\n15\t// After decoding, each sample is:\n16\t//  1. Written to the in-memory store via ms.WriteToLevel.\n17\t//  2. If the checkpoint format is \"wal\", also forwarded to the WAL staging\n18\t//     goroutine via the WALMessages channel for durable write-ahead logging.\n19\tpackage metricstore\n20\t\n21\timport (\n22\t\t\"bytes\"\n23\t\t\"context\"\n24\t\t\"fmt\"\n25\t\t\"strings\"\n26\t\t\"sync\"\n27\t\t\"sync/atomic\"\n28\t\t\"time\"\n29\t\n30\t\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n31\t\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n32\t\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n33\t\t\"github.com/ClusterCockpit/cc-line-protocol/v2/lineprotocol\"\n34\t)\n35\t\n36\t// ReceiveNats subscribes to all configured NATS subjects and feeds incoming\n37\t// line-protocol messages into the MemoryStore.\n38\t//\n39\t// When workers > 1 a pool of goroutines drains a shared channel so that\n40\t// multiple messages can be decoded in parallel. With workers == 1 the NATS\n41\t// callback decodes inline (no channel overhead, lower latency).\n42\t//\n43\t// The function blocks until ctx is cancelled and all worker goroutines have\n44\t// finished. It returns nil when the NATS client is not configured; callers\n45\t// should treat that as a no-op rather than an error.\n46\tfunc ReceiveNats(ms *MemoryStore,\n47\t\tworkers int,\n48\t\tctx context.Context,\n49\t) error {\n50\t\tnc := nats.GetClient()\n51\t\n52\t\tif nc == nil {\n53\t\t\tcclog.Warn(\"NATS client not initialized\")\n54\t\t\treturn nil\n55\t\t}\n56\t\n57\t\tvar wg sync.WaitGroup\n58\t\tmsgs := make(chan []byte, max(workers*256, 8192))\n59\t\n60\t\tfor _, sc := range *Keys.Subscriptions {\n61\t\t\tclusterTag := sc.ClusterTag\n62\t\t\tif workers > 1 {\n63\t\t\t\twg.Add(workers)\n64\t\n65\t\t\t\tfor range workers {\n66\t\t\t\t\tgo func() {\n67\t\t\t\t\t\tdefer wg.Done()\n68\t\t\t\t\t\tfor m := range msgs {\n69\t\t\t\t\t\t\tdec := lineprotocol.NewDecoderWithBytes(m)\n70\t\t\t\t\t\t\tif err := DecodeLine(dec, ms, clusterTag); err != nil {\n71\t\t\t\t\t\t\t\tcclog.Errorf(\"error: %s\", err.Error())\n72\t\t\t\t\t\t\t}\n73\t\t\t\t\t\t}\n74\t\t\t\t\t}()\n75\t\t\t\t}\n76\t\n77\t\t\t\tnc.Subscribe(sc.SubscribeTo, func(subject string, data []byte) {\n78\t\t\t\t\tselect {\n79\t\t\t\t\tcase msgs <- data:\n80\t\t\t\t\tcase <-ctx.Done():\n81\t\t\t\t\t}\n82\t\t\t\t})\n83\t\t\t} else {\n84\t\t\t\tnc.Subscribe(sc.SubscribeTo, func(subject string, data []byte) {\n85\t\t\t\t\tdec := lineprotocol.NewDecoderWithBytes(data)\n86\t\t\t\t\tif err := DecodeLine(dec, ms, clusterTag); err != nil {\n87\t\t\t\t\t\tcclog.Errorf(\"error: %s\", err.Error())\n88\t\t\t\t\t}\n89\t\t\t\t})\n90\t\t\t}\n91\t\t\tcclog.Infof(\"NATS subscription to '%s' established\", sc.SubscribeTo)\n92\t\t}\n93\t\n94\t\tgo func() {\n95\t\t\t<-ctx.Done()\n96\t\t\tclose(msgs)\n97\t\t}()\n98\t\n99\t\twg.Wait()\n100\t\n101\t\treturn nil\n102\t}\n103\t\n104\t// reorder prepends prefix to buf in-place when buf has enough spare capacity,\n105\t// avoiding an allocation. Falls back to a regular append otherwise.\n106\t//\n107\t// It is used to assemble the \"type<type-id>\" and \"stype<stype-id>\" selector\n108\t// strings when the type tag arrives before the type-id tag in the line, so the\n109\t// two byte slices need to be concatenated in tag-declaration order regardless\n110\t// of wire order.\n111\tfunc reorder(buf, prefix []byte) []byte {\n112\t\tn := len(prefix)\n113\t\tm := len(buf)\n114\t\tif cap(buf) < m+n {\n115\t\t\treturn append(prefix[:n:n], buf...)\n116\t\t} else {\n117\t\t\tbuf = buf[:n+m]\n118\t\t\tfor i := m - 1; i >= 0; i-- {\n119\t\t\t\tbuf[i+n] = buf[i]\n120\t\t\t}\n121\t\t\tfor i := range n {\n122\t\t\t\tbuf[i] = prefix[i]\n123\t\t\t}\n124\t\t\treturn buf\n125\t\t}\n126\t}\n127\t\n128\t// walDropped counts WAL messages dropped due to a full channel.\n129\t// Logged periodically; not critical since binary snapshots capture the data.\n130\tvar walDropped atomic.Int64"}]},"uuid":"1a54b78c-e4c0-4bcd-ae41-c7c8f973cd59","timestamp":"2026-06-05T07:22:34.385Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/lineprotocol.go","content":"// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n// All rights reserved. This file is part of cc-backend.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\n// This file implements ingestion of InfluxDB line-protocol metric data received\n// over NATS. Each line encodes one metric sample with the following structure:\n//\n//\t<measurement>[,cluster=<c>][,hostname=<h>][,type=<t>][,type-id=<id>][,stype=<s>][,stype-id=<id>] value=<v> [<timestamp>]\n//\n// The measurement name identifies the metric (e.g. \"cpu_load\"). Tags provide\n// routing information (cluster, host) and optional sub-device selectors (type,\n// stype). Only one field is expected per line: \"value\".\n//\n// After decoding, each sample is:\n//  1. Written to the in-memory store via ms.WriteToLevel.\n//  2. If the checkpoint format is \"wal\", also forwarded to the WAL staging\n//     goroutine via the WALMessages channel for durable write-ahead logging.\npackage metricstore\n\nimport (\n\t\"bytes\"\n\t\"context\"\n\t\"fmt\"\n\t\"strings\"\n\t\"sync\"\n\t\"sync/atomic\"\n\t\"time\"\n\n\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n\t\"github.com/ClusterCockpit/cc-line-protocol/v2/lineprotocol\"\n)\n\n// ReceiveNats subscribes to all configured NATS subjects and feeds incoming\n// line-protocol messages into the MemoryStore.\n//\n// When workers > 1 a pool of goroutines drains a shared channel so that\n// multiple messages can be decoded in parallel. With workers == 1 the NATS\n// callback decodes inline (no channel overhead, lower latency).\n//\n// The function blocks until ctx is cancelled and all worker goroutines have\n// finished. It returns nil when the NATS client is not configured; callers\n// should treat that as a no-op rather than an error.\nfunc ReceiveNats(ms *MemoryStore,\n\tworkers int,\n\tctx context.Context,\n) error {\n\tnc := nats.GetClient()\n\n\tif nc == nil {\n\t\tcclog.Warn(\"NATS client not initialized\")\n\t\treturn nil\n\t}\n\n\tvar wg sync.WaitGroup\n\tmsgs := make(chan []byte, max(workers*256, 8192))\n\n\tfor _, sc := range *Keys.Subscriptions {\n\t\tclusterTag := sc.ClusterTag\n\t\tif workers > 1 {\n\t\t\twg.Add(workers)\n\n\t\t\tfor range workers {\n\t\t\t\tgo func() {\n\t\t\t\t\tdefer wg.Done()\n\t\t\t\t\tfor m := range msgs {\n\t\t\t\t\t\tdec := lineprotocol.NewDecoderWithBytes(m)\n\t\t\t\t\t\tif err := DecodeLine(dec, ms, clusterTag); err != nil {\n\t\t\t\t\t\t\tcclog.Errorf(\"error: %s\", err.Error())\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}()\n\t\t\t}\n\n\t\t\tnc.Subscribe(sc.SubscribeTo, func(subject string, data []byte) {\n\t\t\t\tselect {\n\t\t\t\tcase msgs <- data:\n\t\t\t\tcase <-ctx.Done():\n\t\t\t\t}\n\t\t\t})\n\t\t} else {\n\t\t\tnc.Subscribe(sc.SubscribeTo, func(subject string, data []byte) {\n\t\t\t\tdec := lineprotocol.NewDecoderWithBytes(data)\n\t\t\t\tif err := DecodeLine(dec, ms, clusterTag); err != nil {\n\t\t\t\t\tcclog.Errorf(\"error: %s\", err.Error())\n\t\t\t\t}\n\t\t\t})\n\t\t}\n\t\tcclog.Infof(\"NATS subscription to '%s' established\", sc.SubscribeTo)\n\t}\n\n\tgo func() {\n\t\t<-ctx.Done()\n\t\tclose(msgs)\n\t}()\n\n\twg.Wait()\n\n\treturn nil\n}\n\n// reorder prepends prefix to buf in-place when buf has enough spare capacity,\n// avoiding an allocation. Falls back to a regular append otherwise.\n//\n// It is used to assemble the \"type<type-id>\" and \"stype<stype-id>\" selector\n// strings when the type tag arrives before the type-id tag in the line, so the\n// two byte slices need to be concatenated in tag-declaration order regardless\n// of wire order.\nfunc reorder(buf, prefix []byte) []byte {\n\tn := len(prefix)\n\tm := len(buf)\n\tif cap(buf) < m+n {\n\t\treturn append(prefix[:n:n], buf...)\n\t} else {\n\t\tbuf = buf[:n+m]\n\t\tfor i := m - 1; i >= 0; i-- {\n\t\t\tbuf[i+n] = buf[i]\n\t\t}\n\t\tfor i := range n {\n\t\t\tbuf[i] = prefix[i]\n\t\t}\n\t\treturn buf\n\t}\n}\n\n// walDropped counts WAL messages dropped due to a full channel.\n// Logged periodically; not critical since binary snapshots capture the data.\nvar walDropped atomic.Int64","numLines":130,"startLine":1,"totalLines":402}},"sourceToolAssistantUUID":"77a3d703-e48a-49e9-a157-27e9cc1572c2","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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YdVLp2Zsy9E+qlZNiAuK8aocpA9+16zJzA435hX5VS994kp/cBlNT9Y3A3RooH9kqGQOsIkJcsTXs0VdTG09ge1JcaWpmcVsZO9P7UBVtaq6CGCIMfZ/zxwJnTpG5frkCnWcqu+ZVsUbdz/XTVccDrjteeQZl5cUbxwriOzUqyFKYJhLeRLjyHnxxmXLvgpu1xK1/C34jmJLU+EU0u0yRjq9HvsdMdmiMuIgwVuVzXyj2udAjCYq9q3uGFej1Kcwo4xNcmVAMFs2LHu+gn8CvVygpk69rlxoXFiAyBaBenDkhmVx44PtFoAbx+Wvthm1VsgTxOaj7+/mH3KB9AnIk8DWDsVz0Ll7hMXtWC7kVp1NU9mUTQpBu0dQmv95ZQ/PCN4c++bZyKxLNbrcaWDIbNl9qobf4urgsSQn42pRJ/u3uoCXvaTJ1CFDtrKTK8Gm5+fhc3bDtwFn5SJTvooW4ABy4Tz2r80oV6VEXEzg+1KylMoyD7OO6u6Na+8mIN3eR56PpwEnbEpVXnw7CGXhuU1hDUeu34m1HOjrmaXJ3JyOnx1K6GwX9+7/XhWFUwOfbFYziwWbAFqTYrivpxZB5bdodb6mQ+CZKa3A+0YN8N/HlYXZryw9T44L1AsjDg5GV2X6ilrgzxr5T5RKo/Gbb/jACPmcrycLUr8ra33OIfVpc4JI16s+53KamEfmh/jFjvtBfEiEN41i5k1b0fWuyClKD3vwkOjWVsJhfLOYuRc1ru3u6old4GThK+5Wz7gQUp1M0POvc3At/nVHFb5xeDZv3NCFnDYI4V9+3zGUuYUVVJ5xw9cEMhHd21RFh2UJxr6ezxHYMwkiIDRoo2N951oyRAdqOGBkDZV2qIqXcMT3WzQ1NenNbVRCe8wkrQMHMo2nHIM0+YQgHReW3R3tYmlaFZcJXPfzbZSIDC6LcXEpLbTANueQU89X1Ek0Tyc9KIjmilmRfKbm3QJhW0XEGq+sSAESxU3naMeXzf5iZfm5/sIaY+wttXr/LGWPHTioA1zCW+HFnWoG7LIuZREBXsf3Hce735QgOGg3GbwQNRjni09oaceW32zUDvn5b5+eS2rqvyApIesDFChsyzT4P97Ll27K0y0mM5uVpFVzZbNN8J1i/R0IRAiV16zeBjy6ckkua9NCIC4coAsHWT3foUY3+ST8aK3CyLfVb1BIaPDRDX+l+IRL1jp2PRxGBXziNszqxMre2yMvhbyN+fepL/H31kJc/GS2Zer0uGmbSECn0UZWOv+npGRDctJzQcycIkx7lVp5D1ssKwm2BFLNYe3l3V2DgW5cVsB0CNqtU7+PalVn+Gm6e08nYoPBHGc/lpgW0FpSCCPxUxFpiMamQYIkcraWU1h6D/OsFF77+JY6sLqGn3PJy4tM+xnpv/Te875GTgsLdAP637nGb6drEti/6ezoP9OmyBh5h/1WYJqC3lFseNdVJe3XQJDkmRsPp2omZVfm9bZMaGCPg16pRjZr8x3peDGHKNYMWce3fFXaovBpyJDAVcDI4LNAlEth/JlurshANyNRxi8u4Vd5PTlFE7WyxrQkPSH6NGk0MLu9ZfiWAxI6ItFIIbqTEVYz6ctjnJolTU0PQ5/algIdPuFitfTVCMtxB4ttL55k9c1hg/UHYrDUhPMAnU1+QNvfxZpkiThivUzi3VCtTurOqeQp5k8i76vXY0v39A8AR7JOXbwxu7gikNTtezPVE3JEWwaumSSR2nOwbrhPV6X366GZLSXOU2oMUmyIPm2s61kY44R4IC1n79ElN/3gNeirPaP4yS/nEsfLUoVgn6q/KuUBFJyrZK8u/Xr6IqzqF0g1lVnWGsuDw1OILvgSE2EJhxFdYPM9YyVOtpNVhhQruu4N50nuAV1VKhSQcokJP3k7pcTbFNQrg3CgwIivGIEUChoDLmWmlHHeLvcnGPhosKoRU+5Yr9roACOhq+Gut+IGmRh8of6NoiOysIUS9UReWxVG6WwYYihrTOR5HiJ7CMKh1DxAFVOxq8v5EOVjY4bPOCf0muSEkEdBUBOWA+4aKlSkpAh3B6Iz0LzuKjF24lr/id7eKA6RzqsCzW3vrWNsxKPKmFknJmZFqalk4LZpc4btINRpuaiFM3EpxjM72ipfZmEYE1ZprhdJHEe96BXDIWrM5WSxy1S7oqpNPXQNUEoYAqvwlie4P9yhhiPDbc2p7+AEZDLeYxwRDWN0s+IOgfuQzqQfBONmJPFqRu7F1XVxmNF3044K1tPwN+NvReIpuAVSA+1IalI9PSC5c74wOadhVWizV5xaYxNVUuDotoXcu1akxSFJ2X22DUEsK+naFUaNgmox0Y7K2AO1UC3xZqwfAaLmQ+KAgf3U64heTWzGzAyEBM1BRwvB3Uhkt5MKUYTfAoP2ZuI7/iiKlr6MJoFNZWbWqkCUe31r97GNyVVUPgNQLlKeU7lA5IuPn5tSsfC4ygIeOcHFfoylIuVQ0Wdpp/MLNVaib8Lxuh7500egQLrtM0BUAa7bkZ4WHZ/r4IFbK90d5eAIm8pGqXON6ziMAu6HMe+QM+rOdk0NkYL7VNcwOx04oLVEXx9MH4GZo+7+RkONm3BrTx99d3s4JMVaOKbKW+Bh/Y7cu33+7HVLyo+kcNJvTyMgXmt9EO3QZ75SCDQ4X2j0FP1tm1zKhglnkcCDM1JkT8N97KjhBids60pJt96gP4+A791RqYyMwDRcqOwDoWYZtTYhIzc5QGLX4/BTgc8XG7gbaMChtqzOugZ1MdBO/yKGWYmGrTyQZfatquM60rOKl6ZsoBCIxzvgTidMVzSzItmLlLY2nwUg+WcuQN7L9zil9o50L2JBsSsi7m3nqynMYCfLp0OtX2ibfcrTw65Hc41U73EzfwEhZVW1tE3CBpsVV1p2NVut67qv8A5SXlDXHqEJWZxYAM6GEl/DYQNsbiuVa4dSahJsjTwjT8To4pzJDm5h11ypMhThJnuEGU+s0IJZZmk47d1heUv3MBKkHTpsq/+boubDidfRs2Nrmymr0ftilESVt+t1+uJiw/RV+S4MhMAOPR8/W8QcsmmMq3fHkjrbLIGS88gCY1GfMrpbq+0X9z/jURGc+7GVYqbhQ8GpGx1o+0F+m/9OOWQbnQnW6O/XLJaYxvr/EPCEToS4NCbwXvGmP8AuQ6h//wHhmBFwqtYUUCZ+JW51AM934++LFcZvVqMeGCMA5wGH+abVBs7H16U/AAZphEAy7/CjQBzeuBwIgs8NhiYVVS0WAWO2Vt76ChQihBfB724sdkhySBL2swizKmXhw5VNGvBK6K3GgqCE/NKTN40nxZkcWGf9irP+Qm3XHZQnnAgnf9+l55dSPWLafczNF8Cl0MRcEOQb4izBFzjb3yLY6P+AK4Tvtx8dhjJwRHScfT7axUisNKwOkydooDb/f+lvJSSYGx6J5ieYSj5TSsMdIigQ7opbNShjB3uGiaoERrm5kKe1em4TpsXT3AO8nUjkAXvmfLj+UFKhOH8t3tciX/TOSI1COcbxo7HzQQVfI/nSVzUBka71ynZuI0Lo5sfSOpuGTKjYxDj2H97OVva0OiMxQ4V0FWA5orZQdwx7pVhoxDWCM7LonSAeNLMFrFUCsq+nEX9Lz7vltpbCpwUYVSTFoYPoZoVEfVdFINzXEOnoGzxWwe53ab945M43mHctgyPxN+yLjnngLBvbe4NGOjvIGJU7Aax7PH9ghjdG3VtSsiw2fLddw8873knoOCieQykk8VysSR102vgVW3wopUwKa4q/ULAspjV10kImPlgf/Dg7zr3vckeC4Rj6njaHbTYPCxxO+PRidsHeZE8NOURpNnWOKsGNFMqdtAQdZh9wbGtSsUQN412/BzmW9otwVwgc6BJl9hZfD+I81NYCuSGspp2yhhko5fQi2hli/DuzX+eeClsqcx7EX2p+iJVI1WWfGmZLB+gwp1XSM6tKpB3Tl7rSrPISmRuVtwwDvEpx1qaE4oyqbM0WlXP30Kwk2JBKqvpnrGqce3RAWrfeqeIx5R+fk56/iCF06Zj1AgfcMci1ziah+OtRA8rl6lHeEqPRZCCI4zcT/rhGtpmiZL5GyS9GKNfV6ZZ33zA2hHglukpFYhRLzrr6Oq2L941CWqRgYG9AlyugiqeZ3oeWxwOtQSxEuJHbF3M0IeNe3lHj4ff00M8sNrSwj9C3D+Wr+SCfIV1rFGlsOM1LrVv+GEBf7fnVR26Jk4JoNXXahI01Q88cfeNu/qWcG6EAa5HGVAejWCfgZRFIiUvXTUf4LHtbb2bnvIduI+DC1nxAy/l1p9ADGz/5WrEZFa5UpWwvohU7JFkkMSCmniq+NMf2wvC8VnGFEptJjKyV72uw9pYLZaNiVuQDW8+928bKAv6FT81g4tGqCHn0maxn3fNafFS4Zd05qN+1dFF7ktqMyW89aLolz7vaRPdq9DwEKj5GQNgZa6VUVNMaZ/qVg6gTkP3PNO3jNP9rhJI5jxt9aSgQTQTlZ7mXgEPDJmbib+BS2mD38Qg1nZfKRdn3V8MoOflWIsJe/TqpRqL2H1jVlIgi2WH9O0L+k5GJPAeSvGbfkRSG/GDHIXZkmQQIXHt8MQSN0CB3qftyxm1/d2pK9bo0FH5e/8XkO5sb9ZTk7yht7gRyz7saUqcuVm1ZoEwvWXfOznCny68EY9Ni+gV9hpckbdLrKKfH0excbmBWfbONfiuW3DrUyd3aXpjTPPrysHm5Q3HBMs58N6oqZ6NfqRfOd08NCmriPSSfRQdWRxBW+4MwLGA5OUnrC/hvRvcyuNYs+SgXE5o/pf8/sGn+bAgp2jCsBiyAgTgtV0Kl531UvZNyAViQ9K1lZOI4yNO80nt+aJaXBytO9h5KNW+QuFoO8xQpIFzP8cZIWS/aDu2T+9s4PYgEFtR+MuZwB3ON5w/OMk97PtFeb/TmN6v3jmKSf8oMHCGpaMYmdB+c5eL1B3nLxfd1x3czgXWm9BxB64hBkd6DxFUgAhuf4Wl+bS7ywEOcb31kGY/bVQo7mtNTxq+Fk9aATGylc+nVn1TBrEIaC1hOx5GcQiAw97sEOwq6lQz6W1uIPQjfq54K9MgRW5mCKU//xgNF7TNkPNnjdAh3xFzX9DxO13GCbmaQdo5tLshJA/4mYryjy2biCBxvPgDB6VSd6/6Uk9B/QuuERqo34BNZyvb3/+mP/bYA227EV4qfz6Lxt78OQP/mlbAObuD+poagUEZ13roJ82sxXpICbaY3Evyw8Rwg58VEuBxzECJrGrm2Cib7uO1Bu3V9eH+PBGwLdQv/dqEe9gJ4ee2bTga+sIfrXrMLT7RtAGttedbmjImjLKu8O4q5mzQJqVxPkUCAlZc3V/PYisn1t2a2sr7LwZYwxAxTEdvBbHOO5/ga3YQUFIB1t8ssbSEqJzq9HZzzw7UMhxfBKoF/gPlkyrGGVVBveigRlpE20jY3peYmyb/YUJ1rLzgVVtnWIrCE4gjSx6MQrQ7Q4BBX4rs3XiDBFbBbDjV5pzqQ8LOUcFh2/Us2OtTqaaNzl0Y7AwBfkCEHW7jPpAe2ZUqSiA8yW+lxE8zVqEIHglJ7WnZbXbseQMayIiLLtYM9Xrk/o4gLIhrb6pxolrPslHiv2fVeb8iAtGvVwGa2n398+1OuFLLEMoJ1bPxNr1/t1eigQVE8ZqhWl0UU0m+PCYaMfYEZscJMvEqgr/x9KcONk2zt2RTGdhawWDHaHHn9UD/AbuFgZ878rBPJpzZ2ZwmoMRaxNPth0nHEzA1EzpmH2eORJc6aEGK9vy7SWcmm/KmxlRifeDUkb62jjfF+x1hiVwxWvlYkBSQin6+IhjI9XmN7WW/KQ4Uy1gjoQYilutMQ8z8Sl/qznl2Xov6SAdlwkjUpqcU6vYgxznHUvolTtwU5+z3E/dOzRvoy+CZod0iBswFam0wfKxCkjkZIVIbH5cPWUc4iX0MrkPE5NdDmrRIZoK/nNPXQbuZ9iirhXqkQEAF6AChor7Dfq3Aigvohnn66wEKrj8xn84q+lylY2gmRZSAXUQZ0eJbsuyLcSEJtbwtXVt8isUA0Uobtum/F9BYFHVOYBCMWn8Fbc1PXAAEcRAVGuee6VUS/V5YCbOakTXVzkRCqDd+qP+FKeaAJTFptVeUuilrMvFXIppbfa9uhdYO0rg8i3ZLxdyiWW0PRO5/5NRtqYVZ2/4J7FSmcvmrUtxDQ9iMbb0yeP+YjMcSTr/0LeG6BvhIwuL9yVgGBln/AxfEc5bBrgRdZWK0AxtQcNwIu23Eo6Nx80b9sTGjMC6/GY6jvrAwE6SVKggW+ruH/Lt00nsguPw1hfblg5rV9QZZhpXodUJuCQYmekOnB01ekUxSv3DDW8fjNZYkxAPjN/7vWHemE1rYua32/dldPZ3noc1u83+mB5l5fU6bwXmSzl+Yb5KmKHlDpXuCv+R6wF3csQX17078SNhTbQQPOWyH8TKnsIXX1KAFGqp++KsSHl80ocAdvdzizBdSk2xHkOciyhDInxrTFAb/bzy8nnvzd3/xewMMmOlCwZjIiaNkSnk7sRKfF3Pglk1fsDqFscDoCUUnj6yPe97nEYHBW0Tq/sseF+EVXXhCfOpGMsEOtL1OanHE9LclvajLLkOhMxI2TdENHRitNPwToMb82AA1Ij9kAyDs3rIYG+pMgbb9hLqU1Fr8bLAu1UAU1c40gwWkk1IGDWRVLp9dVkghlBfx+LWJaBTGWQjcJ7NnGSosIT9Ikify0ovRVdJmOmwyWGyKzp6aMjhIWO8cJD6o8t9mNTF1iNCPJ7jjWShKSawMLeVxvfwFOawxOuMGOMknbnNYzffD7rE9DRa73YchIdMBbPp70o4vBGtAX0CSuO5RX5QUYGDA+DdQ82IiemHh4NPk/k4wu0ZPdJgvOd+MnR7BEA6/7pHW+1/Bz/OtSwufrutTmZ4CkkCPGwCuIuBlIWwbTKd7u/S2EvZVnRz+D6vbpIb29heIWnVwmuRssbHCPA/OKQ6WzqM58j7YARgHau0bRSYkZHU2fiXXZ9tQG1X1rWWHcgHTzpq9A8cishnNyT594ioQLDCxffW6En3f9QED8Iu6aiaDnDuEGQtZMjcDP99f6iANOOPRAskrFDdkPFES0c1m2JaH84nZOznVHqA+qI6yz2wj/adhexuDJe7ugh8XWNEPPUCc4FhRPPB/bdAP2l3RjZLnNXnGSym9Hr+cqCMaey5Oqm24aiLYakjDdOnsCVhWYpmLq99yxmqkoRkph141ArazP1p0p1/asbDuzLUML0XHUfrm+LcfloKX7+dHmW/qBPy+36NOcIbMpNAqUQh4PvSefa6mTTbUDbcNVVCUajFJcfoe+ztSemPjj2KDV3ec9AK/ZFsfYVYuigM3tayW6bWmF430vtdZSx6zMVUtHHnwAqfkFnBFGol1IAVLSZgvqs8MJMEL0Di/5vJI58Yy/bHVdGoF81Z41/jz9rQkrvg6b0WgpJM6Ba8jVEAqhNVTDON6+OYDJQi8OaSWvTcTVRJOanpmWpcaTGcoFJVNzNL6tRSo2gtAS9UYDXkeRNnj5CZOQ/UwT5vfv7b4FVrFIrUE6XcbLAqEO7m1As2+twKL+nUhJ9Dd3DBEJzOpvVNaLh2dT2CMLEldhjmHG4mfPkt7CE9h6A2fc6vpjv2nepygODketShIotNhfJFr/hVmlZ5me/jH8rrUMxLPTqk2kdZRYPYHOc/3UN60F97xu2gB9B4gKEimTB+5Im5tzfH7dYaq1HDD9DPM1s9I+F5j5DxU5Yc/Tvh0y2DtL3DpuPbYvYLBdfX73mq34g44kCNwAgMw/5Ft5j/J5UZ5w4bnOtY1bUaFPWcgZrgmMmM+6B7zQnMa7KGpWu6M/EncJZEPUoERupXQf7aXoH92GwQqtCIKRz+MiatOINlCVoycn/5t2+bseWgBbOCwHGgby9E3H2mtFRYiFz3A+FBNrUofgUxtAozCeN7SyGHrr6o1VrOeddUisEfT5I/Cp16MbnNhgU6EfzC2mkZfOF9qSzThqfnJie8P44EDnFRt6JUryBC2pomQ5RBzlxihy632WiIop3il2moYz71IlZCpgFjuy0tmvgcIv2RXFnhnhN+kNJsWt30xnrNCrN2p/dcN6OTPcH53VbqnW5h3yb3ZK5CJrkfTSJ9b7v3zofyV1LN9Zqpy2r+7TdME9WQf8YFFPFtV1Eubp1ROGKv0qiVWkVhFabQlxWwgIpIO0lZ4+gZGkdpQ+bQLo7yJs4JPCUyrZyaWSu3Y1DMLGDoZSKFV7lxKTtJIGHzCCWu2oA1WFKRyEA9gfzfo7O44WA9iyCkb8zirdm67P8c9kqs2xryGxLIYPDBfImFuIHjZ9vJKiT4zU/ZaFe4QIfA7EYwXbbI0ee2amtgfOO5mVNqK5288kNk7AJiZB1yJ5QSoGZzyejVJk/sLZe2MYJLbA9Saih4YGsSr/y5D88R68fwBayu6DBeCf5d4EbIZWqbcAYytoet3HtkoMzH9ebl8KoheCnhTMDuZADRXr+gvsP3CobdWZkJd8TOmnYYSAqSMlGnsyQZCxKxF5AMKpBYyV1y8Fo/NkRriLfPWnSz56pmFJDP6F3+Zmr42jKiZHvVR87Zn+gGZ2m4+ftHl6bUai4Gcjs5FIul4+GKuNcOyhyC0Yc9Ah3WThSrF1W2M42FpMM6yfw3rLkzlbPrclhgIG0Hkgpyb+Y7M4FD7A9UHXvu9wdFeM7LmGh8XcCPRFjYDrRSqSqiLLTprZAh7ssrloJVNoXNX4vFodVKOULNsQ5O0+KWyNvlrsayD+xCh8ytfAg4nOdc6tmthfphHr/QWvqFaYoEhKwl3QBS5PGz8seOoKN1AZX4HO+1/7kNzBP4K5cg4UvyLVh2u/as7PgkWA4VCWbHbL7hXXVLz+n2PxVZRaCQON2iV3Vlsq/fhF/T0xYrqpFOZQDnRjfx8MC2nAk8WsZBbOy4UrGxLzk/MwmIgGokJRvv0vF2ArxqjxALZU/69ypaXj3ymeSxf2f5UdSaltxa8hqhRkr2//wKB/hrzJ6e2QU0PfZ7Z87j3IQPRi/C067Nvz9k2MY3cyun/YX9ACBwRWiuQmyJoV24ULZo96WvvaumTJWxK027C/hK4H28VTJqjDANvz8xwbdo/9W+5rFkqmu1M1syaPdTQWj7btOWMY+9ctpvy779yZ0fEw7MAfxUAdvaZTy0qgB8zNtHImvlK0VxQk1HDcmHMOQszpJ1XSewyk2jC0w4KIxglFW9gHN+vMpu6scH4vp9Jr1tlRyV6WCeXHSeSFXE81BxPqnNsnktyye5bkBRj4+hgqZF7J79n7lc6y5Z7AUefDfepaAna3gerGLsk4tcjUfb9hJRvJwnvBtnyhLTLHvXyrz/ZIKYuOmoMcdMWtNgtCayYFwpjkpy8q/IgeOtqbNf4wwUO2zXI5QVKugcQFFDs/36RUe3PY/EjBgtFvpP+y16l+CaOBw1tB2SMT9m9f9Ug/deI+YfHzkfWX2n/Yvmc5Xe5WV4oE3qW5lkL/IXdVelolKoAGEAZ/YC1WahDk0WD9mhC+mjusmGcV6Fh8spfjIMB9XYeUU9XkkvGQM27RUss0oNUpX6CvInrKBdkw9gXjs7wCvaVrNUEc46JttoLtxya/g7w5191HlzhGZ7kkaT1OwIeZIkpRxP6fKDHBomUmzVDmrwq72YKaKVEFZiZozU3GF1YDBemE2V5ieDo1+StqTwHPfYQQp3X58cLsZSRmKFdPWjBbam0m8WMW7Bz9f5+riox83FIwHk9xwQbkZnYmriXYBPNv1UW0Nj2K+nX0iHtN1jg1CzH6Lq9dUvnCSBwS+ahPwyDEGqYvzzh6uBY+xv13vNEU7/Wi53UVRP6DEpNOFbnwIzmgEU7B9TdmCMEwmzpvybJdpjXhKrub4JYSaHkO1hc7xovR7vlwiq5u4EAmiGdQ8nVdO73UVPJ2qDR1E55nTCygy15k/1AhTOWHAPh9geQS6AswhOOX03oLIy0zFXz6Xb2oPBSRhGC+ScexQQm25PQ8OIsSGYRcc6Pb9UL5/qTEFrdS1p4BQcvSkzvBinkz4CKKWQ7Tf7gwUSZx3q0wTNPB4J7ZxRLLu1pG6UKZRQKHdvfYQ3ro5WkhxQi5am5LbqmK1jCkol4JeBD7DGcsTj7+viJu7QNzu04LYGwQO3YPZNVd9XLhxhvSd4pYy9ojCcNQ5opQiqvkuDwnyu5c87kwDcwoB2FY7MkTceN89fZqaJDtKG1/i059lmEdKzJ983WZFCpKTXgi/OH35Yzhm9nIp7pwFEZGf5bewgwxBZrTx/PAQuSy9M7rf13BRTT4ui7ManmQNQfljHg+w5pBHz7E8EhUaJC8iT//8IYnKbrVxZHLEcs89czqgPi0JlwsQJ2ULYMOVVuFHXHXMPUg7n3OvclIYMWnMWH8rJwylIFQc+aRCk4WqF22DWnrGNb34Dtpa4qtBOxfhe3ENSecpv+lAdWZNw76UqP36uhvhq/Z3XAkdfjntx57ER51y8m/XVEo/rzwaZcxLQ+1hUlUK4Z7XKt75KyfX/Guenn0AKawTCE+iWDgz0WaQ47aOBf4Uk8beT1ckUe6dgn9Vf2Ioxv2U8ddHHRYxBQWoCz3UmUf2X7+UmWI8SUGQ6oh7VwCwbX+5AUFp4pvhkDUfWYNPLvasiw75AV+OZOxb7mLM/5trfotpK9iBTKYytfBEZ4xr0tIpV60epsx1xEk7VawAHpJxQKO/SGO8Z8ZVUVITt+6C7e2bOS1sZW2yQg2uZ9/I90eWueh5DJ4s0k5VMRaNFvVsb/GCg7046qyaqTiyYhtI5wbC4Y/Hp/w5HF8Ny0DZrj38uWJGcB1n/Yw94FPgh9DDs0ZH0ygrUGmBD7Bamm2AL7eEL5jeUaC8Z7B050kJySPXXhDyb7Lu7idEKtXzdyGxY7wDHFYx/ft9kUUwzUFRY0vMUBjJeePw6/YQxgnSl2RPMVPXKcFHbX7fvGIvaagVvKQyXu8vh937KetJRg1YRw2q9U0fydIFRSJupG4MFT6UYOtueAd/JGJ6+B222L4ehUXzhK2ycVx6fDxcib0rBBxkTMwAhM4jrZOb9fNN6WboE6wMjrWBXBLOrauz07PHhPGPcAvm/lfoCyo/+c61LgR4GYm6dufjV2DMRmCa4nzlWhSttrSbhI2D+zhvWWNfKckNtwPlXPadJSDSHhxcAa1TEPeGeCE/j5kUtN21lYuIEnU8q5LBIHtiZHx9kl/njt5DxfrOhfcNSOkkRgtcI9kWVkFQGl7rDYO8IfhddwUR7GB5xyxakta1No53OJGzY35S0ymAZTS182HvzYF/zIjBDZfnRkKk8krH2Go4CV2z82JB7qxqoknC3cPlPbfN27ISh6iyC5JyqjibE5gW0iz39graiKfW0primNEp6Vy3RAJxcJTTKeKwzItnwFKqf69j9KKC21FIsogntnJRT+WK8W1orXX6KHnEzlgw4ja+1Lozm5YY1qUpBMGNLf5Pr2l/OjFfzlWcbiGdKo0cixAE172tMKZ4VUfuyiV1gRGEcTmTe6Q3Obm4PQDeAWY65F3m3sHBdIb3gZBWqeWF8dTmJdSTO55BTBtbgj4ckNdsZlFPm2oqAaD+/f4hlycUhL46T1U5G83p52RCe7iqMIntk+9053LIVg9lK4y3TjwexLsVRSC5EKcDjtVQMcvKO64+XJ/W1Ap/McbZlDSP3V7FDk8hjslHNAmhKaSVLjJLZK3WvEpg2N7XNcTIUyjpchvUYBJDRZnxie5ed5sS/MlPwRqYhGlJdFuvik1aj4YB04BZYZHuHZX5R2qqsz8I6wWUQSLLXWQj6XJRQvII2xKJK2k9HOSuct64gg94S37IH6Emg/MOGyC5FBtuu6gxrzJW5sVpKbkArXfpw5gQykRqCk+qVYfpaiFSkGkOqPWT/ox8fo2y1cNhlkI8mytrFRnENk1XFEyMZYtXWmXL3FBcBveAX/Nz5v0dAweGdIDcKXveT7NFtkCtO5DRjxqhSq+ZVXke5CD+uOeTYZ5DQ8+GWvcOeFx6U4O55/bek4spyGadw4XCtiQyW0h4Grj8h9x6b1SbdC8HXhjjrhnqg8G7wbnG3g3OcStxAYEYuI8zAL+ocbJgFsB8QPjbq2q2RkaFAwykmTX/88kiJnTzQw4av+opY+xngttI+thJg74DBm9rPJ6VyX+kFl1hdxezlAZMyJjqJT+sYDOaPzNgbyJVZ66mfxv8aPCWdCBg7sl38ZfGMPC5HX8iK4MWXfjc5K92Nh+mXNZgrg3MGy8B0mVh7xuyEusLXDh1qu9Jw+RN3GBx8LVyUvsIZM4bjdfdwUwx6vKIxhvgXeZpDdrg+ziTG8PQ7LUDRLdiNM4rCiyyL5PA85SZcSumGwv5mzDVxc00i0fB6LrFRgn5Q+5IdN+v/39ES5J9eOolCYH22rdM2FH9r3o0JaZProOZcGbh+C98cTh6oYVYqHtPC4YmphMy/4cmMYn0Tl/PKDrsyvkVZwwFMY0Rdt4FkpebzdxP+xCuiIFbrY55wg2YWIm9Mf8WZEEmybBJ9Kbui3bF/v8IAa4Inj6SATPQC0csj+ABtCHJKeAjTwwdj8wKecfwYlCptfLnkvDmvIXodhV3YQdFPn2hFTQ5h98llPiK3jJN3lM0gWqpkQF2KuLweMEDz6e8KBhMBWrimG4RfMIPi7/42EF9/NlHixiFqw8On5t4MdVvF5TlvIvqSvHb90qqfsqtHEmqbJ1jy7vnPi43gOHOrgcldLgnWoiydAho6RN8YZEyjKivH4tGu5l9yC7AoJplp5O8WJzL/x2KENBvqL9Gtzyc70zwCbybPqvllAQ6SaPkOTL/lRShpS2fhb7ZFtkKwZxMCLmSueQUpN3lHiB0MK8kl+sQ2LMxZjrgAnckIru77pUt+tF1gBrF5XiZHB4h/7GEJcdpoQ0tPRMNChag3fxluc4uiEV4lYsABbRZ255ImGgJFyYVVNhhXNPueN5EjY9q5dZ+jWJkcBOQCm+XyhZbGPYSSrilLGDEjYB9NSkdLFZgOv1lVWdUvAee/Q2oVPnyCylr1+xyA4eTO8cLahzksJOMGU8eeGNxU1+NoNXqbUc7ftaS5xogz1JV3l1YVvxXV8HAGZEJ8I0gPSXogiEpmcZ+mN5+oczCyOIHJUfxAXqhGtfqnjJI16hp7ksSD4dn1WIaQ9063VEtKT1781cn2FRsaiTRo+/gxbrxTEGafNjP9JDTEvAgF0nrIrQUwSz5gvttRbGgp8vQ/HzxLDwmQSdSvUffwok/jLjrG2fEvPN14yBXNMSNNSWCmkDfZG50W3JFAyl7NoqaFf3Yodt1PVbhJW8kBOvWMg6aHsOKxLmAxXyypd6NtO+MFaEZ3ZrRoo03JJ4RdQbLIL22bpxEzQq4vjIk0FD838Xt85TuYuM+OX069jYk/eIQ/S7RJdNTzeyPTOcPhm1kCnfoyOBDkFgpSmnTNeiD5C4rLmUtL/LElwU6Bk/T52/LMwCe1VYzhyxWYKjGs+V8xtPhyDC93adhDbbXS3czhACssOKNZqXl4BtqXKEQUtkWbfxCQBEkBOEzAphp5+IshNleZ8B3Sg0Dsw2BWG4J6a5dK7VOA3j+1uEp2+fUjVONecUsAWvDjtXgMOJEqgcaBfgg9roPNN7Sf7ewpk1e4KUAT07hC+qQvDGCDimPvJzL0kBXlFJv14BTJ89vThHkBdHITY0jdCR1rXh4N0CDo2Yyr6aJq7Emvz1Gh+O0RYMYolEWSgNlhrdDof2NSZ6DfOtlgDFD/pyRrfAsN2I4cu4IxEM6Rgs6We9erePBRprDpS9sxSwQKbI1YhWDn1zVfI/yiBagIoPNih+aOILPiR9s2+WjvWxluF3DFcMWsUQxtOroah7p//bz1l4dDW1MNxoAy8r1N9j96QYE9kZhJD6gKSR0ZxBL+Dp8FH1dCnnZDJW38Voy9l4zr3FxSv6D9uYkF4BbDU86bfOAyuRf0egYKR041cK8q9TeX0OTz6+lEyaJ3qe/S499KptG7jo9cgQ4Tprrflm8RacxdsvB55nWSnrE+kxfxnYKkXNA//s15jToaJXEMx9IXn9d7Kp+d9ik0xHa9GIBqZr/HFQ26aaAdYb/G4Qe6e7SglT9d16M4YfgXmRvsEajyS/0et2/+E1YD/G7SWuKwA0BigM46SlBld+TbzKaZh1cMY62xed23CwUznGATklCVzFH+I9/K07aHhMxDXGUn36Sq6S8WXVC2LxVazz71KQs9PFEZIgwtIt3PFB/boK3XMEK1QXk6reWWIHoe+1h4m+vSnJ0a5kbh8v/l9OkYp2hl2FC9Mfj2oiq7KA1OXdc82JAk9CJxtKbZJuLaHh0+ErJfnIUX7Plc3nhU79Xvn/4FkJeAJwd8WzKIWMVHiDzlmBPKi2fAY3rYOjoA2v4DqvqlpIYjJHaEpdK3JPbx0S/Wu/JfcDAZTlbBfXEQDC52i6Xd16ryH1sNQvL/a4MWaHuledgzvn63+3ttwzh+y0DfPEozM4/2FpoJFJpE+BJj10sACxVUST9S5D2FasctBzHLlUM7a1CenILxzTFI0ePa9azFigM3gnjJlNK+2ZgPNvcCInmBcQs08Gd08n+wxGaVLF6dJJuxZBeByp32zq7ulJ9GUabk1GUG0lzK4I9Cv+jOMwM4dYllCYWblxIw2L/G44hvqn47fgBaRBsIMmtgXH0fpACHVKIPdVywrOQmgMWcGxiphvInyuQg9TMJ8deY57H2wBmIsMDs/YQ9MKAj0rvIfStpLi1aSAHehh7YtM8qtW5PtudjmNSMH5VKILSC7oWVD1F+mJHjYho4S1eeEPQ3YID3yImnNiBK5oeB0gmdK5oe2sUobD4O+yoLviz78yhjMV8UO50IRS8VikRswuOcuQP07EHUkqpZbDeNEHUV28fuhXyxtdycZil76sB2VQbHykFi8Bb4EITV3zi81MDF3FE5MjyTl67ZlcnyfDtqn3rXPcHO5SX16+0oySKdOW7A5o+/+khDj2ZP0roo3nPYIbMqDW+olf26eL7wVkvdIPd8K8gT65OWh9ydS3qfo5bVQNmnNEK7lvHIzkl2qNHmqihm1UXPligwh5CNAKxgS+dcByedDz93snJLgUfDcc+i2tDlIP/qcoLlkp3MePHAXErPOKFUxLAEpaRuLT7cQD4pthE0dCtODq40nxJKu+bdPdEFoMwF/F3AkEkoQJdzVaLWT/r17FG+pjvxiDFENa2Kq2W7lIdBNO2QpZ0uEIH/URKcMAHR5Jw3+FcAMlxLHxoQ9sQwHnVzQYfwLcTQshwdqGtgl68DyNYoVEaigounGXIVBM+3W6Vqxe9CtFbglw3bXBh07Sz643+Pynonh20J+c1TdopkKDMmGcpdL8eqXBAumI6Cjj/9IIoP6a3ruSjewSwKh0OAvr5i9CBkBhQaQ+TndWZFL+ts7HQiHtgZC+QcqH6lqlCEY15cXAUxC9BMScMrXLGieMrFAslb04y6ISJ+CIXkKKW6yHk6qaJQyjIo4NqkDj0TsOMYGqaeBd1O4Y6BbznM0L0nMRVYDvQkf8eURQmghcvhLq08C21tY4MQIw4OqpGYVazBV0rfgajULvaIyKXG/QCHuVDUftbZ80F1tzlph2rLQuCAeXkFH7N3eEO9+vlG7FeVJgQ10qvilOPyrCJdR/rMrq8t/QSNwK5lQlAvOQTEXZU/WkvthSxul1A1map/gtFRozdKnb2O5iPxLFqFPBw6Z3sM8a7xkKlpA4Cf0oMp7LOw0SWSzAp0qa/8UcZALhMlir1EP0eT2cX0TOzkoG49mSa2lD4l2O+2oSIJ3jyawYEBG1IVCZdG0YFwSiwISrbdWJOCl2K55VwY8BBCQUSlcahD8HER5VMJbHzu8yloQZsx9149SN9efu5/iBEpe8nTfp4Oo6ZWx/FY3//5byRiXaLG6DgCOmfzFsEF0FPvh9Hsg5eQzYkmy1ZVD2TP1Z/QCeemhda2cGF/RSmnGLuPptGjicEQ4BxKOulElDGm8w7L0VD/4pL5xYG2mFtbor3R8o4HX2npnnzNBgwWnFFkVEY3Acwc5kVFTQocKAiFQlOSv8CMxTVAHOxYD8qPPING9VkowrlX7mBZAI+CQHTGk6mcqvy37dhTMSBaEdANNRUVG1Dhiucdeo9QWm7Htv0oy8FnVwDUwPmejPR6wRd/lXXjp5bjih16KotInmrhiCskJseb/efRFuEb0XcH+kNum2uwop6feNhoeOlWGHuW8dXfsEO/TF9HNUWOCjSqAKgM/tfptSqUnIDXoJ8GxnBTC9cYIgzKyppoKmLHwqas/dFDmWLL+Fq9ce4+azoEKYo/9Ol4ZDB5jO4TqNYiqKg9SIY4mphzrXNs+S7KNHuy4uDA3Ayv5lgGAbVMd06MV0zeEBOwAP3HLmFtPJQRbcUCxb2c+HGF1FW0L6Ff4RjD4am6ZFXjPfCT1DmFNZDtBUiKL2ul3BRdPkS9G+4LBVWFnxxWK375aJb0UdkNSrDJNup3NR1GbTSec81BbEienb8Osz60QRX3b3KaqqD9AllTAiL4cTFfN9cEb3AkPCv9lSql+booqo1d9S8afzZU4PRrsUh4YiXbPKyroMCuGfQnt5OEtl8xGMLAJ9wWK+DfdGkjQ1AmLFR+6WS3Po41jtZcznzpHiMa2Bd5cqS8qeIzkCIchpK16jld4e0Z41E4Xx0Q/30ro6w333XgFg4LtYhBkYtyBd5aK8b++MkNdDQw4nCKWdjfvMlzyzr1CCFsU1Odo4nuDiGFw4C1W3HsxVFq/OHd6C2tEkJnm2pA2qBxA7nONOk2KfJB03qf2+c0PBbEmmZDmd+3iGxw1iTNPLaCfC4qv+svdRLCblRceZ92+T/5bbX93P89/cvrw4u7aQvENcP/bixLcpeY2NksvmRExmC7at2Xv09JRsAuyaRLAykI9/KWO8UjsRZ162SvXjnCrujtN1wGyDLSLXFi1L0S/7h54S1MpQ9cXo8n4v4uOMMxs786gqn1g4mMlnHmcyVvAU9m/oeuB4GBVj/E5yRFib/MCHAPIcvEZ2p3EJ8V9X7xaUNXpMnIzikq0PAc3ppGh4uQi9C5eahhbhFgNFS75seGytEjrgiL7AwFczEPwPQlKaUClcqsSivf8nnntgm5NNqeDI4fz7/X9qoY9nkUu7IY42k8Ax41YMdu/TyW/HQ9aQ4GvFsNgQSuIV+xX+/FST4QKa7FnQm9IV+XUmHGh/OXKbsnXm0I4llr6uHHpQxBMXH7UgvB8FHJioK/owUWeq2CrgmMvJTOZUqT3ahKJs3VPXpQBRn5MdH7Id26LjUsymu0cmqdBMDBCWjS1dwHjZCz3/RB5eKqXod/HWwQ0NG0fyxEujH3NgUA3MBVwqPpr7bGy5cA9E20VrEnrRo5VeikQAx+i67vrUuAFX6Ka3WSJvGxYBOCYCrkCjrEpr/Ohj0/asOJmg9B0z++Rqc+azhEIDjHsJK4wnevh/m5xi55SsjvHJ1KM0lr8l3EtnrLwVnhcPNEaueJVYLmhIQt9Gb27cprQMtbtmbwWlAzpasgqjgzWvjN/JKGurugIsiPqN/o6RjRPt05xm5ba2EUWW0fboxj4F4NQjZlN4IbuSNB3rqKp6M2fCuTtjrALB+kD8Gw3kyrMUiXD0tB+GvImAgeWp477L1XnQuZSPy/tgPZ+0SKrNWxWPa1+oKI85SBZv98PrQZThC7jKsEdfJFeJheZieq6zRLCjrNJ21eDGSvHarq8Yi15txzoBZkTu7nkK56Bl9zNPvyxfh23+zGXcgSan5q+mtCEZ0NvQZmpb3YmwOtG4uAROQAk/7+zoNrBpuFykBk/7vzvb9lvdHk3/DuxGgY5cH8JxWTyaeSCOtdKq4XEQFy72LoT2kHizQMWmiC9NIFt87e+ZKv7GyxY0N6Qqd7Nhp+6lLjJd1jrNJTWJoxesnP6cOaYXe5QhRQSVH39yX2/YSL5vW7MUDpNdCS2tkX6IoDElWD8weDINEsIvXmJQ8EWVUHElOPONDwg8YceNEVrnDkGtJZ1Eo6i3+9TkWg+fRzBHb8phKDfposztsourzMgoXu8Mm4msJR7IH79UrGAACjENdTdOqifited2V3kIjcwIeAn65fuiwyXFZsAJeC/JNmF191h2nefY2H0J1ooFRjDl2OZ4yCP+FIgbymVXQVV+Emp4dOls5Zky60bh3e54go5Ss2T9XPG3gChfD2bbfeyt5HjrSkHgsw+X+S/3UumYn/tLoSkP/OwKqttkJFrDc6BmgYSNE/ncP+OzN1YVfHYTWcyo08vFBrAhpoDS/A3E351MslSubP7Lkwk4PuxYNk6feexMTEsoPUnhhYhSwCM97v9+V4lYTB16xw8U8Pob9GRLSuS0J46padbVlHIYQ9N8WcOS6eiB78u1wz1c4EF1GUWyTsGfuL9POXvxnfkGJu7M3GR3fu5MjAmR6mB6hdJP2Fd5MZq10jVBHaR2lUmAC06sQRar0UijCP6O38wwDKMMGdmTzd8dDfyqF4AsCo7ITBioYOASSNpQa6mDlNqTVmH5LQRkUMh3do7iHolXut+n2ZHZEG4txXrXLN3rTWFwhUUNfHGkS6Svr/YpsgeBL2/OtmxVBcoWx4n1mnuCKwA69i0WemsOVVGHPfgWl++ARXircmpZcF5u7bibZO9nwQvIzi+l26mGGT6Z7L76I4l4HLRZVgPHwjaBmI9xNzn7zufQYENmhyjZMwxo3lfnZKmBtS41+T4MXSOIbsBubByzIoEOIAZHgC6ujAsPnlEGH6y0mQSYy6yepoIAe2h+yGN1KiM/rSHIrsK046oAsjcLgSpvr3Gn+W8TtEPoNG7AJ+56D+lyR0fqugSMHI9HSH5je0+EksoWKP9XpZ+sc/Ly6sux++GkoEGxkT/Uu7TkATjVrWZfO/l6v+lhdILBkJmPFzcsF6ivJUAaIramjCg2k+jC2Exgd0tb9jEvodpjFi0O6dSgbPScScLF+bfk47/murgTJk8EzJJEAfpqiufk/NdNRqOgd3tlkj3kAPqmJ/qDwTN/vAnPIMInxVXamOh5vgarSPH/XGxxdTWDIKWf2EsMCfPt7Zlh60Ry7XOQ3VIgyPT4mAQcnotkWl1n890q5ZGbfE75JDOw3b/zRNIIunhE1sL8qio+YqRIhFWuffDFMOJw3LpaxU+y79pOsQ9nctk+QX1xvPeZd0NGq4+OgYUIj1ppC8DAniiGhUjGbXi3Gg9SiFVJIcO/L/Mbms2ywdyB4RZXY8y/zdLMq//VP65G8kDO6Xe13Nm30FG8SF7akqJFPl9AYiVGeP9321xg1XSzoXqEW1bJOV15SkLdjL5OWPeMmNH3I/16GIcx/W8t+uFzKLY0NvDjbfYMasBTsmk3qZUV2XlxcWbdWG38KsByYe6+5+x3ZuQ5jSfn2mEYC+GOUEgN09KGU5y2ILPFttrjZM7ksCpztjIWZCO70Ge4ZSxufbjOVTYkvnp/dz6AgpC+OB++CYge/JfFrH45VZZLUbeA+pB17r5ALZqlOyjnpmQe18Q6SNEr7L02HIvWxwm7rAdliOxKY03JqBi5NuJHk3oCE7haCwxcOzRYiN2/LfUoQBILz7YJgfvnI2La4c7l6s1re9wQWnxxjBJq13nrkammJqt4boSW/4bN3EqqkkfqWmQVBUcS3BLM8wGOUPm0qk7KKCIHMevtWgF3ud3npPw0Z/uW8e0nH9qYcW0Ff3uJ+cVvLXZIBW6QpqDVm6aiOyK+NhlAlxSFONuECLGR7LVyMHhc+N50sc9yVdBNlRyjT+KdlqE9PIdNPTgwqECO5M7dzboWVKFKgcf3ekROTHuch0W/oa90Rd5/l2rKMEKFR43zuEA54cmpWjx6LF8gTp+o2eUfnujp5oqzwxGRgiv8xhDXtjpAsjtf9ImpIbVXHganPRR02aMQ8pNWct508giUbkXvWAmGMLX2ZI/5uzk8C1BI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+{"parentUuid":"fa6d4476-5f85-401f-a943-3205f4545b4d","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_01WKx42SgBdXDbpY7tGhAqeo","type":"message","role":"assistant","content":[{"type":"thinking","thinking":"","signature":"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"}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":8421,"cache_read_input_tokens":159168,"output_tokens":3483,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":8421,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":2,"output_tokens":3483,"cache_read_input_tokens":159168,"cache_creation_input_tokens":8421,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":8421},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011CbjiKRMtLzyXtgnxbY8bX","type":"assistant","uuid":"b3885269-840e-4fb9-909d-3e48928c4e1b","timestamp":"2026-06-05T07:24:56.316Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"b3885269-840e-4fb9-909d-3e48928c4e1b","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_01WKx42SgBdXDbpY7tGhAqeo","type":"message","role":"assistant","content":[{"type":"text","text":"Verified. Now I'll write the review report and remediation plan to the plan file."}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":8421,"cache_read_input_tokens":159168,"output_tokens":3483,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":8421,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":2,"output_tokens":3483,"cache_read_input_tokens":159168,"cache_creation_input_tokens":8421,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":8421},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011CbjiKRMtLzyXtgnxbY8bX","type":"assistant","uuid":"b5760b2c-f6f0-4622-9c50-2ad5bceebbd9","timestamp":"2026-06-05T07:24:56.318Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"b5760b2c-f6f0-4622-9c50-2ad5bceebbd9","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_01WKx42SgBdXDbpY7tGhAqeo","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_018R4vp6SxzMzMmR5rNjaWfz","name":"Write","input":{"file_path":"/Users/jan/.claude/plans/this-application-uses-a-shiny-flame.md","content":"# Code Review — Initialization, Startup & Shutdown (critical/severe focus)\n\n## Context\n\nRequested: a thorough review of cc-backend focused on **critical and severe**\nissues, starting with the initialization / startup / shutdown paths\n(`cmd/cc-backend/main.go`, `cmd/cc-backend/server.go`, and the subsystem\n`Init`/`Start`/`Shutdown` functions). Three exploration passes were run; their\nfindings were then **verified against the actual code** — many reported items were\ntheoretical or did not occur in the real call flow and are listed as rejected at\nthe bottom so they are not re-investigated.\n\nThis file is a review report plus a prioritized remediation plan. The previously\napplied WAL-on-shutdown fix (`metricstore.Shutdown` now rotates WAL via\n`RotateWALFilesAfterShutdown`) is already merged and is **not** re-listed.\n\n---\n\n## VERIFIED findings\n\n### F1 — CRITICAL: `disable-authentication: true` aborts the server on startup\nThe server unconditionally requires an initialized auth instance, but auth is\nonly initialized when authentication is **enabled**.\n\n- `auth.Init(...)` is called *only* inside the `if !config.Keys.DisableAuthentication`\n  block — `cmd/cc-backend/main.go:175-181` (the only two call sites, confirmed by grep).\n- `auth.GetAuthInstance()` is called **unconditionally** during server init:\n  - `cmd/cc-backend/server.go:123` (`authHandle := auth.GetAuthInstance()`)\n  - `internal/api/rest.go:72` via `api.New()` (`cmd/cc-backend/server.go:184`)\n- `GetAuthInstance()` calls `cclog.Fatal(\"Authentication module not initialized!\")`\n  when `authInstance == nil` — `internal/auth/auth.go:258-264`.\n\nResult: with `disable-authentication: true` and `-server`, the process hard-aborts\nat startup. The flag is otherwise honored in 7 places in `server.go`, so it is a\nsupported configuration that is currently broken. Default deployments\n(auth enabled) are unaffected, which is why it has gone unnoticed.\n\n**Fix direction**: ensure auth is always initialized, or guard the unconditional\ncallers. Cleanest: when `config.Keys.DisableAuthentication` is true, still call\n`auth.Init(nil)` (it sets up a session store and returns early without\nauthenticators — `auth.go:181-206`), OR make `GetAuthInstance()` callers tolerate\na nil instance when auth is disabled. Preferred: call `auth.Init(nil)` for the\ndisabled case in `handleUserCommands`/startup so `authInstance` is non-nil. Verify\nno auth-enabled-only middleware is wired when disabled (it already is guarded).\n\n### F2 — SEVERE: startup-error path skips graceful shutdown\nIn `runServer` (`cmd/cc-backend/main.go:392-463`), if `srv.Start` returns an error\n(e.g. port in use, `tls.LoadX509KeyPair` failure, privileged-port bind), the error\nis delivered on `errChan`, the `select` returns it, `run()` returns, and `main()`\ncalls `os.Exit(1)` (`main.go:589-594`).\n\n- The graceful-shutdown sequence (`metricstore.Shutdown()` final checkpoint + WAL\n  rotation, `archiver.Shutdown()`, `taskmanager.Shutdown()`) lives only in the\n  signal-handler goroutine (`main.go:406-418`), which is unblocked via `ctx.Done()`\n  from the deferred `cancel()` (`main.go:584`) — but `os.Exit(1)` races ahead and\n  the process dies before that goroutine runs.\n- The metricstore background goroutines started in `metricstore.Init`\n  (`Retention`, `Checkpointing`, `WALStaging`, `ReceiveNats`) are tied to the\n  store's own internal context and are never cancelled on this path.\n\nPractical data-loss risk is low (the listener fails at startup before any ingest),\nbut \"graceful shutdown\" is silently not performed on the error path, and it is a\nlatent correctness gap if `Serve` ever returns mid-run.\n\n**Fix direction**: on the error return from `runServer`, invoke the same shutdown\nsequence (or trigger the signal goroutine and wait for `waitDone`) before\nreturning, so the final checkpoint runs.\n\n---\n\n## Lower-severity (worth fixing, not blocking)\n\n- **M1 — port-80 redirect goroutine swallows its error** (`server.go:417-419`):\n  `go func(){ http.ListenAndServe(\":80\", ...) }()` ignores the returned error; a\n  failed bind on :80 is completely silent. Log it.\n- **M2 — archiver shutdown leaks its waiter goroutine and skips a `Done()` on\n  timeout** (`internal/archiver/archiveWorker.go:222-249`, `:115-117`): on the\n  timeout branch `shutdownCancel()` makes the worker `return` without\n  `archivePending.Done()` for the in-flight job, so the\n  `go func(){ archivePending.Wait(); close(done) }()` goroutine never returns.\n  Only happens during shutdown timeout (process exiting), so impact is bounded.\n- **M3 — NATS API workers/channels not closed on shutdown**\n  (`internal/api/nats.go` — `jobWorker`/`nodeWorker` loop over `jobCh`/`nodeCh`,\n  never closed; created at `server.go:330-333`): goroutines block forever. This is\n  a one-time leak at process shutdown (not per-request/per-restart), so low impact,\n  but buffered job/node events in those channels are dropped silently.\n- **M4 — `metricstore.Shutdown()` is not idempotent** (`metricstore.go:274-321`):\n  `shutdownFunc` is not nil'd after use and a second call would re-run\n  `ToCheckpointWAL` + `RotateWALFilesAfterShutdown`. Currently only called once\n  (`server.go:484`), so latent only.\n\n---\n\n## Remediation plan (recommended order)\n\n1. **F1** — initialize auth in the disabled case (call `auth.Init(nil)` on the\n   startup path when `DisableAuthentication` is true), then smoke-test\n   `-server -dev` with `disable-authentication: true`. Critical, small change in\n   `cmd/cc-backend/main.go`.\n2. **F2** — run the graceful-shutdown sequence on the `runServer` error path before\n   returning. Small change in `cmd/cc-backend/main.go`.\n3. **M1–M4** — opportunistic hardening (log ignored errors; close NATS API\n   channels with a stop signal; balance archiver `Done()`; nil `shutdownFunc`).\n\nEach fix must respect the change-impact rules in CLAUDE.md (trace callers, check\ngoroutine/channel lifecycle).\n\n## Verification\n\n- Build: `go build ./...`; `go vet ./...`.\n- F1: start with a config containing `\"disable-authentication\": true` and\n  `-server -dev`; confirm the server starts and serves `/` without the\n  \"Authentication module not initialized!\" fatal. Re-confirm a normal\n  auth-enabled start still works (login flow).\n- F2: force a startup failure (e.g. bind an already-used `addr`, or point\n  `https-cert-file` at a missing file) and confirm the metricstore writes its\n  final checkpoint / rotates WAL before exit (check logs + `var/checkpoints`).\n- Regression: `go test ./...` (esp. `./pkg/metricstore/...`, `./internal/archiver/...`).\n\n---\n\n## Rejected during verification (false positives — do not chase)\n\n- **\"DB migration runs before Connect(), causing multiple connections / lock\n  contention.\"** `handleDatabaseCommands` (`main.go:139-168`) only acts when\n  `-migrate-db`/`-revert-db`/`-force-db` is set, and each path ends in\n  `cclog.Exitf` (process exits). In normal server startup it is a no-op. Not an issue.\n- **\"`GetUserRepository()`/`GetConnection()` called before `Connect()`.\"** Order in\n  `run()` is correct: `initDatabase()` (`main.go:512`) precedes both\n  `flagOptimizeDB` (`:518`) and `handleUserCommands` (`:531`).\n- **Archiver \"double-Start\", \"TriggerArchiving before Start\", \"nil `workerDone`\n  panic\".** `Start` is called exactly once (`main.go:377`) before any trigger; the\n  worker `Done()` accounting on the normal/error paths is actually correct\n  (`archiveWorker.go:128-168`). Only the timeout edge (M2) is real.\n- **\"NatsAPI 10 goroutine leaks per restart cycle.\"** There is one process\n  lifetime per run; it is a single shutdown-time leak (M3), not per-restart.\n- **NATS-close-before-ctx-cancel \"panic / mass data loss\".** `nc.Close()`\n  (`server.go:461`) stops callbacks before `metricstore.Shutdown()` runs; the\n  `walShuttingDown` guard in `SendWALMessage` (`walCheckpoint.go:150-164`) prevents\n  send-on-closed-channel, and buffered `msgs` are drained when the ctx is cancelled.\n  Minor at most, not critical.\n"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":8421,"cache_read_input_tokens":159168,"output_tokens":3483,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":8421,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":2,"output_tokens":3483,"cache_read_input_tokens":159168,"cache_creation_input_tokens":8421,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":8421},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011CbjiKRMtLzyXtgnxbY8bX","type":"assistant","uuid":"bf1f1bbf-50bf-4e37-a248-d1b357aca920","timestamp":"2026-06-05T07:25:07.290Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"bf1f1bbf-50bf-4e37-a248-d1b357aca920","isSidechain":false,"promptId":"e03eec5c-111d-4cd6-a2ad-e4499d1dc6b1","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_018R4vp6SxzMzMmR5rNjaWfz","type":"tool_result","content":"The file /Users/jan/.claude/plans/this-application-uses-a-shiny-flame.md has been updated successfully. (file state is current in your context — no need to Read it back)"}]},"uuid":"cfe4ff49-45fc-428d-8548-9d4cf99b6f84","timestamp":"2026-06-05T07:25:07.346Z","toolUseResult":{"type":"update","filePath":"/Users/jan/.claude/plans/this-application-uses-a-shiny-flame.md","content":"# Code Review — Initialization, Startup & Shutdown (critical/severe focus)\n\n## Context\n\nRequested: a thorough review of cc-backend focused on **critical and severe**\nissues, starting with the initialization / startup / shutdown paths\n(`cmd/cc-backend/main.go`, `cmd/cc-backend/server.go`, and the subsystem\n`Init`/`Start`/`Shutdown` functions). Three exploration passes were run; their\nfindings were then **verified against the actual code** — many reported items were\ntheoretical or did not occur in the real call flow and are listed as rejected at\nthe bottom so they are not re-investigated.\n\nThis file is a review report plus a prioritized remediation plan. The previously\napplied WAL-on-shutdown fix (`metricstore.Shutdown` now rotates WAL via\n`RotateWALFilesAfterShutdown`) is already merged and is **not** re-listed.\n\n---\n\n## VERIFIED findings\n\n### F1 — CRITICAL: `disable-authentication: true` aborts the server on startup\nThe server unconditionally requires an initialized auth instance, but auth is\nonly initialized when authentication is **enabled**.\n\n- `auth.Init(...)` is called *only* inside the `if !config.Keys.DisableAuthentication`\n  block — `cmd/cc-backend/main.go:175-181` (the only two call sites, confirmed by grep).\n- `auth.GetAuthInstance()` is called **unconditionally** during server init:\n  - `cmd/cc-backend/server.go:123` (`authHandle := auth.GetAuthInstance()`)\n  - `internal/api/rest.go:72` via `api.New()` (`cmd/cc-backend/server.go:184`)\n- `GetAuthInstance()` calls `cclog.Fatal(\"Authentication module not initialized!\")`\n  when `authInstance == nil` — `internal/auth/auth.go:258-264`.\n\nResult: with `disable-authentication: true` and `-server`, the process hard-aborts\nat startup. The flag is otherwise honored in 7 places in `server.go`, so it is a\nsupported configuration that is currently broken. Default deployments\n(auth enabled) are unaffected, which is why it has gone unnoticed.\n\n**Fix direction**: ensure auth is always initialized, or guard the unconditional\ncallers. Cleanest: when `config.Keys.DisableAuthentication` is true, still call\n`auth.Init(nil)` (it sets up a session store and returns early without\nauthenticators — `auth.go:181-206`), OR make `GetAuthInstance()` callers tolerate\na nil instance when auth is disabled. Preferred: call `auth.Init(nil)` for the\ndisabled case in `handleUserCommands`/startup so `authInstance` is non-nil. Verify\nno auth-enabled-only middleware is wired when disabled (it already is guarded).\n\n### F2 — SEVERE: startup-error path skips graceful shutdown\nIn `runServer` (`cmd/cc-backend/main.go:392-463`), if `srv.Start` returns an error\n(e.g. port in use, `tls.LoadX509KeyPair` failure, privileged-port bind), the error\nis delivered on `errChan`, the `select` returns it, `run()` returns, and `main()`\ncalls `os.Exit(1)` (`main.go:589-594`).\n\n- The graceful-shutdown sequence (`metricstore.Shutdown()` final checkpoint + WAL\n  rotation, `archiver.Shutdown()`, `taskmanager.Shutdown()`) lives only in the\n  signal-handler goroutine (`main.go:406-418`), which is unblocked via `ctx.Done()`\n  from the deferred `cancel()` (`main.go:584`) — but `os.Exit(1)` races ahead and\n  the process dies before that goroutine runs.\n- The metricstore background goroutines started in `metricstore.Init`\n  (`Retention`, `Checkpointing`, `WALStaging`, `ReceiveNats`) are tied to the\n  store's own internal context and are never cancelled on this path.\n\nPractical data-loss risk is low (the listener fails at startup before any ingest),\nbut \"graceful shutdown\" is silently not performed on the error path, and it is a\nlatent correctness gap if `Serve` ever returns mid-run.\n\n**Fix direction**: on the error return from `runServer`, invoke the same shutdown\nsequence (or trigger the signal goroutine and wait for `waitDone`) before\nreturning, so the final checkpoint runs.\n\n---\n\n## Lower-severity (worth fixing, not blocking)\n\n- **M1 — port-80 redirect goroutine swallows its error** (`server.go:417-419`):\n  `go func(){ http.ListenAndServe(\":80\", ...) }()` ignores the returned error; a\n  failed bind on :80 is completely silent. Log it.\n- **M2 — archiver shutdown leaks its waiter goroutine and skips a `Done()` on\n  timeout** (`internal/archiver/archiveWorker.go:222-249`, `:115-117`): on the\n  timeout branch `shutdownCancel()` makes the worker `return` without\n  `archivePending.Done()` for the in-flight job, so the\n  `go func(){ archivePending.Wait(); close(done) }()` goroutine never returns.\n  Only happens during shutdown timeout (process exiting), so impact is bounded.\n- **M3 — NATS API workers/channels not closed on shutdown**\n  (`internal/api/nats.go` — `jobWorker`/`nodeWorker` loop over `jobCh`/`nodeCh`,\n  never closed; created at `server.go:330-333`): goroutines block forever. This is\n  a one-time leak at process shutdown (not per-request/per-restart), so low impact,\n  but buffered job/node events in those channels are dropped silently.\n- **M4 — `metricstore.Shutdown()` is not idempotent** (`metricstore.go:274-321`):\n  `shutdownFunc` is not nil'd after use and a second call would re-run\n  `ToCheckpointWAL` + `RotateWALFilesAfterShutdown`. Currently only called once\n  (`server.go:484`), so latent only.\n\n---\n\n## Remediation plan (recommended order)\n\n1. **F1** — initialize auth in the disabled case (call `auth.Init(nil)` on the\n   startup path when `DisableAuthentication` is true), then smoke-test\n   `-server -dev` with `disable-authentication: true`. Critical, small change in\n   `cmd/cc-backend/main.go`.\n2. **F2** — run the graceful-shutdown sequence on the `runServer` error path before\n   returning. Small change in `cmd/cc-backend/main.go`.\n3. **M1–M4** — opportunistic hardening (log ignored errors; close NATS API\n   channels with a stop signal; balance archiver `Done()`; nil `shutdownFunc`).\n\nEach fix must respect the change-impact rules in CLAUDE.md (trace callers, check\ngoroutine/channel lifecycle).\n\n## Verification\n\n- Build: `go build ./...`; `go vet ./...`.\n- F1: start with a config containing `\"disable-authentication\": true` and\n  `-server -dev`; confirm the server starts and serves `/` without the\n  \"Authentication module not initialized!\" fatal. Re-confirm a normal\n  auth-enabled start still works (login flow).\n- F2: force a startup failure (e.g. bind an already-used `addr`, or point\n  `https-cert-file` at a missing file) and confirm the metricstore writes its\n  final checkpoint / rotates WAL before exit (check logs + `var/checkpoints`).\n- Regression: `go test ./...` (esp. `./pkg/metricstore/...`, `./internal/archiver/...`).\n\n---\n\n## Rejected during verification (false positives — do not chase)\n\n- **\"DB migration runs before Connect(), causing multiple connections / lock\n  contention.\"** `handleDatabaseCommands` (`main.go:139-168`) only acts when\n  `-migrate-db`/`-revert-db`/`-force-db` is set, and each path ends in\n  `cclog.Exitf` (process exits). In normal server startup it is a no-op. Not an issue.\n- **\"`GetUserRepository()`/`GetConnection()` called before `Connect()`.\"** Order in\n  `run()` is correct: `initDatabase()` (`main.go:512`) precedes both\n  `flagOptimizeDB` (`:518`) and `handleUserCommands` (`:531`).\n- **Archiver \"double-Start\", \"TriggerArchiving before Start\", \"nil `workerDone`\n  panic\".** `Start` is called exactly once (`main.go:377`) before any trigger; the\n  worker `Done()` accounting on the normal/error paths is actually correct\n  (`archiveWorker.go:128-168`). Only the timeout edge (M2) is real.\n- **\"NatsAPI 10 goroutine leaks per restart cycle.\"** There is one process\n  lifetime per run; it is a single shutdown-time leak (M3), not per-restart.\n- **NATS-close-before-ctx-cancel \"panic / mass data loss\".** `nc.Close()`\n  (`server.go:461`) stops callbacks before `metricstore.Shutdown()` runs; the\n  `walShuttingDown` guard in `SendWALMessage` (`walCheckpoint.go:150-164`) prevents\n  send-on-closed-channel, and buffered `msgs` are drained when the ctx is cancelled.\n  Minor at most, not critical.\n","structuredPatch":[{"oldStart":1,"oldLines":113,"newStart":1,"newLines":141,"lines":["-# Fix: WAL files are never reset on shutdown (continuous growth across restarts)","+# Code Review — Initialization, Startup & Shutdown (critical/severe focus)"," "," ## Context"," ","-The metric store (`pkg/metricstore`) uses a WAL + periodic binary-snapshot","-checkpoint scheme for crash recovery. Each host has an append-only","-`checkpoints/<cluster>/<host>/current.wal` that records every metric write, plus","-periodic `<ts>.bin` full-tree snapshots. On startup the newest `.bin` is loaded","-and `current.wal` is replayed on top.","+Requested: a thorough review of cc-backend focused on **critical and severe**","+issues, starting with the initialization / startup / shutdown paths","+(`cmd/cc-backend/main.go`, `cmd/cc-backend/server.go`, and the subsystem","+`Init`/`Start`/`Shutdown` functions). Three exploration passes were run; their","+findings were then **verified against the actual code** — many reported items were","+theoretical or did not occur in the real call flow and are listed as rejected at","+the bottom so they are not re-investigated."," ","-A `current.wal` is only meant to hold writes *since the last snapshot*. Once a","-snapshot is written, the WAL is redundant and must be rotated (deleted). The user","-reports that WAL files are never reset and grow without bound after a start.","+This file is a review report plus a prioritized remediation plan. The previously","+applied WAL-on-shutdown fix (`metricstore.Shutdown` now rotates WAL via","+`RotateWALFilesAfterShutdown`) is already merged and is **not** re-listed."," ","-## Root cause","+---"," ","-WAL rotation happens in exactly these places today:","+## VERIFIED findings"," ","-1. **Periodic checkpoint** — `Checkpointing()` in `pkg/metricstore/checkpoint.go:128-145`","-   writes snapshots via `ToCheckpointWAL`, then calls `RotateWALFiles(hostDirs)`","-   for the hosts that got a fresh snapshot. This path works, but the default","-   `checkpoint-interval` is **12h**, so the WAL grows for up to 12h between resets.","-2. **Force-rotate on size** — in `WALStaging`/`processMsg`","-   (`pkg/metricstore/walCheckpoint.go:255`) when `ws.size >= MaxWALSize`. But","-   `MaxWALSize` (`config.go:69`) defaults to `0` = unlimited, so this never fires","-   unless explicitly configured.","-3. **Shutdown** — `Shutdown()` in `pkg/metricstore/metricstore.go:310-315`.","+### F1 — CRITICAL: `disable-authentication: true` aborts the server on startup","+The server unconditionally requires an initialized auth instance, but auth is","+only initialized when authentication is **enabled**."," ","-The **shutdown path is broken**. It writes a final snapshot but never rotates the","-WAL:","+- `auth.Init(...)` is called *only* inside the `if !config.Keys.DisableAuthentication`","+  block — `cmd/cc-backend/main.go:175-181` (the only two call sites, confirmed by grep).","+- `auth.GetAuthInstance()` is called **unconditionally** during server init:","+  - `cmd/cc-backend/server.go:123` (`authHandle := auth.GetAuthInstance()`)","+  - `internal/api/rest.go:72` via `api.New()` (`cmd/cc-backend/server.go:184`)","+- `GetAuthInstance()` calls `cclog.Fatal(\"Authentication module not initialized!\")`","+  when `authInstance == nil` — `internal/auth/auth.go:258-264`."," ","-```go","-if Keys.Checkpoints.FileFormat == \"wal\" {","-    // WAL files are deleted per-host inside ToCheckpointWAL workers.   <-- FALSE","-    files, _, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())","-}","-```","+Result: with `disable-authentication: true` and `-server`, the process hard-aborts","+at startup. The flag is otherwise honored in 7 places in `server.go`, so it is a","+supported configuration that is currently broken. Default deployments","+(auth enabled) are unaffected, which is why it has gone unnoticed."," ","-- The comment is incorrect: `ToCheckpointWAL` / `toCheckpointBinary`","-  (`walCheckpoint.go:667`, `:768`) only write `.bin` snapshots; they do **not**","-  touch `current.wal`.","-- The second return value (`successDirs` — hosts that got a fresh snapshot) is","-  discarded with `_`.","-- The purpose-built helper `RotateWALFilesAfterShutdown(hostDirs)`","-  (`walCheckpoint.go:406`), which directly `os.Remove`s `current.wal` files after","-  the staging goroutines have exited, is **defined but never called** (verified by","-  grep across `cmd/`, `internal/`, `pkg/`).","+**Fix direction**: ensure auth is always initialized, or guard the unconditional","+callers. Cleanest: when `config.Keys.DisableAuthentication` is true, still call","+`auth.Init(nil)` (it sets up a session store and returns early without","+authenticators — `auth.go:181-206`), OR make `GetAuthInstance()` callers tolerate","+a nil instance when auth is disabled. Preferred: call `auth.Init(nil)` for the","+disabled case in `handleUserCommands`/startup so `authInstance` is non-nil. Verify","+no auth-enabled-only middleware is wired when disabled (it already is guarded)."," ","-Consequence: after each clean shutdown the `current.wal` files remain on disk. On","-the next startup they are replayed (redundantly, since the `.bin` already has that","-data) and then **appended to again** (the staging goroutine opens the existing","-file with `O_APPEND`). Across restarts the WAL grows monotonically and is only","-ever reset if a 12h periodic checkpoint happens to run. This is the reported","-\"not reset / continuously grows after a start\" behavior.","+### F2 — SEVERE: startup-error path skips graceful shutdown","+In `runServer` (`cmd/cc-backend/main.go:392-463`), if `srv.Start` returns an error","+(e.g. port in use, `tls.LoadX509KeyPair` failure, privileged-port bind), the error","+is delivered on `errChan`, the `select` returns it, `run()` returns, and `main()`","+calls `os.Exit(1)` (`main.go:589-594`)."," ","-Note on ordering: in `Shutdown()` the WAL staging goroutines are already stopped","-(channels closed + `WaitForWALStagingDrain()`) *before* the final","-`ToCheckpointWAL`. So the channel-based `RotateWALFiles` is unsafe here — that is","-exactly why the direct-removal `RotateWALFilesAfterShutdown` variant exists.","+- The graceful-shutdown sequence (`metricstore.Shutdown()` final checkpoint + WAL","+  rotation, `archiver.Shutdown()`, `taskmanager.Shutdown()`) lives only in the","+  signal-handler goroutine (`main.go:406-418`), which is unblocked via `ctx.Done()`","+  from the deferred `cancel()` (`main.go:584`) — but `os.Exit(1)` races ahead and","+  the process dies before that goroutine runs.","+- The metricstore background goroutines started in `metricstore.Init`","+  (`Retention`, `Checkpointing`, `WALStaging`, `ReceiveNats`) are tied to the","+  store's own internal context and are never cancelled on this path."," ","-## Fix","+Practical data-loss risk is low (the listener fails at startup before any ingest),","+but \"graceful shutdown\" is silently not performed on the error path, and it is a","+latent correctness gap if `Serve` ever returns mid-run."," ","-In `pkg/metricstore/metricstore.go`, `Shutdown()` (the `FileFormat == \"wal\"`","-branch, ~line 310): capture the `successDirs` return from `ToCheckpointWAL` and","-rotate those WAL files after the snapshot is durably written.","+**Fix direction**: on the error return from `runServer`, invoke the same shutdown","+sequence (or trigger the signal goroutine and wait for `waitDone`) before","+returning, so the final checkpoint runs."," ","-```go","-if Keys.Checkpoints.FileFormat == \"wal\" {","-    var successDirs []string","-    files, successDirs, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())","-    // Staging goroutines have already exited, so remove the now-redundant","-    // current.wal files directly (channel-based RotateWALFiles is unsafe here).","-    RotateWALFilesAfterShutdown(successDirs)","-} else {","-    files, err = ms.ToCheckpoint(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())","-}","-```","+---"," ","-Rotate **only `successDirs`** (hosts that received a fresh snapshot), mirroring the","-periodic path. A host that produced no snapshot (`ErrNoNewArchiveData`) had no new","-unarchived data for the window, so its WAL is left untouched to avoid dropping any","-record not yet captured by a snapshot. Remove/replace the misleading comment.","+## Lower-severity (worth fixing, not blocking)"," ","-### Files","-- `pkg/metricstore/metricstore.go` — `Shutdown()` WAL branch (only change needed).","+- **M1 — port-80 redirect goroutine swallows its error** (`server.go:417-419`):","+  `go func(){ http.ListenAndServe(\":80\", ...) }()` ignores the returned error; a","+  failed bind on :80 is completely silent. Log it.","+- **M2 — archiver shutdown leaks its waiter goroutine and skips a `Done()` on","+  timeout** (`internal/archiver/archiveWorker.go:222-249`, `:115-117`): on the","+  timeout branch `shutdownCancel()` makes the worker `return` without","+  `archivePending.Done()` for the in-flight job, so the","+  `go func(){ archivePending.Wait(); close(done) }()` goroutine never returns.","+  Only happens during shutdown timeout (process exiting), so impact is bounded.","+- **M3 — NATS API workers/channels not closed on shutdown**","+  (`internal/api/nats.go` — `jobWorker`/`nodeWorker` loop over `jobCh`/`nodeCh`,","+  never closed; created at `server.go:330-333`): goroutines block forever. This is","+  a one-time leak at process shutdown (not per-request/per-restart), so low impact,","+  but buffered job/node events in those channels are dropped silently.","+- **M4 — `metricstore.Shutdown()` is not idempotent** (`metricstore.go:274-321`):","+  `shutdownFunc` is not nil'd after use and a second call would re-run","+  `ToCheckpointWAL` + `RotateWALFilesAfterShutdown`. Currently only called once","+  (`server.go:484`), so latent only."," ","-### Reused existing code","-- `RotateWALFilesAfterShutdown([]string)` — `pkg/metricstore/walCheckpoint.go:406`","-  (already implemented; just needs to be wired in).","-- `successDirs` return of `ToCheckpointWAL` — `walCheckpoint.go:667`.","+---"," ","+## Remediation plan (recommended order)","+","+1. **F1** — initialize auth in the disabled case (call `auth.Init(nil)` on the","+   startup path when `DisableAuthentication` is true), then smoke-test","+   `-server -dev` with `disable-authentication: true`. Critical, small change in","+   `cmd/cc-backend/main.go`.","+2. **F2** — run the graceful-shutdown sequence on the `runServer` error path before","+   returning. Small change in `cmd/cc-backend/main.go`.","+3. **M1–M4** — opportunistic hardening (log ignored errors; close NATS API","+   channels with a stop signal; balance archiver `Done()`; nil `shutdownFunc`).","+","+Each fix must respect the change-impact rules in CLAUDE.md (trace callers, check","+goroutine/channel lifecycle).","+"," ## Verification"," ","-1. Build: `go build ./...`","-2. Targeted unit test (add to `pkg/metricstore`): write a few metrics so a host","-   WAL exists, run a checkpoint + `Shutdown()` equivalent, then assert","-   `current.wal` no longer exists (or is recreated empty) for hosts that were","-   snapshotted. Run `go test ./pkg/metricstore/...`.","-3. Manual end-to-end:","-   - Configure `checkpoints.file-format: \"wal\"` (default) with a short","-     `checkpoint-interval` is *not* required for this test.","-   - Start `cc-backend`, ingest some metrics, confirm","-     `var/checkpoints/<cluster>/<host>/current.wal` grows.","-   - Stop the server (graceful shutdown) and confirm a new `<ts>.bin` appears and","-     `current.wal` is gone for active hosts.","-   - Restart, ingest more, stop again — confirm the WAL does not accumulate the","-     previous run's bytes (size resets each clean shutdown rather than growing","-     monotonically).","+- Build: `go build ./...`; `go vet ./...`.","+- F1: start with a config containing `\"disable-authentication\": true` and","+  `-server -dev`; confirm the server starts and serves `/` without the","+  \"Authentication module not initialized!\" fatal. Re-confirm a normal","+  auth-enabled start still works (login flow).","+- F2: force a startup failure (e.g. bind an already-used `addr`, or point","+  `https-cert-file` at a missing file) and confirm the metricstore writes its","+  final checkpoint / rotates WAL before exit (check logs + `var/checkpoints`).","+- Regression: `go test ./...` (esp. `./pkg/metricstore/...`, `./internal/archiver/...`)."," ","-## Out of scope / follow-ups (mention only)","-- The 12h default `checkpoint-interval` still bounds in-run WAL growth; operators","-  who want tighter bounds can lower it or set `checkpoints.max-wal-size`. No code","-  change proposed here unless requested.","+---","+","+## Rejected during verification (false positives — do not chase)","+","+- **\"DB migration runs before Connect(), causing multiple connections / lock","+  contention.\"** `handleDatabaseCommands` (`main.go:139-168`) only acts when","+  `-migrate-db`/`-revert-db`/`-force-db` is set, and each path ends in","+  `cclog.Exitf` (process exits). In normal server startup it is a no-op. Not an issue.","+- **\"`GetUserRepository()`/`GetConnection()` called before `Connect()`.\"** Order in","+  `run()` is correct: `initDatabase()` (`main.go:512`) precedes both","+  `flagOptimizeDB` (`:518`) and `handleUserCommands` (`:531`).","+- **Archiver \"double-Start\", \"TriggerArchiving before Start\", \"nil `workerDone`","+  panic\".** `Start` is called exactly once (`main.go:377`) before any trigger; the","+  worker `Done()` accounting on the normal/error paths is actually correct","+  (`archiveWorker.go:128-168`). Only the timeout edge (M2) is real.","+- **\"NatsAPI 10 goroutine leaks per restart cycle.\"** There is one process","+  lifetime per run; it is a single shutdown-time leak (M3), not per-restart.","+- **NATS-close-before-ctx-cancel \"panic / mass data loss\".** `nc.Close()`","+  (`server.go:461`) stops callbacks before `metricstore.Shutdown()` runs; the","+  `walShuttingDown` guard in `SendWALMessage` (`walCheckpoint.go:150-164`) prevents","+  send-on-closed-channel, and buffered `msgs` are drained when the ctx is cancelled.","+  Minor at most, not critical."]}],"originalFile":"# Fix: WAL files are never reset on shutdown (continuous growth across restarts)\n\n## Context\n\nThe metric store (`pkg/metricstore`) uses a WAL + periodic binary-snapshot\ncheckpoint scheme for crash recovery. Each host has an append-only\n`checkpoints/<cluster>/<host>/current.wal` that records every metric write, plus\nperiodic `<ts>.bin` full-tree snapshots. On startup the newest `.bin` is loaded\nand `current.wal` is replayed on top.\n\nA `current.wal` is only meant to hold writes *since the last snapshot*. Once a\nsnapshot is written, the WAL is redundant and must be rotated (deleted). The user\nreports that WAL files are never reset and grow without bound after a start.\n\n## Root cause\n\nWAL rotation happens in exactly these places today:\n\n1. **Periodic checkpoint** — `Checkpointing()` in `pkg/metricstore/checkpoint.go:128-145`\n   writes snapshots via `ToCheckpointWAL`, then calls `RotateWALFiles(hostDirs)`\n   for the hosts that got a fresh snapshot. This path works, but the default\n   `checkpoint-interval` is **12h**, so the WAL grows for up to 12h between resets.\n2. **Force-rotate on size** — in `WALStaging`/`processMsg`\n   (`pkg/metricstore/walCheckpoint.go:255`) when `ws.size >= MaxWALSize`. But\n   `MaxWALSize` (`config.go:69`) defaults to `0` = unlimited, so this never fires\n   unless explicitly configured.\n3. **Shutdown** — `Shutdown()` in `pkg/metricstore/metricstore.go:310-315`.\n\nThe **shutdown path is broken**. It writes a final snapshot but never rotates the\nWAL:\n\n```go\nif Keys.Checkpoints.FileFormat == \"wal\" {\n    // WAL files are deleted per-host inside ToCheckpointWAL workers.   <-- FALSE\n    files, _, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n}\n```\n\n- The comment is incorrect: `ToCheckpointWAL` / `toCheckpointBinary`\n  (`walCheckpoint.go:667`, `:768`) only write `.bin` snapshots; they do **not**\n  touch `current.wal`.\n- The second return value (`successDirs` — hosts that got a fresh snapshot) is\n  discarded with `_`.\n- The purpose-built helper `RotateWALFilesAfterShutdown(hostDirs)`\n  (`walCheckpoint.go:406`), which directly `os.Remove`s `current.wal` files after\n  the staging goroutines have exited, is **defined but never called** (verified by\n  grep across `cmd/`, `internal/`, `pkg/`).\n\nConsequence: after each clean shutdown the `current.wal` files remain on disk. On\nthe next startup they are replayed (redundantly, since the `.bin` already has that\ndata) and then **appended to again** (the staging goroutine opens the existing\nfile with `O_APPEND`). Across restarts the WAL grows monotonically and is only\never reset if a 12h periodic checkpoint happens to run. This is the reported\n\"not reset / continuously grows after a start\" behavior.\n\nNote on ordering: in `Shutdown()` the WAL staging goroutines are already stopped\n(channels closed + `WaitForWALStagingDrain()`) *before* the final\n`ToCheckpointWAL`. So the channel-based `RotateWALFiles` is unsafe here — that is\nexactly why the direct-removal `RotateWALFilesAfterShutdown` variant exists.\n\n## Fix\n\nIn `pkg/metricstore/metricstore.go`, `Shutdown()` (the `FileFormat == \"wal\"`\nbranch, ~line 310): capture the `successDirs` return from `ToCheckpointWAL` and\nrotate those WAL files after the snapshot is durably written.\n\n```go\nif Keys.Checkpoints.FileFormat == \"wal\" {\n    var successDirs []string\n    files, successDirs, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n    // Staging goroutines have already exited, so remove the now-redundant\n    // current.wal files directly (channel-based RotateWALFiles is unsafe here).\n    RotateWALFilesAfterShutdown(successDirs)\n} else {\n    files, err = ms.ToCheckpoint(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n}\n```\n\nRotate **only `successDirs`** (hosts that received a fresh snapshot), mirroring the\nperiodic path. A host that produced no snapshot (`ErrNoNewArchiveData`) had no new\nunarchived data for the window, so its WAL is left untouched to avoid dropping any\nrecord not yet captured by a snapshot. Remove/replace the misleading comment.\n\n### Files\n- `pkg/metricstore/metricstore.go` — `Shutdown()` WAL branch (only change needed).\n\n### Reused existing code\n- `RotateWALFilesAfterShutdown([]string)` — `pkg/metricstore/walCheckpoint.go:406`\n  (already implemented; just needs to be wired in).\n- `successDirs` return of `ToCheckpointWAL` — `walCheckpoint.go:667`.\n\n## Verification\n\n1. Build: `go build ./...`\n2. Targeted unit test (add to `pkg/metricstore`): write a few metrics so a host\n   WAL exists, run a checkpoint + `Shutdown()` equivalent, then assert\n   `current.wal` no longer exists (or is recreated empty) for hosts that were\n   snapshotted. Run `go test ./pkg/metricstore/...`.\n3. Manual end-to-end:\n   - Configure `checkpoints.file-format: \"wal\"` (default) with a short\n     `checkpoint-interval` is *not* required for this test.\n   - Start `cc-backend`, ingest some metrics, confirm\n     `var/checkpoints/<cluster>/<host>/current.wal` grows.\n   - Stop the server (graceful shutdown) and confirm a new `<ts>.bin` appears and\n     `current.wal` is gone for active hosts.\n   - Restart, ingest more, stop again — confirm the WAL does not accumulate the\n     previous run's bytes (size resets each clean shutdown rather than growing\n     monotonically).\n\n## Out of scope / follow-ups (mention only)\n- The 12h default `checkpoint-interval` still bounds in-run WAL growth; operators\n  who want tighter bounds can lower it or set `checkpoints.max-wal-size`. No code\n  change proposed here unless requested.\n","userModified":false},"sourceToolAssistantUUID":"bf1f1bbf-50bf-4e37-a248-d1b357aca920","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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+{"parentUuid":"cfe4ff49-45fc-428d-8548-9d4cf99b6f84","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_018ozGcYZ28KRYKPy2D16bDG","type":"message","role":"assistant","content":[{"type":"thinking","thinking":"","signature":"ErMCCmMIDhgCKkD6v6yJzMKvHMlB2ZylkD086KQe0lFoVbCpcs5C6TaqtdOQQPkAsvYPlavMZdoK6u/dqzOmuTe5whyQPXohQ4p2Mg9jbGF1ZGUtb3B1cy00LTg4AEIIdGhpbmtpbmcSDI0IK6+9aRKkTLnfNRoMTyLAVdahnnpwQhtTIjBOEOJ1C/BklfGhXVHwivAHh6dwm5ivqsVOlL9jzF7qYKUyh5SN1ICCS4qTVcMBzzwqfilaIlEogc6QMjPknSjss3LBdIEMlvaBD/aCCoOxomQWoPsVB0VRZmh9gW4U4uCEi4mReUj85OoZRNBV7JkjBQJ/yStjQTeZW8K1GPu6eHuNjyT2iIlCkx+l85V++j4o30M4ZvP8gyAuHPaKMYgfX7kW8N0tSfADDZX9VBdNPRgB"}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":3546,"cache_read_input_tokens":167589,"output_tokens":1064,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":3546,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":2,"output_tokens":1064,"cache_read_input_tokens":167589,"cache_creation_input_tokens":3546,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":3546},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011CbjiNoYiRnktw4m3yGWr6","type":"assistant","uuid":"901ba5be-4426-4ee7-9dc2-71f090b14ac4","timestamp":"2026-06-05T07:25:18.830Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"901ba5be-4426-4ee7-9dc2-71f090b14ac4","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_018ozGcYZ28KRYKPy2D16bDG","type":"message","role":"assistant","content":[{"type":"text","text":"I completed the focused review. Here's the summary.\n\n## Code review: init / startup / shutdown\n\nI ran three exploration passes and then **verified every high-impact claim against the code** — the agents over-reported, so I've separated what's real from what isn't.\n\n### 🔴 F1 — CRITICAL: `disable-authentication: true` aborts the server on startup\nAuth is initialized **only when authentication is enabled** (`auth.Init` is inside `if !DisableAuthentication`, `main.go:175-181`), but the server **unconditionally** requires it:\n- `server.go:123` → `auth.GetAuthInstance()`\n- `server.go:184` → `api.New()` → `rest.go:72` → `auth.GetAuthInstance()`\n\n`GetAuthInstance()` does `cclog.Fatal(...)` when the instance is nil (`auth.go:258-264`). So with `disable-authentication: true` + `-server`, the process hard-aborts. The flag is honored in 7 other places in `server.go`, so it's a supported-but-broken config. Default (auth-enabled) deployments are fine — which is why it slipped through.\n\n### 🟠 F2 — SEVERE: startup-error path skips graceful shutdown\nIf `srv.Start` fails (port in use, bad TLS cert, privileged bind), `runServer` returns the error and `main()` calls `os.Exit(1)` — racing ahead of the signal-handler goroutine that performs `metricstore.Shutdown()` (final checkpoint + WAL rotation), `archiver.Shutdown()`, `taskmanager.Shutdown()`. So no graceful shutdown happens on the error path. Practical data loss is low (fails before ingest), but it's a real correctness gap.\n\n### 🟡 Lower severity (hardening)\n- **M1** `server.go:417-419` — :80 redirect goroutine swallows its `ListenAndServe` error (silent bind failure).\n- **M2** `archiveWorker.go:115-117,222-249` — shutdown-timeout branch skips an `archivePending.Done()` and leaks the waiter goroutine (shutdown-only).\n- **M3** `internal/api/nats.go` — NATS API workers/`jobCh`/`nodeCh` never closed; one-time leak + silent drop of buffered events at shutdown.\n- **M4** `metricstore.go:274-321` — `Shutdown()` not idempotent (`shutdownFunc` not nil'd); latent, only called once today.\n\n### Rejected as false positives (verified, don't chase)\nDB-migration-before-Connect (flag-gated, exits), `GetUserRepository` before `Connect` (ordering is correct), archiver double-Start/nil-channel panics (Start called once), \"10 goroutine leaks per restart\" (one process lifetime), and NATS-close panic/mass-loss (guarded by `walShuttingDown`).\n\nFull report with file:line evidence and a remediation plan is in the plan file."}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":3546,"cache_read_input_tokens":167589,"output_tokens":1064,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":3546,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":2,"output_tokens":1064,"cache_read_input_tokens":167589,"cache_creation_input_tokens":3546,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":3546},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011CbjiNoYiRnktw4m3yGWr6","type":"assistant","uuid":"967f84c7-9da4-4e36-a29b-8abae7bdc315","timestamp":"2026-06-05T07:25:22.248Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"967f84c7-9da4-4e36-a29b-8abae7bdc315","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_018ozGcYZ28KRYKPy2D16bDG","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01JWGkuNgyyaVHdbJtT3DeML","name":"ExitPlanMode","input":{"plan":"# Code Review — Initialization, Startup & Shutdown (critical/severe focus)\n\n## Context\n\nRequested: a thorough review of cc-backend focused on **critical and severe**\nissues, starting with the initialization / startup / shutdown paths\n(`cmd/cc-backend/main.go`, `cmd/cc-backend/server.go`, and the subsystem\n`Init`/`Start`/`Shutdown` functions). Three exploration passes were run; their\nfindings were then **verified against the actual code** — many reported items were\ntheoretical or did not occur in the real call flow and are listed as rejected at\nthe bottom so they are not re-investigated.\n\nThis file is a review report plus a prioritized remediation plan. The previously\napplied WAL-on-shutdown fix (`metricstore.Shutdown` now rotates WAL via\n`RotateWALFilesAfterShutdown`) is already merged and is **not** re-listed.\n\n---\n\n## VERIFIED findings\n\n### F1 — CRITICAL: `disable-authentication: true` aborts the server on startup\nThe server unconditionally requires an initialized auth instance, but auth is\nonly initialized when authentication is **enabled**.\n\n- `auth.Init(...)` is called *only* inside the `if !config.Keys.DisableAuthentication`\n  block — `cmd/cc-backend/main.go:175-181` (the only two call sites, confirmed by grep).\n- `auth.GetAuthInstance()` is called **unconditionally** during server init:\n  - `cmd/cc-backend/server.go:123` (`authHandle := auth.GetAuthInstance()`)\n  - `internal/api/rest.go:72` via `api.New()` (`cmd/cc-backend/server.go:184`)\n- `GetAuthInstance()` calls `cclog.Fatal(\"Authentication module not initialized!\")`\n  when `authInstance == nil` — `internal/auth/auth.go:258-264`.\n\nResult: with `disable-authentication: true` and `-server`, the process hard-aborts\nat startup. The flag is otherwise honored in 7 places in `server.go`, so it is a\nsupported configuration that is currently broken. Default deployments\n(auth enabled) are unaffected, which is why it has gone unnoticed.\n\n**Fix direction**: ensure auth is always initialized, or guard the unconditional\ncallers. Cleanest: when `config.Keys.DisableAuthentication` is true, still call\n`auth.Init(nil)` (it sets up a session store and returns early without\nauthenticators — `auth.go:181-206`), OR make `GetAuthInstance()` callers tolerate\na nil instance when auth is disabled. Preferred: call `auth.Init(nil)` for the\ndisabled case in `handleUserCommands`/startup so `authInstance` is non-nil. Verify\nno auth-enabled-only middleware is wired when disabled (it already is guarded).\n\n### F2 — SEVERE: startup-error path skips graceful shutdown\nIn `runServer` (`cmd/cc-backend/main.go:392-463`), if `srv.Start` returns an error\n(e.g. port in use, `tls.LoadX509KeyPair` failure, privileged-port bind), the error\nis delivered on `errChan`, the `select` returns it, `run()` returns, and `main()`\ncalls `os.Exit(1)` (`main.go:589-594`).\n\n- The graceful-shutdown sequence (`metricstore.Shutdown()` final checkpoint + WAL\n  rotation, `archiver.Shutdown()`, `taskmanager.Shutdown()`) lives only in the\n  signal-handler goroutine (`main.go:406-418`), which is unblocked via `ctx.Done()`\n  from the deferred `cancel()` (`main.go:584`) — but `os.Exit(1)` races ahead and\n  the process dies before that goroutine runs.\n- The metricstore background goroutines started in `metricstore.Init`\n  (`Retention`, `Checkpointing`, `WALStaging`, `ReceiveNats`) are tied to the\n  store's own internal context and are never cancelled on this path.\n\nPractical data-loss risk is low (the listener fails at startup before any ingest),\nbut \"graceful shutdown\" is silently not performed on the error path, and it is a\nlatent correctness gap if `Serve` ever returns mid-run.\n\n**Fix direction**: on the error return from `runServer`, invoke the same shutdown\nsequence (or trigger the signal goroutine and wait for `waitDone`) before\nreturning, so the final checkpoint runs.\n\n---\n\n## Lower-severity (worth fixing, not blocking)\n\n- **M1 — port-80 redirect goroutine swallows its error** (`server.go:417-419`):\n  `go func(){ http.ListenAndServe(\":80\", ...) }()` ignores the returned error; a\n  failed bind on :80 is completely silent. Log it.\n- **M2 — archiver shutdown leaks its waiter goroutine and skips a `Done()` on\n  timeout** (`internal/archiver/archiveWorker.go:222-249`, `:115-117`): on the\n  timeout branch `shutdownCancel()` makes the worker `return` without\n  `archivePending.Done()` for the in-flight job, so the\n  `go func(){ archivePending.Wait(); close(done) }()` goroutine never returns.\n  Only happens during shutdown timeout (process exiting), so impact is bounded.\n- **M3 — NATS API workers/channels not closed on shutdown**\n  (`internal/api/nats.go` — `jobWorker`/`nodeWorker` loop over `jobCh`/`nodeCh`,\n  never closed; created at `server.go:330-333`): goroutines block forever. This is\n  a one-time leak at process shutdown (not per-request/per-restart), so low impact,\n  but buffered job/node events in those channels are dropped silently.\n- **M4 — `metricstore.Shutdown()` is not idempotent** (`metricstore.go:274-321`):\n  `shutdownFunc` is not nil'd after use and a second call would re-run\n  `ToCheckpointWAL` + `RotateWALFilesAfterShutdown`. Currently only called once\n  (`server.go:484`), so latent only.\n\n---\n\n## Remediation plan (recommended order)\n\n1. **F1** — initialize auth in the disabled case (call `auth.Init(nil)` on the\n   startup path when `DisableAuthentication` is true), then smoke-test\n   `-server -dev` with `disable-authentication: true`. Critical, small change in\n   `cmd/cc-backend/main.go`.\n2. **F2** — run the graceful-shutdown sequence on the `runServer` error path before\n   returning. Small change in `cmd/cc-backend/main.go`.\n3. **M1–M4** — opportunistic hardening (log ignored errors; close NATS API\n   channels with a stop signal; balance archiver `Done()`; nil `shutdownFunc`).\n\nEach fix must respect the change-impact rules in CLAUDE.md (trace callers, check\ngoroutine/channel lifecycle).\n\n## Verification\n\n- Build: `go build ./...`; `go vet ./...`.\n- F1: start with a config containing `\"disable-authentication\": true` and\n  `-server -dev`; confirm the server starts and serves `/` without the\n  \"Authentication module not initialized!\" fatal. Re-confirm a normal\n  auth-enabled start still works (login flow).\n- F2: force a startup failure (e.g. bind an already-used `addr`, or point\n  `https-cert-file` at a missing file) and confirm the metricstore writes its\n  final checkpoint / rotates WAL before exit (check logs + `var/checkpoints`).\n- Regression: `go test ./...` (esp. `./pkg/metricstore/...`, `./internal/archiver/...`).\n\n---\n\n## Rejected during verification (false positives — do not chase)\n\n- **\"DB migration runs before Connect(), causing multiple connections / lock\n  contention.\"** `handleDatabaseCommands` (`main.go:139-168`) only acts when\n  `-migrate-db`/`-revert-db`/`-force-db` is set, and each path ends in\n  `cclog.Exitf` (process exits). In normal server startup it is a no-op. Not an issue.\n- **\"`GetUserRepository()`/`GetConnection()` called before `Connect()`.\"** Order in\n  `run()` is correct: `initDatabase()` (`main.go:512`) precedes both\n  `flagOptimizeDB` (`:518`) and `handleUserCommands` (`:531`).\n- **Archiver \"double-Start\", \"TriggerArchiving before Start\", \"nil `workerDone`\n  panic\".** `Start` is called exactly once (`main.go:377`) before any trigger; the\n  worker `Done()` accounting on the normal/error paths is actually correct\n  (`archiveWorker.go:128-168`). Only the timeout edge (M2) is real.\n- **\"NatsAPI 10 goroutine leaks per restart cycle.\"** There is one process\n  lifetime per run; it is a single shutdown-time leak (M3), not per-restart.\n- **NATS-close-before-ctx-cancel \"panic / mass data loss\".** `nc.Close()`\n  (`server.go:461`) stops callbacks before `metricstore.Shutdown()` runs; the\n  `walShuttingDown` guard in `SendWALMessage` (`walCheckpoint.go:150-164`) prevents\n  send-on-closed-channel, and buffered `msgs` are drained when the ctx is cancelled.\n  Minor at most, not critical.\n","planFilePath":"/Users/jan/.claude/plans/this-application-uses-a-shiny-flame.md"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":3546,"cache_read_input_tokens":167589,"output_tokens":1064,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":3546,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":2,"output_tokens":1064,"cache_read_input_tokens":167589,"cache_creation_input_tokens":3546,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":3546},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011CbjiNoYiRnktw4m3yGWr6","type":"assistant","uuid":"978c543b-8738-44dc-9418-e435dd5dee7c","timestamp":"2026-06-05T07:25:22.250Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"978c543b-8738-44dc-9418-e435dd5dee7c","isSidechain":false,"promptId":"e03eec5c-111d-4cd6-a2ad-e4499d1dc6b1","type":"user","message":{"role":"user","content":[{"type":"tool_result","content":"The user doesn't want to proceed with this tool use. The tool use was rejected (eg. if it was a file edit, the new_string was NOT written to the file). To tell you how to proceed, the user said:\nFix all issues in the suggested order","is_error":true,"tool_use_id":"toolu_01JWGkuNgyyaVHdbJtT3DeML"}]},"uuid":"e62bc627-77bf-4ef3-a660-16202ee993e9","timestamp":"2026-06-05T07:37:10.037Z","toolUseResult":"Error: The user doesn't want to proceed with this tool use. The tool use was rejected (eg. if it was a file edit, the new_string was NOT written to the file). To tell you how to proceed, the user said:\nFix all issues in the suggested order","sourceToolAssistantUUID":"978c543b-8738-44dc-9418-e435dd5dee7c","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"e62bc627-77bf-4ef3-a660-16202ee993e9","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_01W41y1cKAnsb78TRRh2gTgJ","type":"message","role":"assistant","content":[{"type":"text","text":"I'll fix the issues in order. Let me start with F1 and F2, then the hardening items. Let me read the exact code sections I need to modify."}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":1152,"cache_read_input_tokens":171135,"output_tokens":172,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":1152,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":2,"output_tokens":172,"cache_read_input_tokens":171135,"cache_creation_input_tokens":1152,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":1152},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011CbjjJ6WAKi2H4F9p4QZPL","type":"assistant","uuid":"2afe7aae-16d5-4cea-9d29-248f5373227d","timestamp":"2026-06-05T07:37:13.368Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"2946656c-0dc5-48cf-8ab7-065f8459caa6","isSidechain":false,"promptId":"e03eec5c-111d-4cd6-a2ad-e4499d1dc6b1","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01P4QBPgFESAQwbiUJFaeKfG","type":"tool_result","content":"1\t// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n2\t// All rights reserved. This file is part of cc-backend.\n3\t// Use of this source code is governed by a MIT-style\n4\t// license that can be found in the LICENSE file.\n5\t\n6\tpackage api\n7\t\n8\timport (\n9\t\t\"database/sql\"\n10\t\t\"encoding/json\"\n11\t\t\"maps\"\n12\t\t\"strings\"\n13\t\t\"sync\"\n14\t\t\"time\"\n15\t\n16\t\t\"github.com/ClusterCockpit/cc-backend/internal/archiver\"\n17\t\t\"github.com/ClusterCockpit/cc-backend/internal/config\"\n18\t\t\"github.com/ClusterCockpit/cc-backend/internal/importer\"\n19\t\t\"github.com/ClusterCockpit/cc-backend/internal/metricdispatch\"\n20\t\t\"github.com/ClusterCockpit/cc-backend/internal/repository\"\n21\t\t\"github.com/ClusterCockpit/cc-backend/pkg/archive\"\n22\t\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n23\t\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n24\t\tlp \"github.com/ClusterCockpit/cc-lib/v2/ccMessage\"\n25\t\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n26\t\t\"github.com/ClusterCockpit/cc-lib/v2/receivers\"\n27\t\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n28\t\tinflux \"github.com/ClusterCockpit/cc-line-protocol/v2/lineprotocol\"\n29\t)\n30\t\n31\t// natsMessage wraps a raw NATS message with its subject for channel-based processing.\n32\ttype natsMessage struct {\n33\t\tsubject string\n34\t\tdata    []byte\n35\t}\n36\t\n37\t// NatsAPI provides NATS subscription-based handlers for Job and Node operations.\n38\t// It mirrors the functionality of the REST API but uses NATS messaging with\n39\t// InfluxDB line protocol as the message format.\n40\t//\n41\t// # Message Format\n42\t//\n43\t// All NATS messages use InfluxDB line protocol format (https://docs.influxdata.com/influxdb/v2.0/reference/syntax/line-protocol/)\n44\t// with the following structure:\n45\t//\n46\t//\tmeasurement,tag1=value1,tag2=value2 field1=value1,field2=value2 timestamp\n47\t//\n48\t// # Job Events\n49\t//\n50\t// Job start/stop events use the \"job\" measurement with a \"function\" tag to distinguish operations:\n51\t//\n52\t//\tjob,function=start_job event=\"{...JSON payload...}\" <timestamp>\n53\t//\tjob,function=stop_job event=\"{...JSON payload...}\" <timestamp>\n54\t//\n55\t// The JSON payload in the \"event\" field follows the schema.Job or StopJobAPIRequest structure.\n56\t//\n57\t// Example job start message:\n58\t//\n59\t//\tjob,function=start_job event=\"{\\\"jobId\\\":1001,\\\"user\\\":\\\"testuser\\\",\\\"cluster\\\":\\\"testcluster\\\",...}\" 1234567890000000000\n60\t//\n61\t// # Node State Events\n62\t//\n63\t// Node state updates use the \"nodestate\" measurement with cluster information:\n64\t//\n65\t//\tnodestate event=\"{...JSON payload...}\" <timestamp>\n66\t//\n67\t// The JSON payload follows the UpdateNodeStatesRequest structure.\n68\t//\n69\t// Example node state message:\n70\t//\n71\t//\tnodestate event=\"{\\\"cluster\\\":\\\"testcluster\\\",\\\"nodes\\\":[{\\\"hostname\\\":\\\"node01\\\",\\\"states\\\":[\\\"idle\\\"]}]}\" 1234567890000000000\n72\ttype NatsAPI struct {\n73\t\tJobRepository *repository.JobRepository\n74\t\t// RepositoryMutex protects job creation operations from race conditions\n75\t\t// when checking for duplicate jobs during startJob calls.\n76\t\tRepositoryMutex sync.Mutex\n77\t\t// jobCh receives job event messages for processing by worker goroutines.\n78\t\tjobCh chan natsMessage\n79\t\t// nodeCh receives node state messages for processing by worker goroutines.\n80\t\tnodeCh chan natsMessage\n81\t}\n82\t\n83\t// NewNatsAPI creates a new NatsAPI instance with channel-based worker pools.\n84\t// Concurrency is configured via NATSConfig (defaults: JobConcurrency=8, NodeConcurrency=2).\n85\tfunc NewNatsAPI() *NatsAPI {\n86\t\tjobConc := 8\n87\t\tnodeConc := 2\n88\t\n89\t\tif s := config.Keys.APISubjects; s != nil {\n90\t\t\tif s.JobConcurrency > 0 {\n91\t\t\t\tjobConc = s.JobConcurrency\n92\t\t\t}\n93\t\t\tif s.NodeConcurrency > 0 {\n94\t\t\t\tnodeConc = s.NodeConcurrency\n95\t\t\t}\n96\t\t}\n97\t\n98\t\tapi := &NatsAPI{\n99\t\t\tJobRepository: repository.GetJobRepository(),\n100\t\t\tjobCh:         make(chan natsMessage, jobConc),\n101\t\t\tnodeCh:        make(chan natsMessage, nodeConc),\n102\t\t}\n103\t\n104\t\t// Start worker goroutines\n105\t\tfor range jobConc {\n106\t\t\tgo api.jobWorker()\n107\t\t}\n108\t\tfor range nodeConc {\n109\t\t\tgo api.nodeWorker()\n110\t\t}\n111\t\n112\t\treturn api\n113\t}\n114\t\n115\t// jobWorker processes job event messages from the job channel.\n116\tfunc (api *NatsAPI) jobWorker() {\n117\t\tfor msg := range api.jobCh {\n118\t\t\tapi.handleJobEvent(msg.subject, msg.data)\n119\t\t}\n120\t}\n121\t\n122\t// nodeWorker processes node state messages from the node channel.\n123\tfunc (api *NatsAPI) nodeWorker() {\n124\t\tfor msg := range api.nodeCh {\n125\t\t\tapi.handleNodeState(msg.subject, msg.data)\n126\t\t}\n127\t}\n128\t\n129\t// StartSubscriptions registers all NATS subscriptions for Job and Node APIs.\n130\t// Messages are delivered to buffered channels and processed by worker goroutines.\n131\t// Returns an error if the NATS client is not available or subscription fails.\n132\tfunc (api *NatsAPI) StartSubscriptions() error {\n133\t\tclient := nats.GetClient()\n134\t\tif client == nil {\n135\t\t\tcclog.Warn(\"NATS client not available, skipping API subscriptions\")\n136\t\t\treturn nil\n137\t\t}\n138\t\n139\t\tif config.Keys.APISubjects != nil {\n140\t\t\ts := config.Keys.APISubjects\n141\t\n142\t\t\tif err := client.Subscribe(s.SubjectJobEvent, func(subject string, data []byte) {\n143\t\t\t\tapi.jobCh <- natsMessage{subject: subject, data: data}\n144\t\t\t}); err != nil {\n145\t\t\t\treturn err\n146\t\t\t}\n147\t\n148\t\t\tif err := client.Subscribe(s.SubjectNodeState, func(subject string, data []byte) {\n149\t\t\t\tapi.nodeCh <- natsMessage{subject: subject, data: data}\n150\t\t\t}); err != nil {\n151\t\t\t\treturn err\n152\t\t\t}\n153\t\n154\t\t\tcclog.Warnf(\"NATS API subscriptions started on subjects %q and %q — these are UNAUTHENTICATED: \"+\n155\t\t\t\t\"anyone with publish rights on the broker can start/stop jobs and update node state. \"+\n156\t\t\t\t\"Restrict publish ACLs on the NATS broker to trusted producers only.\",\n157\t\t\t\ts.SubjectJobEvent, s.SubjectNodeState)\n158\t\t}\n159\t\treturn nil\n160\t}\n161\t\n162\t// processJobEvent routes job event messages to the appropriate handler based on the \"function\" tag.\n163\t// Validates that required tags and fields are present before processing.\n164\tfunc (api *NatsAPI) processJobEvent(msg lp.CCMessage) {\n165\t\tfunction, ok := msg.GetTag(\"function\")\n166\t\tif !ok {\n167\t\t\tcclog.Errorf(\"Job event is missing required tag 'function': measurement=%s\", msg.Name())\n168\t\t\treturn\n169\t\t}\n170\t\n171\t\tswitch function {\n172\t\tcase \"start_job\":\n173\t\t\tv, ok := msg.GetEventValue()\n174\t\t\tif !ok {\n175\t\t\t\tcclog.Errorf(\"Job start event is missing event field with JSON payload\")"}]},"uuid":"8f2f407e-ac25-4c9a-951f-1928cbba48cc","timestamp":"2026-06-05T07:37:14.107Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/api/nats.go","content":"// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n// All rights reserved. This file is part of cc-backend.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\npackage api\n\nimport (\n\t\"database/sql\"\n\t\"encoding/json\"\n\t\"maps\"\n\t\"strings\"\n\t\"sync\"\n\t\"time\"\n\n\t\"github.com/ClusterCockpit/cc-backend/internal/archiver\"\n\t\"github.com/ClusterCockpit/cc-backend/internal/config\"\n\t\"github.com/ClusterCockpit/cc-backend/internal/importer\"\n\t\"github.com/ClusterCockpit/cc-backend/internal/metricdispatch\"\n\t\"github.com/ClusterCockpit/cc-backend/internal/repository\"\n\t\"github.com/ClusterCockpit/cc-backend/pkg/archive\"\n\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n\tlp \"github.com/ClusterCockpit/cc-lib/v2/ccMessage\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/receivers\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n\tinflux \"github.com/ClusterCockpit/cc-line-protocol/v2/lineprotocol\"\n)\n\n// natsMessage wraps a raw NATS message with its subject for channel-based processing.\ntype natsMessage struct {\n\tsubject string\n\tdata    []byte\n}\n\n// NatsAPI provides NATS subscription-based handlers for Job and Node operations.\n// It mirrors the functionality of the REST API but uses NATS messaging with\n// InfluxDB line protocol as the message format.\n//\n// # Message Format\n//\n// All NATS messages use InfluxDB line protocol format (https://docs.influxdata.com/influxdb/v2.0/reference/syntax/line-protocol/)\n// with the following structure:\n//\n//\tmeasurement,tag1=value1,tag2=value2 field1=value1,field2=value2 timestamp\n//\n// # Job Events\n//\n// Job start/stop events use the \"job\" measurement with a \"function\" tag to distinguish operations:\n//\n//\tjob,function=start_job event=\"{...JSON payload...}\" <timestamp>\n//\tjob,function=stop_job event=\"{...JSON payload...}\" <timestamp>\n//\n// The JSON payload in the \"event\" field follows the schema.Job or StopJobAPIRequest structure.\n//\n// Example job start message:\n//\n//\tjob,function=start_job event=\"{\\\"jobId\\\":1001,\\\"user\\\":\\\"testuser\\\",\\\"cluster\\\":\\\"testcluster\\\",...}\" 1234567890000000000\n//\n// # Node State Events\n//\n// Node state updates use the \"nodestate\" measurement with cluster information:\n//\n//\tnodestate event=\"{...JSON payload...}\" <timestamp>\n//\n// The JSON payload follows the UpdateNodeStatesRequest structure.\n//\n// Example node state message:\n//\n//\tnodestate event=\"{\\\"cluster\\\":\\\"testcluster\\\",\\\"nodes\\\":[{\\\"hostname\\\":\\\"node01\\\",\\\"states\\\":[\\\"idle\\\"]}]}\" 1234567890000000000\ntype NatsAPI struct {\n\tJobRepository *repository.JobRepository\n\t// RepositoryMutex protects job creation operations from race conditions\n\t// when checking for duplicate jobs during startJob calls.\n\tRepositoryMutex sync.Mutex\n\t// jobCh receives job event messages for processing by worker goroutines.\n\tjobCh chan natsMessage\n\t// nodeCh receives node state messages for processing by worker goroutines.\n\tnodeCh chan natsMessage\n}\n\n// NewNatsAPI creates a new NatsAPI instance with channel-based worker pools.\n// Concurrency is configured via NATSConfig (defaults: JobConcurrency=8, NodeConcurrency=2).\nfunc NewNatsAPI() *NatsAPI {\n\tjobConc := 8\n\tnodeConc := 2\n\n\tif s := config.Keys.APISubjects; s != nil {\n\t\tif s.JobConcurrency > 0 {\n\t\t\tjobConc = s.JobConcurrency\n\t\t}\n\t\tif s.NodeConcurrency > 0 {\n\t\t\tnodeConc = s.NodeConcurrency\n\t\t}\n\t}\n\n\tapi := &NatsAPI{\n\t\tJobRepository: repository.GetJobRepository(),\n\t\tjobCh:         make(chan natsMessage, jobConc),\n\t\tnodeCh:        make(chan natsMessage, nodeConc),\n\t}\n\n\t// Start worker goroutines\n\tfor range jobConc {\n\t\tgo api.jobWorker()\n\t}\n\tfor range nodeConc {\n\t\tgo api.nodeWorker()\n\t}\n\n\treturn api\n}\n\n// jobWorker processes job event messages from the job channel.\nfunc (api *NatsAPI) jobWorker() {\n\tfor msg := range api.jobCh {\n\t\tapi.handleJobEvent(msg.subject, msg.data)\n\t}\n}\n\n// nodeWorker processes node state messages from the node channel.\nfunc (api *NatsAPI) nodeWorker() {\n\tfor msg := range api.nodeCh {\n\t\tapi.handleNodeState(msg.subject, msg.data)\n\t}\n}\n\n// StartSubscriptions registers all NATS subscriptions for Job and Node APIs.\n// Messages are delivered to buffered channels and processed by worker goroutines.\n// Returns an error if the NATS client is not available or subscription fails.\nfunc (api *NatsAPI) StartSubscriptions() error {\n\tclient := nats.GetClient()\n\tif client == nil {\n\t\tcclog.Warn(\"NATS client not available, skipping API subscriptions\")\n\t\treturn nil\n\t}\n\n\tif config.Keys.APISubjects != nil {\n\t\ts := config.Keys.APISubjects\n\n\t\tif err := client.Subscribe(s.SubjectJobEvent, func(subject string, data []byte) {\n\t\t\tapi.jobCh <- natsMessage{subject: subject, data: data}\n\t\t}); err != nil {\n\t\t\treturn err\n\t\t}\n\n\t\tif err := client.Subscribe(s.SubjectNodeState, func(subject string, data []byte) {\n\t\t\tapi.nodeCh <- natsMessage{subject: subject, data: data}\n\t\t}); err != nil {\n\t\t\treturn err\n\t\t}\n\n\t\tcclog.Warnf(\"NATS API subscriptions started on subjects %q and %q — these are UNAUTHENTICATED: \"+\n\t\t\t\"anyone with publish rights on the broker can start/stop jobs and update node state. \"+\n\t\t\t\"Restrict publish ACLs on the NATS broker to trusted producers only.\",\n\t\t\ts.SubjectJobEvent, s.SubjectNodeState)\n\t}\n\treturn nil\n}\n\n// processJobEvent routes job event messages to the appropriate handler based on the \"function\" tag.\n// Validates that required tags and fields are present before processing.\nfunc (api *NatsAPI) processJobEvent(msg lp.CCMessage) {\n\tfunction, ok := msg.GetTag(\"function\")\n\tif !ok {\n\t\tcclog.Errorf(\"Job event is missing required tag 'function': measurement=%s\", msg.Name())\n\t\treturn\n\t}\n\n\tswitch function {\n\tcase \"start_job\":\n\t\tv, ok := msg.GetEventValue()\n\t\tif !ok {\n\t\t\tcclog.Errorf(\"Job start event is missing event field with JSON payload\")","numLines":175,"startLine":1,"totalLines":519}},"sourceToolAssistantUUID":"2946656c-0dc5-48cf-8ab7-065f8459caa6","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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"}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":3001,"cache_read_input_tokens":172287,"output_tokens":4095,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":3001,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":2,"output_tokens":4095,"cache_read_input_tokens":172287,"cache_creation_input_tokens":3001,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":3001},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011CbjjJNhz3PGf37pNgppbc","type":"assistant","uuid":"e6e1d8ce-4522-4435-b0a0-58fb3baa52c9","timestamp":"2026-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+{"parentUuid":"7ef3bbfe-76a4-4e38-9eee-f173b1b7d40c","isSidechain":false,"promptId":"e03eec5c-111d-4cd6-a2ad-e4499d1dc6b1","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01Bkeri3wCHfaZJFDJ3LkNY5","type":"tool_result","content":"1\t// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n2\t// All rights reserved. This file is part of cc-backend.\n3\t// Use of this source code is governed by a MIT-style\n4\t// license that can be found in the LICENSE file.\n5\t\n6\t// Package auth implements various authentication methods\n7\tpackage auth\n8\t\n9\timport (\n10\t\t\"bytes\"\n11\t\t\"context\"\n12\t\t\"database/sql\"\n13\t\t\"encoding/base64\"\n14\t\t\"encoding/json\"\n15\t\t\"errors\"\n16\t\t\"fmt\"\n17\t\t\"net\"\n18\t\t\"net/http\"\n19\t\t\"net/url\"\n20\t\t\"os\"\n21\t\t\"sync\"\n22\t\t\"time\"\n23\t\n24\t\t\"golang.org/x/time/rate\"\n25\t\n26\t\t\"github.com/ClusterCockpit/cc-backend/internal/config\"\n27\t\t\"github.com/ClusterCockpit/cc-backend/internal/repository\"\n28\t\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n29\t\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n30\t\t\"github.com/ClusterCockpit/cc-lib/v2/util\"\n31\t\t\"github.com/gorilla/sessions\"\n32\t)\n33\t\n34\t// Authenticator is the interface for all authentication methods.\n35\t// Each authenticator determines if it can handle a login request (CanLogin)\n36\t// and performs the actual authentication (Login).\n37\ttype Authenticator interface {\n38\t\t// CanLogin determines if this authenticator can handle the login request.\n39\t\t// It returns the user object if available and a boolean indicating if this\n40\t\t// authenticator should attempt the login. This method should not perform\n41\t\t// expensive operations or actual authentication.\n42\t\tCanLogin(user *schema.User, username string, rw http.ResponseWriter, r *http.Request) (*schema.User, bool)\n43\t\n44\t\t// Login performs the actually authentication for the user.\n45\t\t// It returns the authenticated user or an error if authentication fails.\n46\t\t// The user parameter may be nil if the user doesn't exist in the database yet.\n47\t\tLogin(user *schema.User, rw http.ResponseWriter, r *http.Request) (*schema.User, error)\n48\t}\n49\t\n50\tvar (\n51\t\tinitOnce     sync.Once\n52\t\tauthInstance *Authentication\n53\t)\n54\t\n55\t// rateLimiterEntry tracks a rate limiter and its last use time for cleanup\n56\ttype rateLimiterEntry struct {\n57\t\tlimiter  *rate.Limiter\n58\t\tlastUsed time.Time\n59\t}\n60\t\n61\tvar ipUserLimiters sync.Map\n62\t\n63\t// getIPUserLimiter returns a rate limiter for the given IP and username combination.\n64\t// Rate limiters are created on demand and track 5 attempts per 15 minutes.\n65\tfunc getIPUserLimiter(ip, username string) *rate.Limiter {\n66\t\tkey := ip + \":\" + username\n67\t\tnow := time.Now()\n68\t\n69\t\tif entry, ok := ipUserLimiters.Load(key); ok {\n70\t\t\trle := entry.(*rateLimiterEntry)\n71\t\t\trle.lastUsed = now\n72\t\t\treturn rle.limiter\n73\t\t}\n74\t\n75\t\t// More aggressive rate limiting: 5 attempts per 15 minutes\n76\t\tnewLimiter := rate.NewLimiter(rate.Every(15*time.Minute/5), 5)\n77\t\tipUserLimiters.Store(key, &rateLimiterEntry{\n78\t\t\tlimiter:  newLimiter,\n79\t\t\tlastUsed: now,\n80\t\t})\n81\t\treturn newLimiter\n82\t}\n83\t\n84\t// cleanupOldRateLimiters removes rate limiters that haven't been used recently\n85\tfunc cleanupOldRateLimiters(olderThan time.Time) {\n86\t\tipUserLimiters.Range(func(key, value any) bool {\n87\t\t\tentry := value.(*rateLimiterEntry)\n88\t\t\tif entry.lastUsed.Before(olderThan) {\n89\t\t\t\tipUserLimiters.Delete(key)\n90\t\t\t\tcclog.Debugf(\"Cleaned up rate limiter for %v\", key)\n91\t\t\t}\n92\t\t\treturn true\n93\t\t})\n94\t}\n95\t\n96\t// startRateLimiterCleanup starts a background goroutine to clean up old rate limiters\n97\tfunc startRateLimiterCleanup() {\n98\t\tgo func() {\n99\t\t\tticker := time.NewTicker(1 * time.Hour)\n100\t\t\tdefer ticker.Stop()\n101\t\t\tfor range ticker.C {\n102\t\t\t\t// Clean up limiters not used in the last 24 hours\n103\t\t\t\tcleanupOldRateLimiters(time.Now().Add(-24 * time.Hour))\n104\t\t\t}\n105\t\t}()\n106\t}\n107\t\n108\t// AuthConfig contains configuration for all authentication methods\n109\ttype AuthConfig struct {\n110\t\tLdapConfig   *LdapConfig    `json:\"ldap\"`\n111\t\tJwtConfig    *JWTAuthConfig `json:\"jwts\"`\n112\t\tOpenIDConfig *OpenIDConfig  `json:\"oidc\"`\n113\t}\n114\t\n115\t// Keys holds the global authentication configuration\n116\tvar Keys AuthConfig\n117\t\n118\t// Authentication manages all authentication methods and session handling\n119\ttype Authentication struct {\n120\t\tsessionStore   *sessions.CookieStore"}]},"uuid":"1fce955d-3d6f-45a3-b30a-5540536df470","timestamp":"2026-06-05T07:38:06.494Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/auth/auth.go","content":"// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n// All rights reserved. This file is part of cc-backend.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\n// Package auth implements various authentication methods\npackage auth\n\nimport (\n\t\"bytes\"\n\t\"context\"\n\t\"database/sql\"\n\t\"encoding/base64\"\n\t\"encoding/json\"\n\t\"errors\"\n\t\"fmt\"\n\t\"net\"\n\t\"net/http\"\n\t\"net/url\"\n\t\"os\"\n\t\"sync\"\n\t\"time\"\n\n\t\"golang.org/x/time/rate\"\n\n\t\"github.com/ClusterCockpit/cc-backend/internal/config\"\n\t\"github.com/ClusterCockpit/cc-backend/internal/repository\"\n\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/util\"\n\t\"github.com/gorilla/sessions\"\n)\n\n// Authenticator is the interface for all authentication methods.\n// Each authenticator determines if it can handle a login request (CanLogin)\n// and performs the actual authentication (Login).\ntype Authenticator interface {\n\t// CanLogin determines if this authenticator can handle the login request.\n\t// It returns the user object if available and a boolean indicating if this\n\t// authenticator should attempt the login. This method should not perform\n\t// expensive operations or actual authentication.\n\tCanLogin(user *schema.User, username string, rw http.ResponseWriter, r *http.Request) (*schema.User, bool)\n\n\t// Login performs the actually authentication for the user.\n\t// It returns the authenticated user or an error if authentication fails.\n\t// The user parameter may be nil if the user doesn't exist in the database yet.\n\tLogin(user *schema.User, rw http.ResponseWriter, r *http.Request) (*schema.User, error)\n}\n\nvar (\n\tinitOnce     sync.Once\n\tauthInstance *Authentication\n)\n\n// rateLimiterEntry tracks a rate limiter and its last use time for cleanup\ntype rateLimiterEntry struct {\n\tlimiter  *rate.Limiter\n\tlastUsed time.Time\n}\n\nvar ipUserLimiters sync.Map\n\n// getIPUserLimiter returns a rate limiter for the given IP and username combination.\n// Rate limiters are created on demand and track 5 attempts per 15 minutes.\nfunc getIPUserLimiter(ip, username string) *rate.Limiter {\n\tkey := ip + \":\" + username\n\tnow := time.Now()\n\n\tif entry, ok := ipUserLimiters.Load(key); ok {\n\t\trle := entry.(*rateLimiterEntry)\n\t\trle.lastUsed = now\n\t\treturn rle.limiter\n\t}\n\n\t// More aggressive rate limiting: 5 attempts per 15 minutes\n\tnewLimiter := rate.NewLimiter(rate.Every(15*time.Minute/5), 5)\n\tipUserLimiters.Store(key, &rateLimiterEntry{\n\t\tlimiter:  newLimiter,\n\t\tlastUsed: now,\n\t})\n\treturn newLimiter\n}\n\n// cleanupOldRateLimiters removes rate limiters that haven't been used recently\nfunc cleanupOldRateLimiters(olderThan time.Time) {\n\tipUserLimiters.Range(func(key, value any) bool {\n\t\tentry := value.(*rateLimiterEntry)\n\t\tif entry.lastUsed.Before(olderThan) {\n\t\t\tipUserLimiters.Delete(key)\n\t\t\tcclog.Debugf(\"Cleaned up rate limiter for %v\", key)\n\t\t}\n\t\treturn true\n\t})\n}\n\n// startRateLimiterCleanup starts a background goroutine to clean up old rate limiters\nfunc startRateLimiterCleanup() {\n\tgo func() {\n\t\tticker := time.NewTicker(1 * time.Hour)\n\t\tdefer ticker.Stop()\n\t\tfor range ticker.C {\n\t\t\t// Clean up limiters not used in the last 24 hours\n\t\t\tcleanupOldRateLimiters(time.Now().Add(-24 * time.Hour))\n\t\t}\n\t}()\n}\n\n// AuthConfig contains configuration for all authentication methods\ntype AuthConfig struct {\n\tLdapConfig   *LdapConfig    `json:\"ldap\"`\n\tJwtConfig    *JWTAuthConfig `json:\"jwts\"`\n\tOpenIDConfig *OpenIDConfig  `json:\"oidc\"`\n}\n\n// Keys holds the global authentication configuration\nvar Keys AuthConfig\n\n// Authentication manages all authentication methods and session handling\ntype Authentication struct {\n\tsessionStore   *sessions.CookieStore","numLines":120,"startLine":1,"totalLines":650}},"sourceToolAssistantUUID":"7ef3bbfe-76a4-4e38-9eee-f173b1b7d40c","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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+{"parentUuid":"c5df8a27-ab5c-4379-a7d5-55843e8fc221","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_01XKQ9H1ocNKLWCTbXwQrRVW","type":"message","role":"assistant","content":[{"type":"text","text":"I'll proceed directly with the edits. Starting with **F1** (auth.go):"}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":13255,"cache_read_input_tokens":181188,"output_tokens":354,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":13255,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":2,"output_tokens":354,"cache_read_input_tokens":181188,"cache_creation_input_tokens":13255,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":13255},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011CbjjYu8TuQL5ytkksqqAE","type":"assistant","uuid":"2fe98ba2-9273-422b-b7d9-b1d1642fc235","timestamp":"2026-06-05T07:40:37.812Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"2fe98ba2-9273-422b-b7d9-b1d1642fc235","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_01XKQ9H1ocNKLWCTbXwQrRVW","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01B17ArHh2DQAM3P2qfJ4P93","name":"Edit","input":{"replace_all":false,"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/auth/auth.go","old_string":"import (\n\t\"bytes\"\n\t\"context\"\n\t\"database/sql\"\n\t\"encoding/base64\"\n\t\"encoding/json\"\n\t\"errors\"\n\t\"fmt\"\n\t\"net\"","new_string":"import (\n\t\"bytes\"\n\t\"context\"\n\t\"crypto/rand\"\n\t\"database/sql\"\n\t\"encoding/base64\"\n\t\"encoding/json\"\n\t\"errors\"\n\t\"fmt\"\n\t\"net\""},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":13255,"cache_read_input_tokens":181188,"output_tokens":354,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":13255,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":2,"output_tokens":354,"cache_read_input_tokens":181188,"cache_creation_input_tokens":13255,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":13255},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011CbjjYu8TuQL5ytkksqqAE","type":"assistant","uuid":"ec85efa2-5ffc-4ecc-94ba-cbf1c79cb054","timestamp":"2026-06-05T07:40:39.072Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"ec85efa2-5ffc-4ecc-94ba-cbf1c79cb054","isSidechain":false,"promptId":"e03eec5c-111d-4cd6-a2ad-e4499d1dc6b1","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01B17ArHh2DQAM3P2qfJ4P93","type":"tool_result","content":"The file /Users/jan/prg/ClusterCockpit/cc-backend/internal/auth/auth.go has been updated successfully. (file state is current in your context — no need to Read it back)"}]},"uuid":"fa02769d-5ee9-436a-8fa1-165ae7390fb4","timestamp":"2026-06-05T07:54:56.269Z","toolUseResult":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/auth/auth.go","oldString":"import (\n\t\"bytes\"\n\t\"context\"\n\t\"database/sql\"\n\t\"encoding/base64\"\n\t\"encoding/json\"\n\t\"errors\"\n\t\"fmt\"\n\t\"net\"","newString":"import (\n\t\"bytes\"\n\t\"context\"\n\t\"crypto/rand\"\n\t\"database/sql\"\n\t\"encoding/base64\"\n\t\"encoding/json\"\n\t\"errors\"\n\t\"fmt\"\n\t\"net\"","originalFile":null,"structuredPatch":[{"oldStart":9,"oldLines":6,"newStart":9,"newLines":7,"lines":[" import (","   \"bytes\"","   \"context\"","+  \"crypto/rand\"","   \"database/sql\"","   \"encoding/base64\"","   \"encoding/json\""]}],"userModified":false,"replaceAll":false},"sourceToolAssistantUUID":"ec85efa2-5ffc-4ecc-94ba-cbf1c79cb054","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"fa02769d-5ee9-436a-8fa1-165ae7390fb4","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_01HDK1ecWYTu8kxMhsBcFCAr","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01HBcVc1jsx9Ysj8GVYyntRC","name":"Edit","input":{"replace_all":false,"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/auth/auth.go","old_string":"\t\tsessKey := os.Getenv(\"SESSION_KEY\")\n\t\tif sessKey == \"\" {\n\t\t\tcclog.Fatal(\"environment variable 'SESSION_KEY' not set: refusing to start with an ephemeral session key. \" +\n\t\t\t\t\"Set SESSION_KEY in .env (base64-encoded 32 random bytes); a random key would invalidate all sessions on every restart \" +\n\t\t\t\t\"and prevent sessions from validating across replicas.\")\n\t\t}\n\t\tkeyBytes, err := base64.StdEncoding.DecodeString(sessKey)\n\t\tif err != nil {\n\t\t\tcclog.Fatal(\"Error while initializing authentication -> decoding session key failed\")\n\t\t}\n\t\tauthInstance.sessionStore = sessions.NewCookieStore(keyBytes)\n\n\t\tif d, err := time.ParseDuration(config.Keys.SessionMaxAge); err == nil {\n\t\t\tauthInstance.SessionMaxAge = d\n\t\t}\n\n\t\tif authCfg == nil {\n\t\t\treturn\n\t\t}","new_string":"\t\tsessKey := os.Getenv(\"SESSION_KEY\")\n\t\tif sessKey == \"\" {\n\t\t\tif !config.Keys.DisableAuthentication {\n\t\t\t\tcclog.Fatal(\"environment variable 'SESSION_KEY' not set: refusing to start with an ephemeral session key. \" +\n\t\t\t\t\t\"Set SESSION_KEY in .env (base64-encoded 32 random bytes); a random key would invalidate all sessions on every restart \" +\n\t\t\t\t\t\"and prevent sessions from validating across replicas.\")\n\t\t\t}\n\t\t\t// Authentication is disabled: no user sessions are issued, so an\n\t\t\t// ephemeral random key is sufficient and SESSION_KEY is not required.\n\t\t\tephemeralKey := make([]byte, 32)\n\t\t\tif _, err := rand.Read(ephemeralKey); err != nil {\n\t\t\t\tcclog.Fatalf(\"Error while initializing authentication -> generating ephemeral session key failed: %v\", err)\n\t\t\t}\n\t\t\tauthInstance.sessionStore = sessions.NewCookieStore(ephemeralKey)\n\t\t} else {\n\t\t\tkeyBytes, err := base64.StdEncoding.DecodeString(sessKey)\n\t\t\tif err != nil {\n\t\t\t\tcclog.Fatal(\"Error while initializing authentication -> decoding session key failed\")\n\t\t\t}\n\t\t\tauthInstance.sessionStore = sessions.NewCookieStore(keyBytes)\n\t\t}\n\n\t\tif d, err := time.ParseDuration(config.Keys.SessionMaxAge); err == nil {\n\t\t\tauthInstance.SessionMaxAge = d\n\t\t}\n\n\t\t// When authentication is disabled no authenticators are required; the\n\t\t// session store created above is enough for the server to run with a\n\t\t// valid (non-nil) auth instance.\n\t\tif config.Keys.DisableAuthentication {\n\t\t\treturn\n\t\t}\n\n\t\tif authCfg == nil {\n\t\t\treturn\n\t\t}"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":445,"cache_read_input_tokens":194443,"output_tokens":1079,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":445,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":2,"output_tokens":1079,"cache_read_input_tokens":194443,"cache_creation_input_tokens":445,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":445},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011Cbjkegy1ZBiK46axHnyRJ","type":"assistant","uuid":"d31c1c55-8a56-4a62-98e2-d920aec1ea4a","timestamp":"2026-06-05T07:55:09.617Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"d31c1c55-8a56-4a62-98e2-d920aec1ea4a","isSidechain":false,"promptId":"e03eec5c-111d-4cd6-a2ad-e4499d1dc6b1","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01HBcVc1jsx9Ysj8GVYyntRC","type":"tool_result","content":"The file /Users/jan/prg/ClusterCockpit/cc-backend/internal/auth/auth.go has been updated successfully. (file state is current in your context — no need to Read it back)"}]},"uuid":"8359a52f-8f13-4ad6-9163-da7d42373378","timestamp":"2026-06-05T07:56:35.474Z","toolUseResult":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/auth/auth.go","oldString":"\t\tsessKey := os.Getenv(\"SESSION_KEY\")\n\t\tif sessKey == \"\" {\n\t\t\tcclog.Fatal(\"environment variable 'SESSION_KEY' not set: refusing to start with an ephemeral session key. \" +\n\t\t\t\t\"Set SESSION_KEY in .env (base64-encoded 32 random bytes); a random key would invalidate all sessions on every restart \" +\n\t\t\t\t\"and prevent sessions from validating across replicas.\")\n\t\t}\n\t\tkeyBytes, err := base64.StdEncoding.DecodeString(sessKey)\n\t\tif err != nil {\n\t\t\tcclog.Fatal(\"Error while initializing authentication -> decoding session key failed\")\n\t\t}\n\t\tauthInstance.sessionStore = sessions.NewCookieStore(keyBytes)\n\n\t\tif d, err := time.ParseDuration(config.Keys.SessionMaxAge); err == nil {\n\t\t\tauthInstance.SessionMaxAge = d\n\t\t}\n\n\t\tif authCfg == nil {\n\t\t\treturn\n\t\t}","newString":"\t\tsessKey := os.Getenv(\"SESSION_KEY\")\n\t\tif sessKey == \"\" {\n\t\t\tif !config.Keys.DisableAuthentication {\n\t\t\t\tcclog.Fatal(\"environment variable 'SESSION_KEY' not set: refusing to start with an ephemeral session key. \" +\n\t\t\t\t\t\"Set SESSION_KEY in .env (base64-encoded 32 random bytes); a random key would invalidate all sessions on every restart \" +\n\t\t\t\t\t\"and prevent sessions from validating across replicas.\")\n\t\t\t}\n\t\t\t// Authentication is disabled: no user sessions are issued, so an\n\t\t\t// ephemeral random key is sufficient and SESSION_KEY is not required.\n\t\t\tephemeralKey := make([]byte, 32)\n\t\t\tif _, err := rand.Read(ephemeralKey); err != nil {\n\t\t\t\tcclog.Fatalf(\"Error while initializing authentication -> generating ephemeral session key failed: %v\", err)\n\t\t\t}\n\t\t\tauthInstance.sessionStore = sessions.NewCookieStore(ephemeralKey)\n\t\t} else {\n\t\t\tkeyBytes, err := base64.StdEncoding.DecodeString(sessKey)\n\t\t\tif err != nil {\n\t\t\t\tcclog.Fatal(\"Error while initializing authentication -> decoding session key failed\")\n\t\t\t}\n\t\t\tauthInstance.sessionStore = sessions.NewCookieStore(keyBytes)\n\t\t}\n\n\t\tif d, err := time.ParseDuration(config.Keys.SessionMaxAge); err == nil {\n\t\t\tauthInstance.SessionMaxAge = d\n\t\t}\n\n\t\t// When authentication is disabled no authenticators are required; the\n\t\t// session store created above is enough for the server to run with a\n\t\t// valid (non-nil) auth instance.\n\t\tif config.Keys.DisableAuthentication {\n\t\t\treturn\n\t\t}\n\n\t\tif authCfg == nil {\n\t\t\treturn\n\t\t}","originalFile":null,"structuredPatch":[{"oldStart":188,"oldLines":20,"newStart":188,"newLines":37,"lines":[" ","     sessKey := os.Getenv(\"SESSION_KEY\")","     if sessKey == \"\" {","-      cclog.Fatal(\"environment variable 'SESSION_KEY' not set: refusing to start with an ephemeral session key. \" +","-        \"Set SESSION_KEY in .env (base64-encoded 32 random bytes); a random key would invalidate all sessions on every restart \" +","-        \"and prevent sessions from validating across replicas.\")","+      if !config.Keys.DisableAuthentication {","+        cclog.Fatal(\"environment variable 'SESSION_KEY' not set: refusing to start with an ephemeral session key. \" +","+          \"Set SESSION_KEY in .env (base64-encoded 32 random bytes); a random key would invalidate all sessions on every restart \" +","+          \"and prevent sessions from validating across replicas.\")","+      }","+      // Authentication is disabled: no user sessions are issued, so an","+      // ephemeral random key is sufficient and SESSION_KEY is not required.","+      ephemeralKey := make([]byte, 32)","+      if _, err := rand.Read(ephemeralKey); err != nil {","+        cclog.Fatalf(\"Error while initializing authentication -> generating ephemeral session key failed: %v\", err)","+      }","+      authInstance.sessionStore = sessions.NewCookieStore(ephemeralKey)","+    } else {","+      keyBytes, err := base64.StdEncoding.DecodeString(sessKey)","+      if err != nil {","+        cclog.Fatal(\"Error while initializing authentication -> decoding session key failed\")","+      }","+      authInstance.sessionStore = sessions.NewCookieStore(keyBytes)","     }","-    keyBytes, err := base64.StdEncoding.DecodeString(sessKey)","-    if err != nil {","-      cclog.Fatal(\"Error while initializing authentication -> decoding session key failed\")","-    }","-    authInstance.sessionStore = sessions.NewCookieStore(keyBytes)"," ","     if d, err := time.ParseDuration(config.Keys.SessionMaxAge); err == nil {","       authInstance.SessionMaxAge = d","     }"," ","+    // When authentication is disabled no authenticators are required; the","+    // session store created above is enough for the server to run with a","+    // valid (non-nil) auth instance.","+    if config.Keys.DisableAuthentication {","+      return","+    }","+","     if authCfg == nil {","       return","     }"]}],"userModified":false,"replaceAll":false},"sourceToolAssistantUUID":"d31c1c55-8a56-4a62-98e2-d920aec1ea4a","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"8359a52f-8f13-4ad6-9163-da7d42373378","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_01NtbDMhn1RZQVNgVzDNXtpu","type":"message","role":"assistant","content":[{"type":"text","text":"Now **F1 part B** — always initialize auth in `main.go`:"}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":1146,"cache_read_input_tokens":194888,"output_tokens":591,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":1146,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":2,"output_tokens":591,"cache_read_input_tokens":194888,"cache_creation_input_tokens":1146,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":1146},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011CbjkmzSvKRrZMveaqr3N1","type":"assistant","uuid":"2766c679-64b4-4ccb-b2f6-d6aa66c032dd","timestamp":"2026-06-05T07:56:40.995Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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+{"parentUuid":"ecdf1325-3d7e-40c8-8a9f-f0ed93cc216d","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_01HepGJsJbUn72K5WbmZuNse","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01BZBpYrH3P5Qa7ZoHqT2cx8","name":"Edit","input":{"replace_all":false,"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go","old_string":"\t// Wait for either:\n\t// 1. An error from server startup\n\t// 2. Completion of all goroutines (normal shutdown or crash)\n\tselect {\n\tcase err := <-errChan:\n\t\t// errChan will be closed when waitDone is closed, which happens\n\t\t// when all goroutines complete (either from normal shutdown or error)\n\t\tif err != nil {\n\t\t\treturn err\n\t\t}\n\tcase <-time.After(100 * time.Millisecond):\n\t\t// Give the server 100ms to start and report any immediate startup errors\n\t\t// After that, just wait for normal shutdown completion\n\t\tselect {\n\t\tcase err := <-errChan:\n\t\t\tif err != nil {\n\t\t\t\treturn err\n\t\t\t}\n\t\tcase <-waitDone:\n\t\t\t// Normal shutdown completed\n\t\t}\n\t}\n\n\tcclog.Print(\"Graceful shutdown completed!\")\n\treturn nil\n}","new_string":"\t// Wait for either:\n\t// 1. An error from server startup\n\t// 2. Completion of all goroutines (normal shutdown or crash)\n\tvar runErr error\n\tselect {\n\tcase runErr = <-errChan:\n\t\t// errChan will be closed when waitDone is closed, which happens\n\t\t// when all goroutines complete (either from normal shutdown or error)\n\tcase <-time.After(100 * time.Millisecond):\n\t\t// Give the server 100ms to start and report any immediate startup errors\n\t\t// After that, just wait for normal shutdown completion\n\t\tselect {\n\t\tcase runErr = <-errChan:\n\t\tcase <-waitDone:\n\t\t\t// Normal shutdown completed\n\t\t}\n\t}\n\n\tif runErr != nil {\n\t\t// A subsystem failed (e.g. the HTTP server could not bind). Trigger the\n\t\t// graceful-shutdown path for the subsystems that were already started\n\t\t// (metricstore checkpoint, archiver flush, taskmanager) by cancelling the\n\t\t// context the signal handler waits on, then wait for it to finish so we\n\t\t// don't exit before the final checkpoint is written.\n\t\tcancel()\n\t\t<-waitDone\n\t\treturn runErr\n\t}\n\n\tcclog.Print(\"Graceful shutdown completed!\")\n\treturn nil\n}"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":131,"cache_creation_input_tokens":473,"cache_read_input_tokens":197812,"output_tokens":830,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":473,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":131,"output_tokens":830,"cache_read_input_tokens":197812,"cache_creation_input_tokens":473,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":473},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011CbjmSNeiRj2ykwFrsPKFV","type":"assistant","uuid":"61aea0e1-07ae-4c1a-804c-f35336660aa4","timestamp":"2026-06-05T08:05:25.028Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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+{"parentUuid":"0211ac20-fd6e-4869-941c-2be2e1d81af0","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_01BKuH322Hc4S2uCaE9UUqMa","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01QGD8Ux5yAPzCYnK2MDHKoq","name":"Edit","input":{"replace_all":false,"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/api/nats.go","old_string":"\tapi := &NatsAPI{\n\t\tJobRepository: repository.GetJobRepository(),\n\t\tjobCh:         make(chan natsMessage, jobConc),\n\t\tnodeCh:        make(chan natsMessage, nodeConc),\n\t}\n\n\t// Start worker goroutines\n\tfor range jobConc {\n\t\tgo api.jobWorker()\n\t}\n\tfor range nodeConc {\n\t\tgo api.nodeWorker()\n\t}\n\n\treturn api\n}\n\n// jobWorker processes job event messages from the job channel.\nfunc (api *NatsAPI) jobWorker() {\n\tfor msg := range api.jobCh {\n\t\tapi.handleJobEvent(msg.subject, msg.data)\n\t}\n}\n\n// nodeWorker processes node state messages from the node channel.\nfunc (api *NatsAPI) nodeWorker() {\n\tfor msg := range api.nodeCh {\n\t\tapi.handleNodeState(msg.subject, msg.data)\n\t}\n}","new_string":"\tapi := &NatsAPI{\n\t\tJobRepository: repository.GetJobRepository(),\n\t\tjobCh:         make(chan natsMessage, jobConc),\n\t\tnodeCh:        make(chan natsMessage, nodeConc),\n\t\tstop:          make(chan struct{}),\n\t}\n\n\t// Start worker goroutines\n\tfor range jobConc {\n\t\tgo api.jobWorker()\n\t}\n\tfor range nodeConc {\n\t\tgo api.nodeWorker()\n\t}\n\n\treturn api\n}\n\n// Shutdown stops the worker goroutines and tells subscription callbacks to stop\n// enqueueing. It is safe to call multiple times. Callers must ensure the NATS\n// client is closed first so no new callbacks are invoked.\nfunc (api *NatsAPI) Shutdown() {\n\tapi.stopOnce.Do(func() {\n\t\tclose(api.stop)\n\t})\n}\n\n// jobWorker processes job event messages from the job channel.\nfunc (api *NatsAPI) jobWorker() {\n\tfor {\n\t\tselect {\n\t\tcase <-api.stop:\n\t\t\treturn\n\t\tcase msg := <-api.jobCh:\n\t\t\tapi.handleJobEvent(msg.subject, msg.data)\n\t\t}\n\t}\n}\n\n// nodeWorker processes node state messages from the node channel.\nfunc (api *NatsAPI) nodeWorker() {\n\tfor {\n\t\tselect {\n\t\tcase <-api.stop:\n\t\t\treturn\n\t\tcase msg := <-api.nodeCh:\n\t\t\tapi.handleNodeState(msg.subject, msg.data)\n\t\t}\n\t}\n}"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":114,"cache_creation_input_tokens":533,"cache_read_input_tokens":200334,"output_tokens":998,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":533,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":114,"output_tokens":998,"cache_read_input_tokens":200334,"cache_creation_input_tokens":533,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":533},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011Cbjmdikzw94C7418Mm3Sb","type":"assistant","uuid":"93fbbe7e-1ec2-49db-8050-f7c523c0f897","timestamp":"2026-06-05T08:08:00.421Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"93fbbe7e-1ec2-49db-8050-f7c523c0f897","isSidechain":false,"promptId":"e03eec5c-111d-4cd6-a2ad-e4499d1dc6b1","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01QGD8Ux5yAPzCYnK2MDHKoq","type":"tool_result","content":"The file /Users/jan/prg/ClusterCockpit/cc-backend/internal/api/nats.go has been updated successfully. (file state is current in your context — no need to Read it back)"}]},"uuid":"f3ef4b38-e675-4060-abff-9afed1b13ea7","timestamp":"2026-06-05T08:08:07.663Z","toolUseResult":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/api/nats.go","oldString":"\tapi := &NatsAPI{\n\t\tJobRepository: repository.GetJobRepository(),\n\t\tjobCh:         make(chan natsMessage, jobConc),\n\t\tnodeCh:        make(chan natsMessage, nodeConc),\n\t}\n\n\t// Start worker goroutines\n\tfor range jobConc {\n\t\tgo api.jobWorker()\n\t}\n\tfor range nodeConc {\n\t\tgo api.nodeWorker()\n\t}\n\n\treturn api\n}\n\n// jobWorker processes job event messages from the job channel.\nfunc (api *NatsAPI) jobWorker() {\n\tfor msg := range api.jobCh {\n\t\tapi.handleJobEvent(msg.subject, msg.data)\n\t}\n}\n\n// nodeWorker processes node state messages from the node channel.\nfunc (api *NatsAPI) nodeWorker() {\n\tfor msg := range api.nodeCh {\n\t\tapi.handleNodeState(msg.subject, msg.data)\n\t}\n}","newString":"\tapi := &NatsAPI{\n\t\tJobRepository: repository.GetJobRepository(),\n\t\tjobCh:         make(chan natsMessage, jobConc),\n\t\tnodeCh:        make(chan natsMessage, nodeConc),\n\t\tstop:          make(chan struct{}),\n\t}\n\n\t// Start worker goroutines\n\tfor range jobConc {\n\t\tgo api.jobWorker()\n\t}\n\tfor range nodeConc {\n\t\tgo api.nodeWorker()\n\t}\n\n\treturn api\n}\n\n// Shutdown stops the worker goroutines and tells subscription callbacks to stop\n// enqueueing. It is safe to call multiple times. Callers must ensure the NATS\n// client is closed first so no new callbacks are invoked.\nfunc (api *NatsAPI) Shutdown() {\n\tapi.stopOnce.Do(func() {\n\t\tclose(api.stop)\n\t})\n}\n\n// jobWorker processes job event messages from the job channel.\nfunc (api *NatsAPI) jobWorker() {\n\tfor {\n\t\tselect {\n\t\tcase <-api.stop:\n\t\t\treturn\n\t\tcase msg := <-api.jobCh:\n\t\t\tapi.handleJobEvent(msg.subject, msg.data)\n\t\t}\n\t}\n}\n\n// nodeWorker processes node state messages from the node channel.\nfunc (api *NatsAPI) nodeWorker() {\n\tfor {\n\t\tselect {\n\t\tcase <-api.stop:\n\t\t\treturn\n\t\tcase msg := <-api.nodeCh:\n\t\t\tapi.handleNodeState(msg.subject, msg.data)\n\t\t}\n\t}\n}","originalFile":null,"structuredPatch":[{"oldStart":105,"oldLines":6,"newStart":105,"newLines":7,"lines":["     JobRepository: repository.GetJobRepository(),","     jobCh:         make(chan natsMessage, jobConc),","     nodeCh:        make(chan natsMessage, nodeConc),","+    stop:          make(chan struct{}),","   }"," ","   // Start worker goroutines"]},{"oldStart":118,"oldLines":17,"newStart":119,"newLines":36,"lines":["   return api"," }"," ","+// Shutdown stops the worker goroutines and tells subscription callbacks to stop","+// enqueueing. It is safe to call multiple times. Callers must ensure the NATS","+// client is closed first so no new callbacks are invoked.","+func (api *NatsAPI) Shutdown() {","+  api.stopOnce.Do(func() {","+    close(api.stop)","+  })","+}","+"," // jobWorker processes job event messages from the job channel."," func (api *NatsAPI) jobWorker() {","-  for msg := range api.jobCh {","-    api.handleJobEvent(msg.subject, msg.data)","+  for {","+    select {","+    case <-api.stop:","+      return","+    case msg := <-api.jobCh:","+      api.handleJobEvent(msg.subject, msg.data)","+    }","   }"," }"," "," // nodeWorker processes node state messages from the node channel."," func (api *NatsAPI) nodeWorker() {","-  for msg := range api.nodeCh {","-    api.handleNodeState(msg.subject, msg.data)","+  for {","+    select {","+    case <-api.stop:","+      return","+    case msg := <-api.nodeCh:","+      api.handleNodeState(msg.subject, msg.data)","+    }","   }"," }"," "]}],"userModified":false,"replaceAll":false},"sourceToolAssistantUUID":"93fbbe7e-1ec2-49db-8050-f7c523c0f897","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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+{"parentUuid":"297d4b28-d14e-45ee-8ee8-7822dad52f3b","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_01GLgQRvCGGPBVkPckKZ4jcX","type":"message","role":"assistant","content":[{"type":"thinking","thinking":"","signature":"EsMCCmMIDhgCKkCgNYPy1AAjgBLfLFDp5iP64QVAuhprKV2LYUcsOF17+3fMNarIvUvOLh5a/XvRLvYQwpL38CdTa2MaA3E7adctMg9jbGF1ZGUtb3B1cy00LTg4AEIIdGhpbmtpbmcSDMHmoVe+OGSYqqDhJhoM7ybC4xTqKSla/0twIjBVXuypmwIGz1+oIgQZFPlQt7Bf0odtQpW5rdkrMq1vckNd3sTu20QqzHD0c0BjPw8qjQG4ent4TwCjMTrTkrOUQAL6Bisknthx4nz7vzKYdpPuLPRIVFQAlKy+SL9DHSx2jO18yjYwbIkLyZzDL1qeVf/oY2oppg1U+97YuQ7pFLaI9pwH1F1BGDimEGKzKMkPVTGqDNIMlOqfcCOlfxt8aJGjB3U0RT04BYxNhPTxAeX2U8r3M+m++6IBfbjQd/QYAQ=="}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":102,"cache_creation_input_tokens":1176,"cache_read_input_tokens":200867,"output_tokens":566,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":1176,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":102,"output_tokens":566,"cache_read_input_tokens":200867,"cache_creation_input_tokens":1176,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":1176},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011Cbjmf1Wb3gyzoLEjt1HvF","type":"assistant","uuid":"0ac882e9-29a9-47ca-8048-ba8da84be502","timestamp":"2026-06-05T08:08:13.438Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"0ac882e9-29a9-47ca-8048-ba8da84be502","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_01GLgQRvCGGPBVkPckKZ4jcX","type":"message","role":"assistant","content":[{"type":"text","text":"Now update the subscription callbacks to respect `stop`:"}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":102,"cache_creation_input_tokens":1176,"cache_read_input_tokens":200867,"output_tokens":566,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":1176,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":102,"output_tokens":566,"cache_read_input_tokens":200867,"cache_creation_input_tokens":1176,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":1176},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011Cbjmf1Wb3gyzoLEjt1HvF","type":"assistant","uuid":"3f71fbd4-880a-4ddf-ba44-968ab49dfa6b","timestamp":"2026-06-05T08:08:13.871Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"3f71fbd4-880a-4ddf-ba44-968ab49dfa6b","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_01GLgQRvCGGPBVkPckKZ4jcX","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01Mg9d7J1SgiMcvTpPtQszgQ","name":"Edit","input":{"replace_all":false,"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/api/nats.go","old_string":"\t\tif err := client.Subscribe(s.SubjectJobEvent, func(subject string, data []byte) {\n\t\t\tapi.jobCh <- natsMessage{subject: subject, data: data}\n\t\t}); err != nil {\n\t\t\treturn err\n\t\t}\n\n\t\tif err := client.Subscribe(s.SubjectNodeState, func(subject string, data []byte) {\n\t\t\tapi.nodeCh <- natsMessage{subject: subject, data: data}\n\t\t}); err != nil {\n\t\t\treturn err\n\t\t}","new_string":"\t\tif err := client.Subscribe(s.SubjectJobEvent, func(subject string, data []byte) {\n\t\t\tselect {\n\t\t\tcase api.jobCh <- natsMessage{subject: subject, data: data}:\n\t\t\tcase <-api.stop:\n\t\t\t}\n\t\t}); err != nil {\n\t\t\treturn err\n\t\t}\n\n\t\tif err := client.Subscribe(s.SubjectNodeState, func(subject string, data []byte) {\n\t\t\tselect {\n\t\t\tcase api.nodeCh <- natsMessage{subject: subject, data: data}:\n\t\t\tcase <-api.stop:\n\t\t\t}\n\t\t}); err != nil {\n\t\t\treturn err\n\t\t}"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":102,"cache_creation_input_tokens":1176,"cache_read_input_tokens":200867,"output_tokens":566,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":1176,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":102,"output_tokens":566,"cache_read_input_tokens":200867,"cache_creation_input_tokens":1176,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":1176},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011Cbjmf1Wb3gyzoLEjt1HvF","type":"assistant","uuid":"80982796-2486-4148-b4f3-c5defcb1d3a2","timestamp":"2026-06-05T08:08:17.504Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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(file state is current in your context — no need to Read it back)"}]},"uuid":"8593bdb7-fe58-4fcc-bdc5-d6c0a810c39e","timestamp":"2026-06-05T08:10:25.240Z","toolUseResult":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go","oldString":"func Shutdown(timeout time.Duration) error {\n\tcclog.Info(\"Initiating archiver shutdown...\")\n\n\t// Close channel to signal no more jobs will be accepted\n\tclose(archiveChannel)","newString":"func Shutdown(timeout time.Duration) error {\n\tcclog.Info(\"Initiating archiver shutdown...\")\n\n\t// Guard against Shutdown being called when Start was never run: closing a nil\n\t// channel and receiving from a nil workerDone would panic/block forever.\n\tif archiveChannel == nil {\n\t\tcclog.Warn(\"Archiver shutdown called but archiver was never started\")\n\t\treturn nil\n\t}\n\n\t// Close channel to signal no more jobs will be accepted\n\tclose(archiveChannel)","originalFile":"// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n// All rights reserved. This file is part of cc-backend.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\n// Package archiver provides asynchronous job archiving functionality for ClusterCockpit.\n//\n// The archiver runs a background worker goroutine that processes job archiving requests\n// from a buffered channel. When jobs complete, their metric data is archived from the\n// metric store to the configured archive backend (filesystem, S3, etc.).\n//\n// # Architecture\n//\n// The archiver uses a producer-consumer pattern:\n//   - Producer: TriggerArchiving() sends jobs to archiveChannel\n//   - Consumer: archivingWorker() processes jobs from the channel\n//   - Coordination: sync.WaitGroup tracks pending archive operations\n//\n// # Lifecycle\n//\n//  1. Start(repo, ctx) - Initialize worker with context for cancellation\n//  2. TriggerArchiving(job) - Queue job for archiving (called when job stops)\n//  3. archivingWorker() - Background goroutine processes jobs\n//  4. Shutdown(timeout) - Graceful shutdown with timeout\n//\n// # Graceful Shutdown\n//\n// The archiver supports graceful shutdown with configurable timeout:\n//   - Closes channel to reject new jobs\n//   - Waits for pending jobs to complete (up to timeout)\n//   - Cancels context if timeout exceeded\n//   - Ensures worker goroutine exits cleanly\n//\n// # Example Usage\n//\n//\t// Initialize archiver\n//\tctx, cancel := context.WithCancel(context.Background())\n//\tdefer cancel()\n//\tarchiver.Start(jobRepository, ctx)\n//\n//\t// Trigger archiving when job completes\n//\tarchiver.TriggerArchiving(job)\n//\n//\t// Graceful shutdown with 10 second timeout\n//\tif err := archiver.Shutdown(10 * time.Second); err != nil {\n//\t    log.Printf(\"Archiver shutdown timeout: %v\", err)\n//\t}\npackage archiver\n\nimport (\n\t\"context\"\n\t\"fmt\"\n\t\"sync\"\n\t\"time\"\n\n\t\"github.com/ClusterCockpit/cc-backend/internal/repository\"\n\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n\tsq \"github.com/Masterminds/squirrel\"\n)\n\nvar (\n\tarchivePending sync.WaitGroup\n\tarchiveChannel chan *schema.Job\n\tjobRepo        *repository.JobRepository\n\tshutdownCtx    context.Context\n\tshutdownCancel context.CancelFunc\n\tworkerDone     chan struct{}\n)\n\n// Start initializes the archiver and starts the background worker goroutine.\n//\n// The archiver processes job archiving requests asynchronously via a buffered channel.\n// Jobs are sent to the channel using TriggerArchiving() and processed by the worker.\n//\n// Parameters:\n//   - r: JobRepository instance for database operations\n//   - ctx: Context for cancellation (shutdown signal propagation)\n//\n// The worker goroutine will run until:\n//   - ctx is cancelled (via parent shutdown)\n//   - archiveChannel is closed (via Shutdown())\n//\n// Must be called before TriggerArchiving(). Safe to call only once.\nfunc Start(r *repository.JobRepository, ctx context.Context) {\n\tshutdownCtx, shutdownCancel = context.WithCancel(ctx)\n\tarchiveChannel = make(chan *schema.Job, 128)\n\tworkerDone = make(chan struct{})\n\tjobRepo = r\n\n\tgo archivingWorker()\n}\n\n// archivingWorker is the background goroutine that processes job archiving requests.\n//\n// The worker loop:\n//  1. Blocks waiting for jobs on archiveChannel or shutdown signal\n//  2. Fetches job metadata from repository\n//  3. Archives job data to configured backend (calls ArchiveJob)\n//  4. Updates job footprint and energy metrics in database\n//  5. Marks job as successfully archived\n//  6. Calls job stop hooks\n//\n// The worker exits when:\n//   - shutdownCtx is cancelled (timeout during shutdown)\n//   - archiveChannel is closed (normal shutdown)\n//\n// Errors during archiving are logged and the job is marked as failed,\n// but the worker continues processing other jobs.\nfunc archivingWorker() {\n\tdefer close(workerDone)\n\n\tfor {\n\t\tselect {\n\t\tcase <-shutdownCtx.Done():\n\t\t\tcclog.Info(\"Archive worker received shutdown signal\")\n\t\t\treturn\n\n\t\tcase job, ok := <-archiveChannel:\n\t\t\tif !ok {\n\t\t\t\tcclog.Info(\"Archive channel closed, worker exiting\")\n\t\t\t\treturn\n\t\t\t}\n\n\t\t\tstart := time.Now()\n\t\t\t// not using meta data, called to load JobMeta into Cache?\n\t\t\t// will fail if job meta not in repository\n\t\t\tif _, err := jobRepo.FetchMetadata(job); err != nil {\n\t\t\t\tcclog.Errorf(\"archiving job (dbid: %d) failed at check metadata step: %s\", *job.ID, err.Error())\n\t\t\t\tjobRepo.UpdateMonitoringStatus(*job.ID, schema.MonitoringStatusArchivingFailed)\n\t\t\t\tarchivePending.Done()\n\t\t\t\tcontinue\n\t\t\t}\n\n\t\t\t// ArchiveJob will fetch all the data from a MetricDataRepository and push into configured archive backend\n\t\t\t// Use shutdown context to allow cancellation\n\t\t\tjobMeta, err := ArchiveJob(job, shutdownCtx)\n\t\t\tif err != nil {\n\t\t\t\tcclog.Errorf(\"archiving job (dbid: %d) failed at archiving job step: %s\", *job.ID, err.Error())\n\t\t\t\tjobRepo.UpdateMonitoringStatus(*job.ID, schema.MonitoringStatusArchivingFailed)\n\t\t\t\tarchivePending.Done()\n\t\t\t\tcontinue\n\t\t\t}\n\n\t\t\tstmt := sq.Update(\"job\").Where(\"job.id = ?\", job.ID)\n\n\t\t\tif stmt, err = jobRepo.UpdateFootprint(stmt, jobMeta); err != nil {\n\t\t\t\tcclog.Errorf(\"archiving job (dbid: %d) failed at update Footprint step: %s\", *job.ID, err.Error())\n\t\t\t\tarchivePending.Done()\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\tif stmt, err = jobRepo.UpdateEnergy(stmt, jobMeta); err != nil {\n\t\t\t\tcclog.Errorf(\"archiving job (dbid: %d) failed at update Energy step: %s\", *job.ID, err.Error())\n\t\t\t\tarchivePending.Done()\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\t// Update the jobs database entry one last time:\n\t\t\tstmt = jobRepo.MarkArchived(stmt, schema.MonitoringStatusArchivingSuccessful)\n\t\t\tif err := jobRepo.Execute(stmt); err != nil {\n\t\t\t\tcclog.Errorf(\"archiving job (dbid: %d) failed at db execute: %s\", *job.ID, err.Error())\n\t\t\t\tarchivePending.Done()\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\tcclog.Debugf(\"archiving job %d took %s\", job.JobID, time.Since(start))\n\t\t\tcclog.Infof(\"archiving job (dbid: %d) successful\", *job.ID)\n\n\t\t\trepository.CallJobStopHooks(job)\n\t\t\tarchivePending.Done()\n\t\t}\n\t}\n}\n\n// TriggerArchiving queues a job for asynchronous archiving.\n//\n// This function should be called when a job completes (stops) to archive its\n// metric data from the metric store to the configured archive backend.\n//\n// The function:\n//  1. Increments the pending job counter (WaitGroup)\n//  2. Sends the job to the archiving channel (buffered, capacity 128)\n//  3. Returns immediately (non-blocking unless channel is full)\n//\n// The actual archiving is performed asynchronously by the worker goroutine.\n// Upon completion, the worker will decrement the pending counter.\n//\n// Panics if Start() has not been called first.\nfunc TriggerArchiving(job *schema.Job) {\n\tif archiveChannel == nil {\n\t\tcclog.Fatal(\"Cannot archive without archiving channel. Did you Start the archiver?\")\n\t}\n\n\tarchivePending.Add(1)\n\tarchiveChannel <- job\n}\n\n// Shutdown performs a graceful shutdown of the archiver with a configurable timeout.\n//\n// The shutdown process:\n//  1. Closes archiveChannel - no new jobs will be accepted\n//  2. Waits for pending jobs to complete (up to timeout duration)\n//  3. If timeout is exceeded:\n//     - Cancels shutdownCtx to interrupt ongoing ArchiveJob operations\n//     - Returns error indicating timeout\n//  4. Waits for worker goroutine to exit cleanly\n//\n// Parameters:\n//   - timeout: Maximum duration to wait for pending jobs to complete\n//     (recommended: 10-30 seconds for production)\n//\n// Returns:\n//   - nil if all jobs completed within timeout\n//   - error if timeout was exceeded (some jobs may not have been archived)\n//\n// Jobs that don't complete within the timeout will be marked as failed.\n// The function always ensures the worker goroutine exits before returning.\n//\n// Example:\n//\n//\tif err := archiver.Shutdown(10 * time.Second); err != nil {\n//\t    log.Printf(\"Some jobs did not complete: %v\", err)\n//\t}\nfunc Shutdown(timeout time.Duration) error {\n\tcclog.Info(\"Initiating archiver shutdown...\")\n\n\t// Close channel to signal no more jobs will be accepted\n\tclose(archiveChannel)\n\n\t// Create a channel to signal when all jobs are done\n\tdone := make(chan struct{})\n\tgo func() {\n\t\tarchivePending.Wait()\n\t\tclose(done)\n\t}()\n\n\t// Wait for jobs to complete or timeout\n\tselect {\n\tcase <-done:\n\t\tcclog.Info(\"All archive jobs completed successfully\")\n\t\t// Wait for worker to exit\n\t\t<-workerDone\n\t\treturn nil\n\tcase <-time.After(timeout):\n\t\tcclog.Warn(\"Archiver shutdown timeout exceeded, cancelling remaining operations\")\n\t\t// Cancel any ongoing operations\n\t\tshutdownCancel()\n\t\t// Wait for worker to exit\n\t\t<-workerDone\n\t\treturn fmt.Errorf(\"archiver shutdown timeout after %v\", timeout)\n\t}\n}\n","structuredPatch":[{"oldStart":222,"oldLines":6,"newStart":222,"newLines":13,"lines":[" func Shutdown(timeout time.Duration) error {","   cclog.Info(\"Initiating archiver shutdown...\")"," ","+  // Guard against Shutdown being called when Start was never run: closing a nil","+  // channel and receiving from a nil workerDone would panic/block forever.","+  if archiveChannel == nil {","+    cclog.Warn(\"Archiver shutdown called but archiver was never started\")","+    return nil","+  }","+","   // Close channel to signal no more jobs will be accepted","   close(archiveChannel)"," "]}],"userModified":false,"replaceAll":false},"sourceToolAssistantUUID":"155990fe-221b-423a-88d6-d3506400b4f6","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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+{"parentUuid":"0e3920a1-5004-4f97-ae99-f2c3be4c0fb1","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_011Un8JJAkrZGwEKatEYC1ud","type":"message","role":"assistant","content":[{"type":"text","text":"Now let me build and vet everything:"}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":679,"cache_read_input_tokens":203273,"output_tokens":192,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":679,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":2,"output_tokens":192,"cache_read_input_tokens":203273,"cache_creation_input_tokens":679,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":679},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011Cbjmr6yJvQauvu35QBVXq","type":"assistant","uuid":"ec682b92-87f9-429d-a307-102d482cdcea","timestamp":"2026-06-05T08:10:43.059Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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+{"parentUuid":"1efe182d-c68b-4690-abb9-e8ebee795e46","isSidechain":false,"promptId":"e03eec5c-111d-4cd6-a2ad-e4499d1dc6b1","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01D2Y6vKHSad6C98gCxah9tg","type":"tool_result","content":"186\t\t}\n187\t\n188\t\tif !config.Keys.DisableAuthentication {\n189\t\t\t// Check for default security keys\n190\t\t\tcheckDefaultSecurityKeys()\n191\t\n192\t\t\tif flagNewUser != \"\" {\n193\t\t\t\tif err := addUser(flagNewUser); err != nil {\n194\t\t\t\t\treturn err\n195\t\t\t\t}\n196\t\t\t}\n197\t\n198\t\t\tif flagDelUser != \"\" {\n199\t\t\t\tif err := delUser(flagDelUser); err != nil {\n200\t\t\t\t\treturn err\n201\t\t\t\t}\n202\t\t\t}\n203\t\n204\t\t\tauthHandle := auth.GetAuthInstance()\n205\t\n206\t\t\tif flagSyncLDAP {\n207\t\t\t\tif err := syncLDAP(authHandle); err != nil {\n208\t\t\t\t\treturn err\n209\t\t\t\t}\n210\t\t\t}\n211\t\n212\t\t\tif flagGenJWT != \"\" {\n213\t\t\t\tif err := generateJWT(authHandle, flagGenJWT); err != nil {\n214\t\t\t\t\treturn err\n215\t\t\t\t}\n216\t\t\t}\n217\t\t}\n218\t\n219\t\treturn nil\n220\t}\n221\t\n222\t// checkDefaultSecurityKeys warns if default JWT keys are detected\n223\tfunc checkDefaultSecurityKeys() {"}]},"uuid":"a981558e-ec62-41cf-a624-adb752b499f3","timestamp":"2026-06-05T08:11:07.010Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go","content":"\t}\n\n\tif !config.Keys.DisableAuthentication {\n\t\t// Check for default security keys\n\t\tcheckDefaultSecurityKeys()\n\n\t\tif flagNewUser != \"\" {\n\t\t\tif err := addUser(flagNewUser); err != nil {\n\t\t\t\treturn err\n\t\t\t}\n\t\t}\n\n\t\tif flagDelUser != \"\" {\n\t\t\tif err := delUser(flagDelUser); err != nil {\n\t\t\t\treturn err\n\t\t\t}\n\t\t}\n\n\t\tauthHandle := auth.GetAuthInstance()\n\n\t\tif flagSyncLDAP {\n\t\t\tif err := syncLDAP(authHandle); err != nil {\n\t\t\t\treturn err\n\t\t\t}\n\t\t}\n\n\t\tif flagGenJWT != \"\" {\n\t\t\tif err := generateJWT(authHandle, flagGenJWT); err != nil {\n\t\t\t\treturn err\n\t\t\t}\n\t\t}\n\t}\n\n\treturn nil\n}\n\n// checkDefaultSecurityKeys warns if default JWT keys are detected\nfunc checkDefaultSecurityKeys() {","numLines":38,"startLine":186,"totalLines":613}},"sourceToolAssistantUUID":"1efe182d-c68b-4690-abb9-e8ebee795e46","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"a981558e-ec62-41cf-a624-adb752b499f3","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_01EfDXHfoo24iTCHkHJuiF2t","type":"message","role":"assistant","content":[{"type":"thinking","thinking":"","signature":"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"}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":668,"cache_read_input_tokens":204430,"output_tokens":225,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":668,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":2,"output_tokens":225,"cache_read_input_tokens":204430,"cache_creation_input_tokens":668,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":668},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011CbjmtERLZVzJRxr4rhpJ9","type":"assistant","uuid":"37d8b19a-3d79-416b-b0ea-686a4222aa17","timestamp":"2026-06-05T08:11:10.975Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"37d8b19a-3d79-416b-b0ea-686a4222aa17","isSidechain":false,"message":{"model":"claude-opus-4-8","id":"msg_01EfDXHfoo24iTCHkHJuiF2t","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01QVvaHaMNXV4FCPYcCnV1jJ","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go","offset":405,"limit":75},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":668,"cache_read_input_tokens":204430,"output_tokens":225,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":668,"ephemeral_5m_input_tokens":0},"inference_geo":"not_available","iterations":[{"input_tokens":2,"output_tokens":225,"cache_read_input_tokens":204430,"cache_creation_input_tokens":668,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":668},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011CbjmtERLZVzJRxr4rhpJ9","type":"assistant","uuid":"c33c69ce-894a-4655-83ff-c8eeb3745796","timestamp":"2026-06-05T08:11:11.555Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
+{"parentUuid":"c33c69ce-894a-4655-83ff-c8eeb3745796","isSidechain":false,"promptId":"e03eec5c-111d-4cd6-a2ad-e4499d1dc6b1","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01QVvaHaMNXV4FCPYcCnV1jJ","type":"tool_result","content":"405\t\terrChan := make(chan error, 1)\n406\t\n407\t\t// Start HTTP server\n408\t\twg.Go(func() {\n409\t\t\tif err := srv.Start(ctx); err != nil {\n410\t\t\t\terrChan <- err\n411\t\t\t}\n412\t\t})\n413\t\n414\t\t// Handle shutdown signals\n415\t\twg.Add(1)\n416\t\tsigs := make(chan os.Signal, 1)\n417\t\tsignal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)\n418\t\tgo func() {\n419\t\t\tdefer wg.Done()\n420\t\t\tselect {\n421\t\t\tcase <-sigs:\n422\t\t\t\tcclog.Info(\"Shutdown signal received\")\n423\t\t\tcase <-ctx.Done():\n424\t\t\t}\n425\t\n426\t\t\truntime.SystemdNotify(false, \"Shutting down ...\")\n427\t\t\tsrv.Shutdown(ctx)\n428\t\t\tutil.FsWatcherShutdown()\n429\t\t\ttaskmanager.Shutdown()\n430\t\t}()\n431\t\n432\t\t// Set GC percent if not configured\n433\t\tif os.Getenv(envGOGC) == \"\" {\n434\t\t\t// trigger GC when heap grows 15% above the previous live set\n435\t\t\tdebug.SetGCPercent(15)\n436\t\t}\n437\t\truntime.SystemdNotify(true, \"running\")\n438\t\n439\t\twaitDone := make(chan struct{})\n440\t\tgo func() {\n441\t\t\twg.Wait()\n442\t\t\tclose(waitDone)\n443\t\t}()\n444\t\n445\t\tgo func() {\n446\t\t\t<-waitDone\n447\t\t\tclose(errChan)\n448\t\t}()\n449\t\n450\t\t// Wait for either:\n451\t\t// 1. An error from server startup\n452\t\t// 2. Completion of all goroutines (normal shutdown or crash)\n453\t\tvar runErr error\n454\t\tselect {\n455\t\tcase runErr = <-errChan:\n456\t\t\t// errChan will be closed when waitDone is closed, which happens\n457\t\t\t// when all goroutines complete (either from normal shutdown or error)\n458\t\tcase <-time.After(100 * time.Millisecond):\n459\t\t\t// Give the server 100ms to start and report any immediate startup errors\n460\t\t\t// After that, just wait for normal shutdown completion\n461\t\t\tselect {\n462\t\t\tcase runErr = <-errChan:\n463\t\t\tcase <-waitDone:\n464\t\t\t\t// Normal shutdown completed\n465\t\t\t}\n466\t\t}\n467\t\n468\t\tif runErr != nil {\n469\t\t\t// A subsystem failed (e.g. the HTTP server could not bind). Trigger the\n470\t\t\t// graceful-shutdown path for the subsystems that were already started\n471\t\t\t// (metricstore checkpoint, archiver flush, taskmanager) by cancelling the\n472\t\t\t// context the signal handler waits on, then wait for it to finish so we\n473\t\t\t// don't exit before the final checkpoint is written.\n474\t\t\tcancel()\n475\t\t\t<-waitDone\n476\t\t\treturn runErr\n477\t\t}\n478\t\n479\t\tcclog.Print(\"Graceful shutdown completed!\")"}]},"uuid":"21a90a14-1826-44ab-b773-9fa1a7089baa","timestamp":"2026-06-05T08:11:11.567Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go","content":"\terrChan := make(chan error, 1)\n\n\t// Start HTTP server\n\twg.Go(func() {\n\t\tif err := srv.Start(ctx); err != nil {\n\t\t\terrChan <- err\n\t\t}\n\t})\n\n\t// Handle shutdown signals\n\twg.Add(1)\n\tsigs := make(chan os.Signal, 1)\n\tsignal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)\n\tgo func() {\n\t\tdefer wg.Done()\n\t\tselect {\n\t\tcase <-sigs:\n\t\t\tcclog.Info(\"Shutdown signal received\")\n\t\tcase <-ctx.Done():\n\t\t}\n\n\t\truntime.SystemdNotify(false, \"Shutting down ...\")\n\t\tsrv.Shutdown(ctx)\n\t\tutil.FsWatcherShutdown()\n\t\ttaskmanager.Shutdown()\n\t}()\n\n\t// Set GC percent if not configured\n\tif os.Getenv(envGOGC) == \"\" {\n\t\t// trigger GC when heap grows 15% above the previous live set\n\t\tdebug.SetGCPercent(15)\n\t}\n\truntime.SystemdNotify(true, \"running\")\n\n\twaitDone := make(chan struct{})\n\tgo func() {\n\t\twg.Wait()\n\t\tclose(waitDone)\n\t}()\n\n\tgo func() {\n\t\t<-waitDone\n\t\tclose(errChan)\n\t}()\n\n\t// Wait for either:\n\t// 1. An error from server startup\n\t// 2. Completion of all goroutines (normal shutdown or crash)\n\tvar runErr error\n\tselect {\n\tcase runErr = <-errChan:\n\t\t// errChan will be closed when waitDone is closed, which happens\n\t\t// when all goroutines complete (either from normal shutdown or error)\n\tcase <-time.After(100 * time.Millisecond):\n\t\t// Give the server 100ms to start and report any immediate startup errors\n\t\t// After that, just wait for normal shutdown completion\n\t\tselect {\n\t\tcase runErr = <-errChan:\n\t\tcase <-waitDone:\n\t\t\t// Normal shutdown completed\n\t\t}\n\t}\n\n\tif runErr != nil {\n\t\t// A subsystem failed (e.g. the HTTP server could not bind). Trigger the\n\t\t// graceful-shutdown path for the subsystems that were already started\n\t\t// (metricstore checkpoint, archiver flush, taskmanager) by cancelling the\n\t\t// context the signal handler waits on, then wait for it to finish so we\n\t\t// don't exit before the final checkpoint is written.\n\t\tcancel()\n\t\t<-waitDone\n\t\treturn runErr\n\t}\n\n\tcclog.Print(\"Graceful shutdown completed!\")","numLines":75,"startLine":405,"totalLines":613}},"sourceToolAssistantUUID":"c33c69ce-894a-4655-83ff-c8eeb3745796","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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+{"parentUuid":"a9eb159f-dd6b-41e7-b872-1715e077c457","isSidechain":false,"promptId":"d39a588a-8c7c-45d2-8a26-d7e6513192e4","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01QTH17AUVG71coMonZ2Q2p3","type":"tool_result","content":"56ae1de0 Update ReleaseNotes\n87334972 Fix bug that prevents WAL cleanup on shutdown\n6cfa5113 Update release notes\n3bef199c Regenerate GraphQL\n16942f55 Fix medium-severity issues from follow-up security audit\n=== ReleaseNotes WAL entry present? ===\n1\n=== metricstore.go diff ===\ndiff --git a/pkg/metricstore/metricstore.go b/pkg/metricstore/metricstore.go\nindex 703c470e..8a73cde9 100644\n--- a/pkg/metricstore/metricstore.go\n+++ b/pkg/metricstore/metricstore.go\n@@ -275,10 +275,15 @@ func Shutdown() {\n \ttotalStart := time.Now()\n \n \tshutdownFuncMu.Lock()\n-\tdefer shutdownFuncMu.Unlock()\n-\tif shutdownFunc != nil {\n-\t\tshutdownFunc()\n+\tif shutdownFunc == nil {\n+\t\t// Already shut down (or never initialized): nothing to do. This keeps\n+\t\t// Shutdown idempotent so it is safe to call from more than one path.\n+\t\tshutdownFuncMu.Unlock()\n+\t\treturn\n \t}\n+\tshutdownFunc()\n+\tshutdownFunc = nil\n+\tshutdownFuncMu.Unlock()\n \tcclog.Infof(\"[METRICSTORE]> Background workers cancelled (%v)\", time.Since(totalStart))\n \n \tif Keys.Checkpoints.FileFormat == \"wal\" {","is_error":false}]},"uuid":"48c7517a-c8fd-4530-a5f5-fd110691ff5d","timestamp":"2026-06-05T08:16:14.476Z","toolUseResult":{"stdout":"56ae1de0 Update ReleaseNotes\n87334972 Fix bug that prevents WAL cleanup on shutdown\n6cfa5113 Update release notes\n3bef199c Regenerate GraphQL\n16942f55 Fix medium-severity issues from follow-up security audit\n=== ReleaseNotes WAL entry present? ===\n1\n=== metricstore.go diff ===\ndiff --git a/pkg/metricstore/metricstore.go b/pkg/metricstore/metricstore.go\nindex 703c470e..8a73cde9 100644\n--- a/pkg/metricstore/metricstore.go\n+++ b/pkg/metricstore/metricstore.go\n@@ -275,10 +275,15 @@ func Shutdown() {\n \ttotalStart := time.Now()\n \n \tshutdownFuncMu.Lock()\n-\tdefer shutdownFuncMu.Unlock()\n-\tif shutdownFunc != nil {\n-\t\tshutdownFunc()\n+\tif shutdownFunc == nil {\n+\t\t// Already shut down (or never initialized): nothing to do. This keeps\n+\t\t// Shutdown idempotent so it is safe to call from more than one path.\n+\t\tshutdownFuncMu.Unlock()\n+\t\treturn\n \t}\n+\tshutdownFunc()\n+\tshutdownFunc = nil\n+\tshutdownFuncMu.Unlock()\n \tcclog.Infof(\"[METRICSTORE]> Background workers cancelled (%v)\", time.Since(totalStart))\n \n \tif Keys.Checkpoints.FileFormat == \"wal\" {","stderr":"","interrupted":false,"isImage":false,"noOutputExpected":false},"sourceToolAssistantUUID":"a9eb159f-dd6b-41e7-b872-1715e077c457","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"fc14d957-e68b-4e12-97de-df33bed3cd63","version":"2.1.162","gitBranch":"release/v1.5","slug":"this-application-uses-a-shiny-flame"}
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diff --git a/3c/179f9caa8f/0/metadata.json b/3c/179f9caa8f/0/metadata.json
new file mode 100644
index 00000000..5ae1de6c
--- /dev/null
+++ b/3c/179f9caa8f/0/metadata.json
@@ -0,0 +1,41 @@
+{
+  "cli_version": "0.5.1",
+  "checkpoint_id": "3c179f9caa8f",
+  "session_id": "fc14d957-e68b-4e12-97de-df33bed3cd63",
+  "strategy": "manual-commit",
+  "created_at": "2026-06-05T08:16:31.839811Z",
+  "branch": "release/v1.5",
+  "checkpoints_count": 1,
+  "files_touched": [
+    "cmd/cc-backend/main.go",
+    "cmd/cc-backend/server.go",
+    "internal/api/nats.go",
+    "internal/archiver/archiveWorker.go",
+    "internal/auth/auth.go",
+    "pkg/metricstore/metricstore.go"
+  ],
+  "agent": "Claude Code",
+  "model": "claude-sonnet-4-6",
+  "turn_id": "30d245d6e8ae",
+  "checkpoint_transcript_start": 120,
+  "transcript_lines_at_start": 120,
+  "token_usage": {
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+    "cache_creation_tokens": 111162,
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+  "session_metrics": {
+    "turn_count": 3
+  },
+  "initial_attribution": {
+    "calculated_at": "2026-06-05T08:16:31.596431Z",
+    "agent_lines": 119,
+    "human_added": 0,
+    "human_modified": 0,
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+}
diff --git a/3c/179f9caa8f/0/prompt.txt b/3c/179f9caa8f/0/prompt.txt
new file mode 100644
index 00000000..3f1b4686
--- /dev/null
+++ b/3c/179f9caa8f/0/prompt.txt
@@ -0,0 +1 @@
+Do a thorough code  review with a focus on critical and severe issues. Initially focus on the initialization, startup and shutdown.
\ No newline at end of file
diff --git a/3c/179f9caa8f/metadata.json b/3c/179f9caa8f/metadata.json
new file mode 100644
index 00000000..46f05f25
--- /dev/null
+++ b/3c/179f9caa8f/metadata.json
@@ -0,0 +1,30 @@
+{
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+  "checkpoint_id": "3c179f9caa8f",
+  "strategy": "manual-commit",
+  "branch": "release/v1.5",
+  "checkpoints_count": 1,
+  "files_touched": [
+    "cmd/cc-backend/main.go",
+    "cmd/cc-backend/server.go",
+    "internal/api/nats.go",
+    "internal/archiver/archiveWorker.go",
+    "internal/auth/auth.go",
+    "pkg/metricstore/metricstore.go"
+  ],
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+}