From 493cee057179a37631924337f751107adde37aa0 Mon Sep 17 00:00:00 2001 From: Jan Eitzinger Date: Mon, 23 Mar 2026 07:12:13 +0100 Subject: [PATCH] Checkpoint: ccda3b2ff4cb Entire-Session: 6e440bb3-9fe0-4091-899c-996b475e09f2 Entire-Strategy: manual-commit Entire-Agent: Claude Code Ephemeral-branch: entire/e41d125-e3b0c4 --- cc/da3b2ff4cb/0/content_hash.txt | 1 + cc/da3b2ff4cb/0/full.jsonl | 20 +++++++++++++++++++ cc/da3b2ff4cb/0/metadata.json | 33 ++++++++++++++++++++++++++++++++ cc/da3b2ff4cb/metadata.json | 25 ++++++++++++++++++++++++ 4 files changed, 79 insertions(+) create mode 100644 cc/da3b2ff4cb/0/content_hash.txt create mode 100644 cc/da3b2ff4cb/0/full.jsonl create mode 100644 cc/da3b2ff4cb/0/metadata.json create mode 100644 cc/da3b2ff4cb/metadata.json diff --git a/cc/da3b2ff4cb/0/content_hash.txt b/cc/da3b2ff4cb/0/content_hash.txt new file mode 100644 index 00000000..3346bf6e --- /dev/null +++ b/cc/da3b2ff4cb/0/content_hash.txt @@ -0,0 +1 @@ +sha256:766da0e3e0e22bfc63c1b1d4b0c9aaf49f35ab3043c75e166135ac9e2aad0329 \ No newline at end of file diff --git a/cc/da3b2ff4cb/0/full.jsonl b/cc/da3b2ff4cb/0/full.jsonl new file mode 100644 index 00000000..0dc4a03b --- /dev/null +++ b/cc/da3b2ff4cb/0/full.jsonl @@ -0,0 +1,20 @@ +{"type":"file-history-snapshot","messageId":"46890d23-3008-48c6-8d91-7f5a5133fdea","snapshot":{"messageId":"46890d23-3008-48c6-8d91-7f5a5133fdea","trackedFileBackups":{},"timestamp":"2026-03-23T06:04:15.126Z"},"isSnapshotUpdate":false} +{"parentUuid":null,"isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"SessionStart","hookName":"SessionStart:clear","command":"entire hooks claude-code session-start"},"parentToolUseID":"651ef746-1f9c-4644-b25e-7ac5280da9cf","toolUseID":"651ef746-1f9c-4644-b25e-7ac5280da9cf","timestamp":"2026-03-23T06:04:15.072Z","uuid":"14b1699b-2644-4755-948e-052d8605858e","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"6e440bb3-9fe0-4091-899c-996b475e09f2","version":"2.1.80","gitBranch":"hotfix","slug":"agile-napping-otter"} +{"parentUuid":"14b1699b-2644-4755-948e-052d8605858e","isSidechain":false,"promptId":"4d4ff1d0-c37b-430c-b5af-4f820f6eca57","type":"user","message":{"role":"user","content":"Implement the following plan:\n\n# Fix: Line Protocol Parse Errors During Retention\n\n## Context\n\nDuring retention (`Free()` freeing 14M+ buffers), concurrent `/api/write` requests fail with truncated line protocol errors like `expected '=' after tag key \"hostna\"`. All errors report \"end of input\" at the same second as \"14794048 buffers freed\".\n\n**Root cause:** `http.Server.ReadTimeout = 20s` (`cmd/cc-backend/server.go:347`) sets a hard deadline on the TCP connection from acceptance time. The `/api/write` handler streams `r.Body` line-by-line via `lineprotocol.NewDecoder(r.Body)`, interleaving reads with `WriteToLevel()` calls. During retention, `freeAndCheckEmpty()` holds `root.lock.Lock()` while recursively freeing the entire tree (14M buffers). Every `DecodeLine` iteration blocks on `root.lock.RLock()` in `findLevelOrCreate`. Once 20 seconds elapse, the conn read deadline fires and `r.Body.Read()` returns a deadline error — the decoder reports \"end of input\" mid-parse.\n\n**Why `WriteTimeout` is not a concern here:** `WriteTimeout` only sets `net.Conn.SetWriteDeadline()` — it does not affect `Read()` on the body. If the handler takes >20s, the response write may fail (client sees broken connection), but all data that was decoded was already written to the store. No messages are lost.\n\n## Fix — `cmd/cc-backend/server.go`\n\nReplace `ReadTimeout` with `ReadHeaderTimeout`. Per Go docs, `ReadTimeout` covers the *entire* request including body — inappropriate for endpoints receiving large streaming batches. `ReadHeaderTimeout` only limits header reading (slowloris protection) while allowing body reads to block indefinitely on lock contention without truncation.\n\n### Changes\n\n1. Rename constant: `defaultReadTimeout` → `defaultReadHeaderTimeout`\n2. Rename variable: `readTimeout` → `readHeaderTimeout`\n3. Change `http.Server` field: `ReadTimeout` → `ReadHeaderTimeout`\n\n```go\nconst (\n\tdefaultReadHeaderTimeout = 20\n\tdefaultWriteTimeout = 20\n)\n\nfunc (s *Server) Start(ctx context.Context) error {\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\n### Why this is sufficient\n\nWith `ReadHeaderTimeout` instead of `ReadTimeout`:\n- **Body reads have no deadline.** Even if `DecodeLine` blocks for minutes on the root lock held by `Free()`, the body stream stays open. No truncation, no dropped messages.\n- **Header timeout still protects** against slowloris (slow-header) attacks.\n- **`WriteTimeout` is orthogonal** — it only affects writing the response. Worst case: client gets a connection error after data was already processed. This is the same behavior as any other slow handler and does not cause data loss.\n\n## Files to modify\n\n- `cmd/cc-backend/server.go` — lines 347–358\n\n## Verification\n\n- `go build ./cmd/cc-backend/...`\n- `go vet ./cmd/cc-backend/...`\n\n\nIf you need specific details from before exiting plan mode (like exact code snippets, error messages, or content you generated), read the full transcript at: /Users/jan/.claude/projects/-Users-jan-prg-ClusterCockpit-cc-backend/b843de8b-f396-4eb0-83ba-fb654a2b4072.jsonl"},"uuid":"46890d23-3008-48c6-8d91-7f5a5133fdea","timestamp":"2026-03-23T06:04:14.916Z","planContent":"# Fix: Line Protocol Parse Errors During Retention\n\n## Context\n\nDuring retention (`Free()` freeing 14M+ buffers), concurrent `/api/write` requests fail with truncated line protocol errors like `expected '=' after tag key \"hostna\"`. All errors report \"end of input\" at the same second as \"14794048 buffers freed\".\n\n**Root cause:** `http.Server.ReadTimeout = 20s` (`cmd/cc-backend/server.go:347`) sets a hard deadline on the TCP connection from acceptance time. The `/api/write` handler streams `r.Body` line-by-line via `lineprotocol.NewDecoder(r.Body)`, interleaving reads with `WriteToLevel()` calls. During retention, `freeAndCheckEmpty()` holds `root.lock.Lock()` while recursively freeing the entire tree (14M buffers). Every `DecodeLine` iteration blocks on `root.lock.RLock()` in `findLevelOrCreate`. Once 20 seconds elapse, the conn read deadline fires and `r.Body.Read()` returns a deadline error — the decoder reports \"end of input\" mid-parse.\n\n**Why `WriteTimeout` is not a concern here:** `WriteTimeout` only sets `net.Conn.SetWriteDeadline()` — it does not affect `Read()` on the body. If the handler takes >20s, the response write may fail (client sees broken connection), but all data that was decoded was already written to the store. No messages are lost.\n\n## Fix — `cmd/cc-backend/server.go`\n\nReplace `ReadTimeout` with `ReadHeaderTimeout`. Per Go docs, `ReadTimeout` covers the *entire* request including body — inappropriate for endpoints receiving large streaming batches. `ReadHeaderTimeout` only limits header reading (slowloris protection) while allowing body reads to block indefinitely on lock contention without truncation.\n\n### Changes\n\n1. Rename constant: `defaultReadTimeout` → `defaultReadHeaderTimeout`\n2. Rename variable: `readTimeout` → `readHeaderTimeout`\n3. Change `http.Server` field: `ReadTimeout` → `ReadHeaderTimeout`\n\n```go\nconst (\n\tdefaultReadHeaderTimeout = 20\n\tdefaultWriteTimeout = 20\n)\n\nfunc (s *Server) Start(ctx context.Context) error {\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\n### Why this is sufficient\n\nWith `ReadHeaderTimeout` instead of `ReadTimeout`:\n- **Body reads have no deadline.** Even if `DecodeLine` blocks for minutes on the root lock held by `Free()`, the body stream stays open. No truncation, no dropped messages.\n- **Header timeout still protects** against slowloris (slow-header) attacks.\n- **`WriteTimeout` is orthogonal** — it only affects writing the response. Worst case: client gets a connection error after data was already processed. 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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\"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/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// 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\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: true,\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\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\tdefaultReadTimeout = 20\n\tdefaultWriteTimeout = 20\n)\n\nfunc (s *Server) Start(ctx context.Context) error {\n\t// Use configurable timeouts with defaults\n\treadTimeout := time.Duration(defaultReadTimeout) * time.Second\n\twriteTimeout := time.Duration(defaultWriteTimeout) * time.Second\n\n\ts.server = &http.Server{\n\t\tReadTimeout: readTimeout,\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\t// Handle context cancellation for graceful shutdown\n\tgo func() {\n\t\t<-ctx.Done()\n\t\tshutdownCtx, cancel := context.WithTimeout(context.Background(), 30*time.Second)\n\t\tdefer cancel()\n\t\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n\t\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n\t\t}\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\t// Create a shutdown context with timeout\n\tshutdownCtx, cancel := context.WithTimeout(ctx, 30*time.Second)\n\tdefer cancel()\n\n\tnc := nats.GetClient()\n\tif nc != nil {\n\t\tnc.Close()\n\t}\n\n\t// First shut down the server gracefully (waiting for all ongoing requests)\n\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n\t}\n\n\t// Archive all the metric store data\n\tms := metricstore.GetMemoryStore()\n\n\tif ms != nil {\n\t\tmetricstore.Shutdown()\n\t}\n\n\t// Shutdown archiver with 10 second timeout for fast shutdown\n\tif err := archiver.Shutdown(10 * time.Second); err != nil {\n\t\tcclog.Warnf(\"Archiver shutdown: %v\", err)\n\t}\n}\n","structuredPatch":[{"oldStart":344,"oldLines":18,"newStart":344,"newLines":18,"lines":[" "," // Server timeout defaults (in seconds)"," const (","- defaultReadTimeout = 20","- defaultWriteTimeout = 20","+ defaultReadHeaderTimeout = 20","+ defaultWriteTimeout = 20"," )"," "," func (s *Server) Start(ctx context.Context) error {"," // Use configurable timeouts with defaults","- readTimeout := time.Duration(defaultReadTimeout) * time.Second","+ readHeaderTimeout := time.Duration(defaultReadHeaderTimeout) * time.Second"," writeTimeout := time.Duration(defaultWriteTimeout) * time.Second"," "," s.server = &http.Server{","- ReadTimeout: readTimeout,","- WriteTimeout: writeTimeout,","+ ReadHeaderTimeout: readHeaderTimeout,","+ WriteTimeout: writeTimeout,"," Handler: s.router,"," Addr: config.Keys.Addr,"," }"]}],"userModified":false,"replaceAll":false},"sourceToolAssistantUUID":"15740893-30f1-4fea-b03e-1ccd9d19a7fa","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"6e440bb3-9fe0-4091-899c-996b475e09f2","version":"2.1.80","gitBranch":"hotfix","slug":"agile-napping-otter"} +{"parentUuid":"0d373899-586e-4073-9036-c0341bb18462","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_016NfE9Mnxkp2fo8QAj54UyW","type":"message","role":"assistant","content":[{"type":"text","text":"Now let me verify it builds and passes vet."}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":400,"cache_read_input_tokens":20829,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":400},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZKWMwEcWvdb3W28wi7PB","type":"assistant","uuid":"b92a3497-3fc9-4cb5-abea-df0340c03446","timestamp":"2026-03-23T06:04:25.994Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"6e440bb3-9fe0-4091-899c-996b475e09f2","version":"2.1.80","gitBranch":"hotfix","slug":"agile-napping-otter"} +{"parentUuid":"b92a3497-3fc9-4cb5-abea-df0340c03446","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_016NfE9Mnxkp2fo8QAj54UyW","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01ESCH5E8B9qwoeVt2x8sEgd","name":"Bash","input":{"command":"go build ./cmd/cc-backend/... 2>&1","description":"Build cc-backend"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":400,"cache_read_input_tokens":20829,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":400},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZKWMwEcWvdb3W28wi7PB","type":"assistant","uuid":"4283e2c6-2e79-4ef2-a6c2-8a1a938abab0","timestamp":"2026-03-23T06:04:26.945Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"6e440bb3-9fe0-4091-899c-996b475e09f2","version":"2.1.80","gitBranch":"hotfix","slug":"agile-napping-otter"} +{"parentUuid":"4283e2c6-2e79-4ef2-a6c2-8a1a938abab0","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_016NfE9Mnxkp2fo8QAj54UyW","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01JZJJvUM5UJTdhYhBU73YqQ","name":"Bash","input":{"command":"go vet ./cmd/cc-backend/... 2>&1","description":"Vet cc-backend"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":400,"cache_read_input_tokens":20829,"output_tokens":206,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":400,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZKWMwEcWvdb3W28wi7PB","type":"assistant","uuid":"576582c1-8f1a-4455-9a3e-e5cdf6ec75f5","timestamp":"2026-03-23T06:04:27.543Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"6e440bb3-9fe0-4091-899c-996b475e09f2","version":"2.1.80","gitBranch":"hotfix","slug":"agile-napping-otter"} +{"parentUuid":"4283e2c6-2e79-4ef2-a6c2-8a1a938abab0","isSidechain":false,"promptId":"4d4ff1d0-c37b-430c-b5af-4f820f6eca57","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01ESCH5E8B9qwoeVt2x8sEgd","type":"tool_result","content":"(Bash completed with no output)","is_error":false}]},"uuid":"5df370a2-1fed-4d0b-85be-84658a93df83","timestamp":"2026-03-23T06:04:33.724Z","toolUseResult":{"stdout":"","stderr":"","interrupted":false,"isImage":false,"noOutputExpected":false},"sourceToolAssistantUUID":"4283e2c6-2e79-4ef2-a6c2-8a1a938abab0","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"6e440bb3-9fe0-4091-899c-996b475e09f2","version":"2.1.80","gitBranch":"hotfix","slug":"agile-napping-otter"} 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Changed `ReadTimeout` → `ReadHeaderTimeout` in `cmd/cc-backend/server.go`. 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