{"type":"file-history-snapshot","messageId":"9d4b018e-1e72-40c9-ad8f-0ced2ec2203d","snapshot":{"messageId":"9d4b018e-1e72-40c9-ad8f-0ced2ec2203d","trackedFileBackups":{},"timestamp":"2026-03-24T06:08:04.103Z"},"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":"6e260cff-3dd1-4550-96ab-ffef9a7491af","toolUseID":"6e260cff-3dd1-4550-96ab-ffef9a7491af","timestamp":"2026-03-24T06:08:04.050Z","uuid":"66dfc313-b312-4221-bcc7-cc3205ad2cc1","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix"}
{"parentUuid":"66dfc313-b312-4221-bcc7-cc3205ad2cc1","isSidechain":false,"promptId":"9c06da83-978e-44d9-be58-ed4a804b22e8","type":"user","message":{"role":"user","content":"<local-command-caveat>Caveat: The messages below were generated by the user while running local commands. DO NOT respond to these messages or otherwise consider them in your response unless the user explicitly asks you to.</local-command-caveat>"},"isMeta":true,"uuid":"de077705-20b4-4078-8221-447c9ac9bc31","timestamp":"2026-03-24T06:08:04.102Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix"}
{"parentUuid":"de077705-20b4-4078-8221-447c9ac9bc31","isSidechain":false,"promptId":"9c06da83-978e-44d9-be58-ed4a804b22e8","type":"user","message":{"role":"user","content":"<command-name>/clear</command-name>\n            <command-message>clear</command-message>\n            <command-args></command-args>"},"uuid":"9d4b018e-1e72-40c9-ad8f-0ced2ec2203d","timestamp":"2026-03-24T06:08:03.888Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix"}
{"parentUuid":"9d4b018e-1e72-40c9-ad8f-0ced2ec2203d","isSidechain":false,"type":"system","subtype":"local_command","content":"<local-command-stdout></local-command-stdout>","level":"info","timestamp":"2026-03-24T06:08:04.102Z","uuid":"c7d7d4e5-4d77-4c24-872b-a61547486a75","isMeta":false,"userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix"}
{"type":"file-history-snapshot","messageId":"31333ebb-5625-4704-898f-d051a650a9c0","snapshot":{"messageId":"31333ebb-5625-4704-898f-d051a650a9c0","trackedFileBackups":{},"timestamp":"2026-03-24T06:09:34.257Z"},"isSnapshotUpdate":false}
{"parentUuid":"c7d7d4e5-4d77-4c24-872b-a61547486a75","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","type":"user","message":{"role":"user","content":"The shutdown used to take only up to 10s. Since some time around a week the shutdown takes up to 40s. This may be linked to the worker pools added. Can the shutdown time be improved?"},"uuid":"31333ebb-5625-4704-898f-d051a650a9c0","timestamp":"2026-03-24T06:09:33.454Z","permissionMode":"plan","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"31333ebb-5625-4704-898f-d051a650a9c0","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01YXaQWVwbAeW4KAkPGnxXkY","type":"message","role":"assistant","content":[{"type":"thinking","thinking":"","signature":"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"}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":3,"cache_creation_input_tokens":12225,"cache_read_input_tokens":8655,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":12225},"output_tokens":9,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZMQZoZtRuLZKHKtte7fh","type":"assistant","uuid":"661956a4-5dc2-4ba3-af21-fcafdc4d8476","timestamp":"2026-03-24T06:09:40.012Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"661956a4-5dc2-4ba3-af21-fcafdc4d8476","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01YXaQWVwbAeW4KAkPGnxXkY","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01K3M4GtnfMya8DABUyjdV4Q","name":"Agent","input":{"subagent_type":"Explore","description":"Explore shutdown and worker pool code","prompt":"I need to understand the shutdown flow and worker pool implementation in this Go backend. The shutdown time has increased from ~10s to ~40s, possibly due to recently added worker pools.\n\nPlease find and trace:\n\n1. The main shutdown flow in `cmd/cc-backend/` — how the server shuts down, what timeout is used, what cleanup happens\n2. Any worker pool implementations — look for goroutine pools, worker patterns, especially recently added ones\n3. NATS shutdown/cleanup code in `internal/api/nats.go`\n4. The metricstore shutdown in `pkg/metricstore/`\n5. Any hardcoded timeout values related to shutdown (look for context.WithTimeout, time.After, signal handling, etc.)\n\nBe very thorough — search for \"Shutdown\", \"shutdown\", \"graceful\", \"worker\", \"pool\", \"drain\", \"Close\", \"signal\", \"SIGTERM\", \"SIGINT\" across the codebase. Report exact file paths, line numbers, and the relevant code snippets."},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":3,"cache_creation_input_tokens":12225,"cache_read_input_tokens":8655,"output_tokens":384,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":12225,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZMQZoZtRuLZKHKtte7fh","type":"assistant","uuid":"311d2796-2e7e-43f4-afcb-4907f870af13","timestamp":"2026-03-24T06:09:46.580Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"311d2796-2e7e-43f4-afcb-4907f870af13","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PreToolUse","hookName":"PreToolUse:Agent","command":"entire hooks claude-code pre-task"},"toolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"bf4d4507-08db-407b-a716-cb540c55c3ef","timestamp":"2026-03-24T06:09:46.581Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"bf4d4507-08db-407b-a716-cb540c55c3ef","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"type":"text","text":"I need to understand the shutdown flow and worker pool implementation in this Go backend. The shutdown time has increased from ~10s to ~40s, possibly due to recently added worker pools.\n\nPlease find and trace:\n\n1. The main shutdown flow in `cmd/cc-backend/` — how the server shuts down, what timeout is used, what cleanup happens\n2. Any worker pool implementations — look for goroutine pools, worker patterns, especially recently added ones\n3. NATS shutdown/cleanup code in `internal/api/nats.go`\n4. The metricstore shutdown in `pkg/metricstore/`\n5. Any hardcoded timeout values related to shutdown (look for context.WithTimeout, time.After, signal handling, etc.)\n\nBe very thorough — search for \"Shutdown\", \"shutdown\", \"graceful\", \"worker\", \"pool\", \"drain\", \"Close\", \"signal\", \"SIGTERM\", \"SIGINT\" across the codebase. Report exact file paths, line numbers, and the relevant code snippets."}]},"uuid":"fa67f14a-1a53-4bd5-9cf3-47c7d34ca3fb","timestamp":"2026-03-24T06:09:46.955Z"},"type":"agent_progress","prompt":"I need to understand the shutdown flow and worker pool implementation in this Go backend. The shutdown time has increased from ~10s to ~40s, possibly due to recently added worker pools.\n\nPlease find and trace:\n\n1. The main shutdown flow in `cmd/cc-backend/` — how the server shuts down, what timeout is used, what cleanup happens\n2. Any worker pool implementations — look for goroutine pools, worker patterns, especially recently added ones\n3. NATS shutdown/cleanup code in `internal/api/nats.go`\n4. The metricstore shutdown in `pkg/metricstore/`\n5. Any hardcoded timeout values related to shutdown (look for context.WithTimeout, time.After, signal handling, etc.)\n\nBe very thorough — search for \"Shutdown\", \"shutdown\", \"graceful\", \"worker\", \"pool\", \"drain\", \"Close\", \"signal\", \"SIGTERM\", \"SIGINT\" across the codebase. Report exact file paths, line numbers, and the relevant code snippets.","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"330e8163-9658-47fa-8e40-d82b3015729d","timestamp":"2026-03-24T06:09:46.956Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"330e8163-9658-47fa-8e40-d82b3015729d","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:09:48.945Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_017DHHTHKwMLkZDzxErepD9E","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_019ZrmqdvEAaMxR5tMcUnGeM","name":"Bash","input":{"command":"find . -type f -name \"*.go\" | head -20"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":3,"cache_creation_input_tokens":18154,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":18154,"ephemeral_1h_input_tokens":0},"output_tokens":3,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQajiVYY3Uvo7Z8AtFi","uuid":"c43c0049-d070-49af-b5d9-8497ca2443c5"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"72033e53-fef3-40e2-88f5-f2488faf6157","timestamp":"2026-03-24T06:09:48.948Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"72033e53-fef3-40e2-88f5-f2488faf6157","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_019ZrmqdvEAaMxR5tMcUnGeM","type":"tool_result","content":"./cmd/cc-backend/server.go\n./cmd/cc-backend/cli.go\n./cmd/cc-backend/init.go\n./cmd/cc-backend/main.go\n./tools/archive-migration/transforms.go\n./tools/archive-migration/main.go\n./tools/archive-manager/import_test.go\n./tools/archive-manager/main.go\n./tools/gen-keypair/main.go\n./tools/convert-pem-pubkey/main.go\n./web/webConfig_test.go\n./web/web.go\n./web/configSchema.go\n./internal/repository/dbConnection.go\n./internal/repository/config.go\n./internal/repository/jobFind.go\n./internal/repository/jobHooks.go\n./internal/repository/hooks.go\n./internal/repository/user.go\n./internal/repository/user_test.go","is_error":false}]},"uuid":"1c48e765-a46b-44e4-84c3-8e50d85dea89","timestamp":"2026-03-24T06:09:49.217Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"adbc1e62-00cb-4e73-971e-86e54588a580","timestamp":"2026-03-24T06:09:49.218Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"adbc1e62-00cb-4e73-971e-86e54588a580","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:09:50.564Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01CoJMeZzbkLrKpEFjDbimqu","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01AUfoN8jKqQr8ZhjkXo7zek","name":"Grep","input":{"pattern":"Shutdown|shutdown|graceful","type":"go","output_mode":"files_with_matches"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":5,"cache_creation_input_tokens":606,"cache_read_input_tokens":18154,"cache_creation":{"ephemeral_5m_input_tokens":606,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQauEUux3YYqfdbZopM","uuid":"0686c210-2e9a-461e-a880-57fb53337f46"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"c4b6b164-7bbd-4f4a-ac8a-7b0cdb58a8a3","timestamp":"2026-03-24T06:09:50.565Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"c4b6b164-7bbd-4f4a-ac8a-7b0cdb58a8a3","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01AUfoN8jKqQr8ZhjkXo7zek","type":"tool_result","content":"Found 12 files\npkg/metricstore/walCheckpoint.go\npkg/metricstore/metricstore.go\ninternal/api/api_test.go\ninternal/archiver/archiver.go\ncmd/cc-backend/main.go\ncmd/cc-backend/server.go\npkg/metricstore/checkpoint.go\ninternal/repository/tags.go\ntools/archive-manager/main.go\ninternal/taskmanager/taskManager.go\ninternal/archiver/archiveWorker.go\ninternal/api/nats_test.go"}]},"uuid":"34f94258-7c56-43ff-8413-19b71dcc1f6d","timestamp":"2026-03-24T06:09:50.599Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"7db190ec-d9bd-4f55-8e8c-347adadbe26f","timestamp":"2026-03-24T06:09:51.012Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"7db190ec-d9bd-4f55-8e8c-347adadbe26f","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:09:51.223Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01CoJMeZzbkLrKpEFjDbimqu","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01RQeoCsAe5bxQ8K9KZXapG5","name":"Grep","input":{"pattern":"worker|pool|Pool|Worker|goroutine.*spawn|go func|goroutine.*pool","type":"go","output_mode":"files_with_matches"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":5,"cache_creation_input_tokens":606,"cache_read_input_tokens":18154,"cache_creation":{"ephemeral_5m_input_tokens":606,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQauEUux3YYqfdbZopM","uuid":"7c809257-bc51-4285-8c15-bed3d5c630cd"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"0d52f859-289f-4561-b816-0f221be0e1e6","timestamp":"2026-03-24T06:09:51.224Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"0d52f859-289f-4561-b816-0f221be0e1e6","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01RQeoCsAe5bxQ8K9KZXapG5","type":"tool_result","content":"Found 30 files\npkg/metricstore/walCheckpoint.go\npkg/metricstore/archive.go\npkg/metricstore/metricstore.go\ninternal/config/schema.go\ncmd/cc-backend/main.go\ncmd/cc-backend/server.go\ncmd/cc-backend/init.go\npkg/metricstore/lineprotocol.go\npkg/archive/sqliteBackend.go\ninternal/repository/job.go\ninternal/auth/auth.go\ninternal/api/nats.go\npkg/metricstore/configSchema.go\npkg/metricstore/level.go\npkg/metricstore/checkpoint.go\npkg/metricstore/config.go\npkg/metricstore/buffer.go\ninternal/tagger/tagger.go\ntools/archive-manager/main.go\ntools/archive-migration/main.go\ntools/archive-migration/transforms.go\npkg/metricstore/metricstore_test.go\npkg/archive/s3Backend.go\npkg/archive/fsBackend.go\ninternal/taskmanager/taskManager.go\ninternal/taskmanager/updateDurationService.go\ninternal/taskmanager/updateFootprintService.go\ninternal/taskmanager/commitJobService.go\ninternal/archiver/archiveWorker.go\ninternal/taskmanager/taskManager_test.go"}]},"uuid":"1f727690-e129-47a0-956e-5ff3a763357d","timestamp":"2026-03-24T06:09:51.254Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"467c9793-0965-4c45-bc3e-3df48b659b8b","timestamp":"2026-03-24T06:09:51.438Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"467c9793-0965-4c45-bc3e-3df48b659b8b","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:09:51.642Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01CoJMeZzbkLrKpEFjDbimqu","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01MbF6UyANWhFBphzTdVmZ2W","name":"Grep","input":{"pattern":"SIGTERM|SIGINT|signal.*Notify|notify.*signal","type":"go","output_mode":"files_with_matches"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":5,"cache_creation_input_tokens":606,"cache_read_input_tokens":18154,"cache_creation":{"ephemeral_5m_input_tokens":606,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQauEUux3YYqfdbZopM","uuid":"33f5f035-9bf1-4ed8-a722-3bdfc03ea6d6"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"f9b0d12d-f35c-49bb-9aae-b3748414ca99","timestamp":"2026-03-24T06:09:51.643Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"f9b0d12d-f35c-49bb-9aae-b3748414ca99","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01MbF6UyANWhFBphzTdVmZ2W","type":"tool_result","content":"Found 2 files\ncmd/cc-backend/main.go\ntools/archive-manager/main.go"}]},"uuid":"520cebbd-6e48-4f6c-a112-a0fe33fafecf","timestamp":"2026-03-24T06:09:51.670Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"3d3716e1-7029-48a7-a185-00ec28a32931","timestamp":"2026-03-24T06:09:51.912Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"3d3716e1-7029-48a7-a185-00ec28a32931","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:09:51.967Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01CoJMeZzbkLrKpEFjDbimqu","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_016NfAHif1oAx3KYHat2Ndm2","name":"Grep","input":{"pattern":"WithTimeout|context\\.Timeout|time\\.After|time\\.Sleep|timeout","type":"go","output_mode":"files_with_matches"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":5,"cache_creation_input_tokens":606,"cache_read_input_tokens":18154,"cache_creation":{"ephemeral_5m_input_tokens":606,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQauEUux3YYqfdbZopM","uuid":"ff6fb9a5-e7de-438e-80fe-d3eff52eb123"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"71491fd2-e955-421b-92c2-defafe87b02c","timestamp":"2026-03-24T06:09:51.967Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"71491fd2-e955-421b-92c2-defafe87b02c","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_016NfAHif1oAx3KYHat2Ndm2","type":"tool_result","content":"Found 21 files\ninternal/routerConfig/routes.go\ninternal/metricdispatch/dataLoader.go\ninternal/metricstoreclient/cc-metric-store.go\ninternal/config/schema.go\ninternal/api/api_test.go\ninternal/api/job.go\ninternal/archiver/archiver.go\ninternal/config/config.go\ncmd/cc-backend/main.go\ncmd/cc-backend/server.go\npkg/archive/sqliteBackend.go\ninternal/repository/dbConnection.go\ninternal/repository/config.go\ninternal/repository/repository_test.go\ninternal/repository/jobCreate_test.go\ninternal/repository/hooks_test.go\ninternal/auth/oidc.go\ninternal/auth/auth_test.go\ninternal/archiver/archiveWorker.go\ninternal/api/nats_test.go\ninternal/api/docs.go"}]},"uuid":"cb0c6c9f-0d11-4959-a937-6cc066423cfe","timestamp":"2026-03-24T06:09:51.982Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"e4b8b0fd-1b90-4535-a962-11d59012abdf","timestamp":"2026-03-24T06:09:51.984Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"e4b8b0fd-1b90-4535-a962-11d59012abdf","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:09:53.304Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01AFSzUehf5um2UFhFrjvd1K","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01SRY4NG8wySX1FA9rzVNod7","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":6,"cache_creation_input_tokens":1490,"cache_read_input_tokens":18760,"cache_creation":{"ephemeral_5m_input_tokens":1490,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQb6yBJjiSbkD9Ka5yW","uuid":"0ebbe76f-525a-43ba-9f16-588465074449"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"959cf1e5-59be-428a-a37f-479dea2e9c7e","timestamp":"2026-03-24T06:09:53.304Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"959cf1e5-59be-428a-a37f-479dea2e9c7e","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:09:53.519Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01AFSzUehf5um2UFhFrjvd1K","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_016u5mERZenFFzcxpKtBtdTu","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":6,"cache_creation_input_tokens":1490,"cache_read_input_tokens":18760,"cache_creation":{"ephemeral_5m_input_tokens":1490,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQb6yBJjiSbkD9Ka5yW","uuid":"cfbb2702-165e-4cd8-bad8-fe22128f464b"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"5b4fc03f-baa3-4f32-a6c0-f310121dcb57","timestamp":"2026-03-24T06:09:53.520Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"5b4fc03f-baa3-4f32-a6c0-f310121dcb57","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01SRY4NG8wySX1FA9rzVNod7","type":"tool_result","content":"     1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n     2→// All rights reserved. This file is part of cc-backend.\n     3→// Use of this source code is governed by a MIT-style\n     4→// license that can be found in the LICENSE file.\n     5→\n     6→// Package main provides the entry point for the ClusterCockpit backend server.\n     7→// It orchestrates initialization of all subsystems including configuration,\n     8→// database, authentication, and the HTTP server.\n     9→package main\n    10→\n    11→import (\n    12→\t\"context\"\n    13→\t\"encoding/json\"\n    14→\t\"fmt\"\n    15→\t\"os\"\n    16→\t\"os/signal\"\n    17→\tgoruntime \"runtime\"\n    18→\t\"runtime/debug\"\n    19→\t\"strings\"\n    20→\t\"sync\"\n    21→\t\"syscall\"\n    22→\t\"time\"\n    23→\n    24→\t\"github.com/ClusterCockpit/cc-backend/internal/archiver\"\n    25→\t\"github.com/ClusterCockpit/cc-backend/internal/auth\"\n    26→\t\"github.com/ClusterCockpit/cc-backend/internal/config\"\n    27→\t\"github.com/ClusterCockpit/cc-backend/internal/importer\"\n    28→\t\"github.com/ClusterCockpit/cc-backend/internal/metricdispatch\"\n    29→\t\"github.com/ClusterCockpit/cc-backend/internal/repository\"\n    30→\t\"github.com/ClusterCockpit/cc-backend/internal/tagger\"\n    31→\t\"github.com/ClusterCockpit/cc-backend/internal/taskmanager\"\n    32→\t\"github.com/ClusterCockpit/cc-backend/pkg/archive\"\n    33→\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n    34→\t\"github.com/ClusterCockpit/cc-backend/web\"\n    35→\tccconf \"github.com/ClusterCockpit/cc-lib/v2/ccConfig\"\n    36→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n    37→\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n    38→\t\"github.com/ClusterCockpit/cc-lib/v2/runtime\"\n    39→\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n    40→\t\"github.com/ClusterCockpit/cc-lib/v2/util\"\n    41→\t\"github.com/google/gops/agent\"\n    42→\t\"github.com/joho/godotenv\"\n    43→\n    44→\t_ \"github.com/mattn/go-sqlite3\"\n    45→)\n    46→\n    47→const logoString = `\n    48→ _____ _           _             ____           _          _ _\n    49→/  ___| |_   _ ___| |_ ___ _ __ / ___|___   ___| | ___ __ (_) |_\n    50→| |   | | | | / __| __/ _ \\ '__| |   / _ \\ / __| |/ / '_ \\| | __|\n    51→| |___| | |_| \\__ \\ ||  __/ |  | |__| (_) | (__|   <| |_) | | |_\n    52→\\_____|_|\\__,_|___/\\__\\___|_|   \\____\\___/ \\___|_|\\_\\ .__/|_|\\__|\n    53→                                                    |_|\n    54→`\n    55→\n    56→// Environment variable names\n    57→const (\n    58→\tenvGOGC = \"GOGC\"\n    59→)\n    60→\n    61→// Default configurations\n    62→const (\n    63→\tdefaultArchiveConfig = `{\"kind\":\"file\",\"path\":\"./var/job-archive\"}`\n    64→)\n    65→\n    66→var (\n    67→\tdate    string\n    68→\tcommit  string\n    69→\tversion string\n    70→)\n    71→\n    72→func printVersion() {\n    73→\tfmt.Print(logoString)\n    74→\tfmt.Printf(\"Version:\\t%s\\n\", version)\n    75→\tfmt.Printf(\"Git hash:\\t%s\\n\", commit)\n    76→\tfmt.Printf(\"Build time:\\t%s\\n\", date)\n    77→\tfmt.Printf(\"SQL db version:\\t%d\\n\", repository.Version)\n    78→\tfmt.Printf(\"Job archive version:\\t%d\\n\", archive.Version)\n    79→}\n    80→\n    81→func initGops() error {\n    82→\tif !flagGops {\n    83→\t\treturn nil\n    84→\t}\n    85→\n    86→\tif err := agent.Listen(agent.Options{}); err != nil {\n    87→\t\treturn fmt.Errorf(\"starting gops agent: %w\", err)\n    88→\t}\n    89→\treturn nil\n    90→}\n    91→\n    92→func loadEnvironment() error {\n    93→\tif err := godotenv.Load(); err != nil {\n    94→\t\treturn fmt.Errorf(\"loading .env file: %w\", err)\n    95→\t}\n    96→\treturn nil\n    97→}\n    98→\n    99→func initConfiguration() error {\n   100→\tccconf.Init(flagConfigFile)\n   101→\n   102→\tcfg := ccconf.GetPackageConfig(\"main\")\n   103→\tif cfg == nil {\n   104→\t\treturn fmt.Errorf(\"main configuration must be present\")\n   105→\t}\n   106→\n   107→\tconfig.Init(cfg)\n   108→\treturn nil\n   109→}\n   110→\n   111→func initDatabase() error {\n   112→\tif config.Keys.DbConfig != nil {\n   113→\t\tcfg := repository.DefaultConfig()\n   114→\t\tdc := config.Keys.DbConfig\n   115→\t\tif dc.CacheSizeMB > 0 {\n   116→\t\t\tcfg.DbCacheSizeMB = dc.CacheSizeMB\n   117→\t\t}\n   118→\t\tif dc.SoftHeapLimitMB > 0 {\n   119→\t\t\tcfg.DbSoftHeapLimitMB = dc.SoftHeapLimitMB\n   120→\t\t}\n   121→\t\tif dc.MaxOpenConnections > 0 {\n   122→\t\t\tcfg.MaxOpenConnections = dc.MaxOpenConnections\n   123→\t\t}\n   124→\t\tif dc.MaxIdleConnections > 0 {\n   125→\t\t\tcfg.MaxIdleConnections = dc.MaxIdleConnections\n   126→\t\t}\n   127→\t\tif dc.ConnectionMaxIdleTimeMins > 0 {\n   128→\t\t\tcfg.ConnectionMaxIdleTime = time.Duration(dc.ConnectionMaxIdleTimeMins) * time.Minute\n   129→\t\t}\n   130→\t\tif dc.BusyTimeoutMs > 0 {\n   131→\t\t\tcfg.BusyTimeoutMs = dc.BusyTimeoutMs\n   132→\t\t}\n   133→\t\trepository.SetConfig(cfg)\n   134→\t}\n   135→\trepository.Connect(config.Keys.DB)\n   136→\treturn nil\n   137→}\n   138→\n   139→func handleDatabaseCommands() error {\n   140→\tif flagMigrateDB {\n   141→\t\terr := repository.MigrateDB(config.Keys.DB)\n   142→\t\tif err != nil {\n   143→\t\t\treturn fmt.Errorf(\"migrating database to version %d: %w\", repository.Version, err)\n   144→\t\t}\n   145→\t\tcclog.Exitf(\"MigrateDB Success: Migrated SQLite database at '%s' to version %d.\\n\",\n   146→\t\t\tconfig.Keys.DB, repository.Version)\n   147→\t}\n   148→\n   149→\tif flagRevertDB {\n   150→\t\terr := repository.RevertDB(config.Keys.DB)\n   151→\t\tif err != nil {\n   152→\t\t\treturn fmt.Errorf(\"reverting database to version %d: %w\", repository.Version-1, err)\n   153→\t\t}\n   154→\t\tcclog.Exitf(\"RevertDB Success: Reverted SQLite database at '%s' to version %d.\\n\",\n   155→\t\t\tconfig.Keys.DB, repository.Version-1)\n   156→\t}\n   157→\n   158→\tif flagForceDB {\n   159→\t\terr := repository.ForceDB(config.Keys.DB)\n   160→\t\tif err != nil {\n   161→\t\t\treturn fmt.Errorf(\"forcing database to version %d: %w\", repository.Version, err)\n   162→\t\t}\n   163→\t\tcclog.Exitf(\"ForceDB Success: Forced SQLite database at '%s' to version %d.\\n\",\n   164→\t\t\tconfig.Keys.DB, repository.Version)\n   165→\t}\n   166→\n   167→\treturn nil\n   168→}\n   169→\n   170→func handleUserCommands() error {\n   171→\tif config.Keys.DisableAuthentication && (flagNewUser != \"\" || flagDelUser != \"\") {\n   172→\t\treturn fmt.Errorf(\"--add-user and --del-user can only be used if authentication is enabled\")\n   173→\t}\n   174→\n   175→\tif !config.Keys.DisableAuthentication {\n   176→\t\tif cfg := ccconf.GetPackageConfig(\"auth\"); cfg != nil {\n   177→\t\t\tauth.Init(&cfg)\n   178→\t\t} else {\n   179→\t\t\tcclog.Warn(\"Authentication disabled due to missing configuration\")\n   180→\t\t\tauth.Init(nil)\n   181→\t\t}\n   182→\n   183→\t\t// Check for default security keys\n   184→\t\tcheckDefaultSecurityKeys()\n   185→\n   186→\t\tif flagNewUser != \"\" {\n   187→\t\t\tif err := addUser(flagNewUser); err != nil {\n   188→\t\t\t\treturn err\n   189→\t\t\t}\n   190→\t\t}\n   191→\n   192→\t\tif flagDelUser != \"\" {\n   193→\t\t\tif err := delUser(flagDelUser); err != nil {\n   194→\t\t\t\treturn err\n   195→\t\t\t}\n   196→\t\t}\n   197→\n   198→\t\tauthHandle := auth.GetAuthInstance()\n   199→\n   200→\t\tif flagSyncLDAP {\n   201→\t\t\tif err := syncLDAP(authHandle); err != nil {\n   202→\t\t\t\treturn err\n   203→\t\t\t}\n   204→\t\t}\n   205→\n   206→\t\tif flagGenJWT != \"\" {\n   207→\t\t\tif err := generateJWT(authHandle, flagGenJWT); err != nil {\n   208→\t\t\t\treturn err\n   209→\t\t\t}\n   210→\t\t}\n   211→\t}\n   212→\n   213→\treturn nil\n   214→}\n   215→\n   216→// checkDefaultSecurityKeys warns if default JWT keys are detected\n   217→func checkDefaultSecurityKeys() {\n   218→\t// Default JWT public key from init.go\n   219→\tdefaultJWTPublic := \"REDACTED\"\n   220→\n   221→\tif os.Getenv(\"JWT_PUBLIC_KEY\") == defaultJWTPublic {\n   222→\t\tcclog.Warn(\"Using default JWT keys - not recommended for production environments\")\n   223→\t}\n   224→}\n   225→\n   226→func addUser(userSpec string) error {\n   227→\tparts := strings.SplitN(userSpec, \":\", 3)\n   228→\tif len(parts) != 3 || len(parts[0]) == 0 {\n   229→\t\treturn fmt.Errorf(\"invalid user format, want: <username>:[admin,support,manager,api,user]:<password>, have: %s\", userSpec)\n   230→\t}\n   231→\n   232→\tur := repository.GetUserRepository()\n   233→\tif err := ur.AddUser(&schema.User{\n   234→\t\tUsername: parts[0],\n   235→\t\tProjects: make([]string, 0),\n   236→\t\tPassword: parts[2],\n   237→\t\tRoles:    strings.Split(parts[1], \",\"),\n   238→\t}); err != nil {\n   239→\t\treturn fmt.Errorf(\"adding user '%s' with roles '%s': %w\", parts[0], parts[1], err)\n   240→\t}\n   241→\n   242→\tcclog.Infof(\"Add User: Added new user '%s' with roles '%s'\", parts[0], parts[1])\n   243→\treturn nil\n   244→}\n   245→\n   246→func delUser(username string) error {\n   247→\tur := repository.GetUserRepository()\n   248→\tif err := ur.DelUser(username); err != nil {\n   249→\t\treturn fmt.Errorf(\"deleting user '%s': %w\", username, err)\n   250→\t}\n   251→\tcclog.Infof(\"Delete User: Deleted user '%s' from DB\", username)\n   252→\treturn nil\n   253→}\n   254→\n   255→func syncLDAP(authHandle *auth.Authentication) error {\n   256→\tif authHandle.LdapAuth == nil {\n   257→\t\treturn fmt.Errorf(\"LDAP authentication is not configured\")\n   258→\t}\n   259→\n   260→\tif err := authHandle.LdapAuth.Sync(); err != nil {\n   261→\t\treturn fmt.Errorf(\"synchronizing LDAP: %w\", err)\n   262→\t}\n   263→\n   264→\tcclog.Print(\"Sync LDAP: LDAP synchronization successfull.\")\n   265→\treturn nil\n   266→}\n   267→\n   268→func generateJWT(authHandle *auth.Authentication, username string) error {\n   269→\tur := repository.GetUserRepository()\n   270→\tuser, err := ur.GetUser(username)\n   271→\tif err != nil {\n   272→\t\treturn fmt.Errorf(\"getting user '%s': %w\", username, err)\n   273→\t}\n   274→\n   275→\tif !user.HasRole(schema.RoleAPI) {\n   276→\t\tcclog.Warnf(\"JWT: User '%s' does not have the role 'api'. REST API endpoints will return error!\\n\", user.Username)\n   277→\t}\n   278→\n   279→\tjwt, err := authHandle.JwtAuth.ProvideJWT(user)\n   280→\tif err != nil {\n   281→\t\treturn fmt.Errorf(\"generating JWT for user '%s': %w\", user.Username, err)\n   282→\t}\n   283→\n   284→\tcclog.Printf(\"JWT: Successfully generated JWT for user '%s': %s\\n\", user.Username, jwt)\n   285→\treturn nil\n   286→}\n   287→\n   288→func initSubsystems() error {\n   289→\t// Initialize nats client\n   290→\tnatsConfig := ccconf.GetPackageConfig(\"nats\")\n   291→\tif err := nats.Init(natsConfig); err != nil {\n   292→\t\tcclog.Warnf(\"initializing (optional) nats client: %s\", err.Error())\n   293→\t}\n   294→\tnats.Connect()\n   295→\n   296→\t// Initialize job archive\n   297→\tarchiveCfg := ccconf.GetPackageConfig(\"archive\")\n   298→\tif archiveCfg == nil {\n   299→\t\tcclog.Debug(\"Archive configuration not found, using default archive configuration\")\n   300→\t\tarchiveCfg = json.RawMessage(defaultArchiveConfig)\n   301→\t}\n   302→\tif err := archive.Init(archiveCfg); err != nil {\n   303→\t\treturn fmt.Errorf(\"initializing archive: %w\", err)\n   304→\t}\n   305→\n   306→\t// Handle database re-initialization\n   307→\tif flagReinitDB {\n   308→\t\tif err := importer.InitDB(); err != nil {\n   309→\t\t\treturn fmt.Errorf(\"re-initializing repository DB: %w\", err)\n   310→\t\t}\n   311→\t\tcclog.Print(\"Init DB: Successfully re-initialized repository DB.\")\n   312→\t}\n   313→\n   314→\t// Handle job import\n   315→\tif flagImportJob != \"\" {\n   316→\t\tif err := importer.HandleImportFlag(flagImportJob); err != nil {\n   317→\t\t\treturn fmt.Errorf(\"importing job: %w\", err)\n   318→\t\t}\n   319→\t\tcclog.Infof(\"Import Job: Imported Job '%s' into DB\", flagImportJob)\n   320→\t}\n   321→\n   322→\t// Initialize taggers\n   323→\tif config.Keys.EnableJobTaggers {\n   324→\t\ttagger.Init()\n   325→\t}\n   326→\n   327→\t// Apply tags if requested\n   328→\tif flagApplyTags {\n   329→\t\ttagger.Init()\n   330→\n   331→\t\tif err := tagger.RunTaggers(); err != nil {\n   332→\t\t\treturn fmt.Errorf(\"running job taggers: %w\", err)\n   333→\t\t}\n   334→\t}\n   335→\n   336→\treturn nil\n   337→}\n   338→\n   339→func runServer(ctx context.Context) error {\n   340→\tvar wg sync.WaitGroup\n   341→\n   342→\t// Initialize metric store if configuration is provided\n   343→\thaveMetricstore := false\n   344→\tmscfg := ccconf.GetPackageConfig(\"metric-store\")\n   345→\tif mscfg != nil {\n   346→\t\tmetrics := metricstore.BuildMetricList()\n   347→\t\tmetricstore.Init(mscfg, metrics, &wg)\n   348→\n   349→\t\t// Inject repository as NodeProvider to break import cycle\n   350→\t\tms := metricstore.GetMemoryStore()\n   351→\t\tjobRepo := repository.GetJobRepository()\n   352→\t\tms.SetNodeProvider(jobRepo)\n   353→\t\tmetricstore.MetricStoreHandle = &metricstore.InternalMetricStore{}\n   354→\t\thaveMetricstore = true\n   355→\t} else {\n   356→\t\tmetricstore.MetricStoreHandle = nil\n   357→\t\tcclog.Debug(\"missing internal metricstore configuration\")\n   358→\t}\n   359→\n   360→\t// Initialize external metric stores if configuration is provided\n   361→\tmscfg = ccconf.GetPackageConfig(\"metric-store-external\")\n   362→\tif mscfg != nil {\n   363→\t\terr := metricdispatch.Init(mscfg)\n   364→\n   365→\t\tif err != nil {\n   366→\t\t\tcclog.Debugf(\"error while initializing external metricdispatch: %v\", err)\n   367→\t\t} else {\n   368→\t\t\thaveMetricstore = true\n   369→\t\t}\n   370→\t}\n   371→\n   372→\tif !haveMetricstore {\n   373→\t\treturn fmt.Errorf(\"missing metricstore configuration\")\n   374→\t}\n   375→\n   376→\t// Start archiver and task manager\n   377→\tarchiver.Start(repository.GetJobRepository(), ctx)\n   378→\ttaskmanager.Start(ccconf.GetPackageConfig(\"cron\"), ccconf.GetPackageConfig(\"archive\"))\n   379→\n   380→\t// Initialize web UI\n   381→\tcfg := ccconf.GetPackageConfig(\"ui\")\n   382→\tif err := web.Init(cfg); err != nil {\n   383→\t\treturn fmt.Errorf(\"initializing web UI: %w\", err)\n   384→\t}\n   385→\n   386→\t// Initialize HTTP server\n   387→\tsrv, err := NewServer(version, commit, date)\n   388→\tif err != nil {\n   389→\t\treturn fmt.Errorf(\"creating server: %w\", err)\n   390→\t}\n   391→\n   392→\t// Channel to collect errors from server\n   393→\terrChan := make(chan error, 1)\n   394→\n   395→\t// Start HTTP server\n   396→\twg.Go(func() {\n   397→\t\tif err := srv.Start(ctx); err != nil {\n   398→\t\t\terrChan <- err\n   399→\t\t}\n   400→\t})\n   401→\n   402→\t// Handle shutdown signals\n   403→\twg.Add(1)\n   404→\tsigs := make(chan os.Signal, 1)\n   405→\tsignal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)\n   406→\tgo func() {\n   407→\t\tdefer wg.Done()\n   408→\t\tselect {\n   409→\t\tcase <-sigs:\n   410→\t\t\tcclog.Info(\"Shutdown signal received\")\n   411→\t\tcase <-ctx.Done():\n   412→\t\t}\n   413→\n   414→\t\truntime.SystemdNotify(false, \"Shutting down ...\")\n   415→\t\tsrv.Shutdown(ctx)\n   416→\t\tutil.FsWatcherShutdown()\n   417→\t\ttaskmanager.Shutdown()\n   418→\t}()\n   419→\n   420→\t// Set GC percent if not configured\n   421→\tif os.Getenv(envGOGC) == \"\" {\n   422→\t\t// trigger GC when heap grows 15% above the previous live set\n   423→\t\tdebug.SetGCPercent(15)\n   424→\t}\n   425→\truntime.SystemdNotify(true, \"running\")\n   426→\n   427→\twaitDone := make(chan struct{})\n   428→\tgo func() {\n   429→\t\twg.Wait()\n   430→\t\tclose(waitDone)\n   431→\t}()\n   432→\n   433→\tgo func() {\n   434→\t\t<-waitDone\n   435→\t\tclose(errChan)\n   436→\t}()\n   437→\n   438→\t// Wait for either:\n   439→\t// 1. An error from server startup\n   440→\t// 2. Completion of all goroutines (normal shutdown or crash)\n   441→\tselect {\n   442→\tcase err := <-errChan:\n   443→\t\t// errChan will be closed when waitDone is closed, which happens\n   444→\t\t// when all goroutines complete (either from normal shutdown or error)\n   445→\t\tif err != nil {\n   446→\t\t\treturn err\n   447→\t\t}\n   448→\tcase <-time.After(100 * time.Millisecond):\n   449→\t\t// Give the server 100ms to start and report any immediate startup errors\n   450→\t\t// After that, just wait for normal shutdown completion\n   451→\t\tselect {\n   452→\t\tcase err := <-errChan:\n   453→\t\t\tif err != nil {\n   454→\t\t\t\treturn err\n   455→\t\t\t}\n   456→\t\tcase <-waitDone:\n   457→\t\t\t// Normal shutdown completed\n   458→\t\t}\n   459→\t}\n   460→\n   461→\tcclog.Print(\"Graceful shutdown completed!\")\n   462→\treturn nil\n   463→}\n   464→\n   465→func run() error {\n   466→\tcliInit()\n   467→\n   468→\tif flagVersion {\n   469→\t\tprintVersion()\n   470→\t\treturn nil\n   471→\t}\n   472→\n   473→\t// Initialize logger\n   474→\tcclog.Init(flagLogLevel, flagLogDateTime)\n   475→\n   476→\t// Handle init flag\n   477→\tif flagInit {\n   478→\t\tinitEnv()\n   479→\t\tcclog.Exit(\"Successfully setup environment!\\n\" +\n   480→\t\t\t\"Please review config.json and .env and adjust it to your needs.\\n\" +\n   481→\t\t\t\"Add your job-archive at ./var/job-archive.\")\n   482→\t}\n   483→\n   484→\t// Initialize gops agent\n   485→\tif err := initGops(); err != nil {\n   486→\t\treturn err\n   487→\t}\n   488→\n   489→\t// Initialize subsystems in dependency order:\n   490→\t// 1. Load environment variables from .env file (contains sensitive configuration)\n   491→\t// 2. Load configuration from config.json (may reference environment variables)\n   492→\t// 3. Handle database migration commands if requested\n   493→\t// 4. Initialize database connection (requires config for connection string)\n   494→\t// 5. Handle user commands if requested (requires database and authentication config)\n   495→\t// 6. Initialize subsystems like archive and metrics (require config and database)\n   496→\n   497→\t// Load environment and configuration\n   498→\tif err := loadEnvironment(); err != nil {\n   499→\t\treturn err\n   500→\t}\n   501→\n   502→\tif err := initConfiguration(); err != nil {\n   503→\t\treturn err\n   504→\t}\n   505→\n   506→\t// Handle database migration (migrate, revert, force)\n   507→\tif err := handleDatabaseCommands(); err != nil {\n   508→\t\treturn err\n   509→\t}\n   510→\n   511→\t// Initialize database\n   512→\tif err := initDatabase(); err != nil {\n   513→\t\treturn err\n   514→\t}\n   515→\n   516→\t// Optimize database if requested\n   517→\tif flagOptimizeDB {\n   518→\t\tdb := repository.GetConnection()\n   519→\t\tcclog.Print(\"Running VACUUM to reclaim space and defragment database...\")\n   520→\t\tif _, err := db.DB.Exec(\"VACUUM\"); err != nil {\n   521→\t\t\treturn fmt.Errorf(\"VACUUM failed: %w\", err)\n   522→\t\t}\n   523→\t\tcclog.Print(\"Running ANALYZE to update query planner statistics...\")\n   524→\t\tif _, err := db.DB.Exec(\"ANALYZE\"); err != nil {\n   525→\t\t\treturn fmt.Errorf(\"ANALYZE failed: %w\", err)\n   526→\t\t}\n   527→\t\tcclog.Exitf(\"OptimizeDB Success: Database '%s' optimized (VACUUM + ANALYZE).\\n\", config.Keys.DB)\n   528→\t}\n   529→\n   530→\t// Handle user commands (add, delete, sync, JWT)\n   531→\tif err := handleUserCommands(); err != nil {\n   532→\t\treturn err\n   533→\t}\n   534→\n   535→\t// Initialize subsystems (archive, metrics, taggers)\n   536→\tif err := initSubsystems(); err != nil {\n   537→\t\treturn err\n   538→\t}\n   539→\n   540→\t// Handle checkpoint cleanup\n   541→\tif flagCleanupCheckpoints {\n   542→\t\tmscfg := ccconf.GetPackageConfig(\"metric-store\")\n   543→\t\tif mscfg == nil {\n   544→\t\t\treturn fmt.Errorf(\"metric-store configuration required for checkpoint cleanup\")\n   545→\t\t}\n   546→\t\tif err := json.Unmarshal(mscfg, &metricstore.Keys); err != nil {\n   547→\t\t\treturn fmt.Errorf(\"decoding metric-store config: %w\", err)\n   548→\t\t}\n   549→\t\tif metricstore.Keys.NumWorkers <= 0 {\n   550→\t\t\tmetricstore.Keys.NumWorkers = min(goruntime.NumCPU()/2+1, metricstore.DefaultMaxWorkers)\n   551→\t\t}\n   552→\n   553→\t\td, err := time.ParseDuration(metricstore.Keys.RetentionInMemory)\n   554→\t\tif err != nil {\n   555→\t\t\treturn fmt.Errorf(\"parsing retention-in-memory: %w\", err)\n   556→\t\t}\n   557→\t\tfrom := time.Now().Add(-d)\n   558→\t\tdeleteMode := metricstore.Keys.Cleanup == nil || metricstore.Keys.Cleanup.Mode != \"archive\"\n   559→\t\tcleanupDir := \"\"\n   560→\t\tif !deleteMode {\n   561→\t\t\tcleanupDir = metricstore.Keys.Cleanup.RootDir\n   562→\t\t}\n   563→\n   564→\t\tcclog.Infof(\"Cleaning up checkpoints older than %s...\", from.Format(time.RFC3339))\n   565→\t\tn, err := metricstore.CleanupCheckpoints(\n   566→\t\t\tmetricstore.Keys.Checkpoints.RootDir, cleanupDir, from.Unix(), deleteMode)\n   567→\t\tif err != nil {\n   568→\t\t\treturn fmt.Errorf(\"checkpoint cleanup: %w\", err)\n   569→\t\t}\n   570→\t\tif deleteMode {\n   571→\t\t\tcclog.Exitf(\"Cleanup done: %d checkpoint files deleted.\", n)\n   572→\t\t} else {\n   573→\t\t\tcclog.Exitf(\"Cleanup done: %d checkpoint files archived to parquet.\", n)\n   574→\t\t}\n   575→\t}\n   576→\n   577→\t// Exit if start server is not requested\n   578→\tif !flagServer {\n   579→\t\tcclog.Exit(\"No errors, server flag not set. Exiting cc-backend.\")\n   580→\t}\n   581→\n   582→\t// Run server with context\n   583→\tctx, cancel := context.WithCancel(context.Background())\n   584→\tdefer cancel()\n   585→\n   586→\treturn runServer(ctx)\n   587→}\n   588→\n   589→func main() {\n   590→\tif err := run(); err != nil {\n   591→\t\tcclog.Error(err.Error())\n   592→\t\tos.Exit(1)\n   593→\t}\n   594→}\n   595→"}]},"uuid":"2759296f-9f15-4695-9ac4-2cf9b0a1a37e","timestamp":"2026-03-24T06:09:53.524Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"9a06b60d-fb19-48cc-81f3-3a76ff1a2292","timestamp":"2026-03-24T06:09:53.742Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"9a06b60d-fb19-48cc-81f3-3a76ff1a2292","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_016u5mERZenFFzcxpKtBtdTu","type":"tool_result","content":"     1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n     2→// All rights reserved. This file is part of cc-backend.\n     3→// Use of this source code is governed by a MIT-style\n     4→// license that can be found in the LICENSE file.\n     5→\n     6→// Package main provides the entry point for the ClusterCockpit backend server.\n     7→// This file contains HTTP server setup, routing configuration, and\n     8→// authentication middleware integration.\n     9→package main\n    10→\n    11→import (\n    12→\t\"context\"\n    13→\t\"crypto/tls\"\n    14→\t\"encoding/json\"\n    15→\t\"errors\"\n    16→\t\"fmt\"\n    17→\t\"net\"\n    18→\t\"net/http\"\n    19→\t\"os\"\n    20→\t\"strings\"\n    21→\t\"time\"\n    22→\n    23→\t\"github.com/99designs/gqlgen/graphql\"\n    24→\t\"github.com/99designs/gqlgen/graphql/handler\"\n    25→\t\"github.com/99designs/gqlgen/graphql/handler/transport\"\n    26→\t\"github.com/99designs/gqlgen/graphql/playground\"\n    27→\t\"github.com/ClusterCockpit/cc-backend/internal/api\"\n    28→\t\"github.com/ClusterCockpit/cc-backend/internal/archiver\"\n    29→\t\"github.com/ClusterCockpit/cc-backend/internal/auth\"\n    30→\t\"github.com/ClusterCockpit/cc-backend/internal/config\"\n    31→\t\"github.com/ClusterCockpit/cc-backend/internal/graph\"\n    32→\t\"github.com/ClusterCockpit/cc-backend/internal/graph/generated\"\n    33→\t\"github.com/ClusterCockpit/cc-backend/internal/routerConfig\"\n    34→\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n    35→\t\"github.com/ClusterCockpit/cc-backend/web\"\n    36→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n    37→\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n    38→\t\"github.com/ClusterCockpit/cc-lib/v2/runtime\"\n    39→\t\"github.com/go-chi/chi/v5\"\n    40→\t\"github.com/go-chi/chi/v5/middleware\"\n    41→\t\"github.com/go-chi/cors\"\n    42→\thttpSwagger \"github.com/swaggo/http-swagger\"\n    43→)\n    44→\n    45→var buildInfo web.Build\n    46→\n    47→// Environment variable names\n    48→const (\n    49→\tenvDebug = \"DEBUG\"\n    50→)\n    51→\n    52→// Server encapsulates the HTTP server state and dependencies\n    53→type Server struct {\n    54→\trouter        chi.Router\n    55→\tserver        *http.Server\n    56→\trestAPIHandle *api.RestAPI\n    57→\tnatsAPIHandle *api.NatsAPI\n    58→}\n    59→\n    60→func onFailureResponse(rw http.ResponseWriter, r *http.Request, err error) {\n    61→\trw.Header().Add(\"Content-Type\", \"application/json\")\n    62→\trw.WriteHeader(http.StatusUnauthorized)\n    63→\tjson.NewEncoder(rw).Encode(map[string]string{\n    64→\t\t\"status\": http.StatusText(http.StatusUnauthorized),\n    65→\t\t\"error\":  err.Error(),\n    66→\t})\n    67→}\n    68→\n    69→// NewServer creates and initializes a new Server instance\n    70→func NewServer(version, commit, buildDate string) (*Server, error) {\n    71→\tbuildInfo = web.Build{Version: version, Hash: commit, Buildtime: buildDate}\n    72→\n    73→\ts := &Server{\n    74→\t\trouter: chi.NewRouter(),\n    75→\t}\n    76→\n    77→\tif err := s.init(); err != nil {\n    78→\t\treturn nil, err\n    79→\t}\n    80→\n    81→\treturn s, nil\n    82→}\n    83→\n    84→func (s *Server) init() error {\n    85→\t// Setup the http.Handler/Router used by the server\n    86→\tgraph.Init()\n    87→\tresolver := graph.GetResolverInstance()\n    88→\tgraphQLServer := handler.New(\n    89→\t\tgenerated.NewExecutableSchema(generated.Config{Resolvers: resolver}))\n    90→\n    91→\tgraphQLServer.AddTransport(transport.POST{})\n    92→\n    93→\t// Inject a per-request stats cache so that grouped statistics queries\n    94→\t// sharing the same (filter, groupBy) pair are executed only once.\n    95→\tgraphQLServer.AroundOperations(func(ctx context.Context, next graphql.OperationHandler) graphql.ResponseHandler {\n    96→\t\treturn next(graph.WithStatsGroupCache(ctx))\n    97→\t})\n    98→\n    99→\tif os.Getenv(envDebug) != \"1\" {\n   100→\t\t// Having this handler means that a error message is returned via GraphQL instead of the connection simply beeing closed.\n   101→\t\t// The problem with this is that then, no more stacktrace is printed to stderr.\n   102→\t\tgraphQLServer.SetRecoverFunc(func(ctx context.Context, err any) error {\n   103→\t\t\tswitch e := err.(type) {\n   104→\t\t\tcase string:\n   105→\t\t\t\treturn fmt.Errorf(\"MAIN > Panic: %s\", e)\n   106→\t\t\tcase error:\n   107→\t\t\t\treturn fmt.Errorf(\"MAIN > Panic caused by: %s\", e.Error())\n   108→\t\t\t}\n   109→\n   110→\t\t\treturn errors.New(\"MAIN > Internal server error (panic)\")\n   111→\t\t})\n   112→\t}\n   113→\n   114→\tauthHandle := auth.GetAuthInstance()\n   115→\n   116→\t// Middleware must be defined before routes in chi\n   117→\ts.router.Use(func(next http.Handler) http.Handler {\n   118→\t\treturn http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {\n   119→\t\t\tstart := time.Now()\n   120→\t\t\tww := middleware.NewWrapResponseWriter(rw, r.ProtoMajor)\n   121→\t\t\tnext.ServeHTTP(ww, r)\n   122→\t\t\tcclog.Debugf(\"%s %s (%d, %.02fkb, %dms)\",\n   123→\t\t\t\tr.Method, r.URL.RequestURI(),\n   124→\t\t\t\tww.Status(), float32(ww.BytesWritten())/1024,\n   125→\t\t\t\ttime.Since(start).Milliseconds())\n   126→\t\t})\n   127→\t})\n   128→\ts.router.Use(middleware.Compress(5))\n   129→\ts.router.Use(middleware.Recoverer)\n   130→\ts.router.Use(cors.Handler(cors.Options{\n   131→\t\tAllowCredentials: true,\n   132→\t\tAllowedHeaders:   []string{\"X-Requested-With\", \"Content-Type\", \"Authorization\", \"Origin\"},\n   133→\t\tAllowedMethods:   []string{\"GET\", \"POST\", \"HEAD\", \"OPTIONS\"},\n   134→\t\tAllowedOrigins:   []string{\"*\"},\n   135→\t}))\n   136→\n   137→\ts.restAPIHandle = api.New()\n   138→\n   139→\tinfo := map[string]any{}\n   140→\tinfo[\"hasOpenIDConnect\"] = false\n   141→\n   142→\tif auth.Keys.OpenIDConfig != nil {\n   143→\t\topenIDConnect := auth.NewOIDC(authHandle)\n   144→\t\topenIDConnect.RegisterEndpoints(s.router)\n   145→\t\tinfo[\"hasOpenIDConnect\"] = true\n   146→\t}\n   147→\n   148→\ts.router.Get(\"/login\", func(rw http.ResponseWriter, r *http.Request) {\n   149→\t\trw.Header().Add(\"Content-Type\", \"text/html; charset=utf-8\")\n   150→\t\tcclog.Debugf(\"##%v##\", info)\n   151→\t\tweb.RenderTemplate(rw, \"login.tmpl\", &web.Page{Title: \"Login\", Build: buildInfo, Infos: info})\n   152→\t})\n   153→\ts.router.HandleFunc(\"/imprint\", func(rw http.ResponseWriter, r *http.Request) {\n   154→\t\trw.Header().Add(\"Content-Type\", \"text/html; charset=utf-8\")\n   155→\t\tweb.RenderTemplate(rw, \"imprint.tmpl\", &web.Page{Title: \"Imprint\", Build: buildInfo})\n   156→\t})\n   157→\ts.router.HandleFunc(\"/privacy\", func(rw http.ResponseWriter, r *http.Request) {\n   158→\t\trw.Header().Add(\"Content-Type\", \"text/html; charset=utf-8\")\n   159→\t\tweb.RenderTemplate(rw, \"privacy.tmpl\", &web.Page{Title: \"Privacy\", Build: buildInfo})\n   160→\t})\n   161→\n   162→\tif !config.Keys.DisableAuthentication {\n   163→\t\t// Create login failure handler (used by both /login and /jwt-login)\n   164→\t\tloginFailureHandler := func(rw http.ResponseWriter, r *http.Request, err error) {\n   165→\t\t\trw.Header().Add(\"Content-Type\", \"text/html; charset=utf-8\")\n   166→\t\t\trw.WriteHeader(http.StatusUnauthorized)\n   167→\t\t\tweb.RenderTemplate(rw, \"login.tmpl\", &web.Page{\n   168→\t\t\t\tTitle:   \"Login failed - ClusterCockpit\",\n   169→\t\t\t\tMsgType: \"alert-warning\",\n   170→\t\t\t\tMessage: err.Error(),\n   171→\t\t\t\tBuild:   buildInfo,\n   172→\t\t\t\tInfos:   info,\n   173→\t\t\t})\n   174→\t\t}\n   175→\n   176→\t\ts.router.Post(\"/login\", authHandle.Login(loginFailureHandler).ServeHTTP)\n   177→\t\ts.router.HandleFunc(\"/jwt-login\", authHandle.Login(loginFailureHandler).ServeHTTP)\n   178→\n   179→\t\ts.router.Post(\"/logout\", authHandle.Logout(\n   180→\t\t\thttp.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {\n   181→\t\t\t\trw.Header().Add(\"Content-Type\", \"text/html; charset=utf-8\")\n   182→\t\t\t\trw.WriteHeader(http.StatusOK)\n   183→\t\t\t\tweb.RenderTemplate(rw, \"login.tmpl\", &web.Page{\n   184→\t\t\t\t\tTitle:   \"Bye - ClusterCockpit\",\n   185→\t\t\t\t\tMsgType: \"alert-info\",\n   186→\t\t\t\t\tMessage: \"Logout successful\",\n   187→\t\t\t\t\tBuild:   buildInfo,\n   188→\t\t\t\t\tInfos:   info,\n   189→\t\t\t\t})\n   190→\t\t\t})).ServeHTTP)\n   191→\t}\n   192→\n   193→\tif flagDev {\n   194→\t\ts.router.Handle(\"/playground\", playground.Handler(\"GraphQL playground\", \"/query\"))\n   195→\t\ts.router.Get(\"/swagger/*\", httpSwagger.Handler(\n   196→\t\t\thttpSwagger.URL(\"http://\"+config.Keys.Addr+\"/swagger/doc.json\")))\n   197→\t}\n   198→\n   199→\t// Secured routes (require authentication)\n   200→\ts.router.Group(func(secured chi.Router) {\n   201→\t\tif !config.Keys.DisableAuthentication {\n   202→\t\t\tsecured.Use(func(next http.Handler) http.Handler {\n   203→\t\t\t\treturn authHandle.Auth(\n   204→\t\t\t\t\tnext,\n   205→\t\t\t\t\tfunc(rw http.ResponseWriter, r *http.Request, err error) {\n   206→\t\t\t\t\t\trw.WriteHeader(http.StatusUnauthorized)\n   207→\t\t\t\t\t\tweb.RenderTemplate(rw, \"login.tmpl\", &web.Page{\n   208→\t\t\t\t\t\t\tTitle:    \"Authentication failed - ClusterCockpit\",\n   209→\t\t\t\t\t\t\tMsgType:  \"alert-danger\",\n   210→\t\t\t\t\t\t\tMessage:  err.Error(),\n   211→\t\t\t\t\t\t\tBuild:    buildInfo,\n   212→\t\t\t\t\t\t\tInfos:    info,\n   213→\t\t\t\t\t\t\tRedirect: r.RequestURI,\n   214→\t\t\t\t\t\t})\n   215→\t\t\t\t\t})\n   216→\t\t\t})\n   217→\t\t}\n   218→\n   219→\t\tsecured.Handle(\"/query\", graphQLServer)\n   220→\n   221→\t\tsecured.HandleFunc(\"/search\", func(rw http.ResponseWriter, r *http.Request) {\n   222→\t\t\trouterConfig.HandleSearchBar(rw, r, buildInfo)\n   223→\t\t})\n   224→\n   225→\t\trouterConfig.SetupRoutes(secured, buildInfo)\n   226→\t})\n   227→\n   228→\t// API routes (JWT token auth)\n   229→\ts.router.Route(\"/api\", func(apiRouter chi.Router) {\n   230→\t\t// Main API routes with API auth\n   231→\t\tapiRouter.Group(func(securedapi chi.Router) {\n   232→\t\t\tif !config.Keys.DisableAuthentication {\n   233→\t\t\t\tsecuredapi.Use(func(next http.Handler) http.Handler {\n   234→\t\t\t\t\treturn authHandle.AuthAPI(next, onFailureResponse)\n   235→\t\t\t\t})\n   236→\t\t\t}\n   237→\t\t\ts.restAPIHandle.MountAPIRoutes(securedapi)\n   238→\t\t})\n   239→\n   240→\t\t// Metric store API routes with separate auth\n   241→\t\tapiRouter.Group(func(metricstoreapi chi.Router) {\n   242→\t\t\tif !config.Keys.DisableAuthentication {\n   243→\t\t\t\tmetricstoreapi.Use(func(next http.Handler) http.Handler {\n   244→\t\t\t\t\treturn authHandle.AuthMetricStoreAPI(next, onFailureResponse)\n   245→\t\t\t\t})\n   246→\t\t\t}\n   247→\t\t\ts.restAPIHandle.MountMetricStoreAPIRoutes(metricstoreapi)\n   248→\t\t})\n   249→\t})\n   250→\n   251→\t// User API routes\n   252→\ts.router.Route(\"/userapi\", func(userapi chi.Router) {\n   253→\t\tif !config.Keys.DisableAuthentication {\n   254→\t\t\tuserapi.Use(func(next http.Handler) http.Handler {\n   255→\t\t\t\treturn authHandle.AuthUserAPI(next, onFailureResponse)\n   256→\t\t\t})\n   257→\t\t}\n   258→\t\ts.restAPIHandle.MountUserAPIRoutes(userapi)\n   259→\t})\n   260→\n   261→\t// Config API routes (uses Group with full paths to avoid shadowing\n   262→\t// the /config page route that is registered in the secured group)\n   263→\ts.router.Group(func(configapi chi.Router) {\n   264→\t\tif !config.Keys.DisableAuthentication {\n   265→\t\t\tconfigapi.Use(func(next http.Handler) http.Handler {\n   266→\t\t\t\treturn authHandle.AuthConfigAPI(next, onFailureResponse)\n   267→\t\t\t})\n   268→\t\t}\n   269→\t\ts.restAPIHandle.MountConfigAPIRoutes(configapi)\n   270→\t})\n   271→\n   272→\t// Frontend API routes\n   273→\ts.router.Route(\"/frontend\", func(frontendapi chi.Router) {\n   274→\t\tif !config.Keys.DisableAuthentication {\n   275→\t\t\tfrontendapi.Use(func(next http.Handler) http.Handler {\n   276→\t\t\t\treturn authHandle.AuthFrontendAPI(next, onFailureResponse)\n   277→\t\t\t})\n   278→\t\t}\n   279→\t\ts.restAPIHandle.MountFrontendAPIRoutes(frontendapi)\n   280→\t})\n   281→\n   282→\tif config.Keys.APISubjects != nil {\n   283→\t\ts.natsAPIHandle = api.NewNatsAPI()\n   284→\t\tif err := s.natsAPIHandle.StartSubscriptions(); err != nil {\n   285→\t\t\treturn fmt.Errorf(\"starting NATS subscriptions: %w\", err)\n   286→\t\t}\n   287→\t}\n   288→\n   289→\t// 404 handler for pages and API routes\n   290→\tnotFoundHandler := func(rw http.ResponseWriter, r *http.Request) {\n   291→\t\tif strings.HasPrefix(r.URL.Path, \"/api/\") || strings.HasPrefix(r.URL.Path, \"/userapi/\") ||\n   292→\t\t\tstrings.HasPrefix(r.URL.Path, \"/frontend/\") || strings.HasPrefix(r.URL.Path, \"/config/\") {\n   293→\t\t\trw.Header().Set(\"Content-Type\", \"application/json\")\n   294→\t\t\trw.WriteHeader(http.StatusNotFound)\n   295→\t\t\tjson.NewEncoder(rw).Encode(map[string]string{\n   296→\t\t\t\t\"status\": \"Resource not found\",\n   297→\t\t\t\t\"error\":  \"the requested endpoint does not exist\",\n   298→\t\t\t})\n   299→\t\t\treturn\n   300→\t\t}\n   301→\t\trw.Header().Set(\"Content-Type\", \"text/html; charset=utf-8\")\n   302→\t\trw.WriteHeader(http.StatusNotFound)\n   303→\t\tweb.RenderTemplate(rw, \"404.tmpl\", &web.Page{\n   304→\t\t\tTitle: \"Page Not Found\",\n   305→\t\t\tBuild: buildInfo,\n   306→\t\t})\n   307→\t}\n   308→\n   309→\t// Set NotFound on the router so chi uses it for all unmatched routes,\n   310→\t// including those under subrouters like /api, /userapi, /frontend, etc.\n   311→\ts.router.NotFound(notFoundHandler)\n   312→\n   313→\tif config.Keys.EmbedStaticFiles {\n   314→\t\tif i, err := os.Stat(\"./var/img\"); err == nil {\n   315→\t\t\tif i.IsDir() {\n   316→\t\t\t\tcclog.Info(\"Use local directory for static images\")\n   317→\t\t\t\ts.router.Handle(\"/img/*\", http.StripPrefix(\"/img/\", http.FileServer(http.Dir(\"./var/img\"))))\n   318→\t\t\t}\n   319→\t\t}\n   320→\t\tfileServer := http.StripPrefix(\"/\", web.ServeFiles())\n   321→\t\ts.router.Handle(\"/*\", http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {\n   322→\t\t\tif web.StaticFileExists(r.URL.Path) {\n   323→\t\t\t\tfileServer.ServeHTTP(rw, r)\n   324→\t\t\t\treturn\n   325→\t\t\t}\n   326→\t\t\tnotFoundHandler(rw, r)\n   327→\t\t}))\n   328→\t} else {\n   329→\t\tstaticDir := http.Dir(config.Keys.StaticFiles)\n   330→\t\tfileServer := http.FileServer(staticDir)\n   331→\t\ts.router.Handle(\"/*\", http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {\n   332→\t\t\tf, err := staticDir.Open(r.URL.Path)\n   333→\t\t\tif err == nil {\n   334→\t\t\t\tf.Close()\n   335→\t\t\t\tfileServer.ServeHTTP(rw, r)\n   336→\t\t\t\treturn\n   337→\t\t\t}\n   338→\t\t\tnotFoundHandler(rw, r)\n   339→\t\t}))\n   340→\t}\n   341→\n   342→\treturn nil\n   343→}\n   344→\n   345→// Server timeout defaults (in seconds)\n   346→const (\n   347→\tdefaultReadHeaderTimeout = 20\n   348→\tdefaultWriteTimeout      = 20\n   349→)\n   350→\n   351→func (s *Server) Start(ctx context.Context) error {\n   352→\t// Use configurable timeouts with defaults\n   353→\treadHeaderTimeout := time.Duration(defaultReadHeaderTimeout) * time.Second\n   354→\twriteTimeout := time.Duration(defaultWriteTimeout) * time.Second\n   355→\n   356→\ts.server = &http.Server{\n   357→\t\tReadHeaderTimeout: readHeaderTimeout,\n   358→\t\tWriteTimeout:      writeTimeout,\n   359→\t\tHandler:      s.router,\n   360→\t\tAddr:         config.Keys.Addr,\n   361→\t}\n   362→\n   363→\t// Start http or https server\n   364→\tlistener, err := net.Listen(\"tcp\", config.Keys.Addr)\n   365→\tif err != nil {\n   366→\t\treturn fmt.Errorf(\"starting listener on '%s': %w\", config.Keys.Addr, err)\n   367→\t}\n   368→\n   369→\tif !strings.HasSuffix(config.Keys.Addr, \":80\") && config.Keys.RedirectHTTPTo != \"\" {\n   370→\t\tgo func() {\n   371→\t\t\thttp.ListenAndServe(\":80\", http.RedirectHandler(config.Keys.RedirectHTTPTo, http.StatusMovedPermanently))\n   372→\t\t}()\n   373→\t}\n   374→\n   375→\tif config.Keys.HTTPSCertFile != \"\" && config.Keys.HTTPSKeyFile != \"\" {\n   376→\t\tcert, err := tls.LoadX509KeyPair(\n   377→\t\t\tconfig.Keys.HTTPSCertFile, config.Keys.HTTPSKeyFile)\n   378→\t\tif err != nil {\n   379→\t\t\treturn fmt.Errorf(\"loading X509 keypair (check 'https-cert-file' and 'https-key-file' in config.json): %w\", err)\n   380→\t\t}\n   381→\t\tlistener = tls.NewListener(listener, &tls.Config{\n   382→\t\t\tCertificates: []tls.Certificate{cert},\n   383→\t\t\tCipherSuites: []uint16{\n   384→\t\t\t\ttls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,\n   385→\t\t\t\ttls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,\n   386→\t\t\t},\n   387→\t\t\tMinVersion:               tls.VersionTLS12,\n   388→\t\t\tPreferServerCipherSuites: true,\n   389→\t\t})\n   390→\t\tcclog.Infof(\"HTTPS server listening at %s...\", config.Keys.Addr)\n   391→\t} else {\n   392→\t\tcclog.Infof(\"HTTP server listening at %s...\", config.Keys.Addr)\n   393→\t}\n   394→\t//\n   395→\t// Because this program will want to bind to a privileged port (like 80), the listener must\n   396→\t// be established first, then the user can be changed, and after that,\n   397→\t// the actual http server can be started.\n   398→\tif err := runtime.DropPrivileges(config.Keys.Group, config.Keys.User); err != nil {\n   399→\t\treturn fmt.Errorf(\"dropping privileges: %w\", err)\n   400→\t}\n   401→\n   402→\t// Handle context cancellation for graceful shutdown\n   403→\tgo func() {\n   404→\t\t<-ctx.Done()\n   405→\t\tshutdownCtx, cancel := context.WithTimeout(context.Background(), 30*time.Second)\n   406→\t\tdefer cancel()\n   407→\t\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n   408→\t\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n   409→\t\t}\n   410→\t}()\n   411→\n   412→\tif err = s.server.Serve(listener); err != nil && err != http.ErrServerClosed {\n   413→\t\treturn fmt.Errorf(\"server failed: %w\", err)\n   414→\t}\n   415→\treturn nil\n   416→}\n   417→\n   418→func (s *Server) Shutdown(ctx context.Context) {\n   419→\t// Create a shutdown context with timeout\n   420→\tshutdownCtx, cancel := context.WithTimeout(ctx, 30*time.Second)\n   421→\tdefer cancel()\n   422→\n   423→\tnc := nats.GetClient()\n   424→\tif nc != nil {\n   425→\t\tnc.Close()\n   426→\t}\n   427→\n   428→\t// First shut down the server gracefully (waiting for all ongoing requests)\n   429→\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n   430→\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n   431→\t}\n   432→\n   433→\t// Archive all the metric store data\n   434→\tms := metricstore.GetMemoryStore()\n   435→\n   436→\tif ms != nil {\n   437→\t\tmetricstore.Shutdown()\n   438→\t}\n   439→\n   440→\t// Shutdown archiver with 10 second timeout for fast shutdown\n   441→\tif err := archiver.Shutdown(10 * time.Second); err != nil {\n   442→\t\tcclog.Warnf(\"Archiver shutdown: %v\", err)\n   443→\t}\n   444→}\n   445→"}]},"uuid":"dd056b27-f1d2-4179-9cdf-8aaae07519d0","timestamp":"2026-03-24T06:09:53.738Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"a6a371d7-a82c-40db-a40b-2e60072655e4","timestamp":"2026-03-24T06:09:53.742Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"a6a371d7-a82c-40db-a40b-2e60072655e4","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:09:53.777Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01AFSzUehf5um2UFhFrjvd1K","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01Lm2WTjShfoVngNUEhieifA","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/api/nats.go"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":6,"cache_creation_input_tokens":1490,"cache_read_input_tokens":18760,"cache_creation":{"ephemeral_5m_input_tokens":1490,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQb6yBJjiSbkD9Ka5yW","uuid":"d5edc656-98db-454f-ab0e-dd1ac333a5b7"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"bb2ed477-8050-45ca-a7bf-6d5aaf06cd97","timestamp":"2026-03-24T06:09:53.777Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"bb2ed477-8050-45ca-a7bf-6d5aaf06cd97","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01Lm2WTjShfoVngNUEhieifA","type":"tool_result","content":"     1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n     2→// All rights reserved. This file is part of cc-backend.\n     3→// Use of this source code is governed by a MIT-style\n     4→// license that can be found in the LICENSE file.\n     5→\n     6→package api\n     7→\n     8→import (\n     9→\t\"database/sql\"\n    10→\t\"encoding/json\"\n    11→\t\"maps\"\n    12→\t\"strings\"\n    13→\t\"sync\"\n    14→\t\"time\"\n    15→\n    16→\t\"github.com/ClusterCockpit/cc-backend/internal/archiver\"\n    17→\t\"github.com/ClusterCockpit/cc-backend/internal/config\"\n    18→\t\"github.com/ClusterCockpit/cc-backend/internal/importer\"\n    19→\t\"github.com/ClusterCockpit/cc-backend/internal/metricdispatch\"\n    20→\t\"github.com/ClusterCockpit/cc-backend/internal/repository\"\n    21→\t\"github.com/ClusterCockpit/cc-backend/pkg/archive\"\n    22→\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n    23→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n    24→\tlp \"github.com/ClusterCockpit/cc-lib/v2/ccMessage\"\n    25→\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n    26→\t\"github.com/ClusterCockpit/cc-lib/v2/receivers\"\n    27→\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n    28→\tinflux \"github.com/ClusterCockpit/cc-line-protocol/v2/lineprotocol\"\n    29→)\n    30→\n    31→// natsMessage wraps a raw NATS message with its subject for channel-based processing.\n    32→type natsMessage struct {\n    33→\tsubject string\n    34→\tdata    []byte\n    35→}\n    36→\n    37→// NatsAPI provides NATS subscription-based handlers for Job and Node operations.\n    38→// It mirrors the functionality of the REST API but uses NATS messaging with\n    39→// InfluxDB line protocol as the message format.\n    40→//\n    41→// # Message Format\n    42→//\n    43→// All NATS messages use InfluxDB line protocol format (https://docs.influxdata.com/influxdb/v2.0/reference/syntax/line-protocol/)\n    44→// with the following structure:\n    45→//\n    46→//\tmeasurement,tag1=value1,tag2=value2 field1=value1,field2=value2 timestamp\n    47→//\n    48→// # Job Events\n    49→//\n    50→// Job start/stop events use the \"job\" measurement with a \"function\" tag to distinguish operations:\n    51→//\n    52→//\tjob,function=start_job event=\"{...JSON payload...}\" <timestamp>\n    53→//\tjob,function=stop_job event=\"{...JSON payload...}\" <timestamp>\n    54→//\n    55→// The JSON payload in the \"event\" field follows the schema.Job or StopJobAPIRequest structure.\n    56→//\n    57→// Example job start message:\n    58→//\n    59→//\tjob,function=start_job event=\"{\\\"jobId\\\":1001,\\\"user\\\":\\\"testuser\\\",\\\"cluster\\\":\\\"testcluster\\\",...}\" 1234567890000000000\n    60→//\n    61→// # Node State Events\n    62→//\n    63→// Node state updates use the \"nodestate\" measurement with cluster information:\n    64→//\n    65→//\tnodestate event=\"{...JSON payload...}\" <timestamp>\n    66→//\n    67→// The JSON payload follows the UpdateNodeStatesRequest structure.\n    68→//\n    69→// Example node state message:\n    70→//\n    71→//\tnodestate event=\"{\\\"cluster\\\":\\\"testcluster\\\",\\\"nodes\\\":[{\\\"hostname\\\":\\\"node01\\\",\\\"states\\\":[\\\"idle\\\"]}]}\" 1234567890000000000\n    72→type NatsAPI struct {\n    73→\tJobRepository *repository.JobRepository\n    74→\t// RepositoryMutex protects job creation operations from race conditions\n    75→\t// when checking for duplicate jobs during startJob calls.\n    76→\tRepositoryMutex sync.Mutex\n    77→\t// jobCh receives job event messages for processing by worker goroutines.\n    78→\tjobCh chan natsMessage\n    79→\t// nodeCh receives node state messages for processing by worker goroutines.\n    80→\tnodeCh chan natsMessage\n    81→}\n    82→\n    83→// NewNatsAPI creates a new NatsAPI instance with channel-based worker pools.\n    84→// Concurrency is configured via NATSConfig (defaults: JobConcurrency=8, NodeConcurrency=2).\n    85→func NewNatsAPI() *NatsAPI {\n    86→\tjobConc := 8\n    87→\tnodeConc := 2\n    88→\n    89→\tif s := config.Keys.APISubjects; s != nil {\n    90→\t\tif s.JobConcurrency > 0 {\n    91→\t\t\tjobConc = s.JobConcurrency\n    92→\t\t}\n    93→\t\tif s.NodeConcurrency > 0 {\n    94→\t\t\tnodeConc = s.NodeConcurrency\n    95→\t\t}\n    96→\t}\n    97→\n    98→\tapi := &NatsAPI{\n    99→\t\tJobRepository: repository.GetJobRepository(),\n   100→\t\tjobCh:         make(chan natsMessage, jobConc),\n   101→\t\tnodeCh:        make(chan natsMessage, nodeConc),\n   102→\t}\n   103→\n   104→\t// Start worker goroutines\n   105→\tfor range jobConc {\n   106→\t\tgo api.jobWorker()\n   107→\t}\n   108→\tfor range nodeConc {\n   109→\t\tgo api.nodeWorker()\n   110→\t}\n   111→\n   112→\treturn api\n   113→}\n   114→\n   115→// jobWorker processes job event messages from the job channel.\n   116→func (api *NatsAPI) jobWorker() {\n   117→\tfor msg := range api.jobCh {\n   118→\t\tapi.handleJobEvent(msg.subject, msg.data)\n   119→\t}\n   120→}\n   121→\n   122→// nodeWorker processes node state messages from the node channel.\n   123→func (api *NatsAPI) nodeWorker() {\n   124→\tfor msg := range api.nodeCh {\n   125→\t\tapi.handleNodeState(msg.subject, msg.data)\n   126→\t}\n   127→}\n   128→\n   129→// StartSubscriptions registers all NATS subscriptions for Job and Node APIs.\n   130→// Messages are delivered to buffered channels and processed by worker goroutines.\n   131→// Returns an error if the NATS client is not available or subscription fails.\n   132→func (api *NatsAPI) StartSubscriptions() error {\n   133→\tclient := nats.GetClient()\n   134→\tif client == nil {\n   135→\t\tcclog.Warn(\"NATS client not available, skipping API subscriptions\")\n   136→\t\treturn nil\n   137→\t}\n   138→\n   139→\tif config.Keys.APISubjects != nil {\n   140→\t\ts := config.Keys.APISubjects\n   141→\n   142→\t\tif err := client.Subscribe(s.SubjectJobEvent, func(subject string, data []byte) {\n   143→\t\t\tapi.jobCh <- natsMessage{subject: subject, data: data}\n   144→\t\t}); err != nil {\n   145→\t\t\treturn err\n   146→\t\t}\n   147→\n   148→\t\tif err := client.Subscribe(s.SubjectNodeState, func(subject string, data []byte) {\n   149→\t\t\tapi.nodeCh <- natsMessage{subject: subject, data: data}\n   150→\t\t}); err != nil {\n   151→\t\t\treturn err\n   152→\t\t}\n   153→\n   154→\t\tcclog.Info(\"NATS API subscriptions started\")\n   155→\t}\n   156→\treturn nil\n   157→}\n   158→\n   159→// processJobEvent routes job event messages to the appropriate handler based on the \"function\" tag.\n   160→// Validates that required tags and fields are present before processing.\n   161→func (api *NatsAPI) processJobEvent(msg lp.CCMessage) {\n   162→\tfunction, ok := msg.GetTag(\"function\")\n   163→\tif !ok {\n   164→\t\tcclog.Errorf(\"Job event is missing required tag 'function': measurement=%s\", msg.Name())\n   165→\t\treturn\n   166→\t}\n   167→\n   168→\tswitch function {\n   169→\tcase \"start_job\":\n   170→\t\tv, ok := msg.GetEventValue()\n   171→\t\tif !ok {\n   172→\t\t\tcclog.Errorf(\"Job start event is missing event field with JSON payload\")\n   173→\t\t\treturn\n   174→\t\t}\n   175→\t\tapi.handleStartJob(v)\n   176→\n   177→\tcase \"stop_job\":\n   178→\t\tv, ok := msg.GetEventValue()\n   179→\t\tif !ok {\n   180→\t\t\tcclog.Errorf(\"Job stop event is missing event field with JSON payload\")\n   181→\t\t\treturn\n   182→\t\t}\n   183→\t\tapi.handleStopJob(v)\n   184→\n   185→\tdefault:\n   186→\t\tcclog.Warnf(\"Unknown job event function '%s', expected 'start_job' or 'stop_job'\", function)\n   187→\t}\n   188→}\n   189→\n   190→// handleJobEvent processes job-related messages received via NATS using InfluxDB line protocol.\n   191→// The message must be in line protocol format with measurement=\"job\" and include:\n   192→//   - tag \"function\" with value \"start_job\" or \"stop_job\"\n   193→//   - field \"event\" containing JSON payload (schema.Job or StopJobAPIRequest)\n   194→//\n   195→// Example: job,function=start_job event=\"{\\\"jobId\\\":1001,...}\" 1234567890000000000\n   196→func (api *NatsAPI) handleJobEvent(subject string, data []byte) {\n   197→\tif len(data) == 0 {\n   198→\t\tcclog.Warnf(\"NATS %s: received empty message\", subject)\n   199→\t\treturn\n   200→\t}\n   201→\n   202→\td := influx.NewDecoderWithBytes(data)\n   203→\n   204→\tfor d.Next() {\n   205→\t\tm, err := receivers.DecodeInfluxMessage(d)\n   206→\t\tif err != nil {\n   207→\t\t\tcclog.Errorf(\"NATS %s: failed to decode InfluxDB line protocol message: %v\", subject, err)\n   208→\t\t\treturn\n   209→\t\t}\n   210→\n   211→\t\tif !m.IsEvent() {\n   212→\t\t\tcclog.Debugf(\"NATS %s: received non-event message, skipping\", subject)\n   213→\t\t\tcontinue\n   214→\t\t}\n   215→\n   216→\t\tif m.Name() == \"job\" {\n   217→\t\t\tapi.processJobEvent(m)\n   218→\t\t} else {\n   219→\t\t\tcclog.Debugf(\"NATS %s: unexpected measurement name '%s', expected 'job'\", subject, m.Name())\n   220→\t\t}\n   221→\t}\n   222→}\n   223→\n   224→// handleStartJob processes job start messages received via NATS.\n   225→// The payload parameter contains JSON following the schema.Job structure.\n   226→// Jobs are validated, checked for duplicates, and inserted into the database.\n   227→func (api *NatsAPI) handleStartJob(payload string) {\n   228→\tif payload == \"\" {\n   229→\t\tcclog.Error(\"NATS start job: payload is empty\")\n   230→\t\treturn\n   231→\t}\n   232→\treq := schema.Job{\n   233→\t\tShared:           \"none\",\n   234→\t\tMonitoringStatus: schema.MonitoringStatusRunningOrArchiving,\n   235→\t}\n   236→\n   237→\tdec := json.NewDecoder(strings.NewReader(payload))\n   238→\tdec.DisallowUnknownFields()\n   239→\tif err := dec.Decode(&req); err != nil {\n   240→\t\tcclog.Errorf(\"NATS start job: parsing request failed: %v\", err)\n   241→\t\treturn\n   242→\t}\n   243→\n   244→\tcclog.Debugf(\"NATS start job: %s\", req.GoString())\n   245→\treq.State = schema.JobStateRunning\n   246→\n   247→\tif err := importer.SanityChecks(&req); err != nil {\n   248→\t\tcclog.Errorf(\"NATS start job: sanity check failed: %v\", err)\n   249→\t\treturn\n   250→\t}\n   251→\n   252→\tvar unlockOnce sync.Once\n   253→\tapi.RepositoryMutex.Lock()\n   254→\tdefer unlockOnce.Do(api.RepositoryMutex.Unlock)\n   255→\n   256→\tjobs, err := api.JobRepository.FindAll(&req.JobID, &req.Cluster, nil)\n   257→\tif err != nil && err != sql.ErrNoRows {\n   258→\t\tcclog.Errorf(\"NATS start job: checking for duplicate failed: %v\", err)\n   259→\t\treturn\n   260→\t}\n   261→\tif err == nil {\n   262→\t\tfor _, job := range jobs {\n   263→\t\t\tif (req.StartTime - job.StartTime) < secondsPerDay {\n   264→\t\t\t\tcclog.Errorf(\"NATS start job: job with jobId %d, cluster %s already exists (dbid: %d)\",\n   265→\t\t\t\t\treq.JobID, req.Cluster, job.ID)\n   266→\t\t\t\treturn\n   267→\t\t\t}\n   268→\t\t}\n   269→\t}\n   270→\n   271→\t// When tags are present, insert directly into the job table so that the\n   272→\t// returned ID can be used with AddTagOrCreate (which queries the job table).\n   273→\tvar id int64\n   274→\tif len(req.Tags) > 0 {\n   275→\t\tid, err = api.JobRepository.StartDirect(&req)\n   276→\t} else {\n   277→\t\tid, err = api.JobRepository.Start(&req)\n   278→\t}\n   279→\tif err != nil {\n   280→\t\tcclog.Errorf(\"NATS start job: insert into database failed: %v\", err)\n   281→\t\treturn\n   282→\t}\n   283→\tunlockOnce.Do(api.RepositoryMutex.Unlock)\n   284→\n   285→\tfor _, tag := range req.Tags {\n   286→\t\tif _, err := api.JobRepository.AddTagOrCreate(nil, id, tag.Type, tag.Name, tag.Scope); err != nil {\n   287→\t\t\tcclog.Errorf(\"NATS start job: adding tag to new job %d failed: %v\", id, err)\n   288→\t\t\treturn\n   289→\t\t}\n   290→\t}\n   291→\n   292→\tcclog.Infof(\"NATS: new job (id: %d): cluster=%s, jobId=%d, user=%s, startTime=%d\",\n   293→\t\tid, req.Cluster, req.JobID, req.User, req.StartTime)\n   294→}\n   295→\n   296→// handleStopJob processes job stop messages received via NATS.\n   297→// The payload parameter contains JSON following the StopJobAPIRequest structure.\n   298→// The job is marked as stopped in the database and archiving is triggered if monitoring is enabled.\n   299→func (api *NatsAPI) handleStopJob(payload string) {\n   300→\tif payload == \"\" {\n   301→\t\tcclog.Error(\"NATS stop job: payload is empty\")\n   302→\t\treturn\n   303→\t}\n   304→\tvar req StopJobAPIRequest\n   305→\n   306→\tdec := json.NewDecoder(strings.NewReader(payload))\n   307→\tdec.DisallowUnknownFields()\n   308→\tif err := dec.Decode(&req); err != nil {\n   309→\t\tcclog.Errorf(\"NATS job stop: parsing request failed: %v\", err)\n   310→\t\treturn\n   311→\t}\n   312→\n   313→\tif req.JobID == nil {\n   314→\t\tcclog.Errorf(\"NATS job stop: the field 'jobId' is required\")\n   315→\t\treturn\n   316→\t}\n   317→\n   318→\tisCached := false\n   319→\tjob, err := api.JobRepository.FindCached(req.JobID, req.Cluster, req.StartTime)\n   320→\tif err != nil {\n   321→\t\t// Not in cache, try main job table\n   322→\t\tjob, err = api.JobRepository.Find(req.JobID, req.Cluster, req.StartTime)\n   323→\t\tif err != nil {\n   324→\t\t\tcclog.Errorf(\"NATS job stop: finding job failed: %v\", err)\n   325→\t\t\treturn\n   326→\t\t}\n   327→\t} else {\n   328→\t\tisCached = true\n   329→\t}\n   330→\n   331→\tif job.State != schema.JobStateRunning {\n   332→\t\tcclog.Errorf(\"NATS job stop: jobId %d (id %d) on %s: job has already been stopped (state is: %s)\",\n   333→\t\t\tjob.JobID, job.ID, job.Cluster, job.State)\n   334→\t\treturn\n   335→\t}\n   336→\n   337→\tif job.StartTime > req.StopTime {\n   338→\t\tcclog.Errorf(\"NATS job stop: jobId %d (id %d) on %s: stopTime %d must be >= startTime %d\",\n   339→\t\t\tjob.JobID, job.ID, job.Cluster, req.StopTime, job.StartTime)\n   340→\t\treturn\n   341→\t}\n   342→\n   343→\tif req.State != \"\" && !req.State.Valid() {\n   344→\t\tcclog.Errorf(\"NATS job stop: jobId %d (id %d) on %s: invalid job state: %#v\",\n   345→\t\t\tjob.JobID, job.ID, job.Cluster, req.State)\n   346→\t\treturn\n   347→\t} else if req.State == \"\" {\n   348→\t\treq.State = schema.JobStateCompleted\n   349→\t}\n   350→\n   351→\tjob.Duration = int32(req.StopTime - job.StartTime)\n   352→\tjob.State = req.State\n   353→\tapi.JobRepository.Mutex.Lock()\n   354→\tdefer api.JobRepository.Mutex.Unlock()\n   355→\n   356→\t// If the job is still in job_cache, transfer it to the job table first\n   357→\tif isCached {\n   358→\t\tnewID, err := api.JobRepository.TransferCachedJobToMain(*job.ID)\n   359→\t\tif err != nil {\n   360→\t\t\tcclog.Errorf(\"NATS job stop: jobId %d (id %d) on %s: transferring cached job failed: %v\",\n   361→\t\t\t\tjob.JobID, *job.ID, job.Cluster, err)\n   362→\t\t\treturn\n   363→\t\t}\n   364→\t\tcclog.Infof(\"NATS: transferred cached job to main table: old id %d -> new id %d (jobId=%d)\", *job.ID, newID, job.JobID)\n   365→\t\tjob.ID = &newID\n   366→\t}\n   367→\n   368→\tif err := api.JobRepository.Stop(*job.ID, job.Duration, job.State, job.MonitoringStatus); err != nil {\n   369→\t\tcclog.Errorf(\"NATS job stop: jobId %d (id %d) on %s: marking job as '%s' failed: %v\",\n   370→\t\t\tjob.JobID, *job.ID, job.Cluster, job.State, err)\n   371→\t\treturn\n   372→\t}\n   373→\n   374→\tcclog.Infof(\"NATS: archiving job (dbid: %d): cluster=%s, jobId=%d, user=%s, startTime=%d, duration=%d, state=%s\",\n   375→\t\t*job.ID, job.Cluster, job.JobID, job.User, job.StartTime, job.Duration, job.State)\n   376→\n   377→\tif job.MonitoringStatus == schema.MonitoringStatusDisabled {\n   378→\t\treturn\n   379→\t}\n   380→\n   381→\tarchiver.TriggerArchiving(job)\n   382→}\n   383→\n   384→// processNodestateEvent extracts and processes node state data from the InfluxDB message.\n   385→// Updates node states in the repository for all nodes in the payload.\n   386→func (api *NatsAPI) processNodestateEvent(msg lp.CCMessage) {\n   387→\tv, ok := msg.GetEventValue()\n   388→\tif !ok {\n   389→\t\tcclog.Errorf(\"Nodestate event is missing event field with JSON payload\")\n   390→\t\treturn\n   391→\t}\n   392→\n   393→\tvar req UpdateNodeStatesRequest\n   394→\n   395→\tdec := json.NewDecoder(strings.NewReader(v))\n   396→\tdec.DisallowUnknownFields()\n   397→\tif err := dec.Decode(&req); err != nil {\n   398→\t\tcclog.Errorf(\"NATS nodestate: parsing request failed: %v\", err)\n   399→\t\treturn\n   400→\t}\n   401→\n   402→\trepo := repository.GetNodeRepository()\n   403→\trequestReceived := time.Now().Unix()\n   404→\n   405→\t// Pre-compute node states; only include non-down nodes in health check\n   406→\tnodeStates := make(map[string]schema.SchedulerState, len(req.Nodes))\n   407→\tfor _, node := range req.Nodes {\n   408→\t\tnodeStates[node.Hostname] = determineState(node.States)\n   409→\t}\n   410→\n   411→\t// Build nodeList per subcluster for health check, skipping down nodes\n   412→\tm := make(map[string][]string)\n   413→\tmetricNames := make(map[string][]string)\n   414→\thealthResults := make(map[string]metricstore.HealthCheckResult)\n   415→\n   416→\tfor _, node := range req.Nodes {\n   417→\t\tif nodeStates[node.Hostname] == schema.NodeStateDown {\n   418→\t\t\tcontinue\n   419→\t\t}\n   420→\t\tif sc, err := archive.GetSubClusterByNode(req.Cluster, node.Hostname); err == nil {\n   421→\t\t\tm[sc] = append(m[sc], node.Hostname)\n   422→\t\t}\n   423→\t}\n   424→\n   425→\tfor sc := range m {\n   426→\t\tif sc != \"\" {\n   427→\t\t\tmetricList := archive.GetMetricConfigSubCluster(req.Cluster, sc)\n   428→\t\t\tmetricNames[sc] = metricListToNames(metricList)\n   429→\t\t}\n   430→\t}\n   431→\n   432→\t// Perform health check against metric store\n   433→\thealthRepo, err := metricdispatch.GetHealthCheckRepo(req.Cluster)\n   434→\tif err != nil {\n   435→\t\tcclog.Warnf(\"NATS nodestate: no metric store for cluster %s, skipping health check: %v\", req.Cluster, err)\n   436→\t} else {\n   437→\t\tfor sc, nl := range m {\n   438→\t\t\tif sc != \"\" {\n   439→\t\t\t\tif results, err := healthRepo.HealthCheck(req.Cluster, nl, metricNames[sc]); err == nil {\n   440→\t\t\t\t\tmaps.Copy(healthResults, results)\n   441→\t\t\t\t}\n   442→\t\t\t}\n   443→\t\t}\n   444→\t}\n   445→\n   446→\tupdates := make([]repository.NodeStateUpdate, 0, len(req.Nodes))\n   447→\tfor _, node := range req.Nodes {\n   448→\t\tstate := nodeStates[node.Hostname]\n   449→\t\tvar healthState schema.MonitoringState\n   450→\t\tvar healthMetrics string\n   451→\t\tif state == schema.NodeStateDown {\n   452→\t\t\thealthState = schema.MonitoringStateFull\n   453→\t\t} else {\n   454→\t\t\thealthState = schema.MonitoringStateFailed\n   455→\t\t\tif result, ok := healthResults[node.Hostname]; ok {\n   456→\t\t\t\thealthState = result.State\n   457→\t\t\t\thealthMetrics = result.HealthMetrics\n   458→\t\t\t}\n   459→\t\t}\n   460→\t\tnodeState := schema.NodeStateDB{\n   461→\t\t\tTimeStamp:       requestReceived,\n   462→\t\t\tNodeState:       state,\n   463→\t\t\tCpusAllocated:   node.CpusAllocated,\n   464→\t\t\tMemoryAllocated: node.MemoryAllocated,\n   465→\t\t\tGpusAllocated:   node.GpusAllocated,\n   466→\t\t\tHealthState:     healthState,\n   467→\t\t\tHealthMetrics:   healthMetrics,\n   468→\t\t\tJobsRunning:     node.JobsRunning,\n   469→\t\t}\n   470→\t\tupdates = append(updates, repository.NodeStateUpdate{\n   471→\t\t\tHostname:  node.Hostname,\n   472→\t\t\tCluster:   req.Cluster,\n   473→\t\t\tNodeState: &nodeState,\n   474→\t\t})\n   475→\t}\n   476→\n   477→\tif err := repo.BatchUpdateNodeStates(updates); err != nil {\n   478→\t\tcclog.Errorf(\"NATS nodestate: batch update for cluster %s failed: %v\", req.Cluster, err)\n   479→\t}\n   480→\n   481→\tcclog.Debugf(\"NATS nodestate: updated %d node states for cluster %s\", len(req.Nodes), req.Cluster)\n   482→}\n   483→\n   484→// handleNodeState processes node state update messages received via NATS using InfluxDB line protocol.\n   485→// The message must be in line protocol format with measurement=\"nodestate\" and include:\n   486→//   - field \"event\" containing JSON payload (UpdateNodeStatesRequest)\n   487→//\n   488→// Example: nodestate event=\"{\\\"cluster\\\":\\\"testcluster\\\",\\\"nodes\\\":[...]}\" 1234567890000000000\n   489→func (api *NatsAPI) handleNodeState(subject string, data []byte) {\n   490→\tif len(data) == 0 {\n   491→\t\tcclog.Warnf(\"NATS %s: received empty message\", subject)\n   492→\t\treturn\n   493→\t}\n   494→\n   495→\td := influx.NewDecoderWithBytes(data)\n   496→\n   497→\tfor d.Next() {\n   498→\t\tm, err := receivers.DecodeInfluxMessage(d)\n   499→\t\tif err != nil {\n   500→\t\t\tcclog.Errorf(\"NATS %s: failed to decode InfluxDB line protocol message: %v\", subject, err)\n   501→\t\t\treturn\n   502→\t\t}\n   503→\n   504→\t\tif !m.IsEvent() {\n   505→\t\t\tcclog.Warnf(\"NATS %s: received non-event message, skipping\", subject)\n   506→\t\t\tcontinue\n   507→\t\t}\n   508→\n   509→\t\tif m.Name() == \"nodestate\" {\n   510→\t\t\tapi.processNodestateEvent(m)\n   511→\t\t} else {\n   512→\t\t\tcclog.Warnf(\"NATS %s: unexpected measurement name '%s', expected 'nodestate'\", subject, m.Name())\n   513→\t\t}\n   514→\t}\n   515→}\n   516→"}]},"uuid":"50441808-32a0-4cbf-87bf-293bbac87d97","timestamp":"2026-03-24T06:09:53.988Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"c188906f-21a5-483d-9208-085b4c200a0c","timestamp":"2026-03-24T06:09:53.990Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"c188906f-21a5-483d-9208-085b4c200a0c","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:09:55.949Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01BbUwDLPK2vY1FWESsZN69j","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01Hqxdbv5cqFxhGC5JknNinC","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go","limit":150},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":6,"cache_creation_input_tokens":21761,"cache_read_input_tokens":20250,"cache_creation":{"ephemeral_5m_input_tokens":21761,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQbFiHJvpjTg7gCWhZM","uuid":"9cc41e28-259c-4dc7-9622-66830202684e"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"cf6b395a-c1c3-4101-b342-f55ef3ea0ce5","timestamp":"2026-03-24T06:09:55.950Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"cf6b395a-c1c3-4101-b342-f55ef3ea0ce5","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01Hqxdbv5cqFxhGC5JknNinC","type":"tool_result","content":"     1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n     2→// All rights reserved. This file is part of cc-backend.\n     3→// Use of this source code is governed by a MIT-style\n     4→// license that can be found in the LICENSE file.\n     5→\n     6→// Package metricstore provides an efficient in-memory time-series metric storage system\n     7→// with support for hierarchical data organization, checkpointing, and archiving.\n     8→//\n     9→// The package organizes metrics in a tree structure (cluster → host → component) and\n    10→// provides concurrent read/write access to metric data with configurable aggregation strategies.\n    11→// Background goroutines handle periodic checkpointing (JSON or Avro format), archiving old data,\n    12→// and enforcing retention policies.\n    13→//\n    14→// Key features:\n    15→//   - In-memory metric storage with configurable retention\n    16→//   - Hierarchical data organization (selectors)\n    17→//   - Concurrent checkpoint/archive workers\n    18→//   - Support for sum and average aggregation\n    19→//   - NATS integration for metric ingestion\n    20→package metricstore\n    21→\n    22→import (\n    23→\t\"bytes\"\n    24→\t\"context\"\n    25→\t\"encoding/json\"\n    26→\t\"errors\"\n    27→\t\"fmt\"\n    28→\t\"runtime\"\n    29→\t\"runtime/debug\"\n    30→\t\"slices\"\n    31→\t\"sync\"\n    32→\t\"time\"\n    33→\n    34→\t\"github.com/ClusterCockpit/cc-backend/internal/config\"\n    35→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n    36→\t\"github.com/ClusterCockpit/cc-lib/v2/resampler\"\n    37→\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n    38→\t\"github.com/ClusterCockpit/cc-lib/v2/util\"\n    39→)\n    40→\n    41→// GlobalState holds the global state for the metric store with thread-safe access.\n    42→type GlobalState struct {\n    43→\tmu                sync.RWMutex\n    44→\tlastRetentionTime int64\n    45→\tselectorsExcluded bool\n    46→}\n    47→\n    48→var (\n    49→\tsingleton  sync.Once\n    50→\tmsInstance *MemoryStore\n    51→\t// shutdownFunc stores the context cancellation function created in Init\n    52→\t// and is called during Shutdown to cancel all background goroutines\n    53→\tshutdownFunc   context.CancelFunc\n    54→\tshutdownFuncMu sync.Mutex // Protects shutdownFunc from concurrent access\n    55→\t// Create a global instance\n    56→\tstate = &GlobalState{}\n    57→)\n    58→\n    59→// NodeProvider provides information about nodes currently in use by running jobs.\n    60→//\n    61→// This interface allows metricstore to query job information without directly\n    62→// depending on the repository package, breaking the import cycle.\n    63→//\n    64→// Implementations should return nodes that are actively processing jobs started\n    65→// before the given timestamp. These nodes will be excluded from retention-based\n    66→// garbage collection to prevent data loss for jobs that are still running or\n    67→// recently completed.\n    68→type NodeProvider interface {\n    69→\t// GetUsedNodes returns a map of cluster names to sorted lists of unique hostnames\n    70→\t// that are currently in use by jobs that started before the given timestamp.\n    71→\t//\n    72→\t// Parameters:\n    73→\t//   - ts: Unix timestamp threshold - returns nodes with jobs started before this time\n    74→\t//\n    75→\t// Returns:\n    76→\t//   - Map of cluster names to lists of node hostnames that should be excluded from garbage collection\n    77→\t//   - Error if the query fails\n    78→\tGetUsedNodes(ts int64) (map[string][]string, error)\n    79→}\n    80→\n    81→// Metric represents a single metric data point to be written to the store.\n    82→type Metric struct {\n    83→\tName  string\n    84→\tValue schema.Float\n    85→\t// MetricConfig contains frequency and aggregation settings for this metric.\n    86→\t// If Frequency is 0, configuration will be looked up from MemoryStore.Metrics during Write().\n    87→\tMetricConfig MetricConfig\n    88→}\n    89→\n    90→// MemoryStore is the main in-memory time-series metric storage implementation.\n    91→//\n    92→// It organizes metrics in a hierarchical tree structure where each level represents\n    93→// a component of the system hierarchy (e.g., cluster → host → CPU). Each level can\n    94→// store multiple metrics as time-series buffers.\n    95→//\n    96→// The store is initialized as a singleton via InitMetrics() and accessed via GetMemoryStore().\n    97→// All public methods are safe for concurrent use.\n    98→type MemoryStore struct {\n    99→\tMetrics      map[string]MetricConfig\n   100→\troot         Level\n   101→\tnodeProvider NodeProvider\n   102→}\n   103→\n   104→// Init initializes the metric store from configuration and starts background workers.\n   105→//\n   106→// This function must be called exactly once before any other metricstore operations.\n   107→// It performs the following initialization steps:\n   108→//  1. Validates and decodes the metric store configuration\n   109→//  2. Configures worker pool size (defaults to NumCPU/2+1, max 10)\n   110→//  3. Loads metric configurations from all registered clusters\n   111→//  4. Restores checkpoints within the retention window\n   112→//  5. Starts background workers for retention, checkpointing, archiving, and monitoring\n   113→//  6. Optionally subscribes to NATS for real-time metric ingestion\n   114→//\n   115→// Parameters:\n   116→//   - rawConfig: JSON configuration for the metric store (see MetricStoreConfig)\n   117→//   - wg: WaitGroup that will be incremented for each background goroutine started\n   118→//\n   119→// The function will call cclog.Fatal on critical errors during initialization.\n   120→// Use Shutdown() to cleanly stop all background workers started by Init().\n   121→//\n   122→// Note: Signal handling must be implemented by the caller. Call Shutdown() when\n   123→// receiving termination signals to ensure checkpoint data is persisted.\n   124→func Init(rawConfig json.RawMessage, metrics map[string]MetricConfig, wg *sync.WaitGroup) {\n   125→\tstartupTime := time.Now()\n   126→\n   127→\tif rawConfig != nil {\n   128→\t\tconfig.Validate(configSchema, rawConfig)\n   129→\t\tdec := json.NewDecoder(bytes.NewReader(rawConfig))\n   130→\t\tdec.DisallowUnknownFields()\n   131→\t\tif err := dec.Decode(&Keys); err != nil {\n   132→\t\t\tcclog.Abortf(\"[METRICSTORE]> Metric Store Config Init: Could not decode config file '%s'.\\nError: %s\\n\", rawConfig, err.Error())\n   133→\t\t}\n   134→\t}\n   135→\n   136→\t// Set NumWorkers from config or use default\n   137→\tif Keys.NumWorkers <= 0 {\n   138→\t\tKeys.NumWorkers = min(runtime.NumCPU()/2+1, DefaultMaxWorkers)\n   139→\t}\n   140→\tcclog.Debugf(\"[METRICSTORE]> Using %d workers for checkpoint/archive operations\\n\", Keys.NumWorkers)\n   141→\n   142→\t// Pass the config.MetricStoreKeys\n   143→\tInitMetrics(metrics)\n   144→\n   145→\tms := GetMemoryStore()\n   146→\n   147→\td, err := time.ParseDuration(Keys.RetentionInMemory)\n   148→\tif err != nil {\n   149→\t\tcclog.Fatal(err)\n   150→\t}"}]},"uuid":"7e459e32-7df0-4bc7-a5f5-b36591a76bf3","timestamp":"2026-03-24T06:09:55.968Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"d9fdafb3-ac95-4996-b1b3-297a93819f9b","timestamp":"2026-03-24T06:09:56.148Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"d9fdafb3-ac95-4996-b1b3-297a93819f9b","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:09:56.389Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01BbUwDLPK2vY1FWESsZN69j","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01DoiFkSXkwjwnXg5Z7K1pmQ","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiver.go","limit":150},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":6,"cache_creation_input_tokens":21761,"cache_read_input_tokens":20250,"cache_creation":{"ephemeral_5m_input_tokens":21761,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQbFiHJvpjTg7gCWhZM","uuid":"6fd2a660-924c-49e1-8476-6beffb0f440a"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"7b7a63d7-1342-4e25-9bc6-cd9781d46a09","timestamp":"2026-03-24T06:09:56.390Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"7b7a63d7-1342-4e25-9bc6-cd9781d46a09","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01DoiFkSXkwjwnXg5Z7K1pmQ","type":"tool_result","content":"     1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n     2→// All rights reserved. This file is part of cc-backend.\n     3→// Use of this source code is governed by a MIT-style\n     4→// license that can be found in the LICENSE file.\n     5→\n     6→package archiver\n     7→\n     8→import (\n     9→\t\"context\"\n    10→\t\"math\"\n    11→\n    12→\t\"github.com/ClusterCockpit/cc-backend/internal/metricdispatch\"\n    13→\t\"github.com/ClusterCockpit/cc-backend/pkg/archive\"\n    14→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n    15→\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n    16→)\n    17→\n    18→// ArchiveJob archives a completed job's metric data to the configured archive backend.\n    19→//\n    20→// This function performs the following operations:\n    21→//  1. Loads all metric data for the job from the metric data repository\n    22→//  2. Calculates job-level statistics (avg, min, max) for each metric\n    23→//  3. Stores the job metadata and metric data to the archive backend\n    24→//\n    25→// Metric data is retrieved at the highest available resolution (typically 60s)\n    26→// for the following scopes:\n    27→//   - Node scope (always)\n    28→//   - Core scope (for jobs with ≤8 nodes, to reduce data volume)\n    29→//   - Accelerator scope (if job used accelerators)\n    30→//\n    31→// The function respects context cancellation. If ctx is cancelled (e.g., during\n    32→// shutdown timeout), the operation will be interrupted and return an error.\n    33→//\n    34→// Parameters:\n    35→//   - job: The job to archive (must be a completed job)\n    36→//   - ctx: Context for cancellation and timeout control\n    37→//\n    38→// Returns:\n    39→//   - *schema.Job with populated Statistics field\n    40→//   - error if data loading or archiving fails\n    41→//\n    42→// If config.Keys.DisableArchive is true, only job statistics are calculated\n    43→// and returned (no data is written to archive backend).\n    44→func ArchiveJob(job *schema.Job, ctx context.Context) (*schema.Job, error) {\n    45→\tallMetrics := make([]string, 0)\n    46→\tmetricConfigs := archive.GetCluster(job.Cluster).MetricConfig\n    47→\tfor _, mc := range metricConfigs {\n    48→\t\tallMetrics = append(allMetrics, mc.Name)\n    49→\t}\n    50→\n    51→\tscopes := []schema.MetricScope{schema.MetricScopeNode}\n    52→\t// FIXME: Add a config option for this\n    53→\tif job.NumNodes <= 8 {\n    54→\t\t// This will add the native scope if core scope is not available\n    55→\t\tscopes = append(scopes, schema.MetricScopeCore)\n    56→\t}\n    57→\n    58→\tif job.NumAcc > 0 {\n    59→\t\tscopes = append(scopes, schema.MetricScopeAccelerator)\n    60→\t}\n    61→\n    62→\tjobData, err := metricdispatch.LoadData(job, allMetrics, scopes, ctx, 0) // 0 Resulotion-Value retrieves highest res (60s)\n    63→\tif err != nil {\n    64→\t\tcclog.Error(\"Error wile loading job data for archiving\")\n    65→\t\treturn nil, err\n    66→\t}\n    67→\n    68→\tjob.Statistics = make(map[string]schema.JobStatistics)\n    69→\n    70→\tfor metric, data := range jobData {\n    71→\t\tavg, min, max := 0.0, math.MaxFloat32, -math.MaxFloat32\n    72→\t\tnodeData, ok := data[\"node\"]\n    73→\t\tif !ok {\n    74→\t\t\t// This should never happen ?\n    75→\t\t\tcontinue\n    76→\t\t}\n    77→\n    78→\t\tfor _, series := range nodeData.Series {\n    79→\t\t\tavg += series.Statistics.Avg\n    80→\t\t\tmin = math.Min(min, series.Statistics.Min)\n    81→\t\t\tmax = math.Max(max, series.Statistics.Max)\n    82→\t\t}\n    83→\n    84→\t\t// Round AVG Result to 2 Digits\n    85→\t\tjob.Statistics[metric] = schema.JobStatistics{\n    86→\t\t\tUnit: schema.Unit{\n    87→\t\t\t\tPrefix: archive.GetMetricConfig(job.Cluster, metric).Unit.Prefix,\n    88→\t\t\t\tBase:   archive.GetMetricConfig(job.Cluster, metric).Unit.Base,\n    89→\t\t\t},\n    90→\t\t\tAvg: (math.Round((avg/float64(job.NumNodes))*100) / 100),\n    91→\t\t\tMin: min,\n    92→\t\t\tMax: max,\n    93→\t\t}\n    94→\t}\n    95→\n    96→\treturn job, archive.GetHandle().ImportJob(job, &jobData)\n    97→}\n    98→"}]},"uuid":"21c98a2d-4b7c-41d3-8f77-4982f9689411","timestamp":"2026-03-24T06:09:56.410Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"e5bc8b7d-6894-4d4f-85fa-e860889e0d96","timestamp":"2026-03-24T06:09:56.528Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"e5bc8b7d-6894-4d4f-85fa-e860889e0d96","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:09:56.601Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01BbUwDLPK2vY1FWESsZN69j","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01TsmxJAzaaAbJUW8snK2kN1","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go","limit":100},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":6,"cache_creation_input_tokens":21761,"cache_read_input_tokens":20250,"cache_creation":{"ephemeral_5m_input_tokens":21761,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQbFiHJvpjTg7gCWhZM","uuid":"8851da6f-50ae-4174-960c-a1674a9da6d3"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"f22f7d63-bb35-4b9a-800d-ba19decdc3ce","timestamp":"2026-03-24T06:09:56.601Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"f22f7d63-bb35-4b9a-800d-ba19decdc3ce","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01TsmxJAzaaAbJUW8snK2kN1","type":"tool_result","content":"     1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n     2→// All rights reserved. This file is part of cc-backend.\n     3→// Use of this source code is governed by a MIT-style\n     4→// license that can be found in the LICENSE file.\n     5→\n     6→// Package archiver provides asynchronous job archiving functionality for ClusterCockpit.\n     7→//\n     8→// The archiver runs a background worker goroutine that processes job archiving requests\n     9→// from a buffered channel. When jobs complete, their metric data is archived from the\n    10→// metric store to the configured archive backend (filesystem, S3, etc.).\n    11→//\n    12→// # Architecture\n    13→//\n    14→// The archiver uses a producer-consumer pattern:\n    15→//   - Producer: TriggerArchiving() sends jobs to archiveChannel\n    16→//   - Consumer: archivingWorker() processes jobs from the channel\n    17→//   - Coordination: sync.WaitGroup tracks pending archive operations\n    18→//\n    19→// # Lifecycle\n    20→//\n    21→//  1. Start(repo, ctx) - Initialize worker with context for cancellation\n    22→//  2. TriggerArchiving(job) - Queue job for archiving (called when job stops)\n    23→//  3. archivingWorker() - Background goroutine processes jobs\n    24→//  4. Shutdown(timeout) - Graceful shutdown with timeout\n    25→//\n    26→// # Graceful Shutdown\n    27→//\n    28→// The archiver supports graceful shutdown with configurable timeout:\n    29→//   - Closes channel to reject new jobs\n    30→//   - Waits for pending jobs to complete (up to timeout)\n    31→//   - Cancels context if timeout exceeded\n    32→//   - Ensures worker goroutine exits cleanly\n    33→//\n    34→// # Example Usage\n    35→//\n    36→//\t// Initialize archiver\n    37→//\tctx, cancel := context.WithCancel(context.Background())\n    38→//\tdefer cancel()\n    39→//\tarchiver.Start(jobRepository, ctx)\n    40→//\n    41→//\t// Trigger archiving when job completes\n    42→//\tarchiver.TriggerArchiving(job)\n    43→//\n    44→//\t// Graceful shutdown with 10 second timeout\n    45→//\tif err := archiver.Shutdown(10 * time.Second); err != nil {\n    46→//\t    log.Printf(\"Archiver shutdown timeout: %v\", err)\n    47→//\t}\n    48→package archiver\n    49→\n    50→import (\n    51→\t\"context\"\n    52→\t\"fmt\"\n    53→\t\"sync\"\n    54→\t\"time\"\n    55→\n    56→\t\"github.com/ClusterCockpit/cc-backend/internal/repository\"\n    57→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n    58→\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n    59→\tsq \"github.com/Masterminds/squirrel\"\n    60→)\n    61→\n    62→var (\n    63→\tarchivePending sync.WaitGroup\n    64→\tarchiveChannel chan *schema.Job\n    65→\tjobRepo        *repository.JobRepository\n    66→\tshutdownCtx    context.Context\n    67→\tshutdownCancel context.CancelFunc\n    68→\tworkerDone     chan struct{}\n    69→)\n    70→\n    71→// Start initializes the archiver and starts the background worker goroutine.\n    72→//\n    73→// The archiver processes job archiving requests asynchronously via a buffered channel.\n    74→// Jobs are sent to the channel using TriggerArchiving() and processed by the worker.\n    75→//\n    76→// Parameters:\n    77→//   - r: JobRepository instance for database operations\n    78→//   - ctx: Context for cancellation (shutdown signal propagation)\n    79→//\n    80→// The worker goroutine will run until:\n    81→//   - ctx is cancelled (via parent shutdown)\n    82→//   - archiveChannel is closed (via Shutdown())\n    83→//\n    84→// Must be called before TriggerArchiving(). Safe to call only once.\n    85→func Start(r *repository.JobRepository, ctx context.Context) {\n    86→\tshutdownCtx, shutdownCancel = context.WithCancel(ctx)\n    87→\tarchiveChannel = make(chan *schema.Job, 128)\n    88→\tworkerDone = make(chan struct{})\n    89→\tjobRepo = r\n    90→\n    91→\tgo archivingWorker()\n    92→}\n    93→\n    94→// archivingWorker is the background goroutine that processes job archiving requests.\n    95→//\n    96→// The worker loop:\n    97→//  1. Blocks waiting for jobs on archiveChannel or shutdown signal\n    98→//  2. Fetches job metadata from repository\n    99→//  3. Archives job data to configured backend (calls ArchiveJob)\n   100→//  4. Updates job footprint and energy metrics in database"}]},"uuid":"7147c2c5-2894-4ffd-923a-ce4d1208973e","timestamp":"2026-03-24T06:09:56.616Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"6be4f0dc-d1c1-4d08-844b-bd8470777a10","timestamp":"2026-03-24T06:09:56.617Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"6be4f0dc-d1c1-4d08-844b-bd8470777a10","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:09:58.809Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01Wy87FybiAXFw2i9d8ZbL6v","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_019CC5q115WUkZAGLyzbtC38","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go","offset":100},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":6,"cache_creation_input_tokens":5412,"cache_read_input_tokens":42011,"cache_creation":{"ephemeral_5m_input_tokens":5412,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQbStVWhxJDTxU8sFct","uuid":"ad3ff2d0-1daf-4a3c-b1a5-dbb456021015"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"f8ce8c58-afe6-4ac7-a9b7-e5ae38f6aa58","timestamp":"2026-03-24T06:09:58.809Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"f8ce8c58-afe6-4ac7-a9b7-e5ae38f6aa58","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_019CC5q115WUkZAGLyzbtC38","type":"tool_result","content":"   100→//  4. Updates job footprint and energy metrics in database\n   101→//  5. Marks job as successfully archived\n   102→//  6. Calls job stop hooks\n   103→//\n   104→// The worker exits when:\n   105→//   - shutdownCtx is cancelled (timeout during shutdown)\n   106→//   - archiveChannel is closed (normal shutdown)\n   107→//\n   108→// Errors during archiving are logged and the job is marked as failed,\n   109→// but the worker continues processing other jobs.\n   110→func archivingWorker() {\n   111→\tdefer close(workerDone)\n   112→\n   113→\tfor {\n   114→\t\tselect {\n   115→\t\tcase <-shutdownCtx.Done():\n   116→\t\t\tcclog.Info(\"Archive worker received shutdown signal\")\n   117→\t\t\treturn\n   118→\n   119→\t\tcase job, ok := <-archiveChannel:\n   120→\t\t\tif !ok {\n   121→\t\t\t\tcclog.Info(\"Archive channel closed, worker exiting\")\n   122→\t\t\t\treturn\n   123→\t\t\t}\n   124→\n   125→\t\t\tstart := time.Now()\n   126→\t\t\t// not using meta data, called to load JobMeta into Cache?\n   127→\t\t\t// will fail if job meta not in repository\n   128→\t\t\tif _, err := jobRepo.FetchMetadata(job); err != nil {\n   129→\t\t\t\tcclog.Errorf(\"archiving job (dbid: %d) failed at check metadata step: %s\", *job.ID, err.Error())\n   130→\t\t\t\tjobRepo.UpdateMonitoringStatus(*job.ID, schema.MonitoringStatusArchivingFailed)\n   131→\t\t\t\tarchivePending.Done()\n   132→\t\t\t\tcontinue\n   133→\t\t\t}\n   134→\n   135→\t\t\t// ArchiveJob will fetch all the data from a MetricDataRepository and push into configured archive backend\n   136→\t\t\t// Use shutdown context to allow cancellation\n   137→\t\t\tjobMeta, err := ArchiveJob(job, shutdownCtx)\n   138→\t\t\tif err != nil {\n   139→\t\t\t\tcclog.Errorf(\"archiving job (dbid: %d) failed at archiving job step: %s\", *job.ID, err.Error())\n   140→\t\t\t\tjobRepo.UpdateMonitoringStatus(*job.ID, schema.MonitoringStatusArchivingFailed)\n   141→\t\t\t\tarchivePending.Done()\n   142→\t\t\t\tcontinue\n   143→\t\t\t}\n   144→\n   145→\t\t\tstmt := sq.Update(\"job\").Where(\"job.id = ?\", job.ID)\n   146→\n   147→\t\t\tif stmt, err = jobRepo.UpdateFootprint(stmt, jobMeta); err != nil {\n   148→\t\t\t\tcclog.Errorf(\"archiving job (dbid: %d) failed at update Footprint step: %s\", *job.ID, err.Error())\n   149→\t\t\t\tarchivePending.Done()\n   150→\t\t\t\tcontinue\n   151→\t\t\t}\n   152→\t\t\tif stmt, err = jobRepo.UpdateEnergy(stmt, jobMeta); err != nil {\n   153→\t\t\t\tcclog.Errorf(\"archiving job (dbid: %d) failed at update Energy step: %s\", *job.ID, err.Error())\n   154→\t\t\t\tarchivePending.Done()\n   155→\t\t\t\tcontinue\n   156→\t\t\t}\n   157→\t\t\t// Update the jobs database entry one last time:\n   158→\t\t\tstmt = jobRepo.MarkArchived(stmt, schema.MonitoringStatusArchivingSuccessful)\n   159→\t\t\tif err := jobRepo.Execute(stmt); err != nil {\n   160→\t\t\t\tcclog.Errorf(\"archiving job (dbid: %d) failed at db execute: %s\", *job.ID, err.Error())\n   161→\t\t\t\tarchivePending.Done()\n   162→\t\t\t\tcontinue\n   163→\t\t\t}\n   164→\t\t\tcclog.Debugf(\"archiving job %d took %s\", job.JobID, time.Since(start))\n   165→\t\t\tcclog.Infof(\"archiving job (dbid: %d) successful\", *job.ID)\n   166→\n   167→\t\t\trepository.CallJobStopHooks(job)\n   168→\t\t\tarchivePending.Done()\n   169→\t\t}\n   170→\t}\n   171→}\n   172→\n   173→// TriggerArchiving queues a job for asynchronous archiving.\n   174→//\n   175→// This function should be called when a job completes (stops) to archive its\n   176→// metric data from the metric store to the configured archive backend.\n   177→//\n   178→// The function:\n   179→//  1. Increments the pending job counter (WaitGroup)\n   180→//  2. Sends the job to the archiving channel (buffered, capacity 128)\n   181→//  3. Returns immediately (non-blocking unless channel is full)\n   182→//\n   183→// The actual archiving is performed asynchronously by the worker goroutine.\n   184→// Upon completion, the worker will decrement the pending counter.\n   185→//\n   186→// Panics if Start() has not been called first.\n   187→func TriggerArchiving(job *schema.Job) {\n   188→\tif archiveChannel == nil {\n   189→\t\tcclog.Fatal(\"Cannot archive without archiving channel. Did you Start the archiver?\")\n   190→\t}\n   191→\n   192→\tarchivePending.Add(1)\n   193→\tarchiveChannel <- job\n   194→}\n   195→\n   196→// Shutdown performs a graceful shutdown of the archiver with a configurable timeout.\n   197→//\n   198→// The shutdown process:\n   199→//  1. Closes archiveChannel - no new jobs will be accepted\n   200→//  2. Waits for pending jobs to complete (up to timeout duration)\n   201→//  3. If timeout is exceeded:\n   202→//     - Cancels shutdownCtx to interrupt ongoing ArchiveJob operations\n   203→//     - Returns error indicating timeout\n   204→//  4. Waits for worker goroutine to exit cleanly\n   205→//\n   206→// Parameters:\n   207→//   - timeout: Maximum duration to wait for pending jobs to complete\n   208→//     (recommended: 10-30 seconds for production)\n   209→//\n   210→// Returns:\n   211→//   - nil if all jobs completed within timeout\n   212→//   - error if timeout was exceeded (some jobs may not have been archived)\n   213→//\n   214→// Jobs that don't complete within the timeout will be marked as failed.\n   215→// The function always ensures the worker goroutine exits before returning.\n   216→//\n   217→// Example:\n   218→//\n   219→//\tif err := archiver.Shutdown(10 * time.Second); err != nil {\n   220→//\t    log.Printf(\"Some jobs did not complete: %v\", err)\n   221→//\t}\n   222→func Shutdown(timeout time.Duration) error {\n   223→\tcclog.Info(\"Initiating archiver shutdown...\")\n   224→\n   225→\t// Close channel to signal no more jobs will be accepted\n   226→\tclose(archiveChannel)\n   227→\n   228→\t// Create a channel to signal when all jobs are done\n   229→\tdone := make(chan struct{})\n   230→\tgo func() {\n   231→\t\tarchivePending.Wait()\n   232→\t\tclose(done)\n   233→\t}()\n   234→\n   235→\t// Wait for jobs to complete or timeout\n   236→\tselect {\n   237→\tcase <-done:\n   238→\t\tcclog.Info(\"All archive jobs completed successfully\")\n   239→\t\t// Wait for worker to exit\n   240→\t\t<-workerDone\n   241→\t\treturn nil\n   242→\tcase <-time.After(timeout):\n   243→\t\tcclog.Warn(\"Archiver shutdown timeout exceeded, cancelling remaining operations\")\n   244→\t\t// Cancel any ongoing operations\n   245→\t\tshutdownCancel()\n   246→\t\t// Wait for worker to exit\n   247→\t\t<-workerDone\n   248→\t\treturn fmt.Errorf(\"archiver shutdown timeout after %v\", timeout)\n   249→\t}\n   250→}\n   251→"}]},"uuid":"a09866a7-5883-4016-9fc2-3213f4309d6e","timestamp":"2026-03-24T06:09:58.817Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"b0d0c8d6-a01e-4ea8-a751-d56dca00df3a","timestamp":"2026-03-24T06:09:59.008Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"b0d0c8d6-a01e-4ea8-a751-d56dca00df3a","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:09:59.159Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01Wy87FybiAXFw2i9d8ZbL6v","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01XSveT4C2tEWuknYTdrNq4T","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go","offset":150,"limit":150},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":6,"cache_creation_input_tokens":5412,"cache_read_input_tokens":42011,"cache_creation":{"ephemeral_5m_input_tokens":5412,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQbStVWhxJDTxU8sFct","uuid":"183a5622-fff4-4671-a312-de957eaef332"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"4e98aba4-a22d-494a-929d-1c7fff83e848","timestamp":"2026-03-24T06:09:59.159Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"4e98aba4-a22d-494a-929d-1c7fff83e848","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01XSveT4C2tEWuknYTdrNq4T","type":"tool_result","content":"   150→\t}\n   151→\n   152→\trestoreFrom := startupTime.Add(-d)\n   153→\tcclog.Infof(\"[METRICSTORE]> Loading checkpoints newer than %s\\n\", restoreFrom.Format(time.RFC3339))\n   154→\tfiles, err := ms.FromCheckpointFiles(Keys.Checkpoints.RootDir, restoreFrom.Unix())\n   155→\tloadedData := ms.SizeInBytes() / 1024 / 1024 // In MB\n   156→\tif err != nil {\n   157→\t\tcclog.Fatalf(\"[METRICSTORE]> Loading checkpoints failed: %s\\n\", err.Error())\n   158→\t} else {\n   159→\t\tcclog.Infof(\"[METRICSTORE]> Checkpoints loaded (%d files, %d MB, that took %fs)\\n\", files, loadedData, time.Since(startupTime).Seconds())\n   160→\t}\n   161→\n   162→\t// Try to use less memory by forcing a GC run here and then\n   163→\t// lowering the target percentage. The default of 100 means\n   164→\t// that only once the ratio of new allocations execeds the\n   165→\t// previously active heap, a GC is triggered.\n   166→\t// Forcing a GC here will set the \"previously active heap\"\n   167→\t// to a minumum.\n   168→\t// runtime.GC()\n   169→\n   170→\tctx, shutdown := context.WithCancel(context.Background())\n   171→\n   172→\tRetention(wg, ctx)\n   173→\tCheckpointing(wg, ctx)\n   174→\tCleanUp(wg, ctx)\n   175→\tWALStaging(wg, ctx)\n   176→\tMemoryUsageTracker(wg, ctx)\n   177→\n   178→\t// Note: Signal handling has been removed from this function.\n   179→\t// The caller is responsible for handling shutdown signals and calling\n   180→\t// the shutdown() function when appropriate.\n   181→\t// Store the shutdown function for later use by Shutdown()\n   182→\tshutdownFuncMu.Lock()\n   183→\tshutdownFunc = shutdown\n   184→\tshutdownFuncMu.Unlock()\n   185→\n   186→\tif Keys.Subscriptions != nil {\n   187→\t\twg.Go(func() {\n   188→\t\t\tif err := ReceiveNats(ms, Keys.NumWorkers, ctx); err != nil {\n   189→\t\t\t\tcclog.Fatal(err)\n   190→\t\t\t}\n   191→\t\t})\n   192→\t}\n   193→}\n   194→\n   195→// InitMetrics initializes the singleton MemoryStore instance with the given metric configurations.\n   196→//\n   197→// This function must be called before GetMemoryStore() and can only be called once due to\n   198→// the singleton pattern. It assigns each metric an internal offset for efficient buffer indexing.\n   199→//\n   200→// Parameters:\n   201→//   - metrics: Map of metric names to their configurations (frequency and aggregation strategy)\n   202→//\n   203→// Panics if any metric has Frequency == 0, which indicates an invalid configuration.\n   204→//\n   205→// After this call, the global msInstance is ready for use via GetMemoryStore().\n   206→func InitMetrics(metrics map[string]MetricConfig) {\n   207→\tsingleton.Do(func() {\n   208→\t\toffset := 0\n   209→\t\tfor key, cfg := range metrics {\n   210→\t\t\tif cfg.Frequency == 0 {\n   211→\t\t\t\tpanic(\"[METRICSTORE]> invalid frequency\")\n   212→\t\t\t}\n   213→\n   214→\t\t\tmetrics[key] = MetricConfig{\n   215→\t\t\t\tFrequency:   cfg.Frequency,\n   216→\t\t\t\tAggregation: cfg.Aggregation,\n   217→\t\t\t\toffset:      offset,\n   218→\t\t\t}\n   219→\t\t\toffset += 1\n   220→\t\t}\n   221→\n   222→\t\tmsInstance = &MemoryStore{\n   223→\t\t\troot: Level{\n   224→\t\t\t\tmetrics:  make([]*buffer, len(metrics)),\n   225→\t\t\t\tchildren: make(map[string]*Level),\n   226→\t\t\t},\n   227→\t\t\tMetrics: metrics,\n   228→\t\t}\n   229→\t})\n   230→}\n   231→\n   232→// GetMemoryStore returns the singleton MemoryStore instance.\n   233→//\n   234→// Returns the initialized MemoryStore singleton. Calls cclog.Fatal if InitMetrics() was not called first.\n   235→//\n   236→// This function is safe for concurrent use after initialization.\n   237→func GetMemoryStore() *MemoryStore {\n   238→\tif msInstance == nil {\n   239→\t\tcclog.Warnf(\"[METRICSTORE]> MemoryStore not initialized!\")\n   240→\t}\n   241→\n   242→\treturn msInstance\n   243→}\n   244→\n   245→func (ms *MemoryStore) GetMetricFrequency(metricName string) (int64, error) {\n   246→\tif metric, ok := ms.Metrics[metricName]; ok {\n   247→\t\treturn metric.Frequency, nil\n   248→\t}\n   249→\treturn 0, fmt.Errorf(\"[METRICSTORE]> metric %s not found\", metricName)\n   250→}\n   251→\n   252→// SetNodeProvider sets the NodeProvider implementation for the MemoryStore.\n   253→// This must be called during initialization to provide job state information\n   254→// for selective buffer retention during Free operations.\n   255→// If not set, the Free function will fall back to freeing all buffers.\n   256→func (ms *MemoryStore) SetNodeProvider(provider NodeProvider) {\n   257→\tms.nodeProvider = provider\n   258→}\n   259→\n   260→// Shutdown performs a graceful shutdown of the metric store.\n   261→//\n   262→// This function cancels all background goroutines started by Init() and writes\n   263→// a final checkpoint to disk before returning. It should be called when the\n   264→// application receives a termination signal.\n   265→//\n   266→// The function will:\n   267→//  1. Cancel the context to stop all background workers\n   268→//  2. Close the WAL messages channel if using WAL format\n   269→//  3. Write a final checkpoint to preserve in-memory data\n   270→//  4. Log any errors encountered during shutdown\n   271→//\n   272→// Note: This function blocks until the final checkpoint is written.\n   273→func Shutdown() {\n   274→\tshutdownFuncMu.Lock()\n   275→\tdefer shutdownFuncMu.Unlock()\n   276→\tif shutdownFunc != nil {\n   277→\t\tshutdownFunc()\n   278→\t}\n   279→\n   280→\tif Keys.Checkpoints.FileFormat == \"wal\" {\n   281→\t\tfor _, ch := range walShardChs {\n   282→\t\t\tclose(ch)\n   283→\t\t}\n   284→\t}\n   285→\n   286→\tcclog.Infof(\"[METRICSTORE]> Writing to '%s'...\\n\", Keys.Checkpoints.RootDir)\n   287→\tvar files int\n   288→\tvar err error\n   289→\n   290→\tms := GetMemoryStore()\n   291→\n   292→\tlastCheckpointMu.Lock()\n   293→\tfrom := lastCheckpoint\n   294→\tlastCheckpointMu.Unlock()\n   295→\n   296→\tif Keys.Checkpoints.FileFormat == \"wal\" {\n   297→\t\tvar hostDirs []string\n   298→\t\tfiles, hostDirs, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n   299→\t\tif err == nil {"}]},"uuid":"3563d5c3-ab03-41a8-ab4d-86bc1d442547","timestamp":"2026-03-24T06:09:59.172Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"971c0aa4-8776-453b-8f28-1d64d30f9579","timestamp":"2026-03-24T06:09:59.183Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"971c0aa4-8776-453b-8f28-1d64d30f9579","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:10:01.823Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_019TKeXJBJgcsoEdVm8Nnt6q","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_016aLPTNExWHJ42yGgUaLSLv","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go","offset":300,"limit":100},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":6,"cache_creation_input_tokens":4334,"cache_read_input_tokens":47423,"cache_creation":{"ephemeral_5m_input_tokens":4334,"ephemeral_1h_input_tokens":0},"output_tokens":3,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQbdwkSAeiNsicdA1PC","uuid":"15635ca0-980c-458a-99c9-f9e1b3daa064"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"20c4eaa4-a18c-4445-b88e-677bdebdc3b9","timestamp":"2026-03-24T06:10:01.824Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"20c4eaa4-a18c-4445-b88e-677bdebdc3b9","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_016aLPTNExWHJ42yGgUaLSLv","type":"tool_result","content":"   300→\t\t\tRotateWALFilesAfterShutdown(hostDirs)\n   301→\t\t}\n   302→\t} else {\n   303→\t\tfiles, err = ms.ToCheckpoint(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n   304→\t}\n   305→\n   306→\tif err != nil {\n   307→\t\tcclog.Errorf(\"[METRICSTORE]> Writing checkpoint failed: %s\\n\", err.Error())\n   308→\t}\n   309→\tcclog.Infof(\"[METRICSTORE]> Done! (%d files written)\\n\", files)\n   310→}\n   311→\n   312→// Retention starts a background goroutine that periodically frees old metric data.\n   313→//\n   314→// This worker runs at half the retention interval and calls Free() to remove buffers\n   315→// older than the configured retention time. It respects the NodeProvider to preserve\n   316→// data for nodes with active jobs.\n   317→//\n   318→// Parameters:\n   319→//   - wg: WaitGroup to signal completion when context is cancelled\n   320→//   - ctx: Context for cancellation signal\n   321→//\n   322→// The goroutine exits when ctx is cancelled.\n   323→func Retention(wg *sync.WaitGroup, ctx context.Context) {\n   324→\tms := GetMemoryStore()\n   325→\n   326→\twg.Go(func() {\n   327→\t\td, err := time.ParseDuration(Keys.RetentionInMemory)\n   328→\t\tif err != nil {\n   329→\t\t\tcclog.Fatal(err)\n   330→\t\t}\n   331→\t\tif d <= 0 {\n   332→\t\t\treturn\n   333→\t\t}\n   334→\n   335→\t\ttickInterval := d / 2\n   336→\t\tif tickInterval <= 0 {\n   337→\t\t\treturn\n   338→\t\t}\n   339→\t\tticker := time.NewTicker(tickInterval)\n   340→\t\tdefer ticker.Stop()\n   341→\n   342→\t\tfor {\n   343→\t\t\tselect {\n   344→\t\t\tcase <-ctx.Done():\n   345→\t\t\t\treturn\n   346→\t\t\tcase <-ticker.C:\n   347→\t\t\t\tstate.mu.Lock()\n   348→\n   349→\t\t\t\tt := time.Now().Add(-d)\n   350→\n   351→\t\t\t\tstate.lastRetentionTime = t.Unix()\n   352→\n   353→\t\t\t\tcclog.Infof(\"[METRICSTORE]> start freeing buffers (older than %s)...\\n\", t.Format(time.RFC3339))\n   354→\n   355→\t\t\t\tfreed, err := Free(ms, t)\n   356→\t\t\t\tif err != nil {\n   357→\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> freeing up buffers failed: %s\\n\", err.Error())\n   358→\t\t\t\t} else {\n   359→\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> done: %d buffers freed\\n\", freed)\n   360→\t\t\t\t}\n   361→\n   362→\t\t\t\tstate.mu.Unlock()\n   363→\n   364→\t\t\t\t// Clean up the buffer pool\n   365→\t\t\t\tbufferPool.Clean(state.lastRetentionTime)\n   366→\t\t\t}\n   367→\t\t}\n   368→\t})\n   369→}\n   370→\n   371→// MemoryUsageTracker starts a background goroutine that monitors memory usage.\n   372→//\n   373→// This worker checks actual process memory usage (via runtime.MemStats) periodically\n   374→// and force-frees buffers if memory exceeds the configured cap. It uses FreeOSMemory()\n   375→// to return memory to the OS after freeing buffers, avoiding aggressive GC that causes\n   376→// performance issues.\n   377→//\n   378→// The tracker logs both actual memory usage (heap allocated) and metric data size for\n   379→// visibility into memory overhead from Go runtime structures and allocations.\n   380→//\n   381→// Parameters:\n   382→//   - wg: WaitGroup to signal completion when context is cancelled\n   383→//   - ctx: Context for cancellation signal\n   384→//\n   385→// The goroutine exits when ctx is cancelled.\n   386→func MemoryUsageTracker(wg *sync.WaitGroup, ctx context.Context) {\n   387→\tms := GetMemoryStore()\n   388→\n   389→\twg.Go(func() {\n   390→\t\tnormalInterval := DefaultMemoryUsageTrackerInterval\n   391→\t\tfastInterval := 30 * time.Second\n   392→\n   393→\t\tif normalInterval <= 0 {\n   394→\t\t\treturn\n   395→\t\t}\n   396→\n   397→\t\tticker := time.NewTicker(normalInterval)\n   398→\t\tdefer ticker.Stop()\n   399→\t\tcurrentInterval := normalInterval"}]},"uuid":"a237a3c1-f371-4a59-b0a5-4159798f6da0","timestamp":"2026-03-24T06:10:01.844Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"0d5e5fa4-cbd8-4ca7-abe6-8cbe7559be64","timestamp":"2026-03-24T06:10:02.007Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"0d5e5fa4-cbd8-4ca7-abe6-8cbe7559be64","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:10:02.023Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_019TKeXJBJgcsoEdVm8Nnt6q","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_011eorDk7DYJv8AHQAHPnsBR","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/taskmanager/taskManager.go","limit":200},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":6,"cache_creation_input_tokens":4334,"cache_read_input_tokens":47423,"cache_creation":{"ephemeral_5m_input_tokens":4334,"ephemeral_1h_input_tokens":0},"output_tokens":3,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQbdwkSAeiNsicdA1PC","uuid":"5ed68223-9309-4f8f-936d-3a23f8d14f9b"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"4647ed2b-42f9-404e-a319-742b88df4b49","timestamp":"2026-03-24T06:10:02.023Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"4647ed2b-42f9-404e-a319-742b88df4b49","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_011eorDk7DYJv8AHQAHPnsBR","type":"tool_result","content":"     1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n     2→// All rights reserved. This file is part of cc-backend.\n     3→// Use of this source code is governed by a MIT-style\n     4→// license that can be found in the LICENSE file.\n     5→\n     6→package taskmanager\n     7→\n     8→import (\n     9→\t\"bytes\"\n    10→\t\"encoding/json\"\n    11→\t\"time\"\n    12→\n    13→\t\"github.com/ClusterCockpit/cc-backend/internal/auth\"\n    14→\t\"github.com/ClusterCockpit/cc-backend/internal/config\"\n    15→\t\"github.com/ClusterCockpit/cc-backend/internal/repository\"\n    16→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n    17→\t\"github.com/go-co-op/gocron/v2\"\n    18→)\n    19→\n    20→const (\n    21→\tDefaultCompressOlderThan = 7\n    22→)\n    23→\n    24→// Retention defines the configuration for job retention policies.\n    25→type Retention struct {\n    26→\tPolicy             string `json:\"policy\"`\n    27→\tFormat             string `json:\"format\"`\n    28→\tAge                int    `json:\"age\"`\n    29→\tIncludeDB          bool   `json:\"include-db\"`\n    30→\tOmitTagged         string `json:\"omit-tagged\"`\n    31→\tTargetKind         string `json:\"target-kind\"`\n    32→\tTargetPath         string `json:\"target-path\"`\n    33→\tTargetEndpoint     string `json:\"target-endpoint\"`\n    34→\tTargetBucket       string `json:\"target-bucket\"`\n    35→\tTargetAccessKey    string `json:\"target-access-key\"`\n    36→\tTargetSecretKey    string `json:\"target-secret-key\"`\n    37→\tTargetRegion       string `json:\"target-region\"`\n    38→\tTargetUsePathStyle bool   `json:\"target-use-path-style\"`\n    39→\tMaxFileSizeMB      int    `json:\"max-file-size-mb\"`\n    40→}\n    41→\n    42→// CronFrequency defines the execution intervals for various background workers.\n    43→type CronFrequency struct {\n    44→\t// Duration Update Worker [Defaults to '2m']\n    45→\tCommitJobWorker string `json:\"commit-job-worker\"`\n    46→\t// Duration Update Worker [Defaults to '5m']\n    47→\tDurationWorker string `json:\"duration-worker\"`\n    48→\t// Metric-Footprint Update Worker [Defaults to '10m']\n    49→\tFootprintWorker string `json:\"footprint-worker\"`\n    50→}\n    51→\n    52→var (\n    53→\ts       gocron.Scheduler\n    54→\tjobRepo *repository.JobRepository\n    55→\t// Keys holds the configured frequencies for cron jobs.\n    56→\tKeys CronFrequency\n    57→)\n    58→\n    59→// parseDuration parses a duration string and handles errors by logging them.\n    60→// It returns the duration and any error encountered.\n    61→func parseDuration(s string) (time.Duration, error) {\n    62→\tinterval, err := time.ParseDuration(s)\n    63→\tif err != nil {\n    64→\t\tcclog.Warnf(\"Could not parse duration for sync interval: %v\",\n    65→\t\t\ts)\n    66→\t\treturn 0, err\n    67→\t}\n    68→\n    69→\tif interval == 0 {\n    70→\t\tcclog.Info(\"TaskManager: Sync interval is zero\")\n    71→\t}\n    72→\n    73→\treturn interval, nil\n    74→}\n    75→\n    76→func initArchiveServices(config json.RawMessage) {\n    77→\tvar cfg struct {\n    78→\t\tRetention   Retention `json:\"retention\"`\n    79→\t\tCompression int       `json:\"compression\"`\n    80→\t}\n    81→\tcfg.Retention.IncludeDB = true\n    82→\n    83→\tif err := json.Unmarshal(config, &cfg); err != nil {\n    84→\t\tcclog.Errorf(\"error while unmarshaling raw config json: %v\", err)\n    85→\t}\n    86→\n    87→\tswitch cfg.Retention.Policy {\n    88→\tcase \"delete\":\n    89→\t\tRegisterRetentionDeleteService(cfg.Retention)\n    90→\tcase \"copy\":\n    91→\t\tRegisterRetentionCopyService(cfg.Retention)\n    92→\tcase \"move\":\n    93→\t\tRegisterRetentionMoveService(cfg.Retention)\n    94→\t}\n    95→\n    96→\tif cfg.Compression > 0 {\n    97→\t\tRegisterCompressionService(cfg.Compression)\n    98→\t} else {\n    99→\t\tRegisterCompressionService(DefaultCompressOlderThan)\n   100→\t}\n   101→}\n   102→\n   103→// Start initializes the task manager, parses configurations, and registers background tasks.\n   104→// It starts the gocron scheduler.\n   105→func Start(cronCfg, archiveConfig json.RawMessage) {\n   106→\tvar err error\n   107→\tjobRepo = repository.GetJobRepository()\n   108→\ts, err = gocron.NewScheduler()\n   109→\tif err != nil {\n   110→\t\tcclog.Abortf(\"Taskmanager Start: Could not create gocron scheduler.\\nError: %s\\n\", err.Error())\n   111→\t}\n   112→\n   113→\tif config.Keys.StopJobsExceedingWalltime > 0 {\n   114→\t\tRegisterStopJobsExceedTime()\n   115→\t}\n   116→\n   117→\tdec := json.NewDecoder(bytes.NewReader(cronCfg))\n   118→\tdec.DisallowUnknownFields()\n   119→\tif err := dec.Decode(&Keys); err != nil {\n   120→\t\tcclog.Errorf(\"error while decoding cron config: %v\", err)\n   121→\t}\n   122→\n   123→\tif archiveConfig != nil {\n   124→\t\tinitArchiveServices(archiveConfig)\n   125→\t} else {\n   126→\t\t// Always enable compression\n   127→\t\tRegisterCompressionService(DefaultCompressOlderThan)\n   128→\t}\n   129→\n   130→\tlc := auth.Keys.LdapConfig\n   131→\n   132→\tif lc != nil && lc.SyncInterval != \"\" {\n   133→\t\tRegisterLdapSyncService(lc.SyncInterval)\n   134→\t}\n   135→\n   136→\tRegisterFootprintWorker()\n   137→\tRegisterUpdateDurationWorker()\n   138→\tRegisterCommitJobService()\n   139→\n   140→\tif config.Keys.NodeStateRetention != nil && config.Keys.NodeStateRetention.Policy != \"\" {\n   141→\t\tinitNodeStateRetention()\n   142→\t}\n   143→\n   144→\ts.Start()\n   145→}\n   146→\n   147→func initNodeStateRetention() {\n   148→\tcfg := config.Keys.NodeStateRetention\n   149→\tage := cfg.Age\n   150→\tif age <= 0 {\n   151→\t\tage = 24\n   152→\t}\n   153→\n   154→\tswitch cfg.Policy {\n   155→\tcase \"delete\":\n   156→\t\tRegisterNodeStateRetentionDeleteService(age)\n   157→\tcase \"move\":\n   158→\t\tRegisterNodeStateRetentionMoveService(cfg)\n   159→\tdefault:\n   160→\t\tcclog.Warnf(\"Unknown nodestate-retention policy: %s\", cfg.Policy)\n   161→\t}\n   162→}\n   163→\n   164→// Shutdown stops the task manager and its scheduler.\n   165→func Shutdown() {\n   166→\tif s != nil {\n   167→\t\ts.Shutdown()\n   168→\t}\n   169→}\n   170→"}]},"uuid":"2507a8b0-8799-411c-9a5d-a15e163cbdbd","timestamp":"2026-03-24T06:10:02.038Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"68841448-dece-4617-84b3-c80dd6b9759b","timestamp":"2026-03-24T06:10:02.039Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"68841448-dece-4617-84b3-c80dd6b9759b","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:10:04.147Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01AvVJ6HfFzLzHhkvQyMdXg4","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_014HbD8mnbGKpLfYtYZjAj2T","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go","limit":200},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":6,"cache_creation_input_tokens":3987,"cache_read_input_tokens":51757,"cache_creation":{"ephemeral_5m_input_tokens":3987,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQbr2Xcn5dVy82TmFGf","uuid":"b0d9c1f4-1906-4a30-8c08-e56a70fb17d3"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"0896b15b-0b26-4c16-a7d9-d6c5f99c4c19","timestamp":"2026-03-24T06:10:04.147Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"0896b15b-0b26-4c16-a7d9-d6c5f99c4c19","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_014HbD8mnbGKpLfYtYZjAj2T","type":"tool_result","content":"     1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n     2→// All rights reserved. This file is part of cc-backend.\n     3→// Use of this source code is governed by a MIT-style\n     4→// license that can be found in the LICENSE file.\n     5→\n     6→// Package metricstore provides walCheckpoint.go: WAL-based checkpoint implementation.\n     7→//\n     8→// This replaces the Avro shadow tree with an append-only Write-Ahead Log (WAL)\n     9→// per host, eliminating the extra memory overhead of the AvroStore and providing\n    10→// truly continuous (per-write) crash safety.\n    11→//\n    12→// # Architecture\n    13→//\n    14→//\tMetric write (DecodeLine)\n    15→//\t      │\n    16→//\t      ├─► WriteToLevel()    → main MemoryStore (unchanged)\n    17→//\t      │\n    18→//\t      └─► WALMessages channel\n    19→//\t               │\n    20→//\t               ▼\n    21→//\t        WALStaging goroutine\n    22→//\t               │\n    23→//\t               ▼\n    24→//\t        checkpoints/cluster/host/current.wal  (append-only, binary)\n    25→//\n    26→//\tPeriodic checkpoint (Checkpointing goroutine):\n    27→//\t  1. Write <timestamp>.bin snapshot (column-oriented, from main tree)\n    28→//\t  2. Signal WALStaging to truncate current.wal per host\n    29→//\n    30→//\tOn restart (FromCheckpoint):\n    31→//\t  1. Load most recent <timestamp>.bin snapshot\n    32→//\t  2. Replay current.wal (overwrite-safe: buffer.write handles duplicate timestamps)\n    33→//\n    34→// # WAL Record Format\n    35→//\n    36→//\t[4B magic 0xCC1DA7A1][4B payload_len][payload][4B CRC32]\n    37→//\n    38→//\tpayload:\n    39→//\t  [8B timestamp int64]\n    40→//\t  [2B metric_name_len uint16][N metric name bytes]\n    41→//\t  [1B selector_count uint8]\n    42→//\t  per selector: [1B selector_len uint8][M selector bytes]\n    43→//\t  [4B value float32 bits]\n    44→//\n    45→// # Binary Snapshot Format\n    46→//\n    47→//\t[4B magic 0xCC5B0001][8B from int64][8B to int64]\n    48→//\tLevel tree (recursive):\n    49→//\t  [4B num_metrics uint32]\n    50→//\t  per metric:\n    51→//\t    [2B name_len uint16][N name bytes]\n    52→//\t    [8B frequency int64][8B start int64]\n    53→//\t    [4B num_values uint32][num_values × 4B float32]\n    54→//\t  [4B num_children uint32]\n    55→//\t  per child: [2B name_len uint16][N name bytes] + Level (recursive)\n    56→package metricstore\n    57→\n    58→import (\n    59→\t\"bufio\"\n    60→\t\"context\"\n    61→\t\"encoding/binary\"\n    62→\t\"fmt\"\n    63→\t\"hash/crc32\"\n    64→\t\"hash/fnv\"\n    65→\t\"io\"\n    66→\t\"math\"\n    67→\t\"os\"\n    68→\t\"path\"\n    69→\t\"strings\"\n    70→\t\"sync\"\n    71→\t\"sync/atomic\"\n    72→\t\"time\"\n    73→\n    74→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n    75→\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n    76→)\n    77→\n    78→// Magic numbers for binary formats.\n    79→const (\n    80→\twalFileMagic   = uint32(0xCC1DA701) // WAL file header magic\n    81→\twalRecordMagic = uint32(0xCC1DA7A1) // WAL record magic\n    82→\tsnapFileMagic  = uint32(0xCC5B0001) // Binary snapshot magic\n    83→)\n    84→\n    85→// walShardChs holds per-shard channels for WAL messages.\n    86→// Initialized by WALStaging; nil when WAL is not active.\n    87→var walShardChs []chan *WALMessage\n    88→\n    89→// walShardRotateChs holds per-shard channels for WAL rotation requests.\n    90→var walShardRotateChs []chan walRotateReq\n    91→\n    92→// walNumShards stores the number of shards (set during WALStaging init).\n    93→var walNumShards int\n    94→\n    95→// WALMessage represents a single metric write to be appended to the WAL.\n    96→// Cluster and Node are NOT stored in the WAL record (inferred from file path).\n    97→type WALMessage struct {\n    98→\tMetricName string\n    99→\tCluster    string\n   100→\tNode       string\n   101→\tSelector   []string\n   102→\tValue      schema.Float\n   103→\tTimestamp  int64\n   104→}\n   105→\n   106→// walRotateReq requests WAL file rotation for a specific host directory.\n   107→// The done channel is closed by the WAL goroutine when rotation is complete.\n   108→type walRotateReq struct {\n   109→\thostDir string\n   110→\tdone    chan struct{}\n   111→}\n   112→\n   113→// walFileState holds an open WAL file handle and buffered writer for one host directory.\n   114→type walFileState struct {\n   115→\tf     *os.File\n   116→\tw     *bufio.Writer\n   117→\tdirty bool\n   118→}\n   119→\n   120→// walFlushInterval controls how often dirty WAL files are flushed to disk.\n   121→// Decoupling flushes from message processing lets the consumer run at memory\n   122→// speed, amortizing syscall overhead across many writes.\n   123→const walFlushInterval = 5 * time.Second\n   124→\n   125→// walShardIndex computes which shard a message belongs to based on cluster+node.\n   126→// Uses FNV-1a hash for fast, well-distributed mapping.\n   127→func walShardIndex(cluster, node string) int {\n   128→\th := fnv.New32a()\n   129→\th.Write([]byte(cluster))\n   130→\th.Write([]byte{0})\n   131→\th.Write([]byte(node))\n   132→\treturn int(h.Sum32()) % walNumShards\n   133→}\n   134→\n   135→// SendWALMessage routes a WAL message to the appropriate shard channel.\n   136→// Returns false if the channel is full (message dropped).\n   137→func SendWALMessage(msg *WALMessage) bool {\n   138→\tif walShardChs == nil {\n   139→\t\treturn false\n   140→\t}\n   141→\tshard := walShardIndex(msg.Cluster, msg.Node)\n   142→\tselect {\n   143→\tcase walShardChs[shard] <- msg:\n   144→\t\treturn true\n   145→\tdefault:\n   146→\t\treturn false\n   147→\t}\n   148→}\n   149→\n   150→// WALStaging starts N sharded background goroutines that receive WALMessage items\n   151→// and append binary WAL records to per-host current.wal files.\n   152→// Each shard owns a subset of hosts (determined by hash of cluster+node),\n   153→// parallelizing serialization and I/O while keeping per-host writes serial.\n   154→func WALStaging(wg *sync.WaitGroup, ctx context.Context) {\n   155→\tif Keys.Checkpoints.FileFormat == \"json\" {\n   156→\t\treturn\n   157→\t}\n   158→\n   159→\twalNumShards = max(Keys.NumWorkers, 1)\n   160→\tchBufSize := max(65536/walNumShards, 1024)\n   161→\n   162→\twalShardChs = make([]chan *WALMessage, walNumShards)\n   163→\twalShardRotateChs = make([]chan walRotateReq, walNumShards)\n   164→\n   165→\tfor i := range walNumShards {\n   166→\t\twalShardChs[i] = make(chan *WALMessage, chBufSize)\n   167→\t\twalShardRotateChs[i] = make(chan walRotateReq, 64)\n   168→\t}\n   169→\n   170→\tfor i := range walNumShards {\n   171→\t\tmsgCh := walShardChs[i]\n   172→\t\trotateCh := walShardRotateChs[i]\n   173→\n   174→\t\twg.Go(func() {\n   175→\t\t\thostFiles := make(map[string]*walFileState)\n   176→\n   177→\t\t\tdefer func() {\n   178→\t\t\t\tfor _, ws := range hostFiles {\n   179→\t\t\t\t\tif ws.f != nil {\n   180→\t\t\t\t\t\tws.w.Flush()\n   181→\t\t\t\t\t\tws.f.Close()\n   182→\t\t\t\t\t}\n   183→\t\t\t\t}\n   184→\t\t\t}()\n   185→\n   186→\t\t\tgetOrOpenWAL := func(hostDir string) *walFileState {\n   187→\t\t\t\tws, ok := hostFiles[hostDir]\n   188→\t\t\t\tif ok {\n   189→\t\t\t\t\treturn ws\n   190→\t\t\t\t}\n   191→\n   192→\t\t\t\tif err := os.MkdirAll(hostDir, CheckpointDirPerms); err != nil {\n   193→\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: mkdir %s: %v\", hostDir, err)\n   194→\t\t\t\t\treturn nil\n   195→\t\t\t\t}\n   196→\n   197→\t\t\t\twalPath := path.Join(hostDir, \"current.wal\")\n   198→\t\t\t\tf, err := os.OpenFile(walPath, os.O_CREATE|os.O_APPEND|os.O_WRONLY, CheckpointFilePerms)\n   199→\t\t\t\tif err != nil {\n   200→\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: open %s: %v\", walPath, err)"}]},"uuid":"d98c425a-65ca-4a12-8bef-85a3f2e38113","timestamp":"2026-03-24T06:10:04.156Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"396a3feb-9a4f-4ecb-b73f-bf9e03a6d4e7","timestamp":"2026-03-24T06:10:04.582Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"396a3feb-9a4f-4ecb-b73f-bf9e03a6d4e7","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:10:04.833Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01AvVJ6HfFzLzHhkvQyMdXg4","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01SXsPhmChfN9ViSzsw81YK4","name":"Grep","input":{"pattern":"WALStaging|walShard|walChan|WALMessage","type":"go","output_mode":"files_with_matches"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":6,"cache_creation_input_tokens":3987,"cache_read_input_tokens":51757,"cache_creation":{"ephemeral_5m_input_tokens":3987,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQbr2Xcn5dVy82TmFGf","uuid":"d6237803-6adb-4fb7-89fe-1ecadd7ff670"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"0127a379-566e-44f8-a744-96a0ee620049","timestamp":"2026-03-24T06:10:04.833Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"0127a379-566e-44f8-a744-96a0ee620049","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01SXsPhmChfN9ViSzsw81YK4","type":"tool_result","content":"Found 3 files\npkg/metricstore/walCheckpoint.go\npkg/metricstore/metricstore.go\npkg/metricstore/lineprotocol.go"}]},"uuid":"fdbf7934-015c-4ec9-8857-f836cae19cd2","timestamp":"2026-03-24T06:10:04.864Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"283447ae-2fd4-433b-bed0-70d1395ca55a","timestamp":"2026-03-24T06:10:04.865Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"283447ae-2fd4-433b-bed0-70d1395ca55a","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:10:06.728Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01UGcGrbq3BojxrkQ37CYzGZ","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01FeSWo3vqLCNCMRhNEua1wn","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go","offset":200,"limit":250},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":6,"cache_creation_input_tokens":3064,"cache_read_input_tokens":55744,"cache_creation":{"ephemeral_5m_input_tokens":3064,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQc4EVhRjhazxWj1tEK","uuid":"7dfcd0e7-a357-48f3-a603-3a517a0e4cc9"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"02487c94-0662-43f6-a08c-f50e1554649a","timestamp":"2026-03-24T06:10:06.729Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"02487c94-0662-43f6-a08c-f50e1554649a","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01FeSWo3vqLCNCMRhNEua1wn","type":"tool_result","content":"   200→\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: open %s: %v\", walPath, err)\n   201→\t\t\t\t\treturn nil\n   202→\t\t\t\t}\n   203→\n   204→\t\t\t\tw := bufio.NewWriter(f)\n   205→\n   206→\t\t\t\t// Write file header magic if file is new (empty).\n   207→\t\t\t\tinfo, err := f.Stat()\n   208→\t\t\t\tif err == nil && info.Size() == 0 {\n   209→\t\t\t\t\tvar hdr [4]byte\n   210→\t\t\t\t\tbinary.LittleEndian.PutUint32(hdr[:], walFileMagic)\n   211→\t\t\t\t\tif _, err := w.Write(hdr[:]); err != nil {\n   212→\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: write header %s: %v\", walPath, err)\n   213→\t\t\t\t\t\tf.Close()\n   214→\t\t\t\t\t\treturn nil\n   215→\t\t\t\t\t}\n   216→\t\t\t\t}\n   217→\n   218→\t\t\t\tws = &walFileState{f: f, w: w}\n   219→\t\t\t\thostFiles[hostDir] = ws\n   220→\t\t\t\treturn ws\n   221→\t\t\t}\n   222→\n   223→\t\t\tprocessMsg := func(msg *WALMessage) {\n   224→\t\t\t\thostDir := path.Join(Keys.Checkpoints.RootDir, msg.Cluster, msg.Node)\n   225→\t\t\t\tws := getOrOpenWAL(hostDir)\n   226→\t\t\t\tif ws == nil {\n   227→\t\t\t\t\treturn\n   228→\t\t\t\t}\n   229→\t\t\t\tif err := writeWALRecordDirect(ws.w, msg); err != nil {\n   230→\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: write record: %v\", err)\n   231→\t\t\t\t}\n   232→\t\t\t\tws.dirty = true\n   233→\t\t\t}\n   234→\n   235→\t\t\tprocessRotate := func(req walRotateReq) {\n   236→\t\t\t\tws, ok := hostFiles[req.hostDir]\n   237→\t\t\t\tif ok && ws.f != nil {\n   238→\t\t\t\t\tws.w.Flush()\n   239→\t\t\t\t\tws.f.Close()\n   240→\t\t\t\t\twalPath := path.Join(req.hostDir, \"current.wal\")\n   241→\t\t\t\t\tif err := os.Remove(walPath); err != nil && !os.IsNotExist(err) {\n   242→\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: remove %s: %v\", walPath, err)\n   243→\t\t\t\t\t}\n   244→\t\t\t\t\tdelete(hostFiles, req.hostDir)\n   245→\t\t\t\t}\n   246→\t\t\t\tclose(req.done)\n   247→\t\t\t}\n   248→\n   249→\t\t\tflushDirty := func() {\n   250→\t\t\t\tfor _, ws := range hostFiles {\n   251→\t\t\t\t\tif ws.dirty {\n   252→\t\t\t\t\t\tws.w.Flush()\n   253→\t\t\t\t\t\tws.dirty = false\n   254→\t\t\t\t\t}\n   255→\t\t\t\t}\n   256→\t\t\t}\n   257→\n   258→\t\t\tdrain := func() {\n   259→\t\t\t\tfor {\n   260→\t\t\t\t\tselect {\n   261→\t\t\t\t\tcase msg, ok := <-msgCh:\n   262→\t\t\t\t\t\tif !ok {\n   263→\t\t\t\t\t\t\treturn\n   264→\t\t\t\t\t\t}\n   265→\t\t\t\t\t\tprocessMsg(msg)\n   266→\t\t\t\t\tcase req := <-rotateCh:\n   267→\t\t\t\t\t\tprocessRotate(req)\n   268→\t\t\t\t\tdefault:\n   269→\t\t\t\t\t\tflushDirty()\n   270→\t\t\t\t\t\treturn\n   271→\t\t\t\t\t}\n   272→\t\t\t\t}\n   273→\t\t\t}\n   274→\n   275→\t\t\tticker := time.NewTicker(walFlushInterval)\n   276→\t\t\tdefer ticker.Stop()\n   277→\n   278→\t\t\t// drainBatch processes up to 4096 pending messages without blocking.\n   279→\t\t\t// Returns false if the channel was closed.\n   280→\t\t\tdrainBatch := func() bool {\n   281→\t\t\t\tfor range 4096 {\n   282→\t\t\t\t\tselect {\n   283→\t\t\t\t\tcase msg, ok := <-msgCh:\n   284→\t\t\t\t\t\tif !ok {\n   285→\t\t\t\t\t\t\tflushDirty()\n   286→\t\t\t\t\t\t\treturn false\n   287→\t\t\t\t\t\t}\n   288→\t\t\t\t\t\tprocessMsg(msg)\n   289→\t\t\t\t\tcase req := <-rotateCh:\n   290→\t\t\t\t\t\tprocessRotate(req)\n   291→\t\t\t\t\tdefault:\n   292→\t\t\t\t\t\treturn true\n   293→\t\t\t\t\t}\n   294→\t\t\t\t}\n   295→\t\t\t\treturn true\n   296→\t\t\t}\n   297→\n   298→\t\t\tfor {\n   299→\t\t\t\tselect {\n   300→\t\t\t\tcase <-ctx.Done():\n   301→\t\t\t\t\tdrain()\n   302→\t\t\t\t\treturn\n   303→\t\t\t\tcase msg, ok := <-msgCh:\n   304→\t\t\t\t\tif !ok {\n   305→\t\t\t\t\t\treturn\n   306→\t\t\t\t\t}\n   307→\t\t\t\t\tprocessMsg(msg)\n   308→\t\t\t\t\tif !drainBatch() {\n   309→\t\t\t\t\t\treturn\n   310→\t\t\t\t\t}\n   311→\t\t\t\t\t// No flush here — timer handles periodic flushing.\n   312→\t\t\t\tcase <-ticker.C:\n   313→\t\t\t\t\tflushDirty()\n   314→\t\t\t\tcase req := <-rotateCh:\n   315→\t\t\t\t\tprocessRotate(req)\n   316→\t\t\t\t}\n   317→\t\t\t}\n   318→\t\t})\n   319→\t}\n   320→}\n   321→\n   322→// RotateWALFiles sends rotation requests for the given host directories\n   323→// and blocks until all rotations complete. Each request is routed to the\n   324→// shard that owns the host directory.\n   325→func RotateWALFiles(hostDirs []string) {\n   326→\tif walShardRotateChs == nil {\n   327→\t\treturn\n   328→\t}\n   329→\tdones := make([]chan struct{}, len(hostDirs))\n   330→\tfor i, dir := range hostDirs {\n   331→\t\tdones[i] = make(chan struct{})\n   332→\t\t// Extract cluster/node from hostDir to find the right shard.\n   333→\t\t// hostDir = rootDir/cluster/node\n   334→\t\tshard := walShardIndexFromDir(dir)\n   335→\t\twalShardRotateChs[shard] <- walRotateReq{hostDir: dir, done: dones[i]}\n   336→\t}\n   337→\tfor _, done := range dones {\n   338→\t\t<-done\n   339→\t}\n   340→}\n   341→\n   342→// walShardIndexFromDir extracts cluster and node from a host directory path\n   343→// and returns the shard index. The path format is: rootDir/cluster/node\n   344→func walShardIndexFromDir(hostDir string) int {\n   345→\t// hostDir = .../cluster/node — extract last two path components\n   346→\tnode := path.Base(hostDir)\n   347→\tcluster := path.Base(path.Dir(hostDir))\n   348→\treturn walShardIndex(cluster, node)\n   349→}\n   350→\n   351→// RotateWALFiles sends rotation requests for the given host directories\n   352→// and blocks until all rotations complete.\n   353→func RotateWALFilesAfterShutdown(hostDirs []string) {\n   354→\tfor _, dir := range hostDirs {\n   355→\t\twalPath := path.Join(dir, \"current.wal\")\n   356→\t\tif err := os.Remove(walPath); err != nil && !os.IsNotExist(err) {\n   357→\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: remove %s: %v\", walPath, err)\n   358→\t\t}\n   359→\t}\n   360→}\n   361→\n   362→// writeWALRecordDirect encodes a WAL record directly into the bufio.Writer,\n   363→// avoiding heap allocations by using a stack-allocated scratch buffer for\n   364→// the fixed-size header/trailer and computing CRC inline.\n   365→func writeWALRecordDirect(w *bufio.Writer, msg *WALMessage) error {\n   366→\t// Compute payload size.\n   367→\tpayloadSize := 8 + 2 + len(msg.MetricName) + 1 + 4\n   368→\tfor _, s := range msg.Selector {\n   369→\t\tpayloadSize += 1 + len(s)\n   370→\t}\n   371→\n   372→\t// Write magic + payload length (8 bytes header).\n   373→\tvar hdr [8]byte\n   374→\tbinary.LittleEndian.PutUint32(hdr[0:4], walRecordMagic)\n   375→\tbinary.LittleEndian.PutUint32(hdr[4:8], uint32(payloadSize))\n   376→\tif _, err := w.Write(hdr[:]); err != nil {\n   377→\t\treturn err\n   378→\t}\n   379→\n   380→\t// We need to compute CRC over the payload as we write it.\n   381→\tcrc := crc32.NewIEEE()\n   382→\n   383→\t// Timestamp (8 bytes).\n   384→\tvar scratch [8]byte\n   385→\tbinary.LittleEndian.PutUint64(scratch[:8], uint64(msg.Timestamp))\n   386→\tcrc.Write(scratch[:8])\n   387→\tif _, err := w.Write(scratch[:8]); err != nil {\n   388→\t\treturn err\n   389→\t}\n   390→\n   391→\t// Metric name length (2 bytes) + metric name.\n   392→\tbinary.LittleEndian.PutUint16(scratch[:2], uint16(len(msg.MetricName)))\n   393→\tcrc.Write(scratch[:2])\n   394→\tif _, err := w.Write(scratch[:2]); err != nil {\n   395→\t\treturn err\n   396→\t}\n   397→\tnameBytes := []byte(msg.MetricName)\n   398→\tcrc.Write(nameBytes)\n   399→\tif _, err := w.Write(nameBytes); err != nil {\n   400→\t\treturn err\n   401→\t}\n   402→\n   403→\t// Selector count (1 byte).\n   404→\tscratch[0] = byte(len(msg.Selector))\n   405→\tcrc.Write(scratch[:1])\n   406→\tif _, err := w.Write(scratch[:1]); err != nil {\n   407→\t\treturn err\n   408→\t}\n   409→\n   410→\t// Selectors (1-byte length + bytes each).\n   411→\tfor _, sel := range msg.Selector {\n   412→\t\tscratch[0] = byte(len(sel))\n   413→\t\tcrc.Write(scratch[:1])\n   414→\t\tif _, err := w.Write(scratch[:1]); err != nil {\n   415→\t\t\treturn err\n   416→\t\t}\n   417→\t\tselBytes := []byte(sel)\n   418→\t\tcrc.Write(selBytes)\n   419→\t\tif _, err := w.Write(selBytes); err != nil {\n   420→\t\t\treturn err\n   421→\t\t}\n   422→\t}\n   423→\n   424→\t// Value (4 bytes, float32 bits).\n   425→\tbinary.LittleEndian.PutUint32(scratch[:4], math.Float32bits(float32(msg.Value)))\n   426→\tcrc.Write(scratch[:4])\n   427→\tif _, err := w.Write(scratch[:4]); err != nil {\n   428→\t\treturn err\n   429→\t}\n   430→\n   431→\t// CRC32 (4 bytes).\n   432→\tbinary.LittleEndian.PutUint32(scratch[:4], crc.Sum32())\n   433→\t_, err := w.Write(scratch[:4])\n   434→\treturn err\n   435→}\n   436→\n   437→// readWALRecord reads one WAL record from the reader.\n   438→// Returns (nil, nil) on clean EOF. Returns error on data corruption.\n   439→// A CRC mismatch indicates a truncated trailing record (expected on crash).\n   440→func readWALRecord(r io.Reader) (*WALMessage, error) {\n   441→\tvar magic uint32\n   442→\tif err := binary.Read(r, binary.LittleEndian, &magic); err != nil {\n   443→\t\tif err == io.EOF {\n   444→\t\t\treturn nil, nil // Clean EOF\n   445→\t\t}\n   446→\t\treturn nil, fmt.Errorf(\"read record magic: %w\", err)\n   447→\t}\n   448→\n   449→\tif magic != walRecordMagic {"}]},"uuid":"cff0189a-7fbf-452b-b7d1-c3e989ca111f","timestamp":"2026-03-24T06:10:06.739Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"6de3d667-ddef-4eab-8898-25f2d328710e","timestamp":"2026-03-24T06:10:06.945Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"6de3d667-ddef-4eab-8898-25f2d328710e","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:10:06.964Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01UGcGrbq3BojxrkQ37CYzGZ","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01Ej7xhBGn1qGUC5e6361jYv","name":"Bash","input":{"command":"git log --oneline --all -20"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":6,"cache_creation_input_tokens":3064,"cache_read_input_tokens":55744,"cache_creation":{"ephemeral_5m_input_tokens":3064,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQc4EVhRjhazxWj1tEK","uuid":"73d15f78-00fa-40ec-bd25-2cff18cf6cf0"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"21a26472-0a7a-4b8f-8f65-91ec423d0787","timestamp":"2026-03-24T06:10:06.965Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"21a26472-0a7a-4b8f-8f65-91ec423d0787","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01Ej7xhBGn1qGUC5e6361jYv","type":"tool_result","content":"889b284f Checkpoint: ed68d32218ac\n6f7dda53 Cleanup\nbc9c47cd Checkpoint: ddd40d290c56\n0325d9e8 fix: Increase throughput for WAL writers\nc13fd68a Merge pull request #534 from ClusterCockpit/hotfix\n3d94b0bf Merge branch 'master' into hotfix\nd5ea2b4c change: query node states explicitly in node view\n7c42fc3a Checkpoint: 29b9d52db89c\n45f329e5 feat: Add command line switch to trigger manual metricstore checkpoint cleanup\n100dd7da Merge pull request #533 from ClusterCockpit/hotfix\n493cee05 Checkpoint: ccda3b2ff4cb\n192c94a7 fix: Prevent interruption of body lineprotocol parsing on locks\n40142966 Checkpoint: 6000eb5a5bb8\ne41d1251 fix: Continue on error\n1abea621 Checkpoint: 1660b8cf2571\n586c9020 Restructure metricstore cleanup archiving to stay withinh 32k parquet-go limit\n38f75ceb Checkpoint: 1660b8cf2571\n7297f7f3 Merge remote session logs\n01ec70ba Iterate over subCluster MetricConfig directly so that removed metrics are not included\n92189ea9 Checkpoint: efb6f0a96069","is_error":false}]},"uuid":"10e863f1-2723-4887-afe7-a9dad39ca73f","timestamp":"2026-03-24T06:10:07.020Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"47565ddd-9cdf-4160-b023-3a41c41d3051","timestamp":"2026-03-24T06:10:07.020Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"47565ddd-9cdf-4160-b023-3a41c41d3051","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:10:08.673Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01CAa9TiWnPU35g5QMaKZSr1","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01YWBkBVawaSE7pN4XhmQwMw","name":"Bash","input":{"command":"git show 0325d9e8 --stat"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":6,"cache_creation_input_tokens":4080,"cache_read_input_tokens":58808,"cache_creation":{"ephemeral_5m_input_tokens":4080,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQcDJx247e5iJ2g2to1","uuid":"acc154fa-d542-497c-b252-b8fe5885ab05"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"59d079cf-2408-4928-9a40-9fb964b0b4aa","timestamp":"2026-03-24T06:10:08.674Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"59d079cf-2408-4928-9a40-9fb964b0b4aa","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01YWBkBVawaSE7pN4XhmQwMw","type":"tool_result","content":"commit 0325d9e866ec97994e77770ca189838c0ee3b3f0\nAuthor: Jan Eitzinger <jan@moebiusband.org>\nDate:   Tue Mar 24 06:53:12 2026 +0100\n\n    fix: Increase throughput for WAL writers\n    \n    Entire-Checkpoint: ddd40d290c56\n\n pkg/metricstore/walCheckpoint.go | 63 ++++++++++++++++++++++++++--------------\n 1 file changed, 42 insertions(+), 21 deletions(-)","is_error":false}]},"uuid":"642e9c65-3a37-4abe-a4ed-1261b86830c0","timestamp":"2026-03-24T06:10:08.720Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"13eb04ec-e70e-4dec-8cef-e1cf7d0131e5","timestamp":"2026-03-24T06:10:08.766Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"13eb04ec-e70e-4dec-8cef-e1cf7d0131e5","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:10:09.893Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_0172q3gpupKtiMjecEKMF8SJ","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01YWtW1ZJMtW6B96rScPk5Ua","name":"Bash","input":{"command":"git show 0325d9e8"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":4,"cache_creation_input_tokens":291,"cache_read_input_tokens":62888,"cache_creation":{"ephemeral_5m_input_tokens":291,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQcLoQHGvUaVn56mdR9","uuid":"981467a9-5be7-41bf-9de9-38db8d6c9c1c"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"26bbc7e4-a918-440e-949f-5312ae757fac","timestamp":"2026-03-24T06:10:09.893Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"26bbc7e4-a918-440e-949f-5312ae757fac","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01YWtW1ZJMtW6B96rScPk5Ua","type":"tool_result","content":"commit 0325d9e866ec97994e77770ca189838c0ee3b3f0\nAuthor: Jan Eitzinger <jan@moebiusband.org>\nDate:   Tue Mar 24 06:53:12 2026 +0100\n\n    fix: Increase throughput for WAL writers\n    \n    Entire-Checkpoint: ddd40d290c56\n\ndiff --git a/pkg/metricstore/walCheckpoint.go b/pkg/metricstore/walCheckpoint.go\nindex 38585cf5..85e5047e 100644\n--- a/pkg/metricstore/walCheckpoint.go\n+++ b/pkg/metricstore/walCheckpoint.go\n@@ -69,6 +69,7 @@ import (\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@@ -111,10 +112,16 @@ type walRotateReq struct {\n \n // walFileState holds an open WAL file handle and buffered writer for one host directory.\n type walFileState struct {\n-\tf *os.File\n-\tw *bufio.Writer\n+\tf     *os.File\n+\tw     *bufio.Writer\n+\tdirty bool\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.\n+const walFlushInterval = 5 * 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.\n func walShardIndex(cluster, node string) int {\n@@ -222,6 +229,7 @@ func WALStaging(wg *sync.WaitGroup, ctx context.Context) {\n \t\t\t\tif err := writeWALRecordDirect(ws.w, msg); 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.dirty = true\n \t\t\t}\n \n \t\t\tprocessRotate := func(req walRotateReq) {\n@@ -238,10 +246,11 @@ func WALStaging(wg *sync.WaitGroup, ctx context.Context) {\n \t\t\t\tclose(req.done)\n \t\t\t}\n \n-\t\t\tflushAll := func() {\n+\t\t\tflushDirty := func() {\n \t\t\t\tfor _, ws := range hostFiles {\n-\t\t\t\t\tif ws.f != nil {\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@@ -257,12 +266,35 @@ func WALStaging(wg *sync.WaitGroup, ctx context.Context) {\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\tflushAll()\n+\t\t\t\t\t\tflushDirty()\n \t\t\t\t\t\treturn\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@@ -273,23 +305,12 @@ func WALStaging(wg *sync.WaitGroup, ctx context.Context) {\n \t\t\t\t\t\treturn\n \t\t\t\t\t}\n \t\t\t\t\tprocessMsg(msg)\n-\n-\t\t\t\t\t// Drain up to 256 more messages without blocking to batch writes.\n-\t\t\t\t\tfor range 256 {\n-\t\t\t\t\t\tselect {\n-\t\t\t\t\t\tcase msg, ok := <-msgCh:\n-\t\t\t\t\t\t\tif !ok {\n-\t\t\t\t\t\t\t\treturn\n-\t\t\t\t\t\t\t}\n-\t\t\t\t\t\t\tprocessMsg(msg)\n-\t\t\t\t\t\tcase req := <-rotateCh:\n-\t\t\t\t\t\t\tprocessRotate(req)\n-\t\t\t\t\t\tdefault:\n-\t\t\t\t\t\t\tgoto flushed\n-\t\t\t\t\t\t}\n+\t\t\t\t\tif !drainBatch() {\n+\t\t\t\t\t\treturn\n \t\t\t\t\t}\n-\t\t\t\tflushed:\n-\t\t\t\t\tflushAll()\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}","is_error":false}]},"uuid":"f832ac34-e110-47ff-a0c0-73d2a02c8e9a","timestamp":"2026-03-24T06:10:09.937Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"1f8a8129-f845-4af7-a317-d625aa5ae31b","timestamp":"2026-03-24T06:10:09.937Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"1f8a8129-f845-4af7-a317-d625aa5ae31b","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:10:11.825Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_0192h436SVScN1RMXgd84uUL","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01Biam2QiyvNQxJdes7US2CK","name":"Grep","input":{"pattern":"func Checkpointing|checkpoint.*timeout|shutdown.*timeout","type":"go","context":5},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":3,"cache_creation_input_tokens":1532,"cache_read_input_tokens":63179,"cache_creation":{"ephemeral_5m_input_tokens":1532,"ephemeral_1h_input_tokens":0},"output_tokens":4,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQcRrWQiZR9U5Kxz9Zb","uuid":"788872d9-7639-4734-9233-91de94292e13"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"560db1f4-deeb-4b6f-8131-7e168539b9e1","timestamp":"2026-03-24T06:10:11.825Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"560db1f4-deeb-4b6f-8131-7e168539b9e1","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01Biam2QiyvNQxJdes7US2CK","type":"tool_result","content":"Found 6 files\ninternal/api/api_test.go\ninternal/archiver/archiver.go\ncmd/cc-backend/server.go\npkg/metricstore/checkpoint.go\ninternal/archiver/archiveWorker.go\ninternal/api/nats_test.go"}]},"uuid":"4f4bad52-5856-48a9-a284-a5adf5c7cb79","timestamp":"2026-03-24T06:10:11.846Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"bf03a3ec-7c89-4f08-92d4-41fc2918475d","timestamp":"2026-03-24T06:10:12.268Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"bf03a3ec-7c89-4f08-92d4-41fc2918475d","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:10:12.301Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_0192h436SVScN1RMXgd84uUL","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01RVpCa3nS83nHyYTa9jzsfL","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/checkpoint.go","limit":200},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":3,"cache_creation_input_tokens":1532,"cache_read_input_tokens":63179,"cache_creation":{"ephemeral_5m_input_tokens":1532,"ephemeral_1h_input_tokens":0},"output_tokens":4,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQcRrWQiZR9U5Kxz9Zb","uuid":"82470ec8-2458-4b46-9402-2d5c54ccee6c"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"2c1d7e09-f3a8-4a79-9ae0-9d78bce5fa41","timestamp":"2026-03-24T06:10:12.302Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"2c1d7e09-f3a8-4a79-9ae0-9d78bce5fa41","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01RVpCa3nS83nHyYTa9jzsfL","type":"tool_result","content":"     1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n     2→// All rights reserved. This file is part of cc-backend.\n     3→// Use of this source code is governed by a MIT-style\n     4→// license that can be found in the LICENSE file.\n     5→\n     6→// This file implements checkpoint persistence for the in-memory metric store.\n     7→//\n     8→// Checkpoints enable graceful restarts by periodically saving in-memory metric\n     9→// data to disk in JSON or binary format. The checkpoint system:\n    10→//\n    11→// Key Features:\n    12→//   - Periodic background checkpointing via the Checkpointing() worker\n    13→//   - Two format families: JSON (human-readable) and WAL+binary (compact, crash-safe)\n    14→//   - Parallel checkpoint creation and loading using worker pools\n    15→//   - Hierarchical file organization: checkpoint_dir/cluster/host/timestamp.{json|bin}\n    16→//   - WAL file: checkpoint_dir/cluster/host/current.wal (append-only, per-entry)\n    17→//   - Only saves unarchived data (archived data is already persisted elsewhere)\n    18→//   - GC optimization during loading to prevent excessive heap growth\n    19→//\n    20→// Checkpoint Workflow:\n    21→//  1. Init() loads checkpoints within retention window at startup\n    22→//  2. Checkpointing() worker periodically saves new data\n    23→//  3. Shutdown() writes final checkpoint before exit\n    24→//\n    25→// File Organization:\n    26→//\n    27→//\tcheckpoints/\n    28→//\t  cluster1/\n    29→//\t    host001/\n    30→//\t      1234567890.json  (JSON format: full subtree snapshot)\n    31→//\t      1234567890.bin   (binary format: full subtree snapshot)\n    32→//\t      current.wal      (WAL format: append-only per-entry log)\n    33→//\t    host002/\n    34→//\t      ...\n    35→package metricstore\n    36→\n    37→import (\n    38→\t\"bufio\"\n    39→\t\"context\"\n    40→\t\"encoding/json\"\n    41→\t\"errors\"\n    42→\t\"fmt\"\n    43→\t\"io/fs\"\n    44→\t\"os\"\n    45→\t\"path\"\n    46→\t\"path/filepath\"\n    47→\t\"sort\"\n    48→\t\"strconv\"\n    49→\t\"strings\"\n    50→\t\"sync\"\n    51→\t\"sync/atomic\"\n    52→\t\"time\"\n    53→\n    54→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n    55→\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n    56→)\n    57→\n    58→const (\n    59→\tCheckpointFilePerms = 0o644                    // File permissions for checkpoint files\n    60→\tCheckpointDirPerms  = 0o755                    // Directory permissions for checkpoint directories\n    61→\tGCTriggerInterval   = DefaultGCTriggerInterval // Interval for triggering GC during checkpoint loading\n    62→)\n    63→\n    64→// CheckpointMetrics represents metric data in a checkpoint file.\n    65→// Whenever the structure changes, update MarshalJSON as well!\n    66→type CheckpointMetrics struct {\n    67→\tData      []schema.Float `json:\"data\"`\n    68→\tFrequency int64          `json:\"frequency\"`\n    69→\tStart     int64          `json:\"start\"`\n    70→}\n    71→\n    72→// CheckpointFile represents the hierarchical structure of a checkpoint file.\n    73→// It mirrors the Level tree structure from the MemoryStore.\n    74→type CheckpointFile struct {\n    75→\tMetrics  map[string]*CheckpointMetrics `json:\"metrics\"`\n    76→\tChildren map[string]*CheckpointFile    `json:\"children\"`\n    77→\tFrom     int64                         `json:\"from\"`\n    78→\tTo       int64                         `json:\"to\"`\n    79→}\n    80→\n    81→// lastCheckpoint tracks the timestamp of the last checkpoint creation.\n    82→var (\n    83→\tlastCheckpoint   time.Time\n    84→\tlastCheckpointMu sync.Mutex\n    85→)\n    86→\n    87→// Checkpointing starts a background worker that periodically saves metric data to disk.\n    88→//\n    89→// Checkpoints are written every 12 hours (hardcoded).\n    90→//\n    91→// Format behaviour:\n    92→//   - \"json\": Periodic checkpointing every checkpointInterval\n    93→//   - \"wal\":  Periodic binary snapshots + WAL rotation every checkpointInterval\n    94→func Checkpointing(wg *sync.WaitGroup, ctx context.Context) {\n    95→\tlastCheckpointMu.Lock()\n    96→\tlastCheckpoint = time.Now()\n    97→\tlastCheckpointMu.Unlock()\n    98→\n    99→\tms := GetMemoryStore()\n   100→\n   101→\twg.Go(func() {\n   102→\n   103→\t\td := 12 * time.Hour // default checkpoint interval\n   104→\t\tif Keys.CheckpointInterval != \"\" {\n   105→\t\t\tparsed, err := time.ParseDuration(Keys.CheckpointInterval)\n   106→\t\t\tif err != nil {\n   107→\t\t\t\tcclog.Errorf(\"[METRICSTORE]> invalid checkpoint-interval %q: %s, using default 12h\", Keys.CheckpointInterval, err)\n   108→\t\t\t} else {\n   109→\t\t\t\td = parsed\n   110→\t\t\t}\n   111→\t\t}\n   112→\n   113→\t\tticker := time.NewTicker(d)\n   114→\t\tdefer ticker.Stop()\n   115→\n   116→\t\tfor {\n   117→\t\t\tselect {\n   118→\t\t\tcase <-ctx.Done():\n   119→\t\t\t\treturn\n   120→\t\t\tcase <-ticker.C:\n   121→\t\t\t\tlastCheckpointMu.Lock()\n   122→\t\t\t\tfrom := lastCheckpoint\n   123→\t\t\t\tlastCheckpointMu.Unlock()\n   124→\n   125→\t\t\t\tnow := time.Now()\n   126→\t\t\t\tcclog.Infof(\"[METRICSTORE]> start checkpointing (starting at %s)...\", from.Format(time.RFC3339))\n   127→\n   128→\t\t\t\tif Keys.Checkpoints.FileFormat == \"wal\" {\n   129→\t\t\t\t\tn, hostDirs, err := ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), now.Unix())\n   130→\t\t\t\t\tif err != nil {\n   131→\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> binary checkpointing failed: %s\", err.Error())\n   132→\t\t\t\t\t} else {\n   133→\t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> done: %d binary snapshot files created\", n)\n   134→\t\t\t\t\t\tlastCheckpointMu.Lock()\n   135→\t\t\t\t\t\tlastCheckpoint = now\n   136→\t\t\t\t\t\tlastCheckpointMu.Unlock()\n   137→\t\t\t\t\t\t// Rotate WAL files for successfully checkpointed hosts.\n   138→\t\t\t\t\t\tRotateWALFiles(hostDirs)\n   139→\t\t\t\t\t}\n   140→\t\t\t\t} else {\n   141→\t\t\t\t\tn, err := ms.ToCheckpoint(Keys.Checkpoints.RootDir, from.Unix(), now.Unix())\n   142→\t\t\t\t\tif err != nil {\n   143→\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> checkpointing failed: %s\", err.Error())\n   144→\t\t\t\t\t} else {\n   145→\t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> done: %d checkpoint files created\", n)\n   146→\t\t\t\t\t\tlastCheckpointMu.Lock()\n   147→\t\t\t\t\t\tlastCheckpoint = now\n   148→\t\t\t\t\t\tlastCheckpointMu.Unlock()\n   149→\t\t\t\t\t}\n   150→\t\t\t\t}\n   151→\t\t\t}\n   152→\t\t}\n   153→\t})\n   154→}\n   155→\n   156→// MarshalJSON provides optimized JSON encoding for CheckpointMetrics.\n   157→//\n   158→// Since schema.Float has custom MarshalJSON, serializing []Float has significant overhead.\n   159→// This method manually constructs JSON to avoid allocations and interface conversions.\n   160→func (cm *CheckpointMetrics) MarshalJSON() ([]byte, error) {\n   161→\tbuf := make([]byte, 0, 128+len(cm.Data)*8)\n   162→\tbuf = append(buf, `{\"frequency\":`...)\n   163→\tbuf = strconv.AppendInt(buf, cm.Frequency, 10)\n   164→\tbuf = append(buf, `,\"start\":`...)\n   165→\tbuf = strconv.AppendInt(buf, cm.Start, 10)\n   166→\tbuf = append(buf, `,\"data\":[`...)\n   167→\tfor i, x := range cm.Data {\n   168→\t\tif i != 0 {\n   169→\t\t\tbuf = append(buf, ',')\n   170→\t\t}\n   171→\t\tif x.IsNaN() {\n   172→\t\t\tbuf = append(buf, `null`...)\n   173→\t\t} else {\n   174→\t\t\tbuf = strconv.AppendFloat(buf, float64(x), 'f', 1, 32)\n   175→\t\t}\n   176→\t}\n   177→\tbuf = append(buf, `]}`...)\n   178→\treturn buf, nil\n   179→}\n   180→\n   181→// ToCheckpoint writes metric data to checkpoint files in parallel (JSON format).\n   182→//\n   183→// Metrics at root and cluster levels are skipped. One file per host is created.\n   184→// Uses worker pool (Keys.NumWorkers) for parallel processing. Only locks one host\n   185→// at a time, allowing concurrent writes/reads to other hosts.\n   186→//\n   187→// Returns the number of checkpoint files created and any errors encountered.\n   188→func (m *MemoryStore) ToCheckpoint(dir string, from, to int64) (int, error) {\n   189→\t// Pre-calculate capacity by counting cluster/host pairs\n   190→\tm.root.lock.RLock()\n   191→\ttotalHosts := 0\n   192→\tfor _, l1 := range m.root.children {\n   193→\t\tl1.lock.RLock()\n   194→\t\ttotalHosts += len(l1.children)\n   195→\t\tl1.lock.RUnlock()\n   196→\t}\n   197→\tm.root.lock.RUnlock()\n   198→\n   199→\tlevels := make([]*Level, 0, totalHosts)\n   200→\tselectors := make([][]string, 0, totalHosts)"}]},"uuid":"86964aab-2ebe-4a0e-87ce-616b9954ce27","timestamp":"2026-03-24T06:10:12.307Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"63e54258-f12d-48c5-af62-b958077019d9","timestamp":"2026-03-24T06:10:12.321Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"63e54258-f12d-48c5-af62-b958077019d9","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:10:14.441Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01TPTupYyNG4Vgr8Lx2phzav","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01LBn6Gz48ad96HeHJRsK1uG","name":"Bash","input":{"command":"grep -n \"RotateWALFiles\\|drain\\|select.*ctx.Done\" /Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go | head -40"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":4,"cache_creation_input_tokens":3364,"cache_read_input_tokens":64711,"cache_creation":{"ephemeral_5m_input_tokens":3364,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQcbyDbBvEjiKjvYkkD","uuid":"9c44c385-4086-4936-a884-d5bc6cd4b9a7"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"a9b82c44-dd4c-454b-8689-1d514fab4292","timestamp":"2026-03-24T06:10:14.442Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"a9b82c44-dd4c-454b-8689-1d514fab4292","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01LBn6Gz48ad96HeHJRsK1uG","type":"tool_result","content":"258:\t\t\tdrain := func() {\n278:\t\t\t// drainBatch processes up to 4096 pending messages without blocking.\n280:\t\t\tdrainBatch := func() bool {\n301:\t\t\t\t\tdrain()\n308:\t\t\t\t\tif !drainBatch() {\n322:// RotateWALFiles sends rotation requests for the given host directories\n325:func RotateWALFiles(hostDirs []string) {\n351:// RotateWALFiles sends rotation requests for the given host directories\n353:func RotateWALFilesAfterShutdown(hostDirs []string) {","is_error":false}]},"uuid":"76f68b68-6864-4a95-a5ea-f90de0e14f91","timestamp":"2026-03-24T06:10:14.474Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"fd1932e8-3139-449d-b0df-57abc2724038","timestamp":"2026-03-24T06:10:14.475Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"fd1932e8-3139-449d-b0df-57abc2724038","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:10:16.098Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01PrvKXrLUbPh7hVv8JA6G8F","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_011y91GhPhZ4QGmoybakE1QA","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go","offset":273,"limit":50},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":323,"cache_read_input_tokens":68075,"cache_creation":{"ephemeral_5m_input_tokens":323,"ephemeral_1h_input_tokens":0},"output_tokens":4,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQcmANBxAa5Pn6Fe669","uuid":"ea6ac2f2-c1fd-4c1a-b910-e910ae69bf45"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"6b5cadec-4606-4749-9f70-85b0a19af388","timestamp":"2026-03-24T06:10:16.098Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"6b5cadec-4606-4749-9f70-85b0a19af388","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_011y91GhPhZ4QGmoybakE1QA","type":"tool_result","content":"   273→func Shutdown() {\n   274→\tshutdownFuncMu.Lock()\n   275→\tdefer shutdownFuncMu.Unlock()\n   276→\tif shutdownFunc != nil {\n   277→\t\tshutdownFunc()\n   278→\t}\n   279→\n   280→\tif Keys.Checkpoints.FileFormat == \"wal\" {\n   281→\t\tfor _, ch := range walShardChs {\n   282→\t\t\tclose(ch)\n   283→\t\t}\n   284→\t}\n   285→\n   286→\tcclog.Infof(\"[METRICSTORE]> Writing to '%s'...\\n\", Keys.Checkpoints.RootDir)\n   287→\tvar files int\n   288→\tvar err error\n   289→\n   290→\tms := GetMemoryStore()\n   291→\n   292→\tlastCheckpointMu.Lock()\n   293→\tfrom := lastCheckpoint\n   294→\tlastCheckpointMu.Unlock()\n   295→\n   296→\tif Keys.Checkpoints.FileFormat == \"wal\" {\n   297→\t\tvar hostDirs []string\n   298→\t\tfiles, hostDirs, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n   299→\t\tif err == nil {\n   300→\t\t\tRotateWALFilesAfterShutdown(hostDirs)\n   301→\t\t}\n   302→\t} else {\n   303→\t\tfiles, err = ms.ToCheckpoint(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n   304→\t}\n   305→\n   306→\tif err != nil {\n   307→\t\tcclog.Errorf(\"[METRICSTORE]> Writing checkpoint failed: %s\\n\", err.Error())\n   308→\t}\n   309→\tcclog.Infof(\"[METRICSTORE]> Done! (%d files written)\\n\", files)\n   310→}\n   311→\n   312→// Retention starts a background goroutine that periodically frees old metric data.\n   313→//\n   314→// This worker runs at half the retention interval and calls Free() to remove buffers\n   315→// older than the configured retention time. It respects the NodeProvider to preserve\n   316→// data for nodes with active jobs.\n   317→//\n   318→// Parameters:\n   319→//   - wg: WaitGroup to signal completion when context is cancelled\n   320→//   - ctx: Context for cancellation signal\n   321→//\n   322→// The goroutine exits when ctx is cancelled."}]},"uuid":"f1f21092-cc96-478d-a887-a6d50f2706d5","timestamp":"2026-03-24T06:10:16.108Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"9ce8dee6-54df-4a36-8499-a964c2d71232","timestamp":"2026-03-24T06:10:16.364Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"9ce8dee6-54df-4a36-8499-a964c2d71232","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:10:16.388Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01PrvKXrLUbPh7hVv8JA6G8F","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01KuvjffTHhKymfMrnsuyehq","name":"Bash","input":{"command":"grep -n \"RotateWALFiles\\|ToCheckpointWAL\\|close(ch)\" /Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go | head -20"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":323,"cache_read_input_tokens":68075,"cache_creation":{"ephemeral_5m_input_tokens":323,"ephemeral_1h_input_tokens":0},"output_tokens":4,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQcmANBxAa5Pn6Fe669","uuid":"8daefed1-cd34-4f72-b978-97bbc7e93049"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"154907fe-dab1-4711-9998-fdb5694cbcaf","timestamp":"2026-03-24T06:10:16.388Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"154907fe-dab1-4711-9998-fdb5694cbcaf","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01KuvjffTHhKymfMrnsuyehq","type":"tool_result","content":"282:\t\t\tclose(ch)\n298:\t\tfiles, hostDirs, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n300:\t\t\tRotateWALFilesAfterShutdown(hostDirs)","is_error":false}]},"uuid":"b9cb4aa3-ecd2-4629-8803-15cb4a2aa83b","timestamp":"2026-03-24T06:10:16.409Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"0074b1a4-680f-446b-8aca-4f6f7456c54a","timestamp":"2026-03-24T06:10:16.410Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"0074b1a4-680f-446b-8aca-4f6f7456c54a","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:10:18.290Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01WHPo4SiRbptoB4bmEYyHFC","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01FThjVupGjhRuLoqG2ezbVe","name":"Bash","input":{"command":"grep -n \"func (m \\*MemoryStore) ToCheckpointWAL\\|func.*ToCheckpoint\" /Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/*.go"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":3,"cache_creation_input_tokens":1292,"cache_read_input_tokens":68398,"cache_creation":{"ephemeral_5m_input_tokens":1292,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQcuZ8xJotay9so9Vu2","uuid":"4c73f6da-a62c-44a5-8ce2-e0be0b1c3617"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"4679f84e-e289-45e5-a4d0-86dd093864c3","timestamp":"2026-03-24T06:10:18.290Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"4679f84e-e289-45e5-a4d0-86dd093864c3","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01FThjVupGjhRuLoqG2ezbVe","type":"tool_result","content":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/checkpoint.go:188:func (m *MemoryStore) ToCheckpoint(dir string, from, to int64) (int, error) {\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go:627:func (m *MemoryStore) ToCheckpointWAL(dir string, from, to int64) (int, []string, error) {","is_error":false}]},"uuid":"73f7ee7c-96b5-4f4d-96ae-a1b29c58a331","timestamp":"2026-03-24T06:10:18.321Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"ce2ffbf7-3ed3-41bf-81a6-9e73ff78b9e1","timestamp":"2026-03-24T06:10:18.322Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"ce2ffbf7-3ed3-41bf-81a6-9e73ff78b9e1","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:10:19.618Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_018sWWFkFohJEMynV56T3Zwc","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01AMrNrQuAe1zhgN9MkZiY5a","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go","offset":627,"limit":200},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":1708,"cache_read_input_tokens":68398,"cache_creation":{"ephemeral_5m_input_tokens":1708,"ephemeral_1h_input_tokens":0},"output_tokens":3,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQd3cpH3kSVB4zwZ8PN","uuid":"3f7099c6-364d-4952-b789-22332fd30b1b"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"afd15c5d-fa8a-4b29-bd0d-7e409eab6aba","timestamp":"2026-03-24T06:10:19.618Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"afd15c5d-fa8a-4b29-bd0d-7e409eab6aba","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01AMrNrQuAe1zhgN9MkZiY5a","type":"tool_result","content":"   627→func (m *MemoryStore) ToCheckpointWAL(dir string, from, to int64) (int, []string, error) {\n   628→\t// Collect all cluster/host pairs.\n   629→\tm.root.lock.RLock()\n   630→\ttotalHosts := 0\n   631→\tfor _, l1 := range m.root.children {\n   632→\t\tl1.lock.RLock()\n   633→\t\ttotalHosts += len(l1.children)\n   634→\t\tl1.lock.RUnlock()\n   635→\t}\n   636→\tm.root.lock.RUnlock()\n   637→\n   638→\tlevels := make([]*Level, 0, totalHosts)\n   639→\tselectors := make([][]string, 0, totalHosts)\n   640→\n   641→\tm.root.lock.RLock()\n   642→\tfor sel1, l1 := range m.root.children {\n   643→\t\tl1.lock.RLock()\n   644→\t\tfor sel2, l2 := range l1.children {\n   645→\t\t\tlevels = append(levels, l2)\n   646→\t\t\tselectors = append(selectors, []string{sel1, sel2})\n   647→\t\t}\n   648→\t\tl1.lock.RUnlock()\n   649→\t}\n   650→\tm.root.lock.RUnlock()\n   651→\n   652→\ttype workItem struct {\n   653→\t\tlevel    *Level\n   654→\t\thostDir  string\n   655→\t\tselector []string\n   656→\t}\n   657→\n   658→\tn, errs := int32(0), int32(0)\n   659→\tvar successDirs []string\n   660→\tvar successMu sync.Mutex\n   661→\n   662→\tvar wg sync.WaitGroup\n   663→\twg.Add(Keys.NumWorkers)\n   664→\twork := make(chan workItem, Keys.NumWorkers*2)\n   665→\n   666→\tfor range Keys.NumWorkers {\n   667→\t\tgo func() {\n   668→\t\t\tdefer wg.Done()\n   669→\t\t\tfor wi := range work {\n   670→\t\t\t\terr := wi.level.toCheckpointBinary(wi.hostDir, from, to, m)\n   671→\t\t\t\tif err != nil {\n   672→\t\t\t\t\tif err == ErrNoNewArchiveData {\n   673→\t\t\t\t\t\tcontinue\n   674→\t\t\t\t\t}\n   675→\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> binary checkpoint error for %s: %v\", wi.hostDir, err)\n   676→\t\t\t\t\tatomic.AddInt32(&errs, 1)\n   677→\t\t\t\t} else {\n   678→\t\t\t\t\tatomic.AddInt32(&n, 1)\n   679→\t\t\t\t\tsuccessMu.Lock()\n   680→\t\t\t\t\tsuccessDirs = append(successDirs, wi.hostDir)\n   681→\t\t\t\t\tsuccessMu.Unlock()\n   682→\t\t\t\t}\n   683→\t\t\t}\n   684→\t\t}()\n   685→\t}\n   686→\n   687→\tfor i := range levels {\n   688→\t\thostDir := path.Join(dir, path.Join(selectors[i]...))\n   689→\t\twork <- workItem{\n   690→\t\t\tlevel:    levels[i],\n   691→\t\t\thostDir:  hostDir,\n   692→\t\t\tselector: selectors[i],\n   693→\t\t}\n   694→\t}\n   695→\tclose(work)\n   696→\twg.Wait()\n   697→\n   698→\tif errs > 0 {\n   699→\t\treturn int(n), successDirs, fmt.Errorf(\"[METRICSTORE]> %d errors during binary checkpoint (%d successes)\", errs, n)\n   700→\t}\n   701→\treturn int(n), successDirs, nil\n   702→}\n   703→\n   704→// toCheckpointBinary writes a binary snapshot file for a single host-level node.\n   705→// Uses atomic rename (write to .tmp then rename) to avoid partial reads on crash.\n   706→func (l *Level) toCheckpointBinary(dir string, from, to int64, m *MemoryStore) error {\n   707→\tcf, err := l.toCheckpointFile(from, to, m)\n   708→\tif err != nil {\n   709→\t\treturn err\n   710→\t}\n   711→\tif cf == nil {\n   712→\t\treturn ErrNoNewArchiveData\n   713→\t}\n   714→\n   715→\tif err := os.MkdirAll(dir, CheckpointDirPerms); err != nil {\n   716→\t\treturn fmt.Errorf(\"mkdir %s: %w\", dir, err)\n   717→\t}\n   718→\n   719→\t// Write to a temp file first, then rename (atomic on POSIX).\n   720→\ttmpPath := path.Join(dir, fmt.Sprintf(\"%d.bin.tmp\", from))\n   721→\tfinalPath := path.Join(dir, fmt.Sprintf(\"%d.bin\", from))\n   722→\n   723→\tf, err := os.OpenFile(tmpPath, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, CheckpointFilePerms)\n   724→\tif err != nil {\n   725→\t\treturn fmt.Errorf(\"open binary snapshot %s: %w\", tmpPath, err)\n   726→\t}\n   727→\n   728→\tbw := bufio.NewWriter(f)\n   729→\tif err := writeBinarySnapshotFile(bw, cf); err != nil {\n   730→\t\tf.Close()\n   731→\t\tos.Remove(tmpPath)\n   732→\t\treturn fmt.Errorf(\"write binary snapshot: %w\", err)\n   733→\t}\n   734→\tif err := bw.Flush(); err != nil {\n   735→\t\tf.Close()\n   736→\t\tos.Remove(tmpPath)\n   737→\t\treturn err\n   738→\t}\n   739→\tf.Close()\n   740→\n   741→\treturn os.Rename(tmpPath, finalPath)\n   742→}\n   743→\n   744→// writeBinarySnapshotFile writes the binary snapshot file header and level tree.\n   745→func writeBinarySnapshotFile(w io.Writer, cf *CheckpointFile) error {\n   746→\tif err := binary.Write(w, binary.LittleEndian, snapFileMagic); err != nil {\n   747→\t\treturn err\n   748→\t}\n   749→\tif err := binary.Write(w, binary.LittleEndian, cf.From); err != nil {\n   750→\t\treturn err\n   751→\t}\n   752→\tif err := binary.Write(w, binary.LittleEndian, cf.To); err != nil {\n   753→\t\treturn err\n   754→\t}\n   755→\treturn writeBinaryLevel(w, cf)\n   756→}\n   757→\n   758→// writeBinaryLevel recursively writes a CheckpointFile level in binary format.\n   759→func writeBinaryLevel(w io.Writer, cf *CheckpointFile) error {\n   760→\tif err := binary.Write(w, binary.LittleEndian, uint32(len(cf.Metrics))); err != nil {\n   761→\t\treturn err\n   762→\t}\n   763→\n   764→\tfor name, metric := range cf.Metrics {\n   765→\t\tif err := writeString16(w, name); err != nil {\n   766→\t\t\treturn err\n   767→\t\t}\n   768→\t\tif err := binary.Write(w, binary.LittleEndian, metric.Frequency); err != nil {\n   769→\t\t\treturn err\n   770→\t\t}\n   771→\t\tif err := binary.Write(w, binary.LittleEndian, metric.Start); err != nil {\n   772→\t\t\treturn err\n   773→\t\t}\n   774→\t\tif err := binary.Write(w, binary.LittleEndian, uint32(len(metric.Data))); err != nil {\n   775→\t\t\treturn err\n   776→\t\t}\n   777→\t\tfor _, v := range metric.Data {\n   778→\t\t\tif err := binary.Write(w, binary.LittleEndian, math.Float32bits(float32(v))); err != nil {\n   779→\t\t\t\treturn err\n   780→\t\t\t}\n   781→\t\t}\n   782→\t}\n   783→\n   784→\tif err := binary.Write(w, binary.LittleEndian, uint32(len(cf.Children))); err != nil {\n   785→\t\treturn err\n   786→\t}\n   787→\n   788→\tfor name, child := range cf.Children {\n   789→\t\tif err := writeString16(w, name); err != nil {\n   790→\t\t\treturn err\n   791→\t\t}\n   792→\t\tif err := writeBinaryLevel(w, child); err != nil {\n   793→\t\t\treturn err\n   794→\t\t}\n   795→\t}\n   796→\n   797→\treturn nil\n   798→}\n   799→\n   800→// writeString16 writes a 2-byte length-prefixed string to w.\n   801→func writeString16(w io.Writer, s string) error {\n   802→\tif err := binary.Write(w, binary.LittleEndian, uint16(len(s))); err != nil {\n   803→\t\treturn err\n   804→\t}\n   805→\t_, err := io.WriteString(w, s)\n   806→\treturn err\n   807→}\n   808→\n   809→// loadBinaryFile reads a binary snapshot file and loads data into the Level tree.\n   810→// The retention check (from) is applied to the file's 'to' timestamp.\n   811→func (l *Level) loadBinaryFile(m *MemoryStore, f *os.File, from int64) error {\n   812→\tbr := bufio.NewReader(f)\n   813→\n   814→\tvar magic uint32\n   815→\tif err := binary.Read(br, binary.LittleEndian, &magic); err != nil {\n   816→\t\treturn fmt.Errorf(\"[METRICSTORE]> binary snapshot: read magic: %w\", err)\n   817→\t}\n   818→\tif magic != snapFileMagic {\n   819→\t\treturn fmt.Errorf(\"[METRICSTORE]> binary snapshot: invalid magic 0x%08X (expected 0x%08X)\", magic, snapFileMagic)\n   820→\t}\n   821→\n   822→\tvar fileFrom, fileTo int64\n   823→\tif err := binary.Read(br, binary.LittleEndian, &fileFrom); err != nil {\n   824→\t\treturn fmt.Errorf(\"[METRICSTORE]> binary snapshot: read from: %w\", err)\n   825→\t}\n   826→\tif err := binary.Read(br, binary.LittleEndian, &fileTo); err != nil {"}]},"uuid":"3b876f52-5d92-4dd1-91e4-7d1e9c782310","timestamp":"2026-03-24T06:10:19.634Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"eec0882d-8b3b-4185-85a8-70f636df9fd4","timestamp":"2026-03-24T06:10:19.635Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"eec0882d-8b3b-4185-85a8-70f636df9fd4","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:10:21.737Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01Sx4xeP9UN22bABsciaoTMp","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01MrhTGALBxspXPvkcX6RstK","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go","offset":400,"limit":50},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":0,"cache_creation_input_tokens":2927,"cache_read_input_tokens":70106,"cache_creation":{"ephemeral_5m_input_tokens":2927,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQd9EewzJeptMPFbPkg","uuid":"f7c56ba8-3c77-457c-8cf6-1359d5daa073"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"37160f00-1cbf-4860-810c-0f5c9af305ee","timestamp":"2026-03-24T06:10:21.737Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"37160f00-1cbf-4860-810c-0f5c9af305ee","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01MrhTGALBxspXPvkcX6RstK","type":"tool_result","content":"   400→\t}\n   401→\n   402→\t// Handle context cancellation for graceful shutdown\n   403→\tgo func() {\n   404→\t\t<-ctx.Done()\n   405→\t\tshutdownCtx, cancel := context.WithTimeout(context.Background(), 30*time.Second)\n   406→\t\tdefer cancel()\n   407→\t\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n   408→\t\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n   409→\t\t}\n   410→\t}()\n   411→\n   412→\tif err = s.server.Serve(listener); err != nil && err != http.ErrServerClosed {\n   413→\t\treturn fmt.Errorf(\"server failed: %w\", err)\n   414→\t}\n   415→\treturn nil\n   416→}\n   417→\n   418→func (s *Server) Shutdown(ctx context.Context) {\n   419→\t// Create a shutdown context with timeout\n   420→\tshutdownCtx, cancel := context.WithTimeout(ctx, 30*time.Second)\n   421→\tdefer cancel()\n   422→\n   423→\tnc := nats.GetClient()\n   424→\tif nc != nil {\n   425→\t\tnc.Close()\n   426→\t}\n   427→\n   428→\t// First shut down the server gracefully (waiting for all ongoing requests)\n   429→\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n   430→\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n   431→\t}\n   432→\n   433→\t// Archive all the metric store data\n   434→\tms := metricstore.GetMemoryStore()\n   435→\n   436→\tif ms != nil {\n   437→\t\tmetricstore.Shutdown()\n   438→\t}\n   439→\n   440→\t// Shutdown archiver with 10 second timeout for fast shutdown\n   441→\tif err := archiver.Shutdown(10 * time.Second); err != nil {\n   442→\t\tcclog.Warnf(\"Archiver shutdown: %v\", err)\n   443→\t}\n   444→}\n   445→"}]},"uuid":"71d38f11-c7ef-4f5e-b504-4aa25a7f36da","timestamp":"2026-03-24T06:10:21.756Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"a6ad2263-fa0d-4293-965e-9758988bbe0e","timestamp":"2026-03-24T06:10:21.967Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"a6ad2263-fa0d-4293-965e-9758988bbe0e","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:10:22.013Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01Sx4xeP9UN22bABsciaoTMp","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01MG8QRaRotTbmGBP2Wn7Jmb","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go","offset":418,"limit":30},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":0,"cache_creation_input_tokens":2927,"cache_read_input_tokens":70106,"cache_creation":{"ephemeral_5m_input_tokens":2927,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQd9EewzJeptMPFbPkg","uuid":"028f1c44-dd8b-4256-856c-bb345e8d866d"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"29f0782b-ea58-40b6-bdd8-944e23aeeb1a","timestamp":"2026-03-24T06:10:22.013Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"29f0782b-ea58-40b6-bdd8-944e23aeeb1a","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01MG8QRaRotTbmGBP2Wn7Jmb","type":"tool_result","content":"   418→func (s *Server) Shutdown(ctx context.Context) {\n   419→\t// Create a shutdown context with timeout\n   420→\tshutdownCtx, cancel := context.WithTimeout(ctx, 30*time.Second)\n   421→\tdefer cancel()\n   422→\n   423→\tnc := nats.GetClient()\n   424→\tif nc != nil {\n   425→\t\tnc.Close()\n   426→\t}\n   427→\n   428→\t// First shut down the server gracefully (waiting for all ongoing requests)\n   429→\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n   430→\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n   431→\t}\n   432→\n   433→\t// Archive all the metric store data\n   434→\tms := metricstore.GetMemoryStore()\n   435→\n   436→\tif ms != nil {\n   437→\t\tmetricstore.Shutdown()\n   438→\t}\n   439→\n   440→\t// Shutdown archiver with 10 second timeout for fast shutdown\n   441→\tif err := archiver.Shutdown(10 * time.Second); err != nil {\n   442→\t\tcclog.Warnf(\"Archiver shutdown: %v\", err)\n   443→\t}\n   444→}\n   445→"}]},"uuid":"7d3fe32c-b66f-4bbf-a8c5-6b110f044476","timestamp":"2026-03-24T06:10:22.019Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"adbec1d2-7dcf-4e0e-bcab-dda5c0f802e4","timestamp":"2026-03-24T06:10:22.023Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"adbec1d2-7dcf-4e0e-bcab-dda5c0f802e4","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:10:23.717Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01GMkZPNNg6Z48w7YfZfwdDm","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01SMB7JYc3eLskdcnUnj43kS","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go","offset":339,"limit":130},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":1445,"cache_read_input_tokens":73033,"cache_creation":{"ephemeral_5m_input_tokens":1445,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQdKXnFHzfdmaNGXvVX","uuid":"fb9c8f1b-036c-43dd-9871-fc82d702d99f"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"179a8b7d-679d-42ab-9951-ebad90dfd71a","timestamp":"2026-03-24T06:10:23.718Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"179a8b7d-679d-42ab-9951-ebad90dfd71a","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01SMB7JYc3eLskdcnUnj43kS","type":"tool_result","content":"   339→func runServer(ctx context.Context) error {\n   340→\tvar wg sync.WaitGroup\n   341→\n   342→\t// Initialize metric store if configuration is provided\n   343→\thaveMetricstore := false\n   344→\tmscfg := ccconf.GetPackageConfig(\"metric-store\")\n   345→\tif mscfg != nil {\n   346→\t\tmetrics := metricstore.BuildMetricList()\n   347→\t\tmetricstore.Init(mscfg, metrics, &wg)\n   348→\n   349→\t\t// Inject repository as NodeProvider to break import cycle\n   350→\t\tms := metricstore.GetMemoryStore()\n   351→\t\tjobRepo := repository.GetJobRepository()\n   352→\t\tms.SetNodeProvider(jobRepo)\n   353→\t\tmetricstore.MetricStoreHandle = &metricstore.InternalMetricStore{}\n   354→\t\thaveMetricstore = true\n   355→\t} else {\n   356→\t\tmetricstore.MetricStoreHandle = nil\n   357→\t\tcclog.Debug(\"missing internal metricstore configuration\")\n   358→\t}\n   359→\n   360→\t// Initialize external metric stores if configuration is provided\n   361→\tmscfg = ccconf.GetPackageConfig(\"metric-store-external\")\n   362→\tif mscfg != nil {\n   363→\t\terr := metricdispatch.Init(mscfg)\n   364→\n   365→\t\tif err != nil {\n   366→\t\t\tcclog.Debugf(\"error while initializing external metricdispatch: %v\", err)\n   367→\t\t} else {\n   368→\t\t\thaveMetricstore = true\n   369→\t\t}\n   370→\t}\n   371→\n   372→\tif !haveMetricstore {\n   373→\t\treturn fmt.Errorf(\"missing metricstore configuration\")\n   374→\t}\n   375→\n   376→\t// Start archiver and task manager\n   377→\tarchiver.Start(repository.GetJobRepository(), ctx)\n   378→\ttaskmanager.Start(ccconf.GetPackageConfig(\"cron\"), ccconf.GetPackageConfig(\"archive\"))\n   379→\n   380→\t// Initialize web UI\n   381→\tcfg := ccconf.GetPackageConfig(\"ui\")\n   382→\tif err := web.Init(cfg); err != nil {\n   383→\t\treturn fmt.Errorf(\"initializing web UI: %w\", err)\n   384→\t}\n   385→\n   386→\t// Initialize HTTP server\n   387→\tsrv, err := NewServer(version, commit, date)\n   388→\tif err != nil {\n   389→\t\treturn fmt.Errorf(\"creating server: %w\", err)\n   390→\t}\n   391→\n   392→\t// Channel to collect errors from server\n   393→\terrChan := make(chan error, 1)\n   394→\n   395→\t// Start HTTP server\n   396→\twg.Go(func() {\n   397→\t\tif err := srv.Start(ctx); err != nil {\n   398→\t\t\terrChan <- err\n   399→\t\t}\n   400→\t})\n   401→\n   402→\t// Handle shutdown signals\n   403→\twg.Add(1)\n   404→\tsigs := make(chan os.Signal, 1)\n   405→\tsignal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)\n   406→\tgo func() {\n   407→\t\tdefer wg.Done()\n   408→\t\tselect {\n   409→\t\tcase <-sigs:\n   410→\t\t\tcclog.Info(\"Shutdown signal received\")\n   411→\t\tcase <-ctx.Done():\n   412→\t\t}\n   413→\n   414→\t\truntime.SystemdNotify(false, \"Shutting down ...\")\n   415→\t\tsrv.Shutdown(ctx)\n   416→\t\tutil.FsWatcherShutdown()\n   417→\t\ttaskmanager.Shutdown()\n   418→\t}()\n   419→\n   420→\t// Set GC percent if not configured\n   421→\tif os.Getenv(envGOGC) == \"\" {\n   422→\t\t// trigger GC when heap grows 15% above the previous live set\n   423→\t\tdebug.SetGCPercent(15)\n   424→\t}\n   425→\truntime.SystemdNotify(true, \"running\")\n   426→\n   427→\twaitDone := make(chan struct{})\n   428→\tgo func() {\n   429→\t\twg.Wait()\n   430→\t\tclose(waitDone)\n   431→\t}()\n   432→\n   433→\tgo func() {\n   434→\t\t<-waitDone\n   435→\t\tclose(errChan)\n   436→\t}()\n   437→\n   438→\t// Wait for either:\n   439→\t// 1. An error from server startup\n   440→\t// 2. Completion of all goroutines (normal shutdown or crash)\n   441→\tselect {\n   442→\tcase err := <-errChan:\n   443→\t\t// errChan will be closed when waitDone is closed, which happens\n   444→\t\t// when all goroutines complete (either from normal shutdown or error)\n   445→\t\tif err != nil {\n   446→\t\t\treturn err\n   447→\t\t}\n   448→\tcase <-time.After(100 * time.Millisecond):\n   449→\t\t// Give the server 100ms to start and report any immediate startup errors\n   450→\t\t// After that, just wait for normal shutdown completion\n   451→\t\tselect {\n   452→\t\tcase err := <-errChan:\n   453→\t\t\tif err != nil {\n   454→\t\t\t\treturn err\n   455→\t\t\t}\n   456→\t\tcase <-waitDone:\n   457→\t\t\t// Normal shutdown completed\n   458→\t\t}\n   459→\t}\n   460→\n   461→\tcclog.Print(\"Graceful shutdown completed!\")\n   462→\treturn nil\n   463→}\n   464→\n   465→func run() error {\n   466→\tcliInit()\n   467→\n   468→\tif flagVersion {"}]},"uuid":"c3881b20-2413-4440-b570-0f9c4a73ad0c","timestamp":"2026-03-24T06:10:23.735Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"333e51f1-359b-4e1d-93ec-66e4c5735382","timestamp":"2026-03-24T06:10:23.736Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"333e51f1-359b-4e1d-93ec-66e4c5735382","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:10:25.760Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01CW46hxVq5gzwcypmDfLecz","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_016C4QqzKowMjDeEP3aQhzc1","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go","offset":254,"limit":75},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":0,"cache_creation_input_tokens":1695,"cache_read_input_tokens":74478,"cache_creation":{"ephemeral_5m_input_tokens":1695,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQdSnLzb4MwK4A7usv5","uuid":"b22543aa-5344-4aab-af46-63456623936b"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"2dfa5f05-9a6e-4ea8-8917-36ccd41349cc","timestamp":"2026-03-24T06:10:25.760Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"2dfa5f05-9a6e-4ea8-8917-36ccd41349cc","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_016C4QqzKowMjDeEP3aQhzc1","type":"tool_result","content":"   254→\t\t\t\t\t}\n   255→\t\t\t\t}\n   256→\t\t\t}\n   257→\n   258→\t\t\tdrain := func() {\n   259→\t\t\t\tfor {\n   260→\t\t\t\t\tselect {\n   261→\t\t\t\t\tcase msg, ok := <-msgCh:\n   262→\t\t\t\t\t\tif !ok {\n   263→\t\t\t\t\t\t\treturn\n   264→\t\t\t\t\t\t}\n   265→\t\t\t\t\t\tprocessMsg(msg)\n   266→\t\t\t\t\tcase req := <-rotateCh:\n   267→\t\t\t\t\t\tprocessRotate(req)\n   268→\t\t\t\t\tdefault:\n   269→\t\t\t\t\t\tflushDirty()\n   270→\t\t\t\t\t\treturn\n   271→\t\t\t\t\t}\n   272→\t\t\t\t}\n   273→\t\t\t}\n   274→\n   275→\t\t\tticker := time.NewTicker(walFlushInterval)\n   276→\t\t\tdefer ticker.Stop()\n   277→\n   278→\t\t\t// drainBatch processes up to 4096 pending messages without blocking.\n   279→\t\t\t// Returns false if the channel was closed.\n   280→\t\t\tdrainBatch := func() bool {\n   281→\t\t\t\tfor range 4096 {\n   282→\t\t\t\t\tselect {\n   283→\t\t\t\t\tcase msg, ok := <-msgCh:\n   284→\t\t\t\t\t\tif !ok {\n   285→\t\t\t\t\t\t\tflushDirty()\n   286→\t\t\t\t\t\t\treturn false\n   287→\t\t\t\t\t\t}\n   288→\t\t\t\t\t\tprocessMsg(msg)\n   289→\t\t\t\t\tcase req := <-rotateCh:\n   290→\t\t\t\t\t\tprocessRotate(req)\n   291→\t\t\t\t\tdefault:\n   292→\t\t\t\t\t\treturn true\n   293→\t\t\t\t\t}\n   294→\t\t\t\t}\n   295→\t\t\t\treturn true\n   296→\t\t\t}\n   297→\n   298→\t\t\tfor {\n   299→\t\t\t\tselect {\n   300→\t\t\t\tcase <-ctx.Done():\n   301→\t\t\t\t\tdrain()\n   302→\t\t\t\t\treturn\n   303→\t\t\t\tcase msg, ok := <-msgCh:\n   304→\t\t\t\t\tif !ok {\n   305→\t\t\t\t\t\treturn\n   306→\t\t\t\t\t}\n   307→\t\t\t\t\tprocessMsg(msg)\n   308→\t\t\t\t\tif !drainBatch() {\n   309→\t\t\t\t\t\treturn\n   310→\t\t\t\t\t}\n   311→\t\t\t\t\t// No flush here — timer handles periodic flushing.\n   312→\t\t\t\tcase <-ticker.C:\n   313→\t\t\t\t\tflushDirty()\n   314→\t\t\t\tcase req := <-rotateCh:\n   315→\t\t\t\t\tprocessRotate(req)\n   316→\t\t\t\t}\n   317→\t\t\t}\n   318→\t\t})\n   319→\t}\n   320→}\n   321→\n   322→// RotateWALFiles sends rotation requests for the given host directories\n   323→// and blocks until all rotations complete. Each request is routed to the\n   324→// shard that owns the host directory.\n   325→func RotateWALFiles(hostDirs []string) {\n   326→\tif walShardRotateChs == nil {\n   327→\t\treturn\n   328→\t}"}]},"uuid":"0806456f-7c13-4097-b29c-ca83b7e519f4","timestamp":"2026-03-24T06:10:25.777Z"},"type":"agent_progress","prompt":"","agentId":"a430c972b949ad362"},"toolUseID":"agent_msg_01YXaQWVwbAeW4KAkPGnxXkY","parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","uuid":"9f6211f1-1384-408b-a2f4-0cfc2207ff61","timestamp":"2026-03-24T06:10:25.778Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"9f6211f1-1384-408b-a2f4-0cfc2207ff61","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Agent","command":"entire hooks claude-code post-task"},"parentToolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","toolUseID":"toolu_01K3M4GtnfMya8DABUyjdV4Q","timestamp":"2026-03-24T06:10:53.687Z","uuid":"f9273b70-9db9-412d-aeab-2b8e594bebd3","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"311d2796-2e7e-43f4-afcb-4907f870af13","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01K3M4GtnfMya8DABUyjdV4Q","type":"tool_result","content":[{"type":"text","text":"Perfect! Now I have all the information I need. Let me create a comprehensive report:\n\n## Summary: Shutdown Flow and Worker Pool Analysis\n\nI've completed a thorough analysis of the shutdown flow and worker pool implementations. The recent increase in shutdown time from ~10s to ~40s is likely caused by a recent change to the WAL staging worker pool combined with how shutdown orchestration works. Here are my findings:\n\n### 1. **MAIN SHUTDOWN FLOW** (`cmd/cc-backend/main.go`)\n\n**Signal Handling (lines 402-418):**\n- Receives SIGINT/SIGTERM on channel (line 405)\n- Calls `srv.Shutdown(ctx)` (line 415)\n- Calls `util.FsWatcherShutdown()` (line 416)\n- Calls `taskmanager.Shutdown()` (line 417)\n- Waits for all goroutines to complete via `wg.Wait()` (lines 428-431)\n\n**Key Timeouts:**\n- HTTP server shutdown: **30 seconds** (line 420 in `server.go`)\n- Archiver shutdown: **10 seconds** (line 441 in `server.go`)\n- NO TIMEOUT on metricstore shutdown (line 437 in `server.go` - **THIS IS BLOCKING**)\n\n---\n\n### 2. **SERVER SHUTDOWN** (`cmd/cc-backend/server.go:418-444`)\n\n**Current Implementation:**\n```go\nfunc (s *Server) Shutdown(ctx context.Context) {\n    shutdownCtx, cancel := context.WithTimeout(ctx, 30*time.Second)\n    defer cancel()\n    \n    // 1. Close NATS client (line 425)\n    // 2. HTTP server graceful shutdown with 30s timeout (lines 429-431)\n    // 3. metricstore.Shutdown() - NO TIMEOUT (line 437) ⚠️\n    // 4. archiver.Shutdown(10s) (line 441)\n}\n```\n\n**Problem Areas:**\n- **metricstore.Shutdown()** (line 437) has **NO TIMEOUT** and performs blocking I/O operations\n- This function writes final checkpoint files synchronously, which can take significant time\n\n---\n\n### 3. **METRICSTORE SHUTDOWN** (`pkg/metricstore/metricstore.go:273-310`)\n\n**Key Steps:**\n1. Cancels context to stop all background workers (lines 276-278)\n2. **Closes WAL shard channels** (lines 280-283) - triggers shutdown of all WAL staging goroutines\n3. **Writes final checkpoint** (lines 296-304) - **THIS IS BLOCKING AND CAN BE SLOW**\n   - Calls `ms.ToCheckpointWAL()` for binary format (line 298)\n   - Calls `RotateWALFilesAfterShutdown()` (line 300)\n\n**The WAL Checkpoint Problem:**\n- `ToCheckpointWAL()` (walCheckpoint.go:627-702) uses a worker pool (line 663)\n- Creates worker goroutines with `Keys.NumWorkers` workers (line 663)\n- Each worker processes serialization of metric data to binary snapshot files\n- This is parallel I/O-heavy work with **NO TIMEOUT**\n- On shutdown, this must complete fully before returning\n\n---\n\n### 4. **WAL STAGING WORKER POOL** (`pkg/metricstore/walCheckpoint.go:154-320`)\n\n**Recent Change (commit 0325d9e8 - \"fix: Increase throughput for WAL writers\"):**\n\nThe change modified the WAL staging implementation to:\n- **Before:** Flushed immediately after every batch of ~256 messages\n- **After:** Uses a 5-second timer (`walFlushInterval`) for periodic flushing (line 123)\n- Added `drainBatch()` function that processes up to 4096 messages per batch (line 278-296)\n\n**Architecture:**\n- Creates `Keys.NumWorkers` sharded worker goroutines (lines 162-319)\n- Each shard owns a subset of hosts (determined by FNV-1a hash)\n- Each worker maintains `hostFiles` map with open file handles\n- Workers process messages from buffered channels (capacity: `65536/walNumShards`)\n\n**Shutdown Sequence:**\n1. Closes all WAL shard channels (main.go line 281-283)\n2. Triggers `drain()` function on each worker (line 301)\n3. Drain tries to process remaining messages in \"drainBatch\" pattern\n4. **Problem:** If channels still have pending messages, `drain()` will block processing them all\n\n---\n\n### 5. **ARCHIVER SHUTDOWN** (`internal/archiver/archiveWorker.go:196-250`)\n\n**Has proper timeout handling:**\n```go\nfunc Shutdown(timeout time.Duration) error {\n    close(archiveChannel)           // line 226\n    done := make(chan struct{})\n    go func() {\n        archivePending.Wait()       // Wait for pending jobs\n        close(done)\n    }()\n    \n    select {\n    case <-done:                    // All jobs completed\n        <-workerDone                // Wait for worker exit\n        return nil\n    case <-time.After(timeout):     // Timeout exceeded\n        shutdownCancel()            // Cancel ongoing operations\n        <-workerDone                // Wait for worker to exit\n        return fmt.Errorf(\"...\")\n    }\n}\n```\n\n**Called with 10s timeout** (server.go:441)\n\n---\n\n### 6. **TASKMANAGER SHUTDOWN** (`internal/taskmanager/taskManager.go:164-169`)\n\n**Simple implementation:**\n```go\nfunc Shutdown() {\n    if s != nil {\n        s.Shutdown()  // gocron scheduler shutdown (blocking)\n    }\n}\n```\n\n**No timeout specified** - delegates to gocron scheduler\n\n---\n\n### 7. **NATS API WORKER POOL** (`internal/api/nats.go:83-157`)\n\n**Architecture:**\n- Creates `JobConcurrency` job worker goroutines (line 105-107, default 8)\n- Creates `NodeConcurrency` node worker goroutines (line 108-110, default 2)\n- Uses buffered channels for message routing\n- **No explicit shutdown in the code** - relies on channel closure during context cancellation\n\n**Goroutines:**\n- `jobWorker()` processes job events (lines 116-120)\n- `nodeWorker()` processes node state (lines 123-127)\n- Created during `NewNatsAPI()` (lines 105-110)\n- Workers run indefinitely until channel closes\n\n---\n\n### 8. **IDENTIFIED TIMEOUT VALUES**\n\n| Component | Timeout | Location | Issue |\n|-----------|---------|----------|-------|\n| HTTP Server Shutdown | 30s | server.go:420 | Uses dedicated timeout, OK |\n| Archiver Shutdown | 10s | server.go:441 | Explicit timeout, OK |\n| Metricstore Shutdown | **NONE** | server.go:437 | **NO TIMEOUT - CAN BLOCK** |\n| WAL Final Checkpoint | **NONE** | metricstore.go:298 | **NO TIMEOUT - BLOCKING I/O** |\n| Taskmanager Shutdown | **NONE** | main.go:417 | Delegates to gocron, may block |\n\n---\n\n### 9. **ROOT CAUSE ANALYSIS**\n\n**Why shutdown takes ~40s instead of ~10s:**\n\n1. **metricstore.Shutdown()** is called without timeout (server.go:437)\n2. This function performs `ToCheckpointWAL()` which:\n   - Creates worker pool with `Keys.NumWorkers` workers\n   - Each worker serializes potentially GB-scale metric data to binary files\n   - Uses parallel I/O with `sync.WaitGroup` blocking until all workers complete\n   - Can take 20-30+ seconds on large metric datasets\n3. There's **no cancellation mechanism** if checkpoint takes too long\n4. During shutdown, the HTTP server gets 30s timeout, but everything after metricstore shutdown gets no timeout\n\n**Why the recent WAL commit might have worsened this:**\n- The commit increased throughput by batching messages and using periodic flushing\n- This accumulates more in-flight messages in channels\n- On shutdown, the `drain()` function must process all accumulated messages\n- This increases the backlog that must be drained during shutdown\n\n---\n\n### 10. **SHUTDOWN SEQUENCE TIMELINE**\n\n```\nSignal received (t=0)\n↓\nsrv.Shutdown(ctx) starts (30s timeout on HTTP graceful shutdown)\n    ├─ NATS client closes\n    └─ HTTP server waits for ongoing requests\n↓\nutil.FsWatcherShutdown() (no timeout)\n↓\nmetricstore.Shutdown() starts (NO TIMEOUT) ⚠️\n    ├─ Cancels context (stops background workers)\n    ├─ Closes WAL shard channels\n    ├─ Calls ToCheckpointWAL() (BLOCKING, worker pool, I/O intensive) ⚠️\n    │   └─ Creates NumWorkers goroutines\n    │   └─ Each serializes metric data to disk\n    │   └─ Waits for all with sync.WaitGroup\n    └─ Calls RotateWALFilesAfterShutdown()\n↓\ntaskmanager.Shutdown() (no timeout)\n    └─ gocron.Shutdown() (blocking)\n↓\narchiver.Shutdown(10s) (10s timeout)\n↓\nwg.Wait() for all goroutines (blocking)\n↓\nDone (t=~40s)\n```\n\n---\n\n### **ABSOLUTE FILE PATHS & LINE NUMBERS**\n\n**Shutdown Entry Points:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go:339-463` - runServer()\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go:402-418` - Signal handling\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go:418-444` - Server.Shutdown()\n\n**Metricstore Shutdown (CRITICAL SECTION):**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go:273-310` - Shutdown()\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go:627-702` - ToCheckpointWAL()\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go:154-320` - WALStaging() worker pool\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go:322-340` - RotateWALFiles()\n\n**Archiver Shutdown:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:196-250` - Shutdown()\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:71-92` - Start()\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:110-171` - archivingWorker()\n\n**NATS API Worker Pool:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/api/nats.go:83-113` - NewNatsAPI()\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/api/nats.go:105-110` - Worker goroutine creation\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/api/nats.go:116-127` - Worker functions\n\n**Taskmanager Shutdown:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/taskmanager/taskManager.go:103-145` - Start()\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/taskmanager/taskManager.go:164-169` - Shutdown()\n\n---\n\n### **RECOMMENDATIONS**\n\n1. **Add timeout to metricstore.Shutdown()** - Currently has no mechanism to interrupt if checkpoint takes too long\n2. **Drain WAL channels with timeout during shutdown** - The drain() function can block indefinitely on channels\n3. **Make final checkpoint optional or configurable** - For fast shutdowns, allow skipping the final checkpoint\n4. **Monitor TOCheckpointWAL() performance** - This worker pool I/O operation is the bottleneck\n5. **Add NATS worker pool shutdown** - Currently no explicit shutdown for NATS API workers\n6. **Add taskmanager shutdown timeout** - Delegate to gocron may block indefinitely"},{"type":"text","text":"agentId: a430c972b949ad362 (use SendMessage with to: 'a430c972b949ad362' to continue this agent)\n<usage>total_tokens: 80252\ntool_uses: 32\nduration_ms: 66730</usage>"}]}]},"uuid":"bb048cf4-aae7-4d1b-8e6f-58a5cf03c864","timestamp":"2026-03-24T06:10:53.686Z","toolUseResult":{"status":"completed","prompt":"I need to understand the shutdown flow and worker pool implementation in this Go backend. The shutdown time has increased from ~10s to ~40s, possibly due to recently added worker pools.\n\nPlease find and trace:\n\n1. The main shutdown flow in `cmd/cc-backend/` — how the server shuts down, what timeout is used, what cleanup happens\n2. Any worker pool implementations — look for goroutine pools, worker patterns, especially recently added ones\n3. NATS shutdown/cleanup code in `internal/api/nats.go`\n4. The metricstore shutdown in `pkg/metricstore/`\n5. Any hardcoded timeout values related to shutdown (look for context.WithTimeout, time.After, signal handling, etc.)\n\nBe very thorough — search for \"Shutdown\", \"shutdown\", \"graceful\", \"worker\", \"pool\", \"drain\", \"Close\", \"signal\", \"SIGTERM\", \"SIGINT\" across the codebase. Report exact file paths, line numbers, and the relevant code snippets.","agentId":"a430c972b949ad362","content":[{"type":"text","text":"Perfect! Now I have all the information I need. Let me create a comprehensive report:\n\n## Summary: Shutdown Flow and Worker Pool Analysis\n\nI've completed a thorough analysis of the shutdown flow and worker pool implementations. The recent increase in shutdown time from ~10s to ~40s is likely caused by a recent change to the WAL staging worker pool combined with how shutdown orchestration works. Here are my findings:\n\n### 1. **MAIN SHUTDOWN FLOW** (`cmd/cc-backend/main.go`)\n\n**Signal Handling (lines 402-418):**\n- Receives SIGINT/SIGTERM on channel (line 405)\n- Calls `srv.Shutdown(ctx)` (line 415)\n- Calls `util.FsWatcherShutdown()` (line 416)\n- Calls `taskmanager.Shutdown()` (line 417)\n- Waits for all goroutines to complete via `wg.Wait()` (lines 428-431)\n\n**Key Timeouts:**\n- HTTP server shutdown: **30 seconds** (line 420 in `server.go`)\n- Archiver shutdown: **10 seconds** (line 441 in `server.go`)\n- NO TIMEOUT on metricstore shutdown (line 437 in `server.go` - **THIS IS BLOCKING**)\n\n---\n\n### 2. **SERVER SHUTDOWN** (`cmd/cc-backend/server.go:418-444`)\n\n**Current Implementation:**\n```go\nfunc (s *Server) Shutdown(ctx context.Context) {\n    shutdownCtx, cancel := context.WithTimeout(ctx, 30*time.Second)\n    defer cancel()\n    \n    // 1. Close NATS client (line 425)\n    // 2. HTTP server graceful shutdown with 30s timeout (lines 429-431)\n    // 3. metricstore.Shutdown() - NO TIMEOUT (line 437) ⚠️\n    // 4. archiver.Shutdown(10s) (line 441)\n}\n```\n\n**Problem Areas:**\n- **metricstore.Shutdown()** (line 437) has **NO TIMEOUT** and performs blocking I/O operations\n- This function writes final checkpoint files synchronously, which can take significant time\n\n---\n\n### 3. **METRICSTORE SHUTDOWN** (`pkg/metricstore/metricstore.go:273-310`)\n\n**Key Steps:**\n1. Cancels context to stop all background workers (lines 276-278)\n2. **Closes WAL shard channels** (lines 280-283) - triggers shutdown of all WAL staging goroutines\n3. **Writes final checkpoint** (lines 296-304) - **THIS IS BLOCKING AND CAN BE SLOW**\n   - Calls `ms.ToCheckpointWAL()` for binary format (line 298)\n   - Calls `RotateWALFilesAfterShutdown()` (line 300)\n\n**The WAL Checkpoint Problem:**\n- `ToCheckpointWAL()` (walCheckpoint.go:627-702) uses a worker pool (line 663)\n- Creates worker goroutines with `Keys.NumWorkers` workers (line 663)\n- Each worker processes serialization of metric data to binary snapshot files\n- This is parallel I/O-heavy work with **NO TIMEOUT**\n- On shutdown, this must complete fully before returning\n\n---\n\n### 4. **WAL STAGING WORKER POOL** (`pkg/metricstore/walCheckpoint.go:154-320`)\n\n**Recent Change (commit 0325d9e8 - \"fix: Increase throughput for WAL writers\"):**\n\nThe change modified the WAL staging implementation to:\n- **Before:** Flushed immediately after every batch of ~256 messages\n- **After:** Uses a 5-second timer (`walFlushInterval`) for periodic flushing (line 123)\n- Added `drainBatch()` function that processes up to 4096 messages per batch (line 278-296)\n\n**Architecture:**\n- Creates `Keys.NumWorkers` sharded worker goroutines (lines 162-319)\n- Each shard owns a subset of hosts (determined by FNV-1a hash)\n- Each worker maintains `hostFiles` map with open file handles\n- Workers process messages from buffered channels (capacity: `65536/walNumShards`)\n\n**Shutdown Sequence:**\n1. Closes all WAL shard channels (main.go line 281-283)\n2. Triggers `drain()` function on each worker (line 301)\n3. Drain tries to process remaining messages in \"drainBatch\" pattern\n4. **Problem:** If channels still have pending messages, `drain()` will block processing them all\n\n---\n\n### 5. **ARCHIVER SHUTDOWN** (`internal/archiver/archiveWorker.go:196-250`)\n\n**Has proper timeout handling:**\n```go\nfunc Shutdown(timeout time.Duration) error {\n    close(archiveChannel)           // line 226\n    done := make(chan struct{})\n    go func() {\n        archivePending.Wait()       // Wait for pending jobs\n        close(done)\n    }()\n    \n    select {\n    case <-done:                    // All jobs completed\n        <-workerDone                // Wait for worker exit\n        return nil\n    case <-time.After(timeout):     // Timeout exceeded\n        shutdownCancel()            // Cancel ongoing operations\n        <-workerDone                // Wait for worker to exit\n        return fmt.Errorf(\"...\")\n    }\n}\n```\n\n**Called with 10s timeout** (server.go:441)\n\n---\n\n### 6. **TASKMANAGER SHUTDOWN** (`internal/taskmanager/taskManager.go:164-169`)\n\n**Simple implementation:**\n```go\nfunc Shutdown() {\n    if s != nil {\n        s.Shutdown()  // gocron scheduler shutdown (blocking)\n    }\n}\n```\n\n**No timeout specified** - delegates to gocron scheduler\n\n---\n\n### 7. **NATS API WORKER POOL** (`internal/api/nats.go:83-157`)\n\n**Architecture:**\n- Creates `JobConcurrency` job worker goroutines (line 105-107, default 8)\n- Creates `NodeConcurrency` node worker goroutines (line 108-110, default 2)\n- Uses buffered channels for message routing\n- **No explicit shutdown in the code** - relies on channel closure during context cancellation\n\n**Goroutines:**\n- `jobWorker()` processes job events (lines 116-120)\n- `nodeWorker()` processes node state (lines 123-127)\n- Created during `NewNatsAPI()` (lines 105-110)\n- Workers run indefinitely until channel closes\n\n---\n\n### 8. **IDENTIFIED TIMEOUT VALUES**\n\n| Component | Timeout | Location | Issue |\n|-----------|---------|----------|-------|\n| HTTP Server Shutdown | 30s | server.go:420 | Uses dedicated timeout, OK |\n| Archiver Shutdown | 10s | server.go:441 | Explicit timeout, OK |\n| Metricstore Shutdown | **NONE** | server.go:437 | **NO TIMEOUT - CAN BLOCK** |\n| WAL Final Checkpoint | **NONE** | metricstore.go:298 | **NO TIMEOUT - BLOCKING I/O** |\n| Taskmanager Shutdown | **NONE** | main.go:417 | Delegates to gocron, may block |\n\n---\n\n### 9. **ROOT CAUSE ANALYSIS**\n\n**Why shutdown takes ~40s instead of ~10s:**\n\n1. **metricstore.Shutdown()** is called without timeout (server.go:437)\n2. This function performs `ToCheckpointWAL()` which:\n   - Creates worker pool with `Keys.NumWorkers` workers\n   - Each worker serializes potentially GB-scale metric data to binary files\n   - Uses parallel I/O with `sync.WaitGroup` blocking until all workers complete\n   - Can take 20-30+ seconds on large metric datasets\n3. There's **no cancellation mechanism** if checkpoint takes too long\n4. During shutdown, the HTTP server gets 30s timeout, but everything after metricstore shutdown gets no timeout\n\n**Why the recent WAL commit might have worsened this:**\n- The commit increased throughput by batching messages and using periodic flushing\n- This accumulates more in-flight messages in channels\n- On shutdown, the `drain()` function must process all accumulated messages\n- This increases the backlog that must be drained during shutdown\n\n---\n\n### 10. **SHUTDOWN SEQUENCE TIMELINE**\n\n```\nSignal received (t=0)\n↓\nsrv.Shutdown(ctx) starts (30s timeout on HTTP graceful shutdown)\n    ├─ NATS client closes\n    └─ HTTP server waits for ongoing requests\n↓\nutil.FsWatcherShutdown() (no timeout)\n↓\nmetricstore.Shutdown() starts (NO TIMEOUT) ⚠️\n    ├─ Cancels context (stops background workers)\n    ├─ Closes WAL shard channels\n    ├─ Calls ToCheckpointWAL() (BLOCKING, worker pool, I/O intensive) ⚠️\n    │   └─ Creates NumWorkers goroutines\n    │   └─ Each serializes metric data to disk\n    │   └─ Waits for all with sync.WaitGroup\n    └─ Calls RotateWALFilesAfterShutdown()\n↓\ntaskmanager.Shutdown() (no timeout)\n    └─ gocron.Shutdown() (blocking)\n↓\narchiver.Shutdown(10s) (10s timeout)\n↓\nwg.Wait() for all goroutines (blocking)\n↓\nDone (t=~40s)\n```\n\n---\n\n### **ABSOLUTE FILE PATHS & LINE NUMBERS**\n\n**Shutdown Entry Points:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go:339-463` - runServer()\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go:402-418` - Signal handling\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go:418-444` - Server.Shutdown()\n\n**Metricstore Shutdown (CRITICAL SECTION):**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go:273-310` - Shutdown()\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go:627-702` - ToCheckpointWAL()\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go:154-320` - WALStaging() worker pool\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go:322-340` - RotateWALFiles()\n\n**Archiver Shutdown:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:196-250` - Shutdown()\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:71-92` - Start()\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go:110-171` - archivingWorker()\n\n**NATS API Worker Pool:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/api/nats.go:83-113` - NewNatsAPI()\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/api/nats.go:105-110` - Worker goroutine creation\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/api/nats.go:116-127` - Worker functions\n\n**Taskmanager Shutdown:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/taskmanager/taskManager.go:103-145` - Start()\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/taskmanager/taskManager.go:164-169` - Shutdown()\n\n---\n\n### **RECOMMENDATIONS**\n\n1. **Add timeout to metricstore.Shutdown()** - Currently has no mechanism to interrupt if checkpoint takes too long\n2. **Drain WAL channels with timeout during shutdown** - The drain() function can block indefinitely on channels\n3. **Make final checkpoint optional or configurable** - For fast shutdowns, allow skipping the final checkpoint\n4. **Monitor TOCheckpointWAL() performance** - This worker pool I/O operation is the bottleneck\n5. **Add NATS worker pool shutdown** - Currently no explicit shutdown for NATS API workers\n6. **Add taskmanager shutdown timeout** - Delegate to gocron may block indefinitely"}],"totalDurationMs":66730,"totalTokens":80252,"totalToolUseCount":32,"usage":{"input_tokens":0,"cache_creation_input_tokens":896,"cache_read_input_tokens":76173,"output_tokens":3183,"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":896},"inference_geo":"","iterations":[],"speed":"standard"}},"sourceToolAssistantUUID":"311d2796-2e7e-43f4-afcb-4907f870af13","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"bb048cf4-aae7-4d1b-8e6f-58a5cf03c864","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01RFmxVdQK4RXAv6C6Bog8d6","type":"message","role":"assistant","content":[{"type":"thinking","thinking":"","signature":"Eq8CCkYIDBgCKkB1OXDmJ8w4I2H4UmnXZQz6dowOECXpTbV2jhk7Aoc+JyWQvk5r3mK3J5VAX7Np8VukyPwd1Ys9Vzz9D1e2wyAuEgyZ8e8/osOs8ajzeqUaDL5jWYSVGUd3Wkm4ACIwWjddij0LPr7lJSfGtvUZEDg90qPQPMJWfz7EpCTmZ5Kq3XYeSI8MRZHmo/f1/dOIKpYBqueviqIeryvAAtnzF4XCFuwf+LQ44Aug37kptm4lFv4TwUt/WspGkIuUQVcHqWMK17IEh8YKp8nCpwII0UbcIkESsGXCAh8CqGQb6t3icw8a2itvl+k5S0sNeYcrXXzsi4XMyVEnn7+UVs3cYU43eOvW9XJknALD+zSexGDYo7a4Uw9wCLNker4dqJONmNzj2HEDQO5xGAE="}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":3642,"cache_read_input_tokens":20880,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":3642},"output_tokens":8,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZMQfh2emoe3MGFMVtVVF","type":"assistant","uuid":"3c7f2690-c13c-4dbe-93e8-9af77983b7d4","timestamp":"2026-03-24T06:10:58.993Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"3c7f2690-c13c-4dbe-93e8-9af77983b7d4","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01RFmxVdQK4RXAv6C6Bog8d6","type":"message","role":"assistant","content":[{"type":"text","text":"Let me read the critical shutdown code sections to verify the findings."}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":3642,"cache_read_input_tokens":20880,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":3642},"output_tokens":8,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZMQfh2emoe3MGFMVtVVF","type":"assistant","uuid":"9538c45b-85fd-4004-ae96-f1c6a79d1409","timestamp":"2026-03-24T06:10:59.431Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"9538c45b-85fd-4004-ae96-f1c6a79d1409","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01RFmxVdQK4RXAv6C6Bog8d6","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01A7PubzHwSMwwVcdfCtq1jV","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go","offset":415,"limit":35},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":3642,"cache_read_input_tokens":20880,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":3642},"output_tokens":8,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZMQfh2emoe3MGFMVtVVF","type":"assistant","uuid":"6b997bf2-92ee-43f1-b314-ded03e255b45","timestamp":"2026-03-24T06:11:00.818Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"6b997bf2-92ee-43f1-b314-ded03e255b45","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Read","command":"callback"},"parentToolUseID":"toolu_01A7PubzHwSMwwVcdfCtq1jV","toolUseID":"toolu_01A7PubzHwSMwwVcdfCtq1jV","timestamp":"2026-03-24T06:11:00.823Z","uuid":"f2be40d3-030b-4489-b4f3-db7acfcb1b2d","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"6b997bf2-92ee-43f1-b314-ded03e255b45","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01A7PubzHwSMwwVcdfCtq1jV","type":"tool_result","content":"   415→\treturn nil\n   416→}\n   417→\n   418→func (s *Server) Shutdown(ctx context.Context) {\n   419→\t// Create a shutdown context with timeout\n   420→\tshutdownCtx, cancel := context.WithTimeout(ctx, 30*time.Second)\n   421→\tdefer cancel()\n   422→\n   423→\tnc := nats.GetClient()\n   424→\tif nc != nil {\n   425→\t\tnc.Close()\n   426→\t}\n   427→\n   428→\t// First shut down the server gracefully (waiting for all ongoing requests)\n   429→\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n   430→\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n   431→\t}\n   432→\n   433→\t// Archive all the metric store data\n   434→\tms := metricstore.GetMemoryStore()\n   435→\n   436→\tif ms != nil {\n   437→\t\tmetricstore.Shutdown()\n   438→\t}\n   439→\n   440→\t// Shutdown archiver with 10 second timeout for fast shutdown\n   441→\tif err := archiver.Shutdown(10 * time.Second); err != nil {\n   442→\t\tcclog.Warnf(\"Archiver shutdown: %v\", err)\n   443→\t}\n   444→}\n   445→"}]},"uuid":"2fa6ced9-cd3a-4b97-83d8-56b1b1bd19f9","timestamp":"2026-03-24T06:11:00.823Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go","content":"\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","numLines":31,"startLine":415,"totalLines":445}},"sourceToolAssistantUUID":"6b997bf2-92ee-43f1-b314-ded03e255b45","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"2fa6ced9-cd3a-4b97-83d8-56b1b1bd19f9","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01RFmxVdQK4RXAv6C6Bog8d6","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_012Ua6kPVWh6M9WzGbUKJQkC","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go","offset":270,"limit":45},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":3642,"cache_read_input_tokens":20880,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":3642},"output_tokens":8,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZMQfh2emoe3MGFMVtVVF","type":"assistant","uuid":"49916149-70ee-4f8f-9157-f16e0b11f32c","timestamp":"2026-03-24T06:11:01.253Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"49916149-70ee-4f8f-9157-f16e0b11f32c","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Read","command":"callback"},"parentToolUseID":"toolu_012Ua6kPVWh6M9WzGbUKJQkC","toolUseID":"toolu_012Ua6kPVWh6M9WzGbUKJQkC","timestamp":"2026-03-24T06:11:01.269Z","uuid":"3e934610-ea58-47c2-9106-5a80cc3cd51c","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"49916149-70ee-4f8f-9157-f16e0b11f32c","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_012Ua6kPVWh6M9WzGbUKJQkC","type":"tool_result","content":"   270→//  4. Log any errors encountered during shutdown\n   271→//\n   272→// Note: This function blocks until the final checkpoint is written.\n   273→func Shutdown() {\n   274→\tshutdownFuncMu.Lock()\n   275→\tdefer shutdownFuncMu.Unlock()\n   276→\tif shutdownFunc != nil {\n   277→\t\tshutdownFunc()\n   278→\t}\n   279→\n   280→\tif Keys.Checkpoints.FileFormat == \"wal\" {\n   281→\t\tfor _, ch := range walShardChs {\n   282→\t\t\tclose(ch)\n   283→\t\t}\n   284→\t}\n   285→\n   286→\tcclog.Infof(\"[METRICSTORE]> Writing to '%s'...\\n\", Keys.Checkpoints.RootDir)\n   287→\tvar files int\n   288→\tvar err error\n   289→\n   290→\tms := GetMemoryStore()\n   291→\n   292→\tlastCheckpointMu.Lock()\n   293→\tfrom := lastCheckpoint\n   294→\tlastCheckpointMu.Unlock()\n   295→\n   296→\tif Keys.Checkpoints.FileFormat == \"wal\" {\n   297→\t\tvar hostDirs []string\n   298→\t\tfiles, hostDirs, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n   299→\t\tif err == nil {\n   300→\t\t\tRotateWALFilesAfterShutdown(hostDirs)\n   301→\t\t}\n   302→\t} else {\n   303→\t\tfiles, err = ms.ToCheckpoint(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n   304→\t}\n   305→\n   306→\tif err != nil {\n   307→\t\tcclog.Errorf(\"[METRICSTORE]> Writing checkpoint failed: %s\\n\", err.Error())\n   308→\t}\n   309→\tcclog.Infof(\"[METRICSTORE]> Done! (%d files written)\\n\", files)\n   310→}\n   311→\n   312→// Retention starts a background goroutine that periodically frees old metric data.\n   313→//\n   314→// This worker runs at half the retention interval and calls Free() to remove buffers"}]},"uuid":"b4e32ef5-6950-4480-9a88-40eb04e4620f","timestamp":"2026-03-24T06:11:01.268Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go","content":"//  4. Log any errors encountered during shutdown\n//\n// Note: This function blocks until the final checkpoint is written.\nfunc Shutdown() {\n\tshutdownFuncMu.Lock()\n\tdefer shutdownFuncMu.Unlock()\n\tif shutdownFunc != nil {\n\t\tshutdownFunc()\n\t}\n\n\tif Keys.Checkpoints.FileFormat == \"wal\" {\n\t\tfor _, ch := range walShardChs {\n\t\t\tclose(ch)\n\t\t}\n\t}\n\n\tcclog.Infof(\"[METRICSTORE]> Writing to '%s'...\\n\", Keys.Checkpoints.RootDir)\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\tvar hostDirs []string\n\t\tfiles, hostDirs, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n\t\tif err == nil {\n\t\t\tRotateWALFilesAfterShutdown(hostDirs)\n\t\t}\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\\n\", err.Error())\n\t}\n\tcclog.Infof(\"[METRICSTORE]> Done! (%d files written)\\n\", files)\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","numLines":45,"startLine":270,"totalLines":804}},"sourceToolAssistantUUID":"49916149-70ee-4f8f-9157-f16e0b11f32c","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"b4e32ef5-6950-4480-9a88-40eb04e4620f","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01RFmxVdQK4RXAv6C6Bog8d6","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01Vi3akAApToJxa5PactTLLQ","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go","offset":150,"limit":180},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":3642,"cache_read_input_tokens":20880,"output_tokens":363,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":3642,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZMQfh2emoe3MGFMVtVVF","type":"assistant","uuid":"9b7e0942-47b1-4aad-aa07-bacec7128e6e","timestamp":"2026-03-24T06:11:02.220Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"9b7e0942-47b1-4aad-aa07-bacec7128e6e","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Read","command":"callback"},"parentToolUseID":"toolu_01Vi3akAApToJxa5PactTLLQ","toolUseID":"toolu_01Vi3akAApToJxa5PactTLLQ","timestamp":"2026-03-24T06:11:02.227Z","uuid":"a42ff442-eb50-4c51-b8f5-98e3ab1d71dd","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"9b7e0942-47b1-4aad-aa07-bacec7128e6e","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01Vi3akAApToJxa5PactTLLQ","type":"tool_result","content":"   150→// WALStaging starts N sharded background goroutines that receive WALMessage items\n   151→// and append binary WAL records to per-host current.wal files.\n   152→// Each shard owns a subset of hosts (determined by hash of cluster+node),\n   153→// parallelizing serialization and I/O while keeping per-host writes serial.\n   154→func WALStaging(wg *sync.WaitGroup, ctx context.Context) {\n   155→\tif Keys.Checkpoints.FileFormat == \"json\" {\n   156→\t\treturn\n   157→\t}\n   158→\n   159→\twalNumShards = max(Keys.NumWorkers, 1)\n   160→\tchBufSize := max(65536/walNumShards, 1024)\n   161→\n   162→\twalShardChs = make([]chan *WALMessage, walNumShards)\n   163→\twalShardRotateChs = make([]chan walRotateReq, walNumShards)\n   164→\n   165→\tfor i := range walNumShards {\n   166→\t\twalShardChs[i] = make(chan *WALMessage, chBufSize)\n   167→\t\twalShardRotateChs[i] = make(chan walRotateReq, 64)\n   168→\t}\n   169→\n   170→\tfor i := range walNumShards {\n   171→\t\tmsgCh := walShardChs[i]\n   172→\t\trotateCh := walShardRotateChs[i]\n   173→\n   174→\t\twg.Go(func() {\n   175→\t\t\thostFiles := make(map[string]*walFileState)\n   176→\n   177→\t\t\tdefer func() {\n   178→\t\t\t\tfor _, ws := range hostFiles {\n   179→\t\t\t\t\tif ws.f != nil {\n   180→\t\t\t\t\t\tws.w.Flush()\n   181→\t\t\t\t\t\tws.f.Close()\n   182→\t\t\t\t\t}\n   183→\t\t\t\t}\n   184→\t\t\t}()\n   185→\n   186→\t\t\tgetOrOpenWAL := func(hostDir string) *walFileState {\n   187→\t\t\t\tws, ok := hostFiles[hostDir]\n   188→\t\t\t\tif ok {\n   189→\t\t\t\t\treturn ws\n   190→\t\t\t\t}\n   191→\n   192→\t\t\t\tif err := os.MkdirAll(hostDir, CheckpointDirPerms); err != nil {\n   193→\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: mkdir %s: %v\", hostDir, err)\n   194→\t\t\t\t\treturn nil\n   195→\t\t\t\t}\n   196→\n   197→\t\t\t\twalPath := path.Join(hostDir, \"current.wal\")\n   198→\t\t\t\tf, err := os.OpenFile(walPath, os.O_CREATE|os.O_APPEND|os.O_WRONLY, CheckpointFilePerms)\n   199→\t\t\t\tif err != nil {\n   200→\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: open %s: %v\", walPath, err)\n   201→\t\t\t\t\treturn nil\n   202→\t\t\t\t}\n   203→\n   204→\t\t\t\tw := bufio.NewWriter(f)\n   205→\n   206→\t\t\t\t// Write file header magic if file is new (empty).\n   207→\t\t\t\tinfo, err := f.Stat()\n   208→\t\t\t\tif err == nil && info.Size() == 0 {\n   209→\t\t\t\t\tvar hdr [4]byte\n   210→\t\t\t\t\tbinary.LittleEndian.PutUint32(hdr[:], walFileMagic)\n   211→\t\t\t\t\tif _, err := w.Write(hdr[:]); err != nil {\n   212→\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: write header %s: %v\", walPath, err)\n   213→\t\t\t\t\t\tf.Close()\n   214→\t\t\t\t\t\treturn nil\n   215→\t\t\t\t\t}\n   216→\t\t\t\t}\n   217→\n   218→\t\t\t\tws = &walFileState{f: f, w: w}\n   219→\t\t\t\thostFiles[hostDir] = ws\n   220→\t\t\t\treturn ws\n   221→\t\t\t}\n   222→\n   223→\t\t\tprocessMsg := func(msg *WALMessage) {\n   224→\t\t\t\thostDir := path.Join(Keys.Checkpoints.RootDir, msg.Cluster, msg.Node)\n   225→\t\t\t\tws := getOrOpenWAL(hostDir)\n   226→\t\t\t\tif ws == nil {\n   227→\t\t\t\t\treturn\n   228→\t\t\t\t}\n   229→\t\t\t\tif err := writeWALRecordDirect(ws.w, msg); err != nil {\n   230→\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: write record: %v\", err)\n   231→\t\t\t\t}\n   232→\t\t\t\tws.dirty = true\n   233→\t\t\t}\n   234→\n   235→\t\t\tprocessRotate := func(req walRotateReq) {\n   236→\t\t\t\tws, ok := hostFiles[req.hostDir]\n   237→\t\t\t\tif ok && ws.f != nil {\n   238→\t\t\t\t\tws.w.Flush()\n   239→\t\t\t\t\tws.f.Close()\n   240→\t\t\t\t\twalPath := path.Join(req.hostDir, \"current.wal\")\n   241→\t\t\t\t\tif err := os.Remove(walPath); err != nil && !os.IsNotExist(err) {\n   242→\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: remove %s: %v\", walPath, err)\n   243→\t\t\t\t\t}\n   244→\t\t\t\t\tdelete(hostFiles, req.hostDir)\n   245→\t\t\t\t}\n   246→\t\t\t\tclose(req.done)\n   247→\t\t\t}\n   248→\n   249→\t\t\tflushDirty := func() {\n   250→\t\t\t\tfor _, ws := range hostFiles {\n   251→\t\t\t\t\tif ws.dirty {\n   252→\t\t\t\t\t\tws.w.Flush()\n   253→\t\t\t\t\t\tws.dirty = false\n   254→\t\t\t\t\t}\n   255→\t\t\t\t}\n   256→\t\t\t}\n   257→\n   258→\t\t\tdrain := func() {\n   259→\t\t\t\tfor {\n   260→\t\t\t\t\tselect {\n   261→\t\t\t\t\tcase msg, ok := <-msgCh:\n   262→\t\t\t\t\t\tif !ok {\n   263→\t\t\t\t\t\t\treturn\n   264→\t\t\t\t\t\t}\n   265→\t\t\t\t\t\tprocessMsg(msg)\n   266→\t\t\t\t\tcase req := <-rotateCh:\n   267→\t\t\t\t\t\tprocessRotate(req)\n   268→\t\t\t\t\tdefault:\n   269→\t\t\t\t\t\tflushDirty()\n   270→\t\t\t\t\t\treturn\n   271→\t\t\t\t\t}\n   272→\t\t\t\t}\n   273→\t\t\t}\n   274→\n   275→\t\t\tticker := time.NewTicker(walFlushInterval)\n   276→\t\t\tdefer ticker.Stop()\n   277→\n   278→\t\t\t// drainBatch processes up to 4096 pending messages without blocking.\n   279→\t\t\t// Returns false if the channel was closed.\n   280→\t\t\tdrainBatch := func() bool {\n   281→\t\t\t\tfor range 4096 {\n   282→\t\t\t\t\tselect {\n   283→\t\t\t\t\tcase msg, ok := <-msgCh:\n   284→\t\t\t\t\t\tif !ok {\n   285→\t\t\t\t\t\t\tflushDirty()\n   286→\t\t\t\t\t\t\treturn false\n   287→\t\t\t\t\t\t}\n   288→\t\t\t\t\t\tprocessMsg(msg)\n   289→\t\t\t\t\tcase req := <-rotateCh:\n   290→\t\t\t\t\t\tprocessRotate(req)\n   291→\t\t\t\t\tdefault:\n   292→\t\t\t\t\t\treturn true\n   293→\t\t\t\t\t}\n   294→\t\t\t\t}\n   295→\t\t\t\treturn true\n   296→\t\t\t}\n   297→\n   298→\t\t\tfor {\n   299→\t\t\t\tselect {\n   300→\t\t\t\tcase <-ctx.Done():\n   301→\t\t\t\t\tdrain()\n   302→\t\t\t\t\treturn\n   303→\t\t\t\tcase msg, ok := <-msgCh:\n   304→\t\t\t\t\tif !ok {\n   305→\t\t\t\t\t\treturn\n   306→\t\t\t\t\t}\n   307→\t\t\t\t\tprocessMsg(msg)\n   308→\t\t\t\t\tif !drainBatch() {\n   309→\t\t\t\t\t\treturn\n   310→\t\t\t\t\t}\n   311→\t\t\t\t\t// No flush here — timer handles periodic flushing.\n   312→\t\t\t\tcase <-ticker.C:\n   313→\t\t\t\t\tflushDirty()\n   314→\t\t\t\tcase req := <-rotateCh:\n   315→\t\t\t\t\tprocessRotate(req)\n   316→\t\t\t\t}\n   317→\t\t\t}\n   318→\t\t})\n   319→\t}\n   320→}\n   321→\n   322→// RotateWALFiles sends rotation requests for the given host directories\n   323→// and blocks until all rotations complete. Each request is routed to the\n   324→// shard that owns the host directory.\n   325→func RotateWALFiles(hostDirs []string) {\n   326→\tif walShardRotateChs == nil {\n   327→\t\treturn\n   328→\t}\n   329→\tdones := make([]chan struct{}, len(hostDirs))"}]},"uuid":"2af3e9d4-f0b6-4abd-9665-4d0c627e5414","timestamp":"2026-03-24T06:11:02.227Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go","content":"// 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\twg.Go(func() {\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\tif err == nil && info.Size() == 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}\n\n\t\t\t\tws = &walFileState{f: f, w: w}\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\t\t\t\tif err := writeWALRecordDirect(ws.w, msg); 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.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\tdrain := func() {\n\t\t\t\tfor {\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\treturn\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\tflushDirty()\n\t\t\t\t\t\treturn\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\tdrain()\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// 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.\nfunc RotateWALFiles(hostDirs []string) {\n\tif walShardRotateChs == nil {\n\t\treturn\n\t}\n\tdones := make([]chan struct{}, len(hostDirs))","numLines":180,"startLine":150,"totalLines":924}},"sourceToolAssistantUUID":"9b7e0942-47b1-4aad-aa07-bacec7128e6e","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"2af3e9d4-f0b6-4abd-9665-4d0c627e5414","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01EJAwLuZ1fq16N49quf7vpL","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_018hMtpLo3ECbM6tZAJfYhAP","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go","offset":620,"limit":90},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":3651,"cache_read_input_tokens":24522,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":3651},"output_tokens":69,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZMQgHaY5N7RKx71LbsZD","type":"assistant","uuid":"620e9d44-7cd5-4b9a-a0e3-3d996c0a94bd","timestamp":"2026-03-24T06:11:09.981Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"620e9d44-7cd5-4b9a-a0e3-3d996c0a94bd","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Read","command":"callback"},"parentToolUseID":"toolu_018hMtpLo3ECbM6tZAJfYhAP","toolUseID":"toolu_018hMtpLo3ECbM6tZAJfYhAP","timestamp":"2026-03-24T06:11:09.991Z","uuid":"73c040d9-cf74-420c-9435-a63d75d16c34","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"620e9d44-7cd5-4b9a-a0e3-3d996c0a94bd","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_018hMtpLo3ECbM6tZAJfYhAP","type":"tool_result","content":"   620→\t}\n   621→\treturn result.String()\n   622→}\n   623→\n   624→// ToCheckpointWAL writes binary snapshot files for all hosts in parallel.\n   625→// Returns the number of files written, the list of host directories that were\n   626→// successfully checkpointed (for WAL rotation), and any errors.\n   627→func (m *MemoryStore) ToCheckpointWAL(dir string, from, to int64) (int, []string, error) {\n   628→\t// Collect all cluster/host pairs.\n   629→\tm.root.lock.RLock()\n   630→\ttotalHosts := 0\n   631→\tfor _, l1 := range m.root.children {\n   632→\t\tl1.lock.RLock()\n   633→\t\ttotalHosts += len(l1.children)\n   634→\t\tl1.lock.RUnlock()\n   635→\t}\n   636→\tm.root.lock.RUnlock()\n   637→\n   638→\tlevels := make([]*Level, 0, totalHosts)\n   639→\tselectors := make([][]string, 0, totalHosts)\n   640→\n   641→\tm.root.lock.RLock()\n   642→\tfor sel1, l1 := range m.root.children {\n   643→\t\tl1.lock.RLock()\n   644→\t\tfor sel2, l2 := range l1.children {\n   645→\t\t\tlevels = append(levels, l2)\n   646→\t\t\tselectors = append(selectors, []string{sel1, sel2})\n   647→\t\t}\n   648→\t\tl1.lock.RUnlock()\n   649→\t}\n   650→\tm.root.lock.RUnlock()\n   651→\n   652→\ttype workItem struct {\n   653→\t\tlevel    *Level\n   654→\t\thostDir  string\n   655→\t\tselector []string\n   656→\t}\n   657→\n   658→\tn, errs := int32(0), int32(0)\n   659→\tvar successDirs []string\n   660→\tvar successMu sync.Mutex\n   661→\n   662→\tvar wg sync.WaitGroup\n   663→\twg.Add(Keys.NumWorkers)\n   664→\twork := make(chan workItem, Keys.NumWorkers*2)\n   665→\n   666→\tfor range Keys.NumWorkers {\n   667→\t\tgo func() {\n   668→\t\t\tdefer wg.Done()\n   669→\t\t\tfor wi := range work {\n   670→\t\t\t\terr := wi.level.toCheckpointBinary(wi.hostDir, from, to, m)\n   671→\t\t\t\tif err != nil {\n   672→\t\t\t\t\tif err == ErrNoNewArchiveData {\n   673→\t\t\t\t\t\tcontinue\n   674→\t\t\t\t\t}\n   675→\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> binary checkpoint error for %s: %v\", wi.hostDir, err)\n   676→\t\t\t\t\tatomic.AddInt32(&errs, 1)\n   677→\t\t\t\t} else {\n   678→\t\t\t\t\tatomic.AddInt32(&n, 1)\n   679→\t\t\t\t\tsuccessMu.Lock()\n   680→\t\t\t\t\tsuccessDirs = append(successDirs, wi.hostDir)\n   681→\t\t\t\t\tsuccessMu.Unlock()\n   682→\t\t\t\t}\n   683→\t\t\t}\n   684→\t\t}()\n   685→\t}\n   686→\n   687→\tfor i := range levels {\n   688→\t\thostDir := path.Join(dir, path.Join(selectors[i]...))\n   689→\t\twork <- workItem{\n   690→\t\t\tlevel:    levels[i],\n   691→\t\t\thostDir:  hostDir,\n   692→\t\t\tselector: selectors[i],\n   693→\t\t}\n   694→\t}\n   695→\tclose(work)\n   696→\twg.Wait()\n   697→\n   698→\tif errs > 0 {\n   699→\t\treturn int(n), successDirs, fmt.Errorf(\"[METRICSTORE]> %d errors during binary checkpoint (%d successes)\", errs, n)\n   700→\t}\n   701→\treturn int(n), successDirs, nil\n   702→}\n   703→\n   704→// toCheckpointBinary writes a binary snapshot file for a single host-level node.\n   705→// Uses atomic rename (write to .tmp then rename) to avoid partial reads on crash.\n   706→func (l *Level) toCheckpointBinary(dir string, from, to int64, m *MemoryStore) error {\n   707→\tcf, err := l.toCheckpointFile(from, to, m)\n   708→\tif err != nil {\n   709→\t\treturn err"}]},"uuid":"290dca07-64b2-401e-b090-0336fac33658","timestamp":"2026-03-24T06:11:09.990Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go","content":"\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\tn, errs := 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\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\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}\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\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","numLines":90,"startLine":620,"totalLines":924}},"sourceToolAssistantUUID":"620e9d44-7cd5-4b9a-a0e3-3d996c0a94bd","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"290dca07-64b2-401e-b090-0336fac33658","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01EJAwLuZ1fq16N49quf7vpL","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_018JH3uu6YpfdMNXkj5UhU4s","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go","offset":395,"limit":50},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":3651,"cache_read_input_tokens":24522,"output_tokens":211,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":3651,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZMQgHaY5N7RKx71LbsZD","type":"assistant","uuid":"1a700a23-ccf1-49d4-8fe9-a2e1d487e7d9","timestamp":"2026-03-24T06:11:10.688Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"1a700a23-ccf1-49d4-8fe9-a2e1d487e7d9","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Read","command":"callback"},"parentToolUseID":"toolu_018JH3uu6YpfdMNXkj5UhU4s","toolUseID":"toolu_018JH3uu6YpfdMNXkj5UhU4s","timestamp":"2026-03-24T06:11:10.721Z","uuid":"9850f1aa-f412-4c90-8ea4-d0545eb10b7e","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"1a700a23-ccf1-49d4-8fe9-a2e1d487e7d9","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_018JH3uu6YpfdMNXkj5UhU4s","type":"tool_result","content":"   395→\t// Start HTTP server\n   396→\twg.Go(func() {\n   397→\t\tif err := srv.Start(ctx); err != nil {\n   398→\t\t\terrChan <- err\n   399→\t\t}\n   400→\t})\n   401→\n   402→\t// Handle shutdown signals\n   403→\twg.Add(1)\n   404→\tsigs := make(chan os.Signal, 1)\n   405→\tsignal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)\n   406→\tgo func() {\n   407→\t\tdefer wg.Done()\n   408→\t\tselect {\n   409→\t\tcase <-sigs:\n   410→\t\t\tcclog.Info(\"Shutdown signal received\")\n   411→\t\tcase <-ctx.Done():\n   412→\t\t}\n   413→\n   414→\t\truntime.SystemdNotify(false, \"Shutting down ...\")\n   415→\t\tsrv.Shutdown(ctx)\n   416→\t\tutil.FsWatcherShutdown()\n   417→\t\ttaskmanager.Shutdown()\n   418→\t}()\n   419→\n   420→\t// Set GC percent if not configured\n   421→\tif os.Getenv(envGOGC) == \"\" {\n   422→\t\t// trigger GC when heap grows 15% above the previous live set\n   423→\t\tdebug.SetGCPercent(15)\n   424→\t}\n   425→\truntime.SystemdNotify(true, \"running\")\n   426→\n   427→\twaitDone := make(chan struct{})\n   428→\tgo func() {\n   429→\t\twg.Wait()\n   430→\t\tclose(waitDone)\n   431→\t}()\n   432→\n   433→\tgo func() {\n   434→\t\t<-waitDone\n   435→\t\tclose(errChan)\n   436→\t}()\n   437→\n   438→\t// Wait for either:\n   439→\t// 1. An error from server startup\n   440→\t// 2. Completion of all goroutines (normal shutdown or crash)\n   441→\tselect {\n   442→\tcase err := <-errChan:\n   443→\t\t// errChan will be closed when waitDone is closed, which happens\n   444→\t\t// when all goroutines complete (either from normal shutdown or error)"}]},"uuid":"fb83f626-b22d-4c57-92f2-260cf68a4e61","timestamp":"2026-03-24T06:11:10.720Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go","content":"\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)","numLines":50,"startLine":395,"totalLines":595}},"sourceToolAssistantUUID":"1a700a23-ccf1-49d4-8fe9-a2e1d487e7d9","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"fb83f626-b22d-4c57-92f2-260cf68a4e61","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01LKFeWTdVYsah8SMydPXjeA","type":"message","role":"assistant","content":[{"type":"thinking","thinking":"","signature":"EqMCCkYIDBgCKkDvWoaj7j6KFkQ+fuHPkEUNbMctsgJW5ItvLB7arMUcuo90HPjcckeKw55PlnSayWar9M7YuXa4yCT/U4v+yD0HEgyYQ6+7AV/kL45B/BAaDP6QeElteNc35tUHuCIwnBt+g0/CYNqK2bTbS7n6ibuVALX35pLCzHC6yHvqtodrzk+MaMfWqeLdX3e6retsKooB43sNT4cnPZNuLlqUtpYUKOvASRBwDrAKnGB/CnZa5/kEtWEE5CnF9x1GPB/m6UAFce4TtQ6c+73XMdMeosRD2deIOJTquOWZkyEmYUGWsaG0/bqJC8skF5c95dyEOeQ3Y4rGoBnh4y16JzWe1zJRzl6+vWbHCEVRj2El9gPT7MKVJDhWJsgmg3vEGAE="}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":5674,"cache_read_input_tokens":24522,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":5674},"output_tokens":9,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZMQguv5Qp9Aj2LEoK25V","type":"assistant","uuid":"ca2ce28e-b05a-4f34-837a-e586a407ccb4","timestamp":"2026-03-24T06:11:16.722Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"ca2ce28e-b05a-4f34-837a-e586a407ccb4","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01LKFeWTdVYsah8SMydPXjeA","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01A9MRVkqzxxFLJVRZbvtQJd","name":"Grep","input":{"pattern":"RotateWALFilesAfterShutdown","path":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore","output_mode":"content","-n":true,"-A":20},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":5674,"cache_read_input_tokens":24522,"output_tokens":207,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":5674,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZMQguv5Qp9Aj2LEoK25V","type":"assistant","uuid":"98edabcc-2075-4fc4-944b-37aa42d308ad","timestamp":"2026-03-24T06:11:17.735Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"98edabcc-2075-4fc4-944b-37aa42d308ad","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Grep","command":"callback"},"parentToolUseID":"toolu_01A9MRVkqzxxFLJVRZbvtQJd","toolUseID":"toolu_01A9MRVkqzxxFLJVRZbvtQJd","timestamp":"2026-03-24T06:11:17.764Z","uuid":"c4854dda-0d40-4282-9b6b-bb90bb022e3f","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"98edabcc-2075-4fc4-944b-37aa42d308ad","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01A9MRVkqzxxFLJVRZbvtQJd","type":"tool_result","content":"pkg/metricstore/metricstore.go:300:\t\t\tRotateWALFilesAfterShutdown(hostDirs)\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-301-\t\t}\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-302-\t} else {\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-303-\t\tfiles, err = ms.ToCheckpoint(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-304-\t}\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-305-\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-306-\tif err != nil {\npkg/metricstore/metricstore.go-307-\t\tcclog.Errorf(\"[METRICSTORE]> Writing checkpoint failed: %s\\n\", err.Error())\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-308-\t}\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-309-\tcclog.Infof(\"[METRICSTORE]> Done! (%d files written)\\n\", files)\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-310-}\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-311-\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-312-// Retention starts a background goroutine that periodically frees old metric data.\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-313-//\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-314-// This worker runs at half the retention interval and calls Free() to remove buffers\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-315-// older than the configured retention time. It respects the NodeProvider to preserve\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-316-// data for nodes with active jobs.\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-317-//\npkg/metricstore/metricstore.go-318-/ Parameters:\npkg/metricstore/metricstore.go-319-/   - wg: WaitGroup to signal completion when context is cancelled\npkg/metricstore/metricstore.go-320-/   - ctx: Context for cancellation signal\n--\npkg/metricstore/walCheckpoint.go:353:func RotateWALFilesAfterShutdown(hostDirs []string) {\npkg/metricstore/walCheckpoint.go-354-\tfor _, dir := range hostDirs {\npkg/metricstore/walCheckpoint.go-355-\t\twalPath := path.Join(dir, \"current.wal\")\npkg/metricstore/walCheckpoint.go-356-\t\tif err := os.Remove(walPath); err != nil && !os.IsNotExist(err) {\npkg/metricstore/walCheckpoint.go-357-\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: remove %s: %v\", walPath, err)\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-358-\t\t}\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-359-\t}\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-360-}\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-361-\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-362-// writeWALRecordDirect encodes a WAL record directly into the bufio.Writer,\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-363-// avoiding heap allocations by using a stack-allocated scratch buffer for\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-364-// the fixed-size header/trailer and computing CRC inline.\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-365-func writeWALRecordDirect(w *bufio.Writer, msg *WALMessage) error {\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-366-\t// Compute payload size.\npkg/metricstore/walCheckpoint.go-367-\tpayloadSize := 8 + 2 + len(msg.MetricName) + 1 + 4\npkg/metricstore/walCheckpoint.go-368-\tfor _, s := range msg.Selector {\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-369-\t\tpayloadSize += 1 + len(s)\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-370-\t}\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-371-\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-372-\t// Write magic + payload length (8 bytes header).\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-373-\tvar hdr [8]byte"}]},"uuid":"edbdfcf3-1cd7-428f-adde-a3d9dc904ee4","timestamp":"2026-03-24T06:11:17.764Z","toolUseResult":{"mode":"content","numFiles":0,"filenames":[],"content":"pkg/metricstore/metricstore.go:300:\t\t\tRotateWALFilesAfterShutdown(hostDirs)\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-301-\t\t}\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-302-\t} else {\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-303-\t\tfiles, err = ms.ToCheckpoint(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-304-\t}\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-305-\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-306-\tif err != nil {\npkg/metricstore/metricstore.go-307-\t\tcclog.Errorf(\"[METRICSTORE]> Writing checkpoint failed: %s\\n\", err.Error())\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-308-\t}\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-309-\tcclog.Infof(\"[METRICSTORE]> Done! (%d files written)\\n\", files)\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-310-}\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-311-\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-312-// Retention starts a background goroutine that periodically frees old metric data.\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-313-//\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-314-// This worker runs at half the retention interval and calls Free() to remove buffers\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-315-// older than the configured retention time. It respects the NodeProvider to preserve\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-316-// data for nodes with active jobs.\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-317-//\npkg/metricstore/metricstore.go-318-/ Parameters:\npkg/metricstore/metricstore.go-319-/   - wg: WaitGroup to signal completion when context is cancelled\npkg/metricstore/metricstore.go-320-/   - ctx: Context for cancellation signal\n--\npkg/metricstore/walCheckpoint.go:353:func RotateWALFilesAfterShutdown(hostDirs []string) {\npkg/metricstore/walCheckpoint.go-354-\tfor _, dir := range hostDirs {\npkg/metricstore/walCheckpoint.go-355-\t\twalPath := path.Join(dir, \"current.wal\")\npkg/metricstore/walCheckpoint.go-356-\t\tif err := os.Remove(walPath); err != nil && !os.IsNotExist(err) {\npkg/metricstore/walCheckpoint.go-357-\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: remove %s: %v\", walPath, err)\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-358-\t\t}\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-359-\t}\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-360-}\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-361-\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-362-// writeWALRecordDirect encodes a WAL record directly into the bufio.Writer,\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-363-// avoiding heap allocations by using a stack-allocated scratch buffer for\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-364-// the fixed-size header/trailer and computing CRC inline.\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-365-func writeWALRecordDirect(w *bufio.Writer, msg *WALMessage) error {\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-366-\t// Compute payload size.\npkg/metricstore/walCheckpoint.go-367-\tpayloadSize := 8 + 2 + len(msg.MetricName) + 1 + 4\npkg/metricstore/walCheckpoint.go-368-\tfor _, s := range msg.Selector {\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-369-\t\tpayloadSize += 1 + len(s)\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-370-\t}\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-371-\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-372-\t// Write magic + payload length (8 bytes header).\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go-373-\tvar hdr [8]byte","numLines":43},"sourceToolAssistantUUID":"98edabcc-2075-4fc4-944b-37aa42d308ad","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"edbdfcf3-1cd7-428f-adde-a3d9dc904ee4","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01DccSQuCYfLo4F3GQb3qt8J","type":"message","role":"assistant","content":[{"type":"text","text":"Now I have a clear picture. Let me also check how the WAL shard channels interact with the shutdown — specifically, the order matters: channels are closed (line 281-283) before `ToCheckpointWAL` is called (line 298), and the `wg.Wait()` in main.go waits for the WAL staging goroutines to finish."}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":1866,"cache_read_input_tokens":30196,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":1866},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZMQhS3JkCALV7htwXXRB","type":"assistant","uuid":"54217c49-cb92-4d3c-98e9-e2cf36ff917a","timestamp":"2026-03-24T06:11:25.142Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"54217c49-cb92-4d3c-98e9-e2cf36ff917a","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01DccSQuCYfLo4F3GQb3qt8J","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_015pniRJfUy5pBdsgWUbvmg6","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go","offset":220,"limit":55},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":1866,"cache_read_input_tokens":30196,"output_tokens":198,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":1866,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZMQhS3JkCALV7htwXXRB","type":"assistant","uuid":"3416f98b-a753-4477-ad58-4c3c52a80c2e","timestamp":"2026-03-24T06:11:25.875Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"3416f98b-a753-4477-ad58-4c3c52a80c2e","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Read","command":"callback"},"parentToolUseID":"toolu_015pniRJfUy5pBdsgWUbvmg6","toolUseID":"toolu_015pniRJfUy5pBdsgWUbvmg6","timestamp":"2026-03-24T06:11:25.926Z","uuid":"091168b1-02d0-44fe-8a87-dd17bab02a26","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"3416f98b-a753-4477-ad58-4c3c52a80c2e","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_015pniRJfUy5pBdsgWUbvmg6","type":"tool_result","content":"   220→\t\t}\n   221→\n   222→\t\tmsInstance = &MemoryStore{\n   223→\t\t\troot: Level{\n   224→\t\t\t\tmetrics:  make([]*buffer, len(metrics)),\n   225→\t\t\t\tchildren: make(map[string]*Level),\n   226→\t\t\t},\n   227→\t\t\tMetrics: metrics,\n   228→\t\t}\n   229→\t})\n   230→}\n   231→\n   232→// GetMemoryStore returns the singleton MemoryStore instance.\n   233→//\n   234→// Returns the initialized MemoryStore singleton. Calls cclog.Fatal if InitMetrics() was not called first.\n   235→//\n   236→// This function is safe for concurrent use after initialization.\n   237→func GetMemoryStore() *MemoryStore {\n   238→\tif msInstance == nil {\n   239→\t\tcclog.Warnf(\"[METRICSTORE]> MemoryStore not initialized!\")\n   240→\t}\n   241→\n   242→\treturn msInstance\n   243→}\n   244→\n   245→func (ms *MemoryStore) GetMetricFrequency(metricName string) (int64, error) {\n   246→\tif metric, ok := ms.Metrics[metricName]; ok {\n   247→\t\treturn metric.Frequency, nil\n   248→\t}\n   249→\treturn 0, fmt.Errorf(\"[METRICSTORE]> metric %s not found\", metricName)\n   250→}\n   251→\n   252→// SetNodeProvider sets the NodeProvider implementation for the MemoryStore.\n   253→// This must be called during initialization to provide job state information\n   254→// for selective buffer retention during Free operations.\n   255→// If not set, the Free function will fall back to freeing all buffers.\n   256→func (ms *MemoryStore) SetNodeProvider(provider NodeProvider) {\n   257→\tms.nodeProvider = provider\n   258→}\n   259→\n   260→// Shutdown performs a graceful shutdown of the metric store.\n   261→//\n   262→// This function cancels all background goroutines started by Init() and writes\n   263→// a final checkpoint to disk before returning. It should be called when the\n   264→// application receives a termination signal.\n   265→//\n   266→// The function will:\n   267→//  1. Cancel the context to stop all background workers\n   268→//  2. Close the WAL messages channel if using WAL format\n   269→//  3. Write a final checkpoint to preserve in-memory data\n   270→//  4. Log any errors encountered during shutdown\n   271→//\n   272→// Note: This function blocks until the final checkpoint is written.\n   273→func Shutdown() {\n   274→\tshutdownFuncMu.Lock()"}]},"uuid":"8aa19712-e58f-4c3c-8e9b-a055f21b7ca8","timestamp":"2026-03-24T06:11:25.925Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go","content":"\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\tshutdownFuncMu.Lock()","numLines":55,"startLine":220,"totalLines":804}},"sourceToolAssistantUUID":"3416f98b-a753-4477-ad58-4c3c52a80c2e","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"8aa19712-e58f-4c3c-8e9b-a055f21b7ca8","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01P9VMxK6kuf7fMuDKFqUA76","type":"message","role":"assistant","content":[{"type":"thinking","thinking":"","signature":"ErgCCkYIDBgCKkBxC/PUzttP44WKlkxlC5//kWdwIzBk7MpiN5UqLzq4IeNjdtyYaUj0ZCVhAHkDdvfEap6DjqfPH5jJmoKC67ZHEgxWXKzLcb/PU8SE6kEaDJeaYMJNA1gj4wICdSIwDLLmPUimymaDwxPtEGL+7TVVf0QbcL2FZ4WU+wtY7R93man93biAx0AxVtr+N+PGKp8BbiczpPBah9zTZWVRtnF+0MCjqArPv9WK5mN3In1caAXp0XHTQ0x2qxG23X0MTUNNqwTE4cWvF4EFqs1ZeeD3s6Sv9SVdar4q5cZrelJ5OnfO+3P7ZhasDpFeezHI9XhzaG5zkTvJXv8HdFUVxfPL+xKuUpeHFV41fKHGqeiNy2eyxQyV5C9M7RLARt8QJb0yThKA7YJoO3WOEdMd++goGAE="}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":1094,"cache_read_input_tokens":32062,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":1094},"output_tokens":8,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZMQi2tYnTNJz1qy6o5eT","type":"assistant","uuid":"b2e83702-b968-4293-ba5f-94d801e10adb","timestamp":"2026-03-24T06:11:30.139Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"b2e83702-b968-4293-ba5f-94d801e10adb","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01P9VMxK6kuf7fMuDKFqUA76","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_017qoczFES8y8gNrdW2wj7Wc","name":"Grep","input":{"pattern":"shutdownFunc","path":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore","output_mode":"content","-n":true,"-C":3},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":1094,"cache_read_input_tokens":32062,"output_tokens":197,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":1094,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZMQi2tYnTNJz1qy6o5eT","type":"assistant","uuid":"48fa43f4-ec8e-44c2-9359-dd71b6ea5b98","timestamp":"2026-03-24T06:11:30.829Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"48fa43f4-ec8e-44c2-9359-dd71b6ea5b98","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Grep","command":"callback"},"parentToolUseID":"toolu_017qoczFES8y8gNrdW2wj7Wc","toolUseID":"toolu_017qoczFES8y8gNrdW2wj7Wc","timestamp":"2026-03-24T06:11:30.858Z","uuid":"5cb109c5-b5b8-43c1-a363-2d285a505a2c","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"48fa43f4-ec8e-44c2-9359-dd71b6ea5b98","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_017qoczFES8y8gNrdW2wj7Wc","type":"tool_result","content":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-48-var (\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-49-\tsingleton  sync.Once\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-50-\tmsInstance *MemoryStore\npkg/metricstore/metricstore.go:51:\t// shutdownFunc stores the context cancellation function created in Init\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-52-\t// and is called during Shutdown to cancel all background goroutines\npkg/metricstore/metricstore.go:53:\tshutdownFunc   context.CancelFunc\npkg/metricstore/metricstore.go:54:\tshutdownFuncMu sync.Mutex // Protects shutdownFunc from concurrent access\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-55-\t// Create a global instance\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-56-\tstate = &GlobalState{}\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-57-)\n--\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-179-\t// The caller is responsible for handling shutdown signals and calling\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-180-\t// the shutdown() function when appropriate.\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-181-\t// Store the shutdown function for later use by Shutdown()\npkg/metricstore/metricstore.go:182:\tshutdownFuncMu.Lock()\npkg/metricstore/metricstore.go:183:\tshutdownFunc = shutdown\npkg/metricstore/metricstore.go:184:\tshutdownFuncMu.Unlock()\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-185-\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-186-\tif Keys.Subscriptions != nil {\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-187-\t\twg.Go(func() {\n--\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-271-//\npkg/metricstore/metricstore.go-272-/ Note: This function blocks until the final checkpoint is written.\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-273-func Shutdown() {\npkg/metricstore/metricstore.go:274:\tshutdownFuncMu.Lock()\npkg/metricstore/metricstore.go:275:\tdefer shutdownFuncMu.Unlock()\npkg/metricstore/metricstore.go:276:\tif shutdownFunc != nil {\npkg/metricstore/metricstore.go:277:\t\tshutdownFunc()\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-278-\t}\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-279-\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-280-\tif Keys.Checkpoints.FileFormat == \"wal\" {"}]},"uuid":"dfcd2b6a-6091-43ce-b395-abc475c88e6d","timestamp":"2026-03-24T06:11:30.857Z","toolUseResult":{"mode":"content","numFiles":0,"filenames":[],"content":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-48-var (\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-49-\tsingleton  sync.Once\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-50-\tmsInstance *MemoryStore\npkg/metricstore/metricstore.go:51:\t// shutdownFunc stores the context cancellation function created in Init\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-52-\t// and is called during Shutdown to cancel all background goroutines\npkg/metricstore/metricstore.go:53:\tshutdownFunc   context.CancelFunc\npkg/metricstore/metricstore.go:54:\tshutdownFuncMu sync.Mutex // Protects shutdownFunc from concurrent access\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-55-\t// Create a global instance\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-56-\tstate = &GlobalState{}\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-57-)\n--\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-179-\t// The caller is responsible for handling shutdown signals and calling\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-180-\t// the shutdown() function when appropriate.\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-181-\t// Store the shutdown function for later use by Shutdown()\npkg/metricstore/metricstore.go:182:\tshutdownFuncMu.Lock()\npkg/metricstore/metricstore.go:183:\tshutdownFunc = shutdown\npkg/metricstore/metricstore.go:184:\tshutdownFuncMu.Unlock()\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-185-\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-186-\tif Keys.Subscriptions != nil {\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-187-\t\twg.Go(func() {\n--\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-271-//\npkg/metricstore/metricstore.go-272-/ Note: This function blocks until the final checkpoint is written.\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-273-func Shutdown() {\npkg/metricstore/metricstore.go:274:\tshutdownFuncMu.Lock()\npkg/metricstore/metricstore.go:275:\tdefer shutdownFuncMu.Unlock()\npkg/metricstore/metricstore.go:276:\tif shutdownFunc != nil {\npkg/metricstore/metricstore.go:277:\t\tshutdownFunc()\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-278-\t}\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-279-\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go-280-\tif Keys.Checkpoints.FileFormat == \"wal\" {","numLines":31},"sourceToolAssistantUUID":"48fa43f4-ec8e-44c2-9359-dd71b6ea5b98","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"dfcd2b6a-6091-43ce-b395-abc475c88e6d","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01FXkaoVoSdFiLn4xZjA8TN5","type":"message","role":"assistant","content":[{"type":"text","text":"Now I have the full picture. Here's the critical issue:\n\n**In `Shutdown()` (metricstore.go:273-310):**\n1. Line 277: `shutdownFunc()` — cancels the context\n2. Lines 281-283: closes all WAL shard channels\n3. Line 298: calls `ToCheckpointWAL()` — writes binary snapshots for ALL hosts\n\nBut step 1 triggers `ctx.Done()` in the WAL staging goroutines, which calls `drain()` (line 301 in walCheckpoint.go). The `drain()` processes remaining messages and then the goroutine returns. Meanwhile, step 3 then writes binary snapshots for every host — this is the slow part, and it happens **after** the WAL workers already drained.\n\nThe real bottleneck is `ToCheckpointWAL()` writing binary snapshots for every host with no timeout. But the question is whether this was always happening. Let me check the `wg` interaction — the WAL staging goroutines are on the same `wg` as the shutdown handler."}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":1211,"cache_read_input_tokens":33156,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":1211},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZMQiPkRPnn5Eh4TKhxdo","type":"assistant","uuid":"49388f7a-d115-459d-9ef5-fff7c92fcac0","timestamp":"2026-03-24T06:11:38.784Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"49388f7a-d115-459d-9ef5-fff7c92fcac0","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01FXkaoVoSdFiLn4xZjA8TN5","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01B68rSaA8EHCZHUq6Hp8xC3","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go","offset":140,"limit":50},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":1211,"cache_read_input_tokens":33156,"output_tokens":368,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":1211,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZMQiPkRPnn5Eh4TKhxdo","type":"assistant","uuid":"97b13dec-2f78-4095-9d05-a2728ab72151","timestamp":"2026-03-24T06:11:39.339Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"97b13dec-2f78-4095-9d05-a2728ab72151","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Read","command":"callback"},"parentToolUseID":"toolu_01B68rSaA8EHCZHUq6Hp8xC3","toolUseID":"toolu_01B68rSaA8EHCZHUq6Hp8xC3","timestamp":"2026-03-24T06:11:39.356Z","uuid":"76df43ed-3c15-4200-a882-5710e0ac54b7","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"97b13dec-2f78-4095-9d05-a2728ab72151","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01B68rSaA8EHCZHUq6Hp8xC3","type":"tool_result","content":"   140→\tcclog.Debugf(\"[METRICSTORE]> Using %d workers for checkpoint/archive operations\\n\", Keys.NumWorkers)\n   141→\n   142→\t// Pass the config.MetricStoreKeys\n   143→\tInitMetrics(metrics)\n   144→\n   145→\tms := GetMemoryStore()\n   146→\n   147→\td, err := time.ParseDuration(Keys.RetentionInMemory)\n   148→\tif err != nil {\n   149→\t\tcclog.Fatal(err)\n   150→\t}\n   151→\n   152→\trestoreFrom := startupTime.Add(-d)\n   153→\tcclog.Infof(\"[METRICSTORE]> Loading checkpoints newer than %s\\n\", restoreFrom.Format(time.RFC3339))\n   154→\tfiles, err := ms.FromCheckpointFiles(Keys.Checkpoints.RootDir, restoreFrom.Unix())\n   155→\tloadedData := ms.SizeInBytes() / 1024 / 1024 // In MB\n   156→\tif err != nil {\n   157→\t\tcclog.Fatalf(\"[METRICSTORE]> Loading checkpoints failed: %s\\n\", err.Error())\n   158→\t} else {\n   159→\t\tcclog.Infof(\"[METRICSTORE]> Checkpoints loaded (%d files, %d MB, that took %fs)\\n\", files, loadedData, time.Since(startupTime).Seconds())\n   160→\t}\n   161→\n   162→\t// Try to use less memory by forcing a GC run here and then\n   163→\t// lowering the target percentage. The default of 100 means\n   164→\t// that only once the ratio of new allocations execeds the\n   165→\t// previously active heap, a GC is triggered.\n   166→\t// Forcing a GC here will set the \"previously active heap\"\n   167→\t// to a minumum.\n   168→\t// runtime.GC()\n   169→\n   170→\tctx, shutdown := context.WithCancel(context.Background())\n   171→\n   172→\tRetention(wg, ctx)\n   173→\tCheckpointing(wg, ctx)\n   174→\tCleanUp(wg, ctx)\n   175→\tWALStaging(wg, ctx)\n   176→\tMemoryUsageTracker(wg, ctx)\n   177→\n   178→\t// Note: Signal handling has been removed from this function.\n   179→\t// The caller is responsible for handling shutdown signals and calling\n   180→\t// the shutdown() function when appropriate.\n   181→\t// Store the shutdown function for later use by Shutdown()\n   182→\tshutdownFuncMu.Lock()\n   183→\tshutdownFunc = shutdown\n   184→\tshutdownFuncMu.Unlock()\n   185→\n   186→\tif Keys.Subscriptions != nil {\n   187→\t\twg.Go(func() {\n   188→\t\t\tif err := ReceiveNats(ms, Keys.NumWorkers, ctx); err != nil {\n   189→\t\t\t\tcclog.Fatal(err)"}]},"uuid":"f45ff15d-87c6-4ad0-9653-1c0957c7d13f","timestamp":"2026-03-24T06:11:39.356Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go","content":"\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)","numLines":50,"startLine":140,"totalLines":804}},"sourceToolAssistantUUID":"97b13dec-2f78-4095-9d05-a2728ab72151","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"f45ff15d-87c6-4ad0-9653-1c0957c7d13f","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01Eui9SQzwKWPrGWGCejfBnX","type":"message","role":"assistant","content":[{"type":"thinking","thinking":"","signature":"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"}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":1149,"cache_read_input_tokens":34367,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":1149},"output_tokens":8,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZMQj2JcH2pKKkC7MS1Mi","type":"assistant","uuid":"8aa2e4af-bffa-4aa8-9ff2-894b2c0d692c","timestamp":"2026-03-24T06:12:27.199Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"8aa2e4af-bffa-4aa8-9ff2-894b2c0d692c","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01Eui9SQzwKWPrGWGCejfBnX","type":"message","role":"assistant","content":[{"type":"text","text":"Now I have a clear understanding. Let me design the plan."}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":1149,"cache_read_input_tokens":34367,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":1149},"output_tokens":8,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZMQj2JcH2pKKkC7MS1Mi","type":"assistant","uuid":"cc9121ea-a2fd-4b87-af43-5b078e7c5d82","timestamp":"2026-03-24T06:12:28.031Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"cc9121ea-a2fd-4b87-af43-5b078e7c5d82","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01Eui9SQzwKWPrGWGCejfBnX","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","name":"Agent","input":{"subagent_type":"Plan","description":"Design shutdown optimization plan","prompt":"Design an implementation plan to reduce the shutdown time of this Go backend from ~40s to ~10s.\n\n## Current Shutdown Flow (SEQUENTIAL, in server.go:418-444)\n\n```go\nfunc (s *Server) Shutdown(ctx context.Context) {\n    shutdownCtx, cancel := context.WithTimeout(ctx, 30*time.Second)  // 30s timeout\n    defer cancel()\n    nc := nats.GetClient()\n    if nc != nil { nc.Close() }\n    \n    // Step 1: HTTP server graceful shutdown — up to 30s timeout\n    s.server.Shutdown(shutdownCtx)\n    \n    // Step 2: metricstore.Shutdown() — NO TIMEOUT, writes binary snapshots for ALL hosts\n    metricstore.Shutdown()\n    \n    // Step 3: archiver.Shutdown(10s) — 10s timeout\n    archiver.Shutdown(10 * time.Second)\n}\n```\n\nThen in main.go:417, `taskmanager.Shutdown()` runs after.\n\n## Root Cause Analysis\n\nThe shutdown is sequential with generous/missing timeouts:\n- HTTP server gets up to 30s (server.go:420)\n- metricstore.Shutdown() has NO timeout — calls ToCheckpointWAL() which writes binary snapshot files for every host using a worker pool (walCheckpoint.go:627-702). This can take 20+ seconds for large installations.\n- archiver gets 10s (server.go:441)\n- Worst case sequential: 30 + unbounded + 10 = 40s+\n\nThe key issue is NOT the WAL drain (that's fast) — it's the final binary checkpoint write in ToCheckpointWAL().\n\n## metricstore.Shutdown() detail (metricstore.go:273-310)\n1. Cancels context (stops background goroutines)\n2. Closes WAL shard channels (triggers WAL staging goroutine drain)\n3. Calls ToCheckpointWAL() — THIS IS THE BOTTLENECK: writes .bin files for every host\n\n## Constraints\n- The final checkpoint MUST still be written for data integrity — we can't skip it\n- The WAL format means we have both WAL files AND periodic binary snapshots\n- Performance is critical (CLAUDE.md: \"prioritize maximum throughput and minimal latency\")\n- The archiver shutdown already has proper timeout handling with graceful cancellation\n\n## What to Optimize\n\n1. **Reduce HTTP server shutdown timeout** — 30s is excessive; 5s is plenty for graceful drain\n2. **Parallelize independent shutdown steps** — metricstore and archiver can shut down concurrently\n3. **Add overall shutdown deadline** — ensure total shutdown time is bounded\n4. **Keep ToCheckpointWAL as-is** — it's already parallelized with NumWorkers, and we need it for data integrity. The savings come from not waiting 30s for HTTP first.\n\nPlease provide a detailed implementation plan with specific code changes needed.\n"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":1149,"cache_read_input_tokens":34367,"output_tokens":3097,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":1149,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZMQj2JcH2pKKkC7MS1Mi","type":"assistant","uuid":"f28e4553-a2a5-412e-88c5-0492aa743685","timestamp":"2026-03-24T06:12:41.771Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"f28e4553-a2a5-412e-88c5-0492aa743685","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PreToolUse","hookName":"PreToolUse:Agent","command":"entire hooks claude-code pre-task"},"toolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","parentToolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","uuid":"af6c043b-be86-44a0-a42c-668e654a0aef","timestamp":"2026-03-24T06:12:41.775Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"af6c043b-be86-44a0-a42c-668e654a0aef","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"type":"text","text":"Design an implementation plan to reduce the shutdown time of this Go backend from ~40s to ~10s.\n\n## Current Shutdown Flow (SEQUENTIAL, in server.go:418-444)\n\n```go\nfunc (s *Server) Shutdown(ctx context.Context) {\n    shutdownCtx, cancel := context.WithTimeout(ctx, 30*time.Second)  // 30s timeout\n    defer cancel()\n    nc := nats.GetClient()\n    if nc != nil { nc.Close() }\n    \n    // Step 1: HTTP server graceful shutdown — up to 30s timeout\n    s.server.Shutdown(shutdownCtx)\n    \n    // Step 2: metricstore.Shutdown() — NO TIMEOUT, writes binary snapshots for ALL hosts\n    metricstore.Shutdown()\n    \n    // Step 3: archiver.Shutdown(10s) — 10s timeout\n    archiver.Shutdown(10 * time.Second)\n}\n```\n\nThen in main.go:417, `taskmanager.Shutdown()` runs after.\n\n## Root Cause Analysis\n\nThe shutdown is sequential with generous/missing timeouts:\n- HTTP server gets up to 30s (server.go:420)\n- metricstore.Shutdown() has NO timeout — calls ToCheckpointWAL() which writes binary snapshot files for every host using a worker pool (walCheckpoint.go:627-702). This can take 20+ seconds for large installations.\n- archiver gets 10s (server.go:441)\n- Worst case sequential: 30 + unbounded + 10 = 40s+\n\nThe key issue is NOT the WAL drain (that's fast) — it's the final binary checkpoint write in ToCheckpointWAL().\n\n## metricstore.Shutdown() detail (metricstore.go:273-310)\n1. Cancels context (stops background goroutines)\n2. Closes WAL shard channels (triggers WAL staging goroutine drain)\n3. Calls ToCheckpointWAL() — THIS IS THE BOTTLENECK: writes .bin files for every host\n\n## Constraints\n- The final checkpoint MUST still be written for data integrity — we can't skip it\n- The WAL format means we have both WAL files AND periodic binary snapshots\n- Performance is critical (CLAUDE.md: \"prioritize maximum throughput and minimal latency\")\n- The archiver shutdown already has proper timeout handling with graceful cancellation\n\n## What to Optimize\n\n1. **Reduce HTTP server shutdown timeout** — 30s is excessive; 5s is plenty for graceful drain\n2. **Parallelize independent shutdown steps** — metricstore and archiver can shut down concurrently\n3. **Add overall shutdown deadline** — ensure total shutdown time is bounded\n4. **Keep ToCheckpointWAL as-is** — it's already parallelized with NumWorkers, and we need it for data integrity. The savings come from not waiting 30s for HTTP first.\n\nPlease provide a detailed implementation plan with specific code changes needed.\n"}]},"uuid":"d21878e5-61c8-4226-8b78-b92c0f57394a","timestamp":"2026-03-24T06:12:42.271Z"},"type":"agent_progress","prompt":"Design an implementation plan to reduce the shutdown time of this Go backend from ~40s to ~10s.\n\n## Current Shutdown Flow (SEQUENTIAL, in server.go:418-444)\n\n```go\nfunc (s *Server) Shutdown(ctx context.Context) {\n    shutdownCtx, cancel := context.WithTimeout(ctx, 30*time.Second)  // 30s timeout\n    defer cancel()\n    nc := nats.GetClient()\n    if nc != nil { nc.Close() }\n    \n    // Step 1: HTTP server graceful shutdown — up to 30s timeout\n    s.server.Shutdown(shutdownCtx)\n    \n    // Step 2: metricstore.Shutdown() — NO TIMEOUT, writes binary snapshots for ALL hosts\n    metricstore.Shutdown()\n    \n    // Step 3: archiver.Shutdown(10s) — 10s timeout\n    archiver.Shutdown(10 * time.Second)\n}\n```\n\nThen in main.go:417, `taskmanager.Shutdown()` runs after.\n\n## Root Cause Analysis\n\nThe shutdown is sequential with generous/missing timeouts:\n- HTTP server gets up to 30s (server.go:420)\n- metricstore.Shutdown() has NO timeout — calls ToCheckpointWAL() which writes binary snapshot files for every host using a worker pool (walCheckpoint.go:627-702). This can take 20+ seconds for large installations.\n- archiver gets 10s (server.go:441)\n- Worst case sequential: 30 + unbounded + 10 = 40s+\n\nThe key issue is NOT the WAL drain (that's fast) — it's the final binary checkpoint write in ToCheckpointWAL().\n\n## metricstore.Shutdown() detail (metricstore.go:273-310)\n1. Cancels context (stops background goroutines)\n2. Closes WAL shard channels (triggers WAL staging goroutine drain)\n3. Calls ToCheckpointWAL() — THIS IS THE BOTTLENECK: writes .bin files for every host\n\n## Constraints\n- The final checkpoint MUST still be written for data integrity — we can't skip it\n- The WAL format means we have both WAL files AND periodic binary snapshots\n- Performance is critical (CLAUDE.md: \"prioritize maximum throughput and minimal latency\")\n- The archiver shutdown already has proper timeout handling with graceful cancellation\n\n## What to Optimize\n\n1. **Reduce HTTP server shutdown timeout** — 30s is excessive; 5s is plenty for graceful drain\n2. **Parallelize independent shutdown steps** — metricstore and archiver can shut down concurrently\n3. **Add overall shutdown deadline** — ensure total shutdown time is bounded\n4. **Keep ToCheckpointWAL as-is** — it's already parallelized with NumWorkers, and we need it for data integrity. The savings come from not waiting 30s for HTTP first.\n\nPlease provide a detailed implementation plan with specific code changes needed.\n","agentId":"aaa23999739ba99a2"},"toolUseID":"agent_msg_01Eui9SQzwKWPrGWGCejfBnX","parentToolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","uuid":"f408de33-15e7-465f-8ac8-654b6fd32a46","timestamp":"2026-03-24T06:12:42.272Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"f408de33-15e7-465f-8ac8-654b6fd32a46","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:12:46.789Z","message":{"model":"claude-opus-4-6","id":"msg_01PsKeZTP3mS71qVsDwuuE8R","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01UoBugLwig6wydSj3rcR1Dn","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go","offset":400,"limit":60},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":11967,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":11967,"ephemeral_1h_input_tokens":0},"output_tokens":2,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQofEETsuWNv3hazekQ","uuid":"258f657b-8d26-408f-8d8c-ab02472c4507"},"type":"agent_progress","prompt":"","agentId":"aaa23999739ba99a2"},"toolUseID":"agent_msg_01Eui9SQzwKWPrGWGCejfBnX","parentToolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","uuid":"24860438-92da-45e0-a609-01210699d767","timestamp":"2026-03-24T06:12:46.790Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"24860438-92da-45e0-a609-01210699d767","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01UoBugLwig6wydSj3rcR1Dn","type":"tool_result","content":"   400→\t}\n   401→\n   402→\t// Handle context cancellation for graceful shutdown\n   403→\tgo func() {\n   404→\t\t<-ctx.Done()\n   405→\t\tshutdownCtx, cancel := context.WithTimeout(context.Background(), 30*time.Second)\n   406→\t\tdefer cancel()\n   407→\t\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n   408→\t\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n   409→\t\t}\n   410→\t}()\n   411→\n   412→\tif err = s.server.Serve(listener); err != nil && err != http.ErrServerClosed {\n   413→\t\treturn fmt.Errorf(\"server failed: %w\", err)\n   414→\t}\n   415→\treturn nil\n   416→}\n   417→\n   418→func (s *Server) Shutdown(ctx context.Context) {\n   419→\t// Create a shutdown context with timeout\n   420→\tshutdownCtx, cancel := context.WithTimeout(ctx, 30*time.Second)\n   421→\tdefer cancel()\n   422→\n   423→\tnc := nats.GetClient()\n   424→\tif nc != nil {\n   425→\t\tnc.Close()\n   426→\t}\n   427→\n   428→\t// First shut down the server gracefully (waiting for all ongoing requests)\n   429→\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n   430→\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n   431→\t}\n   432→\n   433→\t// Archive all the metric store data\n   434→\tms := metricstore.GetMemoryStore()\n   435→\n   436→\tif ms != nil {\n   437→\t\tmetricstore.Shutdown()\n   438→\t}\n   439→\n   440→\t// Shutdown archiver with 10 second timeout for fast shutdown\n   441→\tif err := archiver.Shutdown(10 * time.Second); err != nil {\n   442→\t\tcclog.Warnf(\"Archiver shutdown: %v\", err)\n   443→\t}\n   444→}\n   445→"}]},"uuid":"0232110b-a6b5-4a81-a742-cd5914c60aba","timestamp":"2026-03-24T06:12:46.817Z"},"type":"agent_progress","prompt":"","agentId":"aaa23999739ba99a2"},"toolUseID":"agent_msg_01Eui9SQzwKWPrGWGCejfBnX","parentToolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","uuid":"19bc8650-66bf-4684-abda-5d65b4dddd5e","timestamp":"2026-03-24T06:12:47.211Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"19bc8650-66bf-4684-abda-5d65b4dddd5e","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:12:47.678Z","message":{"model":"claude-opus-4-6","id":"msg_01PsKeZTP3mS71qVsDwuuE8R","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01QB96zYkrwc5zvyufeY9SJq","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go","offset":400,"limit":40},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":11967,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":11967,"ephemeral_1h_input_tokens":0},"output_tokens":2,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQofEETsuWNv3hazekQ","uuid":"89fd07f5-640a-4ff8-b886-5fac68e75ae2"},"type":"agent_progress","prompt":"","agentId":"aaa23999739ba99a2"},"toolUseID":"agent_msg_01Eui9SQzwKWPrGWGCejfBnX","parentToolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","uuid":"700ce943-3dc7-48ee-afae-01ca8b5d0b4f","timestamp":"2026-03-24T06:12:47.678Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"700ce943-3dc7-48ee-afae-01ca8b5d0b4f","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01QB96zYkrwc5zvyufeY9SJq","type":"tool_result","content":"   400→\t})\n   401→\n   402→\t// Handle shutdown signals\n   403→\twg.Add(1)\n   404→\tsigs := make(chan os.Signal, 1)\n   405→\tsignal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)\n   406→\tgo func() {\n   407→\t\tdefer wg.Done()\n   408→\t\tselect {\n   409→\t\tcase <-sigs:\n   410→\t\t\tcclog.Info(\"Shutdown signal received\")\n   411→\t\tcase <-ctx.Done():\n   412→\t\t}\n   413→\n   414→\t\truntime.SystemdNotify(false, \"Shutting down ...\")\n   415→\t\tsrv.Shutdown(ctx)\n   416→\t\tutil.FsWatcherShutdown()\n   417→\t\ttaskmanager.Shutdown()\n   418→\t}()\n   419→\n   420→\t// Set GC percent if not configured\n   421→\tif os.Getenv(envGOGC) == \"\" {\n   422→\t\t// trigger GC when heap grows 15% above the previous live set\n   423→\t\tdebug.SetGCPercent(15)\n   424→\t}\n   425→\truntime.SystemdNotify(true, \"running\")\n   426→\n   427→\twaitDone := make(chan struct{})\n   428→\tgo func() {\n   429→\t\twg.Wait()\n   430→\t\tclose(waitDone)\n   431→\t}()\n   432→\n   433→\tgo func() {\n   434→\t\t<-waitDone\n   435→\t\tclose(errChan)\n   436→\t}()\n   437→\n   438→\t// Wait for either:\n   439→\t// 1. An error from server startup"}]},"uuid":"2230a909-d63c-48cc-b269-195caeccfa8d","timestamp":"2026-03-24T06:12:47.686Z"},"type":"agent_progress","prompt":"","agentId":"aaa23999739ba99a2"},"toolUseID":"agent_msg_01Eui9SQzwKWPrGWGCejfBnX","parentToolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","uuid":"263f6144-b19a-466c-b783-0cdd24aa3e2d","timestamp":"2026-03-24T06:12:48.122Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"263f6144-b19a-466c-b783-0cdd24aa3e2d","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:12:48.506Z","message":{"model":"claude-opus-4-6","id":"msg_01PsKeZTP3mS71qVsDwuuE8R","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_015ci72NE8WCKbMEaCxYrvnr","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go","offset":260,"limit":60},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":11967,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":11967,"ephemeral_1h_input_tokens":0},"output_tokens":2,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQofEETsuWNv3hazekQ","uuid":"01162b6d-7f37-492c-a441-585cc338fd78"},"type":"agent_progress","prompt":"","agentId":"aaa23999739ba99a2"},"toolUseID":"agent_msg_01Eui9SQzwKWPrGWGCejfBnX","parentToolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","uuid":"bdbd4dfd-d367-4860-b163-160f00ab4ce8","timestamp":"2026-03-24T06:12:48.506Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"bdbd4dfd-d367-4860-b163-160f00ab4ce8","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_015ci72NE8WCKbMEaCxYrvnr","type":"tool_result","content":"   260→// Shutdown performs a graceful shutdown of the metric store.\n   261→//\n   262→// This function cancels all background goroutines started by Init() and writes\n   263→// a final checkpoint to disk before returning. It should be called when the\n   264→// application receives a termination signal.\n   265→//\n   266→// The function will:\n   267→//  1. Cancel the context to stop all background workers\n   268→//  2. Close the WAL messages channel if using WAL format\n   269→//  3. Write a final checkpoint to preserve in-memory data\n   270→//  4. Log any errors encountered during shutdown\n   271→//\n   272→// Note: This function blocks until the final checkpoint is written.\n   273→func Shutdown() {\n   274→\tshutdownFuncMu.Lock()\n   275→\tdefer shutdownFuncMu.Unlock()\n   276→\tif shutdownFunc != nil {\n   277→\t\tshutdownFunc()\n   278→\t}\n   279→\n   280→\tif Keys.Checkpoints.FileFormat == \"wal\" {\n   281→\t\tfor _, ch := range walShardChs {\n   282→\t\t\tclose(ch)\n   283→\t\t}\n   284→\t}\n   285→\n   286→\tcclog.Infof(\"[METRICSTORE]> Writing to '%s'...\\n\", Keys.Checkpoints.RootDir)\n   287→\tvar files int\n   288→\tvar err error\n   289→\n   290→\tms := GetMemoryStore()\n   291→\n   292→\tlastCheckpointMu.Lock()\n   293→\tfrom := lastCheckpoint\n   294→\tlastCheckpointMu.Unlock()\n   295→\n   296→\tif Keys.Checkpoints.FileFormat == \"wal\" {\n   297→\t\tvar hostDirs []string\n   298→\t\tfiles, hostDirs, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n   299→\t\tif err == nil {\n   300→\t\t\tRotateWALFilesAfterShutdown(hostDirs)\n   301→\t\t}\n   302→\t} else {\n   303→\t\tfiles, err = ms.ToCheckpoint(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n   304→\t}\n   305→\n   306→\tif err != nil {\n   307→\t\tcclog.Errorf(\"[METRICSTORE]> Writing checkpoint failed: %s\\n\", err.Error())\n   308→\t}\n   309→\tcclog.Infof(\"[METRICSTORE]> Done! (%d files written)\\n\", files)\n   310→}\n   311→\n   312→// Retention starts a background goroutine that periodically frees old metric data.\n   313→//\n   314→// This worker runs at half the retention interval and calls Free() to remove buffers\n   315→// older than the configured retention time. It respects the NodeProvider to preserve\n   316→// data for nodes with active jobs.\n   317→//\n   318→// Parameters:\n   319→//   - wg: WaitGroup to signal completion when context is cancelled"}]},"uuid":"21506df9-17b1-4bff-b487-90a7ea238ed0","timestamp":"2026-03-24T06:12:48.511Z"},"type":"agent_progress","prompt":"","agentId":"aaa23999739ba99a2"},"toolUseID":"agent_msg_01Eui9SQzwKWPrGWGCejfBnX","parentToolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","uuid":"187bdbc3-b1dd-4c6b-be49-17b4c85e7f76","timestamp":"2026-03-24T06:12:48.534Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"187bdbc3-b1dd-4c6b-be49-17b4c85e7f76","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:12:52.676Z","message":{"model":"claude-opus-4-6","id":"msg_01RHziGoW6gUaL8mK1MngaXe","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01Xpc4mZewyiDSaSkHbhu8cN","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go","offset":620,"limit":90},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":2573,"cache_read_input_tokens":11967,"cache_creation":{"ephemeral_5m_input_tokens":2573,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQp7z47uoX9EpKvgVQ1","uuid":"7845dd96-9320-4eb0-988e-9d4676958564"},"type":"agent_progress","prompt":"","agentId":"aaa23999739ba99a2"},"toolUseID":"agent_msg_01Eui9SQzwKWPrGWGCejfBnX","parentToolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","uuid":"9630e71e-32ee-4ec1-889e-8870eb460cfd","timestamp":"2026-03-24T06:12:52.676Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"9630e71e-32ee-4ec1-889e-8870eb460cfd","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01Xpc4mZewyiDSaSkHbhu8cN","type":"tool_result","content":"   620→\t}\n   621→\treturn result.String()\n   622→}\n   623→\n   624→// ToCheckpointWAL writes binary snapshot files for all hosts in parallel.\n   625→// Returns the number of files written, the list of host directories that were\n   626→// successfully checkpointed (for WAL rotation), and any errors.\n   627→func (m *MemoryStore) ToCheckpointWAL(dir string, from, to int64) (int, []string, error) {\n   628→\t// Collect all cluster/host pairs.\n   629→\tm.root.lock.RLock()\n   630→\ttotalHosts := 0\n   631→\tfor _, l1 := range m.root.children {\n   632→\t\tl1.lock.RLock()\n   633→\t\ttotalHosts += len(l1.children)\n   634→\t\tl1.lock.RUnlock()\n   635→\t}\n   636→\tm.root.lock.RUnlock()\n   637→\n   638→\tlevels := make([]*Level, 0, totalHosts)\n   639→\tselectors := make([][]string, 0, totalHosts)\n   640→\n   641→\tm.root.lock.RLock()\n   642→\tfor sel1, l1 := range m.root.children {\n   643→\t\tl1.lock.RLock()\n   644→\t\tfor sel2, l2 := range l1.children {\n   645→\t\t\tlevels = append(levels, l2)\n   646→\t\t\tselectors = append(selectors, []string{sel1, sel2})\n   647→\t\t}\n   648→\t\tl1.lock.RUnlock()\n   649→\t}\n   650→\tm.root.lock.RUnlock()\n   651→\n   652→\ttype workItem struct {\n   653→\t\tlevel    *Level\n   654→\t\thostDir  string\n   655→\t\tselector []string\n   656→\t}\n   657→\n   658→\tn, errs := int32(0), int32(0)\n   659→\tvar successDirs []string\n   660→\tvar successMu sync.Mutex\n   661→\n   662→\tvar wg sync.WaitGroup\n   663→\twg.Add(Keys.NumWorkers)\n   664→\twork := make(chan workItem, Keys.NumWorkers*2)\n   665→\n   666→\tfor range Keys.NumWorkers {\n   667→\t\tgo func() {\n   668→\t\t\tdefer wg.Done()\n   669→\t\t\tfor wi := range work {\n   670→\t\t\t\terr := wi.level.toCheckpointBinary(wi.hostDir, from, to, m)\n   671→\t\t\t\tif err != nil {\n   672→\t\t\t\t\tif err == ErrNoNewArchiveData {\n   673→\t\t\t\t\t\tcontinue\n   674→\t\t\t\t\t}\n   675→\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> binary checkpoint error for %s: %v\", wi.hostDir, err)\n   676→\t\t\t\t\tatomic.AddInt32(&errs, 1)\n   677→\t\t\t\t} else {\n   678→\t\t\t\t\tatomic.AddInt32(&n, 1)\n   679→\t\t\t\t\tsuccessMu.Lock()\n   680→\t\t\t\t\tsuccessDirs = append(successDirs, wi.hostDir)\n   681→\t\t\t\t\tsuccessMu.Unlock()\n   682→\t\t\t\t}\n   683→\t\t\t}\n   684→\t\t}()\n   685→\t}\n   686→\n   687→\tfor i := range levels {\n   688→\t\thostDir := path.Join(dir, path.Join(selectors[i]...))\n   689→\t\twork <- workItem{\n   690→\t\t\tlevel:    levels[i],\n   691→\t\t\thostDir:  hostDir,\n   692→\t\t\tselector: selectors[i],\n   693→\t\t}\n   694→\t}\n   695→\tclose(work)\n   696→\twg.Wait()\n   697→\n   698→\tif errs > 0 {\n   699→\t\treturn int(n), successDirs, fmt.Errorf(\"[METRICSTORE]> %d errors during binary checkpoint (%d successes)\", errs, n)\n   700→\t}\n   701→\treturn int(n), successDirs, nil\n   702→}\n   703→\n   704→// toCheckpointBinary writes a binary snapshot file for a single host-level node.\n   705→// Uses atomic rename (write to .tmp then rename) to avoid partial reads on crash.\n   706→func (l *Level) toCheckpointBinary(dir string, from, to int64, m *MemoryStore) error {\n   707→\tcf, err := l.toCheckpointFile(from, to, m)\n   708→\tif err != nil {\n   709→\t\treturn err"}]},"uuid":"a01fcc03-ffb7-4607-8282-321c36d04ada","timestamp":"2026-03-24T06:12:52.691Z"},"type":"agent_progress","prompt":"","agentId":"aaa23999739ba99a2"},"toolUseID":"agent_msg_01Eui9SQzwKWPrGWGCejfBnX","parentToolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","uuid":"d27f7167-d5cb-403d-92a4-71631302668c","timestamp":"2026-03-24T06:12:53.142Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"d27f7167-d5cb-403d-92a4-71631302668c","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:12:53.625Z","message":{"model":"claude-opus-4-6","id":"msg_01RHziGoW6gUaL8mK1MngaXe","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_019nvQKrxciYYwwGmwkKAXKk","name":"Grep","input":{"pattern":"func Shutdown","path":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver","output_mode":"content","-A":20},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":2573,"cache_read_input_tokens":11967,"cache_creation":{"ephemeral_5m_input_tokens":2573,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQp7z47uoX9EpKvgVQ1","uuid":"cc3e3ed2-64b2-4b91-8c89-c0bd78efce0f"},"type":"agent_progress","prompt":"","agentId":"aaa23999739ba99a2"},"toolUseID":"agent_msg_01Eui9SQzwKWPrGWGCejfBnX","parentToolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","uuid":"522ff16d-ab53-4996-bf93-5806bbd9ec5c","timestamp":"2026-03-24T06:12:53.626Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"522ff16d-ab53-4996-bf93-5806bbd9ec5c","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_019nvQKrxciYYwwGmwkKAXKk","type":"tool_result","content":"internal/archiver/archiveWorker.go:222:func Shutdown(timeout time.Duration) error {\n/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go-223-\tcclog.Info(\"Initiating archiver shutdown...\")\n/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go-224-\n/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go-225-\t// Close channel to signal no more jobs will be accepted\n/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go-226-\tclose(archiveChannel)\n/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go-227-\n/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go-228-\t// Create a channel to signal when all jobs are done\ninternal/archiver/archiveWorker.go-229-\tdone := make(chan struct{})\n/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go-230-\tgo func() {\n/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go-231-\t\tarchivePending.Wait()\n/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go-232-\t\tclose(done)\n/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go-233-\t}()\n/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go-234-\n/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go-235-\t// Wait for jobs to complete or timeout\n/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go-236-\tselect {\ninternal/archiver/archiveWorker.go-237-\tcase <-done:\n/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go-238-\t\tcclog.Info(\"All archive jobs completed successfully\")\n/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go-239-\t\t// Wait for worker to exit\n/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go-240-\t\t<-workerDone\n/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go-241-\t\treturn nil\ninternal/archiver/archiveWorker.go-242-\tcase <-time.After(timeout):"}]},"uuid":"891b136c-f610-4297-9f89-cf829c73594a","timestamp":"2026-03-24T06:12:53.647Z"},"type":"agent_progress","prompt":"","agentId":"aaa23999739ba99a2"},"toolUseID":"agent_msg_01Eui9SQzwKWPrGWGCejfBnX","parentToolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","uuid":"31689050-815e-4289-abdf-a9dcf02ba833","timestamp":"2026-03-24T06:12:54.129Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"31689050-815e-4289-abdf-a9dcf02ba833","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:12:54.459Z","message":{"model":"claude-opus-4-6","id":"msg_01RHziGoW6gUaL8mK1MngaXe","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01VYokaWKdz3yWnv6TiMWqvb","name":"Grep","input":{"pattern":"func Shutdown","path":"/Users/jan/prg/ClusterCockpit/cc-backend/internal/taskmanager","output_mode":"content","-A":15},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":2573,"cache_read_input_tokens":11967,"cache_creation":{"ephemeral_5m_input_tokens":2573,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQp7z47uoX9EpKvgVQ1","uuid":"663f622b-f33b-4ed9-8e92-523dd5dcf3f0"},"type":"agent_progress","prompt":"","agentId":"aaa23999739ba99a2"},"toolUseID":"agent_msg_01Eui9SQzwKWPrGWGCejfBnX","parentToolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","uuid":"45d1f81d-ffc7-4ffa-9f7c-1a6adf355711","timestamp":"2026-03-24T06:12:54.459Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"45d1f81d-ffc7-4ffa-9f7c-1a6adf355711","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01VYokaWKdz3yWnv6TiMWqvb","type":"tool_result","content":"internal/taskmanager/taskManager.go:165:func Shutdown() {\n/Users/jan/prg/ClusterCockpit/cc-backend/internal/taskmanager/taskManager.go-166-\tif s != nil {\n/Users/jan/prg/ClusterCockpit/cc-backend/internal/taskmanager/taskManager.go-167-\t\ts.Shutdown()\n/Users/jan/prg/ClusterCockpit/cc-backend/internal/taskmanager/taskManager.go-168-\t}\n/Users/jan/prg/ClusterCockpit/cc-backend/internal/taskmanager/taskManager.go-169-}"}]},"uuid":"3bdaa617-2370-4eec-8ad9-473aa7987c8e","timestamp":"2026-03-24T06:12:54.483Z"},"type":"agent_progress","prompt":"","agentId":"aaa23999739ba99a2"},"toolUseID":"agent_msg_01Eui9SQzwKWPrGWGCejfBnX","parentToolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","uuid":"32bc1092-384c-4d29-bd16-4895bf8c28ec","timestamp":"2026-03-24T06:12:54.484Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"32bc1092-384c-4d29-bd16-4895bf8c28ec","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:13:00.147Z","message":{"model":"claude-opus-4-6","id":"msg_0133uc4dTKmU4J5Z81S3Bmfp","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_014K53L3PPJxq6URMuFRAafN","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go","offset":380,"limit":70},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":2584,"cache_read_input_tokens":14540,"cache_creation":{"ephemeral_5m_input_tokens":2584,"ephemeral_1h_input_tokens":0},"output_tokens":6,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQpZQmDg22j1UmD1AUC","uuid":"d94a4031-3575-471a-b443-bc93c1354b2f"},"type":"agent_progress","prompt":"","agentId":"aaa23999739ba99a2"},"toolUseID":"agent_msg_01Eui9SQzwKWPrGWGCejfBnX","parentToolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","uuid":"158319f0-d2ab-459b-a35f-4f61408748d3","timestamp":"2026-03-24T06:13:00.147Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"158319f0-d2ab-459b-a35f-4f61408748d3","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_014K53L3PPJxq6URMuFRAafN","type":"tool_result","content":"   380→\t\t}\n   381→\t\tlistener = tls.NewListener(listener, &tls.Config{\n   382→\t\t\tCertificates: []tls.Certificate{cert},\n   383→\t\t\tCipherSuites: []uint16{\n   384→\t\t\t\ttls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,\n   385→\t\t\t\ttls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,\n   386→\t\t\t},\n   387→\t\t\tMinVersion:               tls.VersionTLS12,\n   388→\t\t\tPreferServerCipherSuites: true,\n   389→\t\t})\n   390→\t\tcclog.Infof(\"HTTPS server listening at %s...\", config.Keys.Addr)\n   391→\t} else {\n   392→\t\tcclog.Infof(\"HTTP server listening at %s...\", config.Keys.Addr)\n   393→\t}\n   394→\t//\n   395→\t// Because this program will want to bind to a privileged port (like 80), the listener must\n   396→\t// be established first, then the user can be changed, and after that,\n   397→\t// the actual http server can be started.\n   398→\tif err := runtime.DropPrivileges(config.Keys.Group, config.Keys.User); err != nil {\n   399→\t\treturn fmt.Errorf(\"dropping privileges: %w\", err)\n   400→\t}\n   401→\n   402→\t// Handle context cancellation for graceful shutdown\n   403→\tgo func() {\n   404→\t\t<-ctx.Done()\n   405→\t\tshutdownCtx, cancel := context.WithTimeout(context.Background(), 30*time.Second)\n   406→\t\tdefer cancel()\n   407→\t\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n   408→\t\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n   409→\t\t}\n   410→\t}()\n   411→\n   412→\tif err = s.server.Serve(listener); err != nil && err != http.ErrServerClosed {\n   413→\t\treturn fmt.Errorf(\"server failed: %w\", err)\n   414→\t}\n   415→\treturn nil\n   416→}\n   417→\n   418→func (s *Server) Shutdown(ctx context.Context) {\n   419→\t// Create a shutdown context with timeout\n   420→\tshutdownCtx, cancel := context.WithTimeout(ctx, 30*time.Second)\n   421→\tdefer cancel()\n   422→\n   423→\tnc := nats.GetClient()\n   424→\tif nc != nil {\n   425→\t\tnc.Close()\n   426→\t}\n   427→\n   428→\t// First shut down the server gracefully (waiting for all ongoing requests)\n   429→\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n   430→\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n   431→\t}\n   432→\n   433→\t// Archive all the metric store data\n   434→\tms := metricstore.GetMemoryStore()\n   435→\n   436→\tif ms != nil {\n   437→\t\tmetricstore.Shutdown()\n   438→\t}\n   439→\n   440→\t// Shutdown archiver with 10 second timeout for fast shutdown\n   441→\tif err := archiver.Shutdown(10 * time.Second); err != nil {\n   442→\t\tcclog.Warnf(\"Archiver shutdown: %v\", err)\n   443→\t}\n   444→}\n   445→"}]},"uuid":"e1b9469d-dd87-402d-9b78-cd73ebe7cd3c","timestamp":"2026-03-24T06:13:00.164Z"},"type":"agent_progress","prompt":"","agentId":"aaa23999739ba99a2"},"toolUseID":"agent_msg_01Eui9SQzwKWPrGWGCejfBnX","parentToolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","uuid":"2f9240f3-fff4-4604-86d0-741a5f8c2676","timestamp":"2026-03-24T06:13:00.534Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"2f9240f3-fff4-4604-86d0-741a5f8c2676","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:13:00.546Z","message":{"model":"claude-opus-4-6","id":"msg_0133uc4dTKmU4J5Z81S3Bmfp","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_0119vHJs7ozGHr8HobEMA622","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go","offset":380,"limit":70},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":2584,"cache_read_input_tokens":14540,"cache_creation":{"ephemeral_5m_input_tokens":2584,"ephemeral_1h_input_tokens":0},"output_tokens":6,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQpZQmDg22j1UmD1AUC","uuid":"5ae21a2e-4f02-49b9-ae4f-7ca9e9618d63"},"type":"agent_progress","prompt":"","agentId":"aaa23999739ba99a2"},"toolUseID":"agent_msg_01Eui9SQzwKWPrGWGCejfBnX","parentToolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","uuid":"bfc72f49-2335-41d3-93f7-3f51e42c0e32","timestamp":"2026-03-24T06:13:00.547Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"bfc72f49-2335-41d3-93f7-3f51e42c0e32","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_0119vHJs7ozGHr8HobEMA622","type":"tool_result","content":"   380→\t// Initialize web UI\n   381→\tcfg := ccconf.GetPackageConfig(\"ui\")\n   382→\tif err := web.Init(cfg); err != nil {\n   383→\t\treturn fmt.Errorf(\"initializing web UI: %w\", err)\n   384→\t}\n   385→\n   386→\t// Initialize HTTP server\n   387→\tsrv, err := NewServer(version, commit, date)\n   388→\tif err != nil {\n   389→\t\treturn fmt.Errorf(\"creating server: %w\", err)\n   390→\t}\n   391→\n   392→\t// Channel to collect errors from server\n   393→\terrChan := make(chan error, 1)\n   394→\n   395→\t// Start HTTP server\n   396→\twg.Go(func() {\n   397→\t\tif err := srv.Start(ctx); err != nil {\n   398→\t\t\terrChan <- err\n   399→\t\t}\n   400→\t})\n   401→\n   402→\t// Handle shutdown signals\n   403→\twg.Add(1)\n   404→\tsigs := make(chan os.Signal, 1)\n   405→\tsignal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)\n   406→\tgo func() {\n   407→\t\tdefer wg.Done()\n   408→\t\tselect {\n   409→\t\tcase <-sigs:\n   410→\t\t\tcclog.Info(\"Shutdown signal received\")\n   411→\t\tcase <-ctx.Done():\n   412→\t\t}\n   413→\n   414→\t\truntime.SystemdNotify(false, \"Shutting down ...\")\n   415→\t\tsrv.Shutdown(ctx)\n   416→\t\tutil.FsWatcherShutdown()\n   417→\t\ttaskmanager.Shutdown()\n   418→\t}()\n   419→\n   420→\t// Set GC percent if not configured\n   421→\tif os.Getenv(envGOGC) == \"\" {\n   422→\t\t// trigger GC when heap grows 15% above the previous live set\n   423→\t\tdebug.SetGCPercent(15)\n   424→\t}\n   425→\truntime.SystemdNotify(true, \"running\")\n   426→\n   427→\twaitDone := make(chan struct{})\n   428→\tgo func() {\n   429→\t\twg.Wait()\n   430→\t\tclose(waitDone)\n   431→\t}()\n   432→\n   433→\tgo func() {\n   434→\t\t<-waitDone\n   435→\t\tclose(errChan)\n   436→\t}()\n   437→\n   438→\t// Wait for either:\n   439→\t// 1. An error from server startup\n   440→\t// 2. Completion of all goroutines (normal shutdown or crash)\n   441→\tselect {\n   442→\tcase err := <-errChan:\n   443→\t\t// errChan will be closed when waitDone is closed, which happens\n   444→\t\t// when all goroutines complete (either from normal shutdown or error)\n   445→\t\tif err != nil {\n   446→\t\t\treturn err\n   447→\t\t}\n   448→\tcase <-time.After(100 * time.Millisecond):\n   449→\t\t// Give the server 100ms to start and report any immediate startup errors"}]},"uuid":"1cbbf399-1313-4b4a-9142-b604a359c746","timestamp":"2026-03-24T06:13:00.550Z"},"type":"agent_progress","prompt":"","agentId":"aaa23999739ba99a2"},"toolUseID":"agent_msg_01Eui9SQzwKWPrGWGCejfBnX","parentToolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","uuid":"4b2f195f-2155-4ca9-8874-4376a0026949","timestamp":"2026-03-24T06:13:00.562Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"4b2f195f-2155-4ca9-8874-4376a0026949","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:13:05.521Z","message":{"model":"claude-opus-4-6","id":"msg_01BTFSVfF6oAkb9PsUyp29YG","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01E9wgNLj234WDE5dj6cURDc","name":"Grep","input":{"pattern":"func \\(s \\*Server\\) Start","path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go","output_mode":"content","-A":5},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":2435,"cache_read_input_tokens":17124,"cache_creation":{"ephemeral_5m_input_tokens":2435,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQq1NUFJxU56dEPReru","uuid":"24326daf-143d-421f-91d3-ae7077b20a4c"},"type":"agent_progress","prompt":"","agentId":"aaa23999739ba99a2"},"toolUseID":"agent_msg_01Eui9SQzwKWPrGWGCejfBnX","parentToolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","uuid":"89b50c3d-919c-4df8-bbd0-84ca006d050d","timestamp":"2026-03-24T06:13:05.521Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"89b50c3d-919c-4df8-bbd0-84ca006d050d","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01E9wgNLj234WDE5dj6cURDc","type":"tool_result","content":"351:func (s *Server) Start(ctx context.Context) error {\n352-\t// Use configurable timeouts with defaults\n353-\treadHeaderTimeout := time.Duration(defaultReadHeaderTimeout) * time.Second\n354-\twriteTimeout := time.Duration(defaultWriteTimeout) * time.Second\n355-\n356-\ts.server = &http.Server{"}]},"uuid":"58f63c6c-1b54-4b94-ab27-dcd7a3ed5fcb","timestamp":"2026-03-24T06:13:05.541Z"},"type":"agent_progress","prompt":"","agentId":"aaa23999739ba99a2"},"toolUseID":"agent_msg_01Eui9SQzwKWPrGWGCejfBnX","parentToolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","uuid":"4da1e41f-ae70-47d7-8718-082555a0210e","timestamp":"2026-03-24T06:13:05.999Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"4da1e41f-ae70-47d7-8718-082555a0210e","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:13:06.021Z","message":{"model":"claude-opus-4-6","id":"msg_01BTFSVfF6oAkb9PsUyp29YG","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_015Zhzvg1WFDqPnV48UEUuXo","name":"Grep","input":{"pattern":"func FsWatcherShutdown","output_mode":"content","-A":10},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":2435,"cache_read_input_tokens":17124,"cache_creation":{"ephemeral_5m_input_tokens":2435,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQq1NUFJxU56dEPReru","uuid":"fe461e04-580c-4e4e-b721-ee992036e852"},"type":"agent_progress","prompt":"","agentId":"aaa23999739ba99a2"},"toolUseID":"agent_msg_01Eui9SQzwKWPrGWGCejfBnX","parentToolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","uuid":"4b473bc0-3c5e-4909-9843-979f585e1b2f","timestamp":"2026-03-24T06:13:06.021Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"4b473bc0-3c5e-4909-9843-979f585e1b2f","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_015Zhzvg1WFDqPnV48UEUuXo","type":"tool_result","content":"No matches found"}]},"uuid":"c40721ce-68ca-47df-b9de-ca2bd3ef4628","timestamp":"2026-03-24T06:13:06.052Z"},"type":"agent_progress","prompt":"","agentId":"aaa23999739ba99a2"},"toolUseID":"agent_msg_01Eui9SQzwKWPrGWGCejfBnX","parentToolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","uuid":"ea6443bb-6a71-482e-9a59-9ee93a67394f","timestamp":"2026-03-24T06:13:06.053Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"ea6443bb-6a71-482e-9a59-9ee93a67394f","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-03-24T06:13:09.560Z","message":{"model":"claude-opus-4-6","id":"msg_011MpJA6bvkjkDChEray6mtD","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01PwZqtEwb7K9aeSuvWDJef9","name":"Grep","input":{"pattern":"FsWatcherShutdown","output_mode":"content","-A":10},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":435,"cache_read_input_tokens":19559,"cache_creation":{"ephemeral_5m_input_tokens":435,"ephemeral_1h_input_tokens":0},"output_tokens":70,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZMQqQr6PVqmbhukmDF7s","uuid":"bf358718-18aa-4a50-8198-b89b03092ba5"},"type":"agent_progress","prompt":"","agentId":"aaa23999739ba99a2"},"toolUseID":"agent_msg_01Eui9SQzwKWPrGWGCejfBnX","parentToolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","uuid":"6f1dbe71-a67b-4fc3-9c3a-3c48971b0c4f","timestamp":"2026-03-24T06:13:09.560Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"6f1dbe71-a67b-4fc3-9c3a-3c48971b0c4f","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01PwZqtEwb7K9aeSuvWDJef9","type":"tool_result","content":"cmd/cc-backend/main.go:416:\t\tutil.FsWatcherShutdown()\n/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go-417-\t\ttaskmanager.Shutdown()\n/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go-418-\t}()\n/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go-419-\n/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go-420-\t// Set GC percent if not configured\n/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go-421-\tif os.Getenv(envGOGC) == \"\" {\n/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go-422-\t\t// trigger GC when heap grows 15% above the previous live set\n/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go-423-\t\tdebug.SetGCPercent(15)\n/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go-424-\t}\n/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go-425-\truntime.SystemdNotify(true, \"running\")\n/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go-426-"}]},"uuid":"5c7facf9-eb54-4f7e-a49d-0d452685de22","timestamp":"2026-03-24T06:13:09.592Z"},"type":"agent_progress","prompt":"","agentId":"aaa23999739ba99a2"},"toolUseID":"agent_msg_01Eui9SQzwKWPrGWGCejfBnX","parentToolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","uuid":"7a13a21a-b5f3-4fda-ac41-d3813edd6467","timestamp":"2026-03-24T06:13:09.593Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"7a13a21a-b5f3-4fda-ac41-d3813edd6467","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Agent","command":"entire hooks claude-code post-task"},"parentToolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","toolUseID":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","timestamp":"2026-03-24T06:13:54.311Z","uuid":"060b1d5c-2682-425a-9bfe-62db3b97cbbb","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"f28e4553-a2a5-412e-88c5-0492aa743685","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01FLkMuLKuiaYGVeSCHYRdwU","type":"tool_result","content":[{"type":"text","text":"Now I have a full picture. Let me also verify a subtle issue -- the double HTTP shutdown. `Start()` at line 402-410 spawns a goroutine that calls `s.server.Shutdown()` when `ctx` is cancelled, and then `Shutdown()` at line 429 calls `s.server.Shutdown()` again. Let me check if the `ctx` passed to `srv.Shutdown(ctx)` at main.go:415 is already cancelled at that point.\n\nLooking at main.go:415 -- `srv.Shutdown(ctx)` is called in the signal handler goroutine. The `ctx` here is the context from the `run` function. When the signal arrives, `ctx` may or may not be cancelled. But the `Shutdown` method creates its own 30s timeout context from this `ctx`. Meanwhile, the goroutine in `Start()` at line 403 waits on `ctx.Done()` -- this fires when the parent context is cancelled.\n\nThe key observation: there may be a race where both paths try to shut down the HTTP server, but `http.Server.Shutdown` is safe to call multiple times. The real issue is that the `Shutdown()` method in server.go:418 calls `s.server.Shutdown(shutdownCtx)` with a fresh 30s timeout, blocking until the HTTP server is fully shut down or 30s passes.\n\nNow I have enough information for the plan.\n\n---\n\n## Implementation Plan: Reduce Shutdown Time from ~40s to ~10s\n\n### Problem Summary\n\nThe shutdown path in `server.go:Shutdown()` is fully sequential:\n\n1. NATS close (fast, ~0s)\n2. HTTP server shutdown with 30s timeout (blocks up to 30s)\n3. `metricstore.Shutdown()` with NO timeout (blocks for binary checkpoint writes -- 10-20s for large installations)\n4. `archiver.Shutdown()` with 10s timeout\n\nAdditionally, there is a duplicate HTTP shutdown path in `Start()` (line 402-410) that also uses a 30s timeout.\n\nWorst case: 30 + unbounded + 10 = 40s+\n\n### Solution: Three Changes\n\n#### Change 1: Reduce HTTP server shutdown timeout from 30s to 5s\n\n**File:** `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go`\n\nIn `Shutdown()` at line 420, change:\n```go\nshutdownCtx, cancel := context.WithTimeout(ctx, 30*time.Second)\n```\nto:\n```go\nshutdownCtx, cancel := context.WithTimeout(ctx, 5*time.Second)\n```\n\nAlso in `Start()` at line 405, change the goroutine's timeout from 30s to 5s:\n```go\nshutdownCtx, cancel := context.WithTimeout(context.Background(), 5*time.Second)\n```\n\nRationale: 5 seconds is more than enough for in-flight HTTP requests to complete. Most requests finish in milliseconds. The 30s timeout was overly generous and dominated shutdown time when the server was under load.\n\n#### Change 2: Run metricstore and archiver shutdown concurrently\n\n**File:** `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go`\n\nReplace the sequential metricstore + archiver shutdown (lines 433-443) with concurrent execution using a `sync.WaitGroup`:\n\n```go\nfunc (s *Server) Shutdown(ctx context.Context) {\n    shutdownCtx, cancel := context.WithTimeout(ctx, 5*time.Second)\n    defer cancel()\n\n    nc := nats.GetClient()\n    if nc != nil {\n        nc.Close()\n    }\n\n    // Shut down the HTTP server first (max 5s)\n    if err := s.server.Shutdown(shutdownCtx); err != nil {\n        cclog.Errorf(\"Server shutdown error: %v\", err)\n    }\n\n    // Shut down metricstore and archiver concurrently\n    var wg sync.WaitGroup\n\n    ms := metricstore.GetMemoryStore()\n    if ms != nil {\n        wg.Add(1)\n        go func() {\n            defer wg.Done()\n            metricstore.Shutdown()\n        }()\n    }\n\n    wg.Add(1)\n    go func() {\n        defer wg.Done()\n        if err := archiver.Shutdown(10 * time.Second); err != nil {\n            cclog.Warnf(\"Archiver shutdown: %v\", err)\n        }\n    }()\n\n    wg.Wait()\n}\n```\n\nThis means metricstore checkpoint writing and archiver drain happen at the same time instead of one after the other. Since they operate on completely independent resources (metricstore writes `.bin` files; archiver writes job archive files), there is no contention or ordering dependency.\n\nTime savings: archiver's 10s timeout now overlaps with metricstore's checkpoint write instead of adding to it.\n\n#### Change 3: Add an overall shutdown deadline\n\n**File:** `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go`\n\nWrap the entire `Shutdown()` body with an overall 10s deadline. If the deadline is exceeded, log a warning and return (the process will exit anyway, and the OS will reclaim resources). The WAL files on disk guarantee that no data is lost even if the final binary snapshot is incomplete -- on next startup, the WAL will be replayed.\n\n```go\nfunc (s *Server) Shutdown(ctx context.Context) {\n    deadline := time.After(10 * time.Second)\n    done := make(chan struct{})\n\n    go func() {\n        defer close(done)\n        // ... all shutdown logic from Change 2 goes here ...\n    }()\n\n    select {\n    case <-done:\n        cclog.Info(\"Shutdown completed successfully\")\n    case <-deadline:\n        cclog.Warn(\"Shutdown deadline (10s) exceeded, forcing exit\")\n    }\n}\n```\n\nThis guarantees the function returns within 10 seconds regardless of what metricstore or archiver are doing. Data integrity is maintained because:\n- The WAL format already provides crash recovery -- incomplete binary snapshots are handled by replaying WAL files on startup.\n- `ToCheckpointWAL` uses atomic rename (write to `.tmp` then rename), so partial writes do not corrupt existing snapshots.\n\n#### Change 4 (minor): Remove duplicate HTTP shutdown goroutine in Start()\n\n**File:** `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go`\n\nThe goroutine at lines 402-410 in `Start()` also calls `s.server.Shutdown()` when the context is cancelled. This is redundant with `Shutdown()` at line 429, which is the intended shutdown path (called from main.go:415). While calling `Shutdown` twice is safe (it's idempotent), the duplicate goroutine adds confusion and a competing timeout.\n\nRemove lines 402-410 entirely. The `Serve()` call at line 412 will return `http.ErrServerClosed` when `Shutdown()` is called from the signal handler, which is already handled correctly.\n\n### Resulting Shutdown Flow\n\nAfter all changes, the shutdown sequence becomes:\n\n```\nSignal received\n  |\n  v\nHTTP server shutdown (max 5s)\n  |\n  v\n[concurrent]\n  +-- metricstore.Shutdown() (checkpoint write, typically 5-15s, hard cap 10s)\n  +-- archiver.Shutdown()    (max 10s)\n  |\n  v (whichever finishes last, or 10s overall deadline)\n  |\n  v\nFsWatcherShutdown() + taskmanager.Shutdown() (fast)\n```\n\nWorst case: 5s (HTTP) + max(metricstore, archiver) capped at 5s remaining = **10s total**.\nTypical case: ~1s (HTTP) + ~5-8s (metricstore checkpoint) = **6-9s total**.\n\n### Import Changes\n\n**File:** `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go`\n\nAdd `\"sync\"` to imports if not already present.\n\n### Testing\n\n1. Run `go build ./cmd/cc-backend` to verify compilation.\n2. Run `go test ./cmd/cc-backend/...` if there are tests for the server.\n3. Manual test: start the server with sample data (`./startDemo.sh`), send SIGTERM, measure time to exit. Should be under 10s.\n4. Verify data integrity: after shutdown, restart and confirm checkpoint data is loaded correctly.\n\n### Critical Files for Implementation\n\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go` - Primary file: contains both `Start()` and `Shutdown()` methods that need modification\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go` - Reference: `Shutdown()` function to understand what it blocks on (no changes needed)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go` - Reference: `ToCheckpointWAL()` to confirm atomic-rename safety for the overall deadline approach\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go` - Context: shutdown signal handler that calls `srv.Shutdown(ctx)` (no changes needed)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go` - Reference: archiver `Shutdown()` to confirm no ordering dependency with metricstore"},{"type":"text","text":"agentId: aaa23999739ba99a2 (use SendMessage with to: 'aaa23999739ba99a2' to continue this agent)\n<usage>total_tokens: 22919\ntool_uses: 11\nduration_ms: 72039</usage>"}]}]},"uuid":"65b7746b-42b6-4338-bd6d-548dd7e62109","timestamp":"2026-03-24T06:13:54.310Z","toolUseResult":{"status":"completed","prompt":"Design an implementation plan to reduce the shutdown time of this Go backend from ~40s to ~10s.\n\n## Current Shutdown Flow (SEQUENTIAL, in server.go:418-444)\n\n```go\nfunc (s *Server) Shutdown(ctx context.Context) {\n    shutdownCtx, cancel := context.WithTimeout(ctx, 30*time.Second)  // 30s timeout\n    defer cancel()\n    nc := nats.GetClient()\n    if nc != nil { nc.Close() }\n    \n    // Step 1: HTTP server graceful shutdown — up to 30s timeout\n    s.server.Shutdown(shutdownCtx)\n    \n    // Step 2: metricstore.Shutdown() — NO TIMEOUT, writes binary snapshots for ALL hosts\n    metricstore.Shutdown()\n    \n    // Step 3: archiver.Shutdown(10s) — 10s timeout\n    archiver.Shutdown(10 * time.Second)\n}\n```\n\nThen in main.go:417, `taskmanager.Shutdown()` runs after.\n\n## Root Cause Analysis\n\nThe shutdown is sequential with generous/missing timeouts:\n- HTTP server gets up to 30s (server.go:420)\n- metricstore.Shutdown() has NO timeout — calls ToCheckpointWAL() which writes binary snapshot files for every host using a worker pool (walCheckpoint.go:627-702). This can take 20+ seconds for large installations.\n- archiver gets 10s (server.go:441)\n- Worst case sequential: 30 + unbounded + 10 = 40s+\n\nThe key issue is NOT the WAL drain (that's fast) — it's the final binary checkpoint write in ToCheckpointWAL().\n\n## metricstore.Shutdown() detail (metricstore.go:273-310)\n1. Cancels context (stops background goroutines)\n2. Closes WAL shard channels (triggers WAL staging goroutine drain)\n3. Calls ToCheckpointWAL() — THIS IS THE BOTTLENECK: writes .bin files for every host\n\n## Constraints\n- The final checkpoint MUST still be written for data integrity — we can't skip it\n- The WAL format means we have both WAL files AND periodic binary snapshots\n- Performance is critical (CLAUDE.md: \"prioritize maximum throughput and minimal latency\")\n- The archiver shutdown already has proper timeout handling with graceful cancellation\n\n## What to Optimize\n\n1. **Reduce HTTP server shutdown timeout** — 30s is excessive; 5s is plenty for graceful drain\n2. **Parallelize independent shutdown steps** — metricstore and archiver can shut down concurrently\n3. **Add overall shutdown deadline** — ensure total shutdown time is bounded\n4. **Keep ToCheckpointWAL as-is** — it's already parallelized with NumWorkers, and we need it for data integrity. The savings come from not waiting 30s for HTTP first.\n\nPlease provide a detailed implementation plan with specific code changes needed.\n","agentId":"aaa23999739ba99a2","content":[{"type":"text","text":"Now I have a full picture. Let me also verify a subtle issue -- the double HTTP shutdown. `Start()` at line 402-410 spawns a goroutine that calls `s.server.Shutdown()` when `ctx` is cancelled, and then `Shutdown()` at line 429 calls `s.server.Shutdown()` again. Let me check if the `ctx` passed to `srv.Shutdown(ctx)` at main.go:415 is already cancelled at that point.\n\nLooking at main.go:415 -- `srv.Shutdown(ctx)` is called in the signal handler goroutine. The `ctx` here is the context from the `run` function. When the signal arrives, `ctx` may or may not be cancelled. But the `Shutdown` method creates its own 30s timeout context from this `ctx`. Meanwhile, the goroutine in `Start()` at line 403 waits on `ctx.Done()` -- this fires when the parent context is cancelled.\n\nThe key observation: there may be a race where both paths try to shut down the HTTP server, but `http.Server.Shutdown` is safe to call multiple times. The real issue is that the `Shutdown()` method in server.go:418 calls `s.server.Shutdown(shutdownCtx)` with a fresh 30s timeout, blocking until the HTTP server is fully shut down or 30s passes.\n\nNow I have enough information for the plan.\n\n---\n\n## Implementation Plan: Reduce Shutdown Time from ~40s to ~10s\n\n### Problem Summary\n\nThe shutdown path in `server.go:Shutdown()` is fully sequential:\n\n1. NATS close (fast, ~0s)\n2. HTTP server shutdown with 30s timeout (blocks up to 30s)\n3. `metricstore.Shutdown()` with NO timeout (blocks for binary checkpoint writes -- 10-20s for large installations)\n4. `archiver.Shutdown()` with 10s timeout\n\nAdditionally, there is a duplicate HTTP shutdown path in `Start()` (line 402-410) that also uses a 30s timeout.\n\nWorst case: 30 + unbounded + 10 = 40s+\n\n### Solution: Three Changes\n\n#### Change 1: Reduce HTTP server shutdown timeout from 30s to 5s\n\n**File:** `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go`\n\nIn `Shutdown()` at line 420, change:\n```go\nshutdownCtx, cancel := context.WithTimeout(ctx, 30*time.Second)\n```\nto:\n```go\nshutdownCtx, cancel := context.WithTimeout(ctx, 5*time.Second)\n```\n\nAlso in `Start()` at line 405, change the goroutine's timeout from 30s to 5s:\n```go\nshutdownCtx, cancel := context.WithTimeout(context.Background(), 5*time.Second)\n```\n\nRationale: 5 seconds is more than enough for in-flight HTTP requests to complete. Most requests finish in milliseconds. The 30s timeout was overly generous and dominated shutdown time when the server was under load.\n\n#### Change 2: Run metricstore and archiver shutdown concurrently\n\n**File:** `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go`\n\nReplace the sequential metricstore + archiver shutdown (lines 433-443) with concurrent execution using a `sync.WaitGroup`:\n\n```go\nfunc (s *Server) Shutdown(ctx context.Context) {\n    shutdownCtx, cancel := context.WithTimeout(ctx, 5*time.Second)\n    defer cancel()\n\n    nc := nats.GetClient()\n    if nc != nil {\n        nc.Close()\n    }\n\n    // Shut down the HTTP server first (max 5s)\n    if err := s.server.Shutdown(shutdownCtx); err != nil {\n        cclog.Errorf(\"Server shutdown error: %v\", err)\n    }\n\n    // Shut down metricstore and archiver concurrently\n    var wg sync.WaitGroup\n\n    ms := metricstore.GetMemoryStore()\n    if ms != nil {\n        wg.Add(1)\n        go func() {\n            defer wg.Done()\n            metricstore.Shutdown()\n        }()\n    }\n\n    wg.Add(1)\n    go func() {\n        defer wg.Done()\n        if err := archiver.Shutdown(10 * time.Second); err != nil {\n            cclog.Warnf(\"Archiver shutdown: %v\", err)\n        }\n    }()\n\n    wg.Wait()\n}\n```\n\nThis means metricstore checkpoint writing and archiver drain happen at the same time instead of one after the other. Since they operate on completely independent resources (metricstore writes `.bin` files; archiver writes job archive files), there is no contention or ordering dependency.\n\nTime savings: archiver's 10s timeout now overlaps with metricstore's checkpoint write instead of adding to it.\n\n#### Change 3: Add an overall shutdown deadline\n\n**File:** `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go`\n\nWrap the entire `Shutdown()` body with an overall 10s deadline. If the deadline is exceeded, log a warning and return (the process will exit anyway, and the OS will reclaim resources). The WAL files on disk guarantee that no data is lost even if the final binary snapshot is incomplete -- on next startup, the WAL will be replayed.\n\n```go\nfunc (s *Server) Shutdown(ctx context.Context) {\n    deadline := time.After(10 * time.Second)\n    done := make(chan struct{})\n\n    go func() {\n        defer close(done)\n        // ... all shutdown logic from Change 2 goes here ...\n    }()\n\n    select {\n    case <-done:\n        cclog.Info(\"Shutdown completed successfully\")\n    case <-deadline:\n        cclog.Warn(\"Shutdown deadline (10s) exceeded, forcing exit\")\n    }\n}\n```\n\nThis guarantees the function returns within 10 seconds regardless of what metricstore or archiver are doing. Data integrity is maintained because:\n- The WAL format already provides crash recovery -- incomplete binary snapshots are handled by replaying WAL files on startup.\n- `ToCheckpointWAL` uses atomic rename (write to `.tmp` then rename), so partial writes do not corrupt existing snapshots.\n\n#### Change 4 (minor): Remove duplicate HTTP shutdown goroutine in Start()\n\n**File:** `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go`\n\nThe goroutine at lines 402-410 in `Start()` also calls `s.server.Shutdown()` when the context is cancelled. This is redundant with `Shutdown()` at line 429, which is the intended shutdown path (called from main.go:415). While calling `Shutdown` twice is safe (it's idempotent), the duplicate goroutine adds confusion and a competing timeout.\n\nRemove lines 402-410 entirely. The `Serve()` call at line 412 will return `http.ErrServerClosed` when `Shutdown()` is called from the signal handler, which is already handled correctly.\n\n### Resulting Shutdown Flow\n\nAfter all changes, the shutdown sequence becomes:\n\n```\nSignal received\n  |\n  v\nHTTP server shutdown (max 5s)\n  |\n  v\n[concurrent]\n  +-- metricstore.Shutdown() (checkpoint write, typically 5-15s, hard cap 10s)\n  +-- archiver.Shutdown()    (max 10s)\n  |\n  v (whichever finishes last, or 10s overall deadline)\n  |\n  v\nFsWatcherShutdown() + taskmanager.Shutdown() (fast)\n```\n\nWorst case: 5s (HTTP) + max(metricstore, archiver) capped at 5s remaining = **10s total**.\nTypical case: ~1s (HTTP) + ~5-8s (metricstore checkpoint) = **6-9s total**.\n\n### Import Changes\n\n**File:** `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go`\n\nAdd `\"sync\"` to imports if not already present.\n\n### Testing\n\n1. Run `go build ./cmd/cc-backend` to verify compilation.\n2. Run `go test ./cmd/cc-backend/...` if there are tests for the server.\n3. Manual test: start the server with sample data (`./startDemo.sh`), send SIGTERM, measure time to exit. Should be under 10s.\n4. Verify data integrity: after shutdown, restart and confirm checkpoint data is loaded correctly.\n\n### Critical Files for Implementation\n\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go` - Primary file: contains both `Start()` and `Shutdown()` methods that need modification\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go` - Reference: `Shutdown()` function to understand what it blocks on (no changes needed)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go` - Reference: `ToCheckpointWAL()` to confirm atomic-rename safety for the overall deadline approach\n- `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go` - Context: shutdown signal handler that calls `srv.Shutdown(ctx)` (no changes needed)\n- `/Users/jan/prg/ClusterCockpit/cc-backend/internal/archiver/archiveWorker.go` - Reference: archiver `Shutdown()` to confirm no ordering dependency with metricstore"}],"totalDurationMs":72039,"totalTokens":22919,"totalToolUseCount":11,"usage":{"input_tokens":1,"cache_creation_input_tokens":991,"cache_read_input_tokens":19559,"output_tokens":2368,"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":991},"inference_geo":"","iterations":[],"speed":"standard"}},"sourceToolAssistantUUID":"f28e4553-a2a5-412e-88c5-0492aa743685","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"65b7746b-42b6-4338-bd6d-548dd7e62109","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01TJfK5Us5awrwnMTLuJq22K","type":"message","role":"assistant","content":[{"type":"text","text":"\n\nLet me verify the `Start()` method to confirm the duplicate shutdown goroutine."}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":3,"cache_creation_input_tokens":5639,"cache_read_input_tokens":35516,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":5639},"output_tokens":2,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZMQu1UH3yjofskpYjSrC","type":"assistant","uuid":"74f4f284-8a2f-466b-a53c-a265d574e1be","timestamp":"2026-03-24T06:13:58.347Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"74f4f284-8a2f-466b-a53c-a265d574e1be","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01TJfK5Us5awrwnMTLuJq22K","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01Ertz83UVy1FESd5Ekcp5T8","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go","offset":395,"limit":25},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":3,"cache_creation_input_tokens":5639,"cache_read_input_tokens":35516,"output_tokens":133,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":5639,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZMQu1UH3yjofskpYjSrC","type":"assistant","uuid":"320814e0-f5fd-447a-bcc4-a87fe1eefb84","timestamp":"2026-03-24T06:13:58.904Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"320814e0-f5fd-447a-bcc4-a87fe1eefb84","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Read","command":"callback"},"parentToolUseID":"toolu_01Ertz83UVy1FESd5Ekcp5T8","toolUseID":"toolu_01Ertz83UVy1FESd5Ekcp5T8","timestamp":"2026-03-24T06:13:58.910Z","uuid":"a09038b2-c0c2-46ce-a913-de38194d1615","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"320814e0-f5fd-447a-bcc4-a87fe1eefb84","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01Ertz83UVy1FESd5Ekcp5T8","type":"tool_result","content":"   395→\t// Because this program will want to bind to a privileged port (like 80), the listener must\n   396→\t// be established first, then the user can be changed, and after that,\n   397→\t// the actual http server can be started.\n   398→\tif err := runtime.DropPrivileges(config.Keys.Group, config.Keys.User); err != nil {\n   399→\t\treturn fmt.Errorf(\"dropping privileges: %w\", err)\n   400→\t}\n   401→\n   402→\t// Handle context cancellation for graceful shutdown\n   403→\tgo func() {\n   404→\t\t<-ctx.Done()\n   405→\t\tshutdownCtx, cancel := context.WithTimeout(context.Background(), 30*time.Second)\n   406→\t\tdefer cancel()\n   407→\t\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n   408→\t\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n   409→\t\t}\n   410→\t}()\n   411→\n   412→\tif err = s.server.Serve(listener); err != nil && err != http.ErrServerClosed {\n   413→\t\treturn fmt.Errorf(\"server failed: %w\", err)\n   414→\t}\n   415→\treturn nil\n   416→}\n   417→\n   418→func (s *Server) Shutdown(ctx context.Context) {\n   419→\t// Create a shutdown context with timeout"}]},"uuid":"c7b38ef7-9da4-421b-9c14-15f697a9422e","timestamp":"2026-03-24T06:13:58.909Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go","content":"\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","numLines":25,"startLine":395,"totalLines":445}},"sourceToolAssistantUUID":"320814e0-f5fd-447a-bcc4-a87fe1eefb84","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"c7b38ef7-9da4-421b-9c14-15f697a9422e","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01R57uTV2mAjnodfTxwCEXps","type":"message","role":"assistant","content":[{"type":"thinking","thinking":"","signature":"EocHCkYIDBgCKkA9IwXctRs3az3SYdwd1Oug3F+yK5NQF5kR8ow6/1p4v5wwr50n5TorcDrhzuA3dHZV6mV9FueIxfyc9sE7ZlABEgw5N+DnNmQNMC4jmhYaDARmlZ07kRykAsC8HyIwWvLICwWtUReBuY6zeXj+uAknOMlCFclmqHPcsPacJfbIFpbX2xd8j9BJTcUhhQMZKu4F7D49AzFFVYbvqbr3uhfPFIAd0M4gVoX5ceZfFfKU9GZiPKe2jYzn1NIdld5B/Aeh4p6x1fdZdOOxWeEZX8R8hEBQGAixJdWqeUREsDhwwbD2airQxEIGMcy0oRcUC6WOjJZ7O0zsse4UCm51z4YTuZKwQZo6WPCZJJIvPtzFZlwx1q8Mce0sgncJr5Z7MaBRqjrV7V0sQHuXOniD9HZ8OegrZDzFpnK8Y2g72NvpJ+zkqbpFJV+/fyAVItBCpTfHypJ++wqsmwq9hUfj7gsN+pZ5Dk47iaDZzt2xHtmjDzguTAHBQp3wY6R/aSh6NSprh2idegEIRx3n72de694GxRw7A1PbqLnnu6JCGn4xc1llEW2eqZdUfT3FAM3ytkaVP0LWxYn849f1bcLzkHrMcp1uoYnzszhLmXbRdY4vp4lqsPZDfLq0+Mvo7eDXP4k+EtB85jKxOWP5QGiPazJEo2dKd8LuX59akwYHNTqEYcl2MpxKI4cgY0bUnRBva9h+XsTyAcOnC1up/9DOf1kGXDcqluLSMV4ZSlaQssCFNgbYzRlsMUmm2w3Yoh1+i8YXh6H1AlDy2ScwoG3kJGw1EK+0ZMf3wIlVgnsZ5Qstpoz226qicahmLFyLAxMLVRzGlZbyA6OGg94Bz9pMxczUqDb66QpRNeKvWIDNEBdRMMC4OKB1mNm2CiZFIurPFICzjaIUJMU0AEmZ55Ia7hImZXd9qsUn5tAGWNZlh4LP5ottOwMgU0/8dlAvsnziDLNXcSDK3HZwgnmLSbzL/7OGzcbWs+HqyzLkHbdvh0n1UzUes8a2k9o2TVUz1+SmiA0v2nz3mHTn1C8wN0spuLhE/Br75pwSJW0cUme/RPe4r0CEJouyiwiSG0rwybujnU3HyCD8P+3oZc7lbQdKe+7ul+667mOp9E4qF8+ZcF7mJRmcsX4h40KBtngi+VKMCIZ4ZLUetrk/REhPcCwmMY6SelGVWoHwF+autrM4pJ6eGAE="}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":506,"cache_read_input_tokens":41155,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":506},"output_tokens":8,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZMQuJpKF71VjyAGQc1s9","type":"assistant","uuid":"92614471-4824-4827-9b85-afbcd4a3f10e","timestamp":"2026-03-24T06:14:04.891Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"92614471-4824-4827-9b85-afbcd4a3f10e","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01R57uTV2mAjnodfTxwCEXps","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_0165sMG4WaoNSfa6pEJKky6a","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go","offset":330,"limit":30},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":506,"cache_read_input_tokens":41155,"output_tokens":357,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":506,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZMQuJpKF71VjyAGQc1s9","type":"assistant","uuid":"88b9d8e4-c5c6-47ea-bb12-2df4e615bb28","timestamp":"2026-03-24T06:14:05.524Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"88b9d8e4-c5c6-47ea-bb12-2df4e615bb28","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Read","command":"callback"},"parentToolUseID":"toolu_0165sMG4WaoNSfa6pEJKky6a","toolUseID":"toolu_0165sMG4WaoNSfa6pEJKky6a","timestamp":"2026-03-24T06:14:05.531Z","uuid":"8db12aa7-cf79-4528-b03c-361979dbc621","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"88b9d8e4-c5c6-47ea-bb12-2df4e615bb28","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_0165sMG4WaoNSfa6pEJKky6a","type":"tool_result","content":"   330→\n   331→\t\tif err := tagger.RunTaggers(); err != nil {\n   332→\t\t\treturn fmt.Errorf(\"running job taggers: %w\", err)\n   333→\t\t}\n   334→\t}\n   335→\n   336→\treturn nil\n   337→}\n   338→\n   339→func runServer(ctx context.Context) error {\n   340→\tvar wg sync.WaitGroup\n   341→\n   342→\t// Initialize metric store if configuration is provided\n   343→\thaveMetricstore := false\n   344→\tmscfg := ccconf.GetPackageConfig(\"metric-store\")\n   345→\tif mscfg != nil {\n   346→\t\tmetrics := metricstore.BuildMetricList()\n   347→\t\tmetricstore.Init(mscfg, metrics, &wg)\n   348→\n   349→\t\t// Inject repository as NodeProvider to break import cycle\n   350→\t\tms := metricstore.GetMemoryStore()\n   351→\t\tjobRepo := repository.GetJobRepository()\n   352→\t\tms.SetNodeProvider(jobRepo)\n   353→\t\tmetricstore.MetricStoreHandle = &metricstore.InternalMetricStore{}\n   354→\t\thaveMetricstore = true\n   355→\t} else {\n   356→\t\tmetricstore.MetricStoreHandle = nil\n   357→\t\tcclog.Debug(\"missing internal metricstore configuration\")\n   358→\t}\n   359→"}]},"uuid":"3253bc36-027a-4dae-9b0e-37db54affb26","timestamp":"2026-03-24T06:14:05.531Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go","content":"\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","numLines":30,"startLine":330,"totalLines":595}},"sourceToolAssistantUUID":"88b9d8e4-c5c6-47ea-bb12-2df4e615bb28","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"3253bc36-027a-4dae-9b0e-37db54affb26","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_012kC1ELvpbX3xXJz2BeTVAe","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_019NaPx1yNj1oK4XbcfuACdi","name":"Grep","input":{"pattern":"runServer\\(","path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go","output_mode":"content","-B":5},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":728,"cache_read_input_tokens":41661,"output_tokens":135,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":728,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZMQuobRzXdcJ3U4T9sAP","type":"assistant","uuid":"eedeb6a8-59e1-4e8b-b006-546d22b8941f","timestamp":"2026-03-24T06:14:09.553Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"eedeb6a8-59e1-4e8b-b006-546d22b8941f","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Grep","command":"callback"},"parentToolUseID":"toolu_019NaPx1yNj1oK4XbcfuACdi","toolUseID":"toolu_019NaPx1yNj1oK4XbcfuACdi","timestamp":"2026-03-24T06:14:09.573Z","uuid":"b69c28a4-de77-4bad-a0b6-67aee949b616","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"eedeb6a8-59e1-4e8b-b006-546d22b8941f","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_019NaPx1yNj1oK4XbcfuACdi","type":"tool_result","content":"334-\t}\n335-\n336-\treturn nil\n337-}\n338-\n339:func runServer(ctx context.Context) error {\n--\n581-\n582-\t// Run server with context\n583-\tctx, cancel := context.WithCancel(context.Background())\n584-\tdefer cancel()\n585-\n586:\treturn runServer(ctx)"}]},"uuid":"c402f95e-6b80-4b5a-ab6d-efc7cca7f6b6","timestamp":"2026-03-24T06:14:09.573Z","toolUseResult":{"mode":"content","numFiles":0,"filenames":[],"content":"334-\t}\n335-\n336-\treturn nil\n337-}\n338-\n339:func runServer(ctx context.Context) error {\n--\n581-\n582-\t// Run server with context\n583-\tctx, cancel := context.WithCancel(context.Background())\n584-\tdefer cancel()\n585-\n586:\treturn runServer(ctx)","numLines":13},"sourceToolAssistantUUID":"eedeb6a8-59e1-4e8b-b006-546d22b8941f","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"c402f95e-6b80-4b5a-ab6d-efc7cca7f6b6","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01HLVpGrh8rxqRnPN2HvqG6E","type":"message","role":"assistant","content":[{"type":"text","text":"So `ctx` is a `context.WithCancel(context.Background())` that is never explicitly cancelled during shutdown — only `defer cancel()` when the function returns. That means the goroutine in `Start()` (line 402-410) only fires when the process is already exiting. The `srv.Shutdown(ctx)` in server.go:429 is the primary shutdown path and fires first. The duplicate in `Start()` fires later when `ctx` gets cancelled by the deferred `cancel()`. Since `http.Server.Shutdown` is idempotent the second call is harmless but wasteful.\n\nNow I have everything. Let me write the plan."}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":232,"cache_read_input_tokens":42389,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":232},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZMQv6USP8keHk7nL3nEK","type":"assistant","uuid":"8c1c0f6e-8126-4975-a961-286f340a6faa","timestamp":"2026-03-24T06:14:16.123Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"type":"file-history-snapshot","messageId":"aca76a59-9375-48b1-bc2a-89adfec07845","snapshot":{"messageId":"31333ebb-5625-4704-898f-d051a650a9c0","trackedFileBackups":{"/Users/jan/.claude/plans/whimsical-churning-platypus.md":{"backupFileName":null,"version":1,"backupTime":"2026-03-24T06:14:34.491Z"}},"timestamp":"2026-03-24T06:09:34.257Z"},"isSnapshotUpdate":true}
{"parentUuid":"8c1c0f6e-8126-4975-a961-286f340a6faa","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01HLVpGrh8rxqRnPN2HvqG6E","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01VuGxLi8M4xqiPaFB9Es7N1","name":"Write","input":{"file_path":"/Users/jan/.claude/plans/whimsical-churning-platypus.md","content":"# Plan: Reduce Shutdown Time from ~40s to ~10s\n\n## Context\n\nShutdown has regressed from ~10s to ~40s. The root cause is the **fully sequential** shutdown in `server.go:Shutdown()`:\n\n1. HTTP server graceful shutdown — **30s timeout** (line 420)\n2. `metricstore.Shutdown()` — **no timeout**, writes binary snapshots for all hosts (line 437)\n3. `archiver.Shutdown(10s)` — **10s timeout** (line 441)\n\nWorst case sequential: 30 + unbounded + 10 = 40s+. Steps 2 and 3 are independent and can run concurrently. The HTTP timeout is also excessive.\n\nAdditionally, `Start()` (line 402-410) has a duplicate HTTP shutdown goroutine with its own 30s timeout that fires redundantly.\n\n## Changes\n\n### 1. Reduce HTTP server shutdown timeout: 30s -> 5s\n\n**File:** `cmd/cc-backend/server.go:420`\n\n5s is plenty for in-flight HTTP requests. Most complete in milliseconds.\n\n### 2. Remove duplicate shutdown goroutine in `Start()`\n\n**File:** `cmd/cc-backend/server.go:402-410`\n\nRemove the `go func() { <-ctx.Done(); s.server.Shutdown(...) }()` block. The `Shutdown()` method (called from the signal handler in main.go:415) is the primary path. The duplicate only fires later when `ctx` is cancelled by the deferred `cancel()` in `main()` — after everything is already shut down.\n\nAfter removal, `Start()` just calls `s.server.Serve(listener)` which returns `http.ErrServerClosed` when `Shutdown()` closes the server.\n\n### 3. Run metricstore and archiver shutdown concurrently with overall deadline\n\n**File:** `cmd/cc-backend/server.go:418-444`\n\nReplace sequential metricstore + archiver shutdown with concurrent execution, wrapped in an overall 10s deadline:\n\n```go\nfunc (s *Server) Shutdown(ctx context.Context) {\n    shutdownCtx, cancel := context.WithTimeout(ctx, 5*time.Second)\n    defer cancel()\n\n    nc := nats.GetClient()\n    if nc != nil {\n        nc.Close()\n    }\n\n    if err := s.server.Shutdown(shutdownCtx); err != nil {\n        cclog.Errorf(\"Server shutdown error: %v\", err)\n    }\n\n    // Run metricstore and archiver shutdown concurrently.\n    // They are independent: metricstore writes .bin snapshots,\n    // archiver flushes pending job archives.\n    done := make(chan struct{})\n    go func() {\n        defer close(done)\n        var wg sync.WaitGroup\n\n        ms := metricstore.GetMemoryStore()\n        if ms != nil {\n            wg.Add(1)\n            go func() {\n                defer wg.Done()\n                metricstore.Shutdown()\n            }()\n        }\n\n        wg.Add(1)\n        go func() {\n            defer wg.Done()\n            if err := archiver.Shutdown(10 * time.Second); err != nil {\n                cclog.Warnf(\"Archiver shutdown: %v\", err)\n            }\n        }()\n\n        wg.Wait()\n    }()\n\n    select {\n    case <-done:\n    case <-time.After(10 * time.Second):\n        cclog.Warn(\"Shutdown deadline exceeded, forcing exit\")\n    }\n}\n```\n\nData integrity is safe because:\n- WAL files on disk provide crash recovery — incomplete binary snapshots are handled by replaying WAL on next startup\n- `toCheckpointBinary` uses atomic rename (write `.tmp` then rename), so partial writes don't corrupt existing snapshots\n\n### Resulting Timeline\n\n```\nSignal → HTTP shutdown (max 5s) → concurrent(metricstore, archiver) → done\n                                   ↑ overall 10s deadline from signal\n```\n\nTypical: ~1s (HTTP) + ~5-8s (checkpoint) = **6-9s total**\nWorst case: capped at **~15s** (5s HTTP + 10s deadline)\n\n## Files to Modify\n\n- `cmd/cc-backend/server.go` — all changes here (add `\"sync\"` and `\"time\"` imports if needed)\n\n## Verification\n\n1. `go build ./cmd/cc-backend` — compiles\n2. Start with `./startDemo.sh`, send SIGTERM, measure exit time\n3. Restart and verify checkpoint data loads correctly (no data loss)\n"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":232,"cache_read_input_tokens":42389,"output_tokens":1366,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":232,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZMQv6USP8keHk7nL3nEK","type":"assistant","uuid":"aca76a59-9375-48b1-bc2a-89adfec07845","timestamp":"2026-03-24T06:14:34.480Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"aca76a59-9375-48b1-bc2a-89adfec07845","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Write","command":"callback"},"parentToolUseID":"toolu_01VuGxLi8M4xqiPaFB9Es7N1","toolUseID":"toolu_01VuGxLi8M4xqiPaFB9Es7N1","timestamp":"2026-03-24T06:14:34.494Z","uuid":"3f0d0b24-e05f-4f71-aa66-803db1415358","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"aca76a59-9375-48b1-bc2a-89adfec07845","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01VuGxLi8M4xqiPaFB9Es7N1","type":"tool_result","content":"File created successfully at: /Users/jan/.claude/plans/whimsical-churning-platypus.md"}]},"uuid":"30c79624-4f9c-449e-8290-2f1807424ca8","timestamp":"2026-03-24T06:14:34.494Z","toolUseResult":{"type":"create","filePath":"/Users/jan/.claude/plans/whimsical-churning-platypus.md","content":"# Plan: Reduce Shutdown Time from ~40s to ~10s\n\n## Context\n\nShutdown has regressed from ~10s to ~40s. The root cause is the **fully sequential** shutdown in `server.go:Shutdown()`:\n\n1. HTTP server graceful shutdown — **30s timeout** (line 420)\n2. `metricstore.Shutdown()` — **no timeout**, writes binary snapshots for all hosts (line 437)\n3. `archiver.Shutdown(10s)` — **10s timeout** (line 441)\n\nWorst case sequential: 30 + unbounded + 10 = 40s+. Steps 2 and 3 are independent and can run concurrently. The HTTP timeout is also excessive.\n\nAdditionally, `Start()` (line 402-410) has a duplicate HTTP shutdown goroutine with its own 30s timeout that fires redundantly.\n\n## Changes\n\n### 1. Reduce HTTP server shutdown timeout: 30s -> 5s\n\n**File:** `cmd/cc-backend/server.go:420`\n\n5s is plenty for in-flight HTTP requests. Most complete in milliseconds.\n\n### 2. Remove duplicate shutdown goroutine in `Start()`\n\n**File:** `cmd/cc-backend/server.go:402-410`\n\nRemove the `go func() { <-ctx.Done(); s.server.Shutdown(...) }()` block. The `Shutdown()` method (called from the signal handler in main.go:415) is the primary path. The duplicate only fires later when `ctx` is cancelled by the deferred `cancel()` in `main()` — after everything is already shut down.\n\nAfter removal, `Start()` just calls `s.server.Serve(listener)` which returns `http.ErrServerClosed` when `Shutdown()` closes the server.\n\n### 3. Run metricstore and archiver shutdown concurrently with overall deadline\n\n**File:** `cmd/cc-backend/server.go:418-444`\n\nReplace sequential metricstore + archiver shutdown with concurrent execution, wrapped in an overall 10s deadline:\n\n```go\nfunc (s *Server) Shutdown(ctx context.Context) {\n    shutdownCtx, cancel := context.WithTimeout(ctx, 5*time.Second)\n    defer cancel()\n\n    nc := nats.GetClient()\n    if nc != nil {\n        nc.Close()\n    }\n\n    if err := s.server.Shutdown(shutdownCtx); err != nil {\n        cclog.Errorf(\"Server shutdown error: %v\", err)\n    }\n\n    // Run metricstore and archiver shutdown concurrently.\n    // They are independent: metricstore writes .bin snapshots,\n    // archiver flushes pending job archives.\n    done := make(chan struct{})\n    go func() {\n        defer close(done)\n        var wg sync.WaitGroup\n\n        ms := metricstore.GetMemoryStore()\n        if ms != nil {\n            wg.Add(1)\n            go func() {\n                defer wg.Done()\n                metricstore.Shutdown()\n            }()\n        }\n\n        wg.Add(1)\n        go func() {\n            defer wg.Done()\n            if err := archiver.Shutdown(10 * time.Second); err != nil {\n                cclog.Warnf(\"Archiver shutdown: %v\", err)\n            }\n        }()\n\n        wg.Wait()\n    }()\n\n    select {\n    case <-done:\n    case <-time.After(10 * time.Second):\n        cclog.Warn(\"Shutdown deadline exceeded, forcing exit\")\n    }\n}\n```\n\nData integrity is safe because:\n- WAL files on disk provide crash recovery — incomplete binary snapshots are handled by replaying WAL on next startup\n- `toCheckpointBinary` uses atomic rename (write `.tmp` then rename), so partial writes don't corrupt existing snapshots\n\n### Resulting Timeline\n\n```\nSignal → HTTP shutdown (max 5s) → concurrent(metricstore, archiver) → done\n                                   ↑ overall 10s deadline from signal\n```\n\nTypical: ~1s (HTTP) + ~5-8s (checkpoint) = **6-9s total**\nWorst case: capped at **~15s** (5s HTTP + 10s deadline)\n\n## Files to Modify\n\n- `cmd/cc-backend/server.go` — all changes here (add `\"sync\"` and `\"time\"` imports if needed)\n\n## Verification\n\n1. `go build ./cmd/cc-backend` — compiles\n2. Start with `./startDemo.sh`, send SIGTERM, measure exit time\n3. Restart and verify checkpoint data loads correctly (no data loss)\n","structuredPatch":[],"originalFile":null},"sourceToolAssistantUUID":"aca76a59-9375-48b1-bc2a-89adfec07845","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"30c79624-4f9c-449e-8290-2f1807424ca8","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_012WkvsXdU7nvFHdJQLW79ou","type":"message","role":"assistant","content":[{"type":"text","text":"The plan is ready. Three targeted changes, all in `server.go`:\n\n1. **Reduce HTTP timeout** from 30s to 5s\n2. **Remove duplicate shutdown goroutine** in `Start()`\n3. **Run metricstore + archiver concurrently** with a 10s overall deadline\n\nThe biggest win comes from parallelizing metricstore and archiver (they're independent) and not waiting 30s for HTTP drain. Data integrity is preserved because WAL replay handles incomplete snapshots on restart."}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":1855,"cache_read_input_tokens":42621,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":1855},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZMQww6w2dUZxmrZnXRnB","type":"assistant","uuid":"80713068-7f61-4197-bddf-70ab8b993876","timestamp":"2026-03-24T06:14:39.736Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"80713068-7f61-4197-bddf-70ab8b993876","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_012WkvsXdU7nvFHdJQLW79ou","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01N9Rs1VDfHEVuaAi8RyRFjo","name":"ToolSearch","input":{"query":"select:ExitPlanMode","max_results":1},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":1855,"cache_read_input_tokens":42621,"output_tokens":195,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":1855,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZMQww6w2dUZxmrZnXRnB","type":"assistant","uuid":"1b2c1ef1-9b59-4b68-86c1-0aaa55e0ac3c","timestamp":"2026-03-24T06:14:40.047Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"1b2c1ef1-9b59-4b68-86c1-0aaa55e0ac3c","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","type":"user","message":{"role":"user","content":[{"type":"tool_result","tool_use_id":"toolu_01N9Rs1VDfHEVuaAi8RyRFjo","content":[{"type":"tool_reference","tool_name":"ExitPlanMode"}]}]},"uuid":"f7ce361b-adf1-442d-b71c-39e87fb3d4d9","timestamp":"2026-03-24T06:14:40.049Z","toolUseResult":{"matches":["ExitPlanMode"],"query":"select:ExitPlanMode","total_deferred_tools":22},"sourceToolAssistantUUID":"1b2c1ef1-9b59-4b68-86c1-0aaa55e0ac3c","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"f7ce361b-adf1-442d-b71c-39e87fb3d4d9","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01GGPJxrgdohf8L4Bmvz6cuc","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01TzDwgYR3LumG9XE8NV1rtp","name":"ExitPlanMode","input":{"allowedPrompts":[{"tool":"Bash","prompt":"build the Go backend"}],"plan":"# Plan: Reduce Shutdown Time from ~40s to ~10s\n\n## Context\n\nShutdown has regressed from ~10s to ~40s. The root cause is the **fully sequential** shutdown in `server.go:Shutdown()`:\n\n1. HTTP server graceful shutdown — **30s timeout** (line 420)\n2. `metricstore.Shutdown()` — **no timeout**, writes binary snapshots for all hosts (line 437)\n3. `archiver.Shutdown(10s)` — **10s timeout** (line 441)\n\nWorst case sequential: 30 + unbounded + 10 = 40s+. Steps 2 and 3 are independent and can run concurrently. The HTTP timeout is also excessive.\n\nAdditionally, `Start()` (line 402-410) has a duplicate HTTP shutdown goroutine with its own 30s timeout that fires redundantly.\n\n## Changes\n\n### 1. Reduce HTTP server shutdown timeout: 30s -> 5s\n\n**File:** `cmd/cc-backend/server.go:420`\n\n5s is plenty for in-flight HTTP requests. Most complete in milliseconds.\n\n### 2. Remove duplicate shutdown goroutine in `Start()`\n\n**File:** `cmd/cc-backend/server.go:402-410`\n\nRemove the `go func() { <-ctx.Done(); s.server.Shutdown(...) }()` block. The `Shutdown()` method (called from the signal handler in main.go:415) is the primary path. The duplicate only fires later when `ctx` is cancelled by the deferred `cancel()` in `main()` — after everything is already shut down.\n\nAfter removal, `Start()` just calls `s.server.Serve(listener)` which returns `http.ErrServerClosed` when `Shutdown()` closes the server.\n\n### 3. Run metricstore and archiver shutdown concurrently with overall deadline\n\n**File:** `cmd/cc-backend/server.go:418-444`\n\nReplace sequential metricstore + archiver shutdown with concurrent execution, wrapped in an overall 10s deadline:\n\n```go\nfunc (s *Server) Shutdown(ctx context.Context) {\n    shutdownCtx, cancel := context.WithTimeout(ctx, 5*time.Second)\n    defer cancel()\n\n    nc := nats.GetClient()\n    if nc != nil {\n        nc.Close()\n    }\n\n    if err := s.server.Shutdown(shutdownCtx); err != nil {\n        cclog.Errorf(\"Server shutdown error: %v\", err)\n    }\n\n    // Run metricstore and archiver shutdown concurrently.\n    // They are independent: metricstore writes .bin snapshots,\n    // archiver flushes pending job archives.\n    done := make(chan struct{})\n    go func() {\n        defer close(done)\n        var wg sync.WaitGroup\n\n        ms := metricstore.GetMemoryStore()\n        if ms != nil {\n            wg.Add(1)\n            go func() {\n                defer wg.Done()\n                metricstore.Shutdown()\n            }()\n        }\n\n        wg.Add(1)\n        go func() {\n            defer wg.Done()\n            if err := archiver.Shutdown(10 * time.Second); err != nil {\n                cclog.Warnf(\"Archiver shutdown: %v\", err)\n            }\n        }()\n\n        wg.Wait()\n    }()\n\n    select {\n    case <-done:\n    case <-time.After(10 * time.Second):\n        cclog.Warn(\"Shutdown deadline exceeded, forcing exit\")\n    }\n}\n```\n\nData integrity is safe because:\n- WAL files on disk provide crash recovery — incomplete binary snapshots are handled by replaying WAL on next startup\n- `toCheckpointBinary` uses atomic rename (write `.tmp` then rename), so partial writes don't corrupt existing snapshots\n\n### Resulting Timeline\n\n```\nSignal → HTTP shutdown (max 5s) → concurrent(metricstore, archiver) → done\n                                   ↑ overall 10s deadline from signal\n```\n\nTypical: ~1s (HTTP) + ~5-8s (checkpoint) = **6-9s total**\nWorst case: capped at **~15s** (5s HTTP + 10s deadline)\n\n## Files to Modify\n\n- `cmd/cc-backend/server.go` — all changes here (add `\"sync\"` and `\"time\"` imports if needed)\n\n## Verification\n\n1. `go build ./cmd/cc-backend` — compiles\n2. Start with `./startDemo.sh`, send SIGTERM, measure exit time\n3. Restart and verify checkpoint data loads correctly (no data loss)\n","planFilePath":"/Users/jan/.claude/plans/whimsical-churning-platypus.md"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":3,"cache_creation_input_tokens":855,"cache_read_input_tokens":44476,"output_tokens":76,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":855,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZMQxLsRkZiMDgndUSQbs","type":"assistant","uuid":"d319ea42-5bde-4c45-ab8e-0229ed0978ca","timestamp":"2026-03-24T06:14:43.272Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"d319ea42-5bde-4c45-ab8e-0229ed0978ca","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","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/whimsical-churning-platypus.md\nYou can refer back to it if needed during implementation.\n\n## Approved Plan:\n# Plan: Reduce Shutdown Time from ~40s to ~10s\n\n## Context\n\nShutdown has regressed from ~10s to ~40s. The root cause is the **fully sequential** shutdown in `server.go:Shutdown()`:\n\n1. HTTP server graceful shutdown — **30s timeout** (line 420)\n2. `metricstore.Shutdown()` — **no timeout**, writes binary snapshots for all hosts (line 437)\n3. `archiver.Shutdown(10s)` — **10s timeout** (line 441)\n\nWorst case sequential: 30 + unbounded + 10 = 40s+. Steps 2 and 3 are independent and can run concurrently. The HTTP timeout is also excessive.\n\nAdditionally, `Start()` (line 402-410) has a duplicate HTTP shutdown goroutine with its own 30s timeout that fires redundantly.\n\n## Changes\n\n### 1. Reduce HTTP server shutdown timeout: 30s -> 5s\n\n**File:** `cmd/cc-backend/server.go:420`\n\n5s is plenty for in-flight HTTP requests. Most complete in milliseconds.\n\n### 2. Remove duplicate shutdown goroutine in `Start()`\n\n**File:** `cmd/cc-backend/server.go:402-410`\n\nRemove the `go func() { <-ctx.Done(); s.server.Shutdown(...) }()` block. The `Shutdown()` method (called from the signal handler in main.go:415) is the primary path. The duplicate only fires later when `ctx` is cancelled by the deferred `cancel()` in `main()` — after everything is already shut down.\n\nAfter removal, `Start()` just calls `s.server.Serve(listener)` which returns `http.ErrServerClosed` when `Shutdown()` closes the server.\n\n### 3. Run metricstore and archiver shutdown concurrently with overall deadline\n\n**File:** `cmd/cc-backend/server.go:418-444`\n\nReplace sequential metricstore + archiver shutdown with concurrent execution, wrapped in an overall 10s deadline:\n\n```go\nfunc (s *Server) Shutdown(ctx context.Context) {\n    shutdownCtx, cancel := context.WithTimeout(ctx, 5*time.Second)\n    defer cancel()\n\n    nc := nats.GetClient()\n    if nc != nil {\n        nc.Close()\n    }\n\n    if err := s.server.Shutdown(shutdownCtx); err != nil {\n        cclog.Errorf(\"Server shutdown error: %v\", err)\n    }\n\n    // Run metricstore and archiver shutdown concurrently.\n    // They are independent: metricstore writes .bin snapshots,\n    // archiver flushes pending job archives.\n    done := make(chan struct{})\n    go func() {\n        defer close(done)\n        var wg sync.WaitGroup\n\n        ms := metricstore.GetMemoryStore()\n        if ms != nil {\n            wg.Add(1)\n            go func() {\n                defer wg.Done()\n                metricstore.Shutdown()\n            }()\n        }\n\n        wg.Add(1)\n        go func() {\n            defer wg.Done()\n            if err := archiver.Shutdown(10 * time.Second); err != nil {\n                cclog.Warnf(\"Archiver shutdown: %v\", err)\n            }\n        }()\n\n        wg.Wait()\n    }()\n\n    select {\n    case <-done:\n    case <-time.After(10 * time.Second):\n        cclog.Warn(\"Shutdown deadline exceeded, forcing exit\")\n    }\n}\n```\n\nData integrity is safe because:\n- WAL files on disk provide crash recovery — incomplete binary snapshots are handled by replaying WAL on next startup\n- `toCheckpointBinary` uses atomic rename (write `.tmp` then rename), so partial writes don't corrupt existing snapshots\n\n### Resulting Timeline\n\n```\nSignal → HTTP shutdown (max 5s) → concurrent(metricstore, archiver) → done\n                                   ↑ overall 10s deadline from signal\n```\n\nTypical: ~1s (HTTP) + ~5-8s (checkpoint) = **6-9s total**\nWorst case: capped at **~15s** (5s HTTP + 10s deadline)\n\n## Files to Modify\n\n- `cmd/cc-backend/server.go` — all changes here (add `\"sync\"` and `\"time\"` imports if needed)\n\n## Verification\n\n1. `go build ./cmd/cc-backend` — compiles\n2. Start with `./startDemo.sh`, send SIGTERM, measure exit time\n3. Restart and verify checkpoint data loads correctly (no data loss)\n","tool_use_id":"toolu_01TzDwgYR3LumG9XE8NV1rtp"}]},"uuid":"c26f1e2b-cc01-4632-9e37-c9b89da0d5b6","timestamp":"2026-03-24T06:16:05.687Z","toolUseResult":{"plan":"# Plan: Reduce Shutdown Time from ~40s to ~10s\n\n## Context\n\nShutdown has regressed from ~10s to ~40s. The root cause is the **fully sequential** shutdown in `server.go:Shutdown()`:\n\n1. HTTP server graceful shutdown — **30s timeout** (line 420)\n2. `metricstore.Shutdown()` — **no timeout**, writes binary snapshots for all hosts (line 437)\n3. `archiver.Shutdown(10s)` — **10s timeout** (line 441)\n\nWorst case sequential: 30 + unbounded + 10 = 40s+. Steps 2 and 3 are independent and can run concurrently. The HTTP timeout is also excessive.\n\nAdditionally, `Start()` (line 402-410) has a duplicate HTTP shutdown goroutine with its own 30s timeout that fires redundantly.\n\n## Changes\n\n### 1. Reduce HTTP server shutdown timeout: 30s -> 5s\n\n**File:** `cmd/cc-backend/server.go:420`\n\n5s is plenty for in-flight HTTP requests. Most complete in milliseconds.\n\n### 2. Remove duplicate shutdown goroutine in `Start()`\n\n**File:** `cmd/cc-backend/server.go:402-410`\n\nRemove the `go func() { <-ctx.Done(); s.server.Shutdown(...) }()` block. The `Shutdown()` method (called from the signal handler in main.go:415) is the primary path. The duplicate only fires later when `ctx` is cancelled by the deferred `cancel()` in `main()` — after everything is already shut down.\n\nAfter removal, `Start()` just calls `s.server.Serve(listener)` which returns `http.ErrServerClosed` when `Shutdown()` closes the server.\n\n### 3. Run metricstore and archiver shutdown concurrently with overall deadline\n\n**File:** `cmd/cc-backend/server.go:418-444`\n\nReplace sequential metricstore + archiver shutdown with concurrent execution, wrapped in an overall 10s deadline:\n\n```go\nfunc (s *Server) Shutdown(ctx context.Context) {\n    shutdownCtx, cancel := context.WithTimeout(ctx, 5*time.Second)\n    defer cancel()\n\n    nc := nats.GetClient()\n    if nc != nil {\n        nc.Close()\n    }\n\n    if err := s.server.Shutdown(shutdownCtx); err != nil {\n        cclog.Errorf(\"Server shutdown error: %v\", err)\n    }\n\n    // Run metricstore and archiver shutdown concurrently.\n    // They are independent: metricstore writes .bin snapshots,\n    // archiver flushes pending job archives.\n    done := make(chan struct{})\n    go func() {\n        defer close(done)\n        var wg sync.WaitGroup\n\n        ms := metricstore.GetMemoryStore()\n        if ms != nil {\n            wg.Add(1)\n            go func() {\n                defer wg.Done()\n                metricstore.Shutdown()\n            }()\n        }\n\n        wg.Add(1)\n        go func() {\n            defer wg.Done()\n            if err := archiver.Shutdown(10 * time.Second); err != nil {\n                cclog.Warnf(\"Archiver shutdown: %v\", err)\n            }\n        }()\n\n        wg.Wait()\n    }()\n\n    select {\n    case <-done:\n    case <-time.After(10 * time.Second):\n        cclog.Warn(\"Shutdown deadline exceeded, forcing exit\")\n    }\n}\n```\n\nData integrity is safe because:\n- WAL files on disk provide crash recovery — incomplete binary snapshots are handled by replaying WAL on next startup\n- `toCheckpointBinary` uses atomic rename (write `.tmp` then rename), so partial writes don't corrupt existing snapshots\n\n### Resulting Timeline\n\n```\nSignal → HTTP shutdown (max 5s) → concurrent(metricstore, archiver) → done\n                                   ↑ overall 10s deadline from signal\n```\n\nTypical: ~1s (HTTP) + ~5-8s (checkpoint) = **6-9s total**\nWorst case: capped at **~15s** (5s HTTP + 10s deadline)\n\n## Files to Modify\n\n- `cmd/cc-backend/server.go` — all changes here (add `\"sync\"` and `\"time\"` imports if needed)\n\n## Verification\n\n1. `go build ./cmd/cc-backend` — compiles\n2. Start with `./startDemo.sh`, send SIGTERM, measure exit time\n3. Restart and verify checkpoint data loads correctly (no data loss)\n","isAgent":false,"filePath":"/Users/jan/.claude/plans/whimsical-churning-platypus.md"},"sourceToolAssistantUUID":"d319ea42-5bde-4c45-ab8e-0229ed0978ca","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"type":"custom-title","customTitle":"reduce-shutdown-time","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf"}
{"type":"agent-name","agentName":"reduce-shutdown-time","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf"}
{"parentUuid":"c26f1e2b-cc01-4632-9e37-c9b89da0d5b6","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01HshAjpc3udnsVBzVRxyghV","type":"message","role":"assistant","content":[{"type":"text","text":"Let me implement the changes."}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":1358,"cache_read_input_tokens":45331,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":1358},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZMR4f9S8oh6xb4QZ67TJ","type":"assistant","uuid":"55499286-ad35-49cb-a729-dbbb117f8a29","timestamp":"2026-03-24T06:16:08.480Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"55499286-ad35-49cb-a729-dbbb117f8a29","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01HshAjpc3udnsVBzVRxyghV","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_014bbmV63ri3p8zqDAtZq5bU","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go","offset":1,"limit":20},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":1358,"cache_read_input_tokens":45331,"output_tokens":120,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":1358,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZMR4f9S8oh6xb4QZ67TJ","type":"assistant","uuid":"ec0e3b7e-7251-4a0e-9d31-0ada75edec58","timestamp":"2026-03-24T06:16:09.421Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"ec0e3b7e-7251-4a0e-9d31-0ada75edec58","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Read","command":"callback"},"parentToolUseID":"toolu_014bbmV63ri3p8zqDAtZq5bU","toolUseID":"toolu_014bbmV63ri3p8zqDAtZq5bU","timestamp":"2026-03-24T06:16:09.434Z","uuid":"9b410c78-7a01-45d3-ad30-ce1b5b1fc14a","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"ec0e3b7e-7251-4a0e-9d31-0ada75edec58","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_014bbmV63ri3p8zqDAtZq5bU","type":"tool_result","content":"     1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n     2→// All rights reserved. This file is part of cc-backend.\n     3→// Use of this source code is governed by a MIT-style\n     4→// license that can be found in the LICENSE file.\n     5→\n     6→// Package main provides the entry point for the ClusterCockpit backend server.\n     7→// This file contains HTTP server setup, routing configuration, and\n     8→// authentication middleware integration.\n     9→package main\n    10→\n    11→import (\n    12→\t\"context\"\n    13→\t\"crypto/tls\"\n    14→\t\"encoding/json\"\n    15→\t\"errors\"\n    16→\t\"fmt\"\n    17→\t\"net\"\n    18→\t\"net/http\"\n    19→\t\"os\"\n    20→\t\"strings\""}]},"uuid":"23c23177-8fae-47fd-bf59-6fa50f9252bc","timestamp":"2026-03-24T06:16:09.434Z","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\"","numLines":20,"startLine":1,"totalLines":445}},"sourceToolAssistantUUID":"ec0e3b7e-7251-4a0e-9d31-0ada75edec58","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"23c23177-8fae-47fd-bf59-6fa50f9252bc","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01BBAD5MriPHWTyXtBZgpqvv","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_018DLLfZ3oEeLYHSxhfZKTbG","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go","offset":20,"limit":30},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":351,"cache_read_input_tokens":46689,"output_tokens":113,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":351,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZMR4vpksGzufdBSQuSia","type":"assistant","uuid":"0f44238d-0b3d-472c-bfe6-1697bafb09e0","timestamp":"2026-03-24T06:16:12.654Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"0f44238d-0b3d-472c-bfe6-1697bafb09e0","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Read","command":"callback"},"parentToolUseID":"toolu_018DLLfZ3oEeLYHSxhfZKTbG","toolUseID":"toolu_018DLLfZ3oEeLYHSxhfZKTbG","timestamp":"2026-03-24T06:16:12.659Z","uuid":"b1a042c1-f5d1-490b-8419-9b2c8644bec1","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"0f44238d-0b3d-472c-bfe6-1697bafb09e0","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_018DLLfZ3oEeLYHSxhfZKTbG","type":"tool_result","content":"    20→\t\"strings\"\n    21→\t\"time\"\n    22→\n    23→\t\"github.com/99designs/gqlgen/graphql\"\n    24→\t\"github.com/99designs/gqlgen/graphql/handler\"\n    25→\t\"github.com/99designs/gqlgen/graphql/handler/transport\"\n    26→\t\"github.com/99designs/gqlgen/graphql/playground\"\n    27→\t\"github.com/ClusterCockpit/cc-backend/internal/api\"\n    28→\t\"github.com/ClusterCockpit/cc-backend/internal/archiver\"\n    29→\t\"github.com/ClusterCockpit/cc-backend/internal/auth\"\n    30→\t\"github.com/ClusterCockpit/cc-backend/internal/config\"\n    31→\t\"github.com/ClusterCockpit/cc-backend/internal/graph\"\n    32→\t\"github.com/ClusterCockpit/cc-backend/internal/graph/generated\"\n    33→\t\"github.com/ClusterCockpit/cc-backend/internal/routerConfig\"\n    34→\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n    35→\t\"github.com/ClusterCockpit/cc-backend/web\"\n    36→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n    37→\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n    38→\t\"github.com/ClusterCockpit/cc-lib/v2/runtime\"\n    39→\t\"github.com/go-chi/chi/v5\"\n    40→\t\"github.com/go-chi/chi/v5/middleware\"\n    41→\t\"github.com/go-chi/cors\"\n    42→\thttpSwagger \"github.com/swaggo/http-swagger\"\n    43→)\n    44→\n    45→var buildInfo web.Build\n    46→\n    47→// Environment variable names\n    48→const (\n    49→\tenvDebug = \"DEBUG\""}]},"uuid":"87f0e70e-fed2-49cc-82a7-49ae47d60cd5","timestamp":"2026-03-24T06:16:12.658Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go","content":"\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\"","numLines":30,"startLine":20,"totalLines":445}},"sourceToolAssistantUUID":"0f44238d-0b3d-472c-bfe6-1697bafb09e0","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"87f0e70e-fed2-49cc-82a7-49ae47d60cd5","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_0153hqdUwynD4h2EtZLc2YpA","type":"message","role":"assistant","content":[{"type":"text","text":"Good — `\"sync\"` is not in the imports yet, and `\"time\"` is already there. Now let me apply all three changes:\n\n**Change 1 & 2:** Remove duplicate shutdown goroutine in `Start()`:"}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":1009,"cache_read_input_tokens":46689,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":1009},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZMR5AjRSEm36FV1VQrSJ","type":"assistant","uuid":"c0082034-bb15-4cca-930b-32b7e245d33c","timestamp":"2026-03-24T06:16:16.824Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"c0082034-bb15-4cca-930b-32b7e245d33c","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_0153hqdUwynD4h2EtZLc2YpA","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01F4864X1Nd8JcMZwBtdf86B","name":"Edit","input":{"replace_all":false,"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go","old_string":"\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 {","new_string":"\tif err = s.server.Serve(listener); err != nil && err != http.ErrServerClosed {"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":1009,"cache_read_input_tokens":46689,"output_tokens":324,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":1009,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZMR5AjRSEm36FV1VQrSJ","type":"assistant","uuid":"aafff413-4331-4078-94b7-061a8ab48a0f","timestamp":"2026-03-24T06:16:18.880Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"type":"file-history-snapshot","messageId":"aafff413-4331-4078-94b7-061a8ab48a0f","snapshot":{"messageId":"31333ebb-5625-4704-898f-d051a650a9c0","trackedFileBackups":{"/Users/jan/.claude/plans/whimsical-churning-platypus.md":{"backupFileName":null,"version":1,"backupTime":"2026-03-24T06:14:34.491Z"},"cmd/cc-backend/server.go":{"backupFileName":"52a9e99169bfa641@v1","version":1,"backupTime":"2026-03-24T06:16:18.904Z"}},"timestamp":"2026-03-24T06:09:34.257Z"},"isSnapshotUpdate":true}
{"parentUuid":"aafff413-4331-4078-94b7-061a8ab48a0f","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Edit","command":"callback"},"parentToolUseID":"toolu_01F4864X1Nd8JcMZwBtdf86B","toolUseID":"toolu_01F4864X1Nd8JcMZwBtdf86B","timestamp":"2026-03-24T06:16:18.907Z","uuid":"224115c6-d039-45f7-b7b2-1052f9c1cef9","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"aafff413-4331-4078-94b7-061a8ab48a0f","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01F4864X1Nd8JcMZwBtdf86B","type":"tool_result","content":"The file /Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go has been updated successfully."}]},"uuid":"7a6725f3-a4cf-4f3a-9116-1a8f950ef72f","timestamp":"2026-03-24T06:16:18.907Z","toolUseResult":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go","oldString":"\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 {","newString":"\tif err = s.server.Serve(listener); err != nil && err != http.ErrServerClosed {","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 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\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\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":399,"oldLines":16,"newStart":399,"newLines":6,"lines":["     return fmt.Errorf(\"dropping privileges: %w\", err)","   }"," ","-  // Handle context cancellation for graceful shutdown","-  go func() {","-    <-ctx.Done()","-    shutdownCtx, cancel := context.WithTimeout(context.Background(), 30*time.Second)","-    defer cancel()","-    if err := s.server.Shutdown(shutdownCtx); err != nil {","-      cclog.Errorf(\"Server shutdown error: %v\", err)","-    }","-  }()","-","   if err = s.server.Serve(listener); err != nil && err != http.ErrServerClosed {","     return fmt.Errorf(\"server failed: %w\", err)","   }"]}],"userModified":false,"replaceAll":false},"sourceToolAssistantUUID":"aafff413-4331-4078-94b7-061a8ab48a0f","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"7a6725f3-a4cf-4f3a-9116-1a8f950ef72f","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01WAm1biWTdVN11jrpaBTLRG","type":"message","role":"assistant","content":[{"type":"text","text":"**Change 3:** Replace the `Shutdown()` method — reduce HTTP timeout to 5s, parallelize metricstore+archiver, add overall deadline:"}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":388,"cache_read_input_tokens":47698,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":388},"output_tokens":6,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZMR5dZTvk8FEGxAYQG7R","type":"assistant","uuid":"fc908c12-2d64-47e3-83d3-515609296c0c","timestamp":"2026-03-24T06:16:22.131Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"fc908c12-2d64-47e3-83d3-515609296c0c","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01WAm1biWTdVN11jrpaBTLRG","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_0129XLmNuGspn8jvnWjrk1WD","name":"Edit","input":{"replace_all":false,"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go","old_string":"func (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}","new_string":"func (s *Server) Shutdown(ctx context.Context) {\n\tshutdownCtx, cancel := context.WithTimeout(ctx, 5*time.Second)\n\tdefer cancel()\n\n\tnc := nats.GetClient()\n\tif nc != nil {\n\t\tnc.Close()\n\t}\n\n\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n\t}\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\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.Add(1)\n\t\t\tgo func() {\n\t\t\t\tdefer wg.Done()\n\t\t\t\tmetricstore.Shutdown()\n\t\t\t}()\n\t\t}\n\n\t\twg.Add(1)\n\t\tgo func() {\n\t\t\tdefer wg.Done()\n\t\t\tif err := archiver.Shutdown(10 * 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\tcase <-time.After(10 * time.Second):\n\t\tcclog.Warn(\"Shutdown deadline exceeded, forcing exit\")\n\t}\n}"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":388,"cache_read_input_tokens":47698,"output_tokens":765,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":388,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZMR5dZTvk8FEGxAYQG7R","type":"assistant","uuid":"d6456502-a44a-4e41-aca4-442d9bf2c3f9","timestamp":"2026-03-24T06:16:28.863Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"d6456502-a44a-4e41-aca4-442d9bf2c3f9","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Edit","command":"callback"},"parentToolUseID":"toolu_0129XLmNuGspn8jvnWjrk1WD","toolUseID":"toolu_0129XLmNuGspn8jvnWjrk1WD","timestamp":"2026-03-24T06:16:28.869Z","uuid":"eac5f0e2-42ec-4c0b-811e-d7c1e9660a51","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"d6456502-a44a-4e41-aca4-442d9bf2c3f9","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_0129XLmNuGspn8jvnWjrk1WD","type":"tool_result","content":"The file /Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go has been updated successfully."}]},"uuid":"b9e11d08-96c7-465e-8653-9b1650a33900","timestamp":"2026-03-24T06:16:28.869Z","toolUseResult":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go","oldString":"func (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}","newString":"func (s *Server) Shutdown(ctx context.Context) {\n\tshutdownCtx, cancel := context.WithTimeout(ctx, 5*time.Second)\n\tdefer cancel()\n\n\tnc := nats.GetClient()\n\tif nc != nil {\n\t\tnc.Close()\n\t}\n\n\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n\t}\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\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.Add(1)\n\t\t\tgo func() {\n\t\t\t\tdefer wg.Done()\n\t\t\t\tmetricstore.Shutdown()\n\t\t\t}()\n\t\t}\n\n\t\twg.Add(1)\n\t\tgo func() {\n\t\t\tdefer wg.Done()\n\t\t\tif err := archiver.Shutdown(10 * 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\tcase <-time.After(10 * time.Second):\n\t\tcclog.Warn(\"Shutdown deadline exceeded, forcing exit\")\n\t}\n}","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 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\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\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":406,"oldLines":8,"newStart":406,"newLines":7,"lines":[" }"," "," func (s *Server) Shutdown(ctx context.Context) {","-  // Create a shutdown context with timeout","-  shutdownCtx, cancel := context.WithTimeout(ctx, 30*time.Second)","+  shutdownCtx, cancel := context.WithTimeout(ctx, 5*time.Second)","   defer cancel()"," ","   nc := nats.GetClient()"]},{"oldStart":415,"oldLines":20,"newStart":414,"newLines":40,"lines":["     nc.Close()","   }"," ","-  // First shut down the server gracefully (waiting for all ongoing requests)","   if err := s.server.Shutdown(shutdownCtx); err != nil {","     cclog.Errorf(\"Server shutdown error: %v\", err)","   }"," ","-  // Archive all the metric store data","-  ms := metricstore.GetMemoryStore()","+  // Run metricstore and archiver shutdown concurrently.","+  // They are independent: metricstore writes .bin snapshots,","+  // archiver flushes pending job archives.","+  done := make(chan struct{})","+  go func() {","+    defer close(done)","+    var wg sync.WaitGroup"," ","-  if ms != nil {","-    metricstore.Shutdown()","-  }","+    if ms := metricstore.GetMemoryStore(); ms != nil {","+      wg.Add(1)","+      go func() {","+        defer wg.Done()","+        metricstore.Shutdown()","+      }()","+    }"," ","-  // Shutdown archiver with 10 second timeout for fast shutdown","-  if err := archiver.Shutdown(10 * time.Second); err != nil {","-    cclog.Warnf(\"Archiver shutdown: %v\", err)","+    wg.Add(1)","+    go func() {","+      defer wg.Done()","+      if err := archiver.Shutdown(10 * time.Second); err != nil {","+        cclog.Warnf(\"Archiver shutdown: %v\", err)","+      }","+    }()","+","+    wg.Wait()","+  }()","+","+  select {","+  case <-done:","+  case <-time.After(10 * time.Second):","+    cclog.Warn(\"Shutdown deadline exceeded, forcing exit\")","   }"," }"]}],"userModified":false,"replaceAll":false},"sourceToolAssistantUUID":"d6456502-a44a-4e41-aca4-442d9bf2c3f9","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"b9e11d08-96c7-465e-8653-9b1650a33900","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01NijAtaYZ6e9ccGDV1buuK9","type":"message","role":"assistant","content":[{"type":"text","text":"Need to add `\"sync\"` to imports:"}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":1003,"cache_read_input_tokens":48086,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":1003},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZMR6NbLQFZNHPoEcpYEb","type":"assistant","uuid":"9e3d2a33-8023-4613-806d-53e15c7426de","timestamp":"2026-03-24T06:16:32.123Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"9e3d2a33-8023-4613-806d-53e15c7426de","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01NijAtaYZ6e9ccGDV1buuK9","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01DW38GxqSq8REEdJER2X6tJ","name":"Edit","input":{"replace_all":false,"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go","old_string":"\t\"strings\"\n\t\"time\"","new_string":"\t\"strings\"\n\t\"sync\"\n\t\"time\""},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":1003,"cache_read_input_tokens":48086,"output_tokens":150,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":1003,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZMR6NbLQFZNHPoEcpYEb","type":"assistant","uuid":"9ad86e5e-f7b9-4225-a34d-c5cee0101abe","timestamp":"2026-03-24T06:16:32.884Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"9ad86e5e-f7b9-4225-a34d-c5cee0101abe","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Edit","command":"callback"},"parentToolUseID":"toolu_01DW38GxqSq8REEdJER2X6tJ","toolUseID":"toolu_01DW38GxqSq8REEdJER2X6tJ","timestamp":"2026-03-24T06:16:32.908Z","uuid":"ca2c9671-2c51-4d6e-8b6c-cfd9951d4cf2","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"9ad86e5e-f7b9-4225-a34d-c5cee0101abe","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01DW38GxqSq8REEdJER2X6tJ","type":"tool_result","content":"The file /Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go has been updated successfully."}]},"uuid":"61dbf6f0-6aba-4e18-98f4-9bbde0c42ef4","timestamp":"2026-03-24T06:16:32.907Z","toolUseResult":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go","oldString":"\t\"strings\"\n\t\"time\"","newString":"\t\"strings\"\n\t\"sync\"\n\t\"time\"","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 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\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\tshutdownCtx, cancel := context.WithTimeout(ctx, 5*time.Second)\n\tdefer cancel()\n\n\tnc := nats.GetClient()\n\tif nc != nil {\n\t\tnc.Close()\n\t}\n\n\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n\t}\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\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.Add(1)\n\t\t\tgo func() {\n\t\t\t\tdefer wg.Done()\n\t\t\t\tmetricstore.Shutdown()\n\t\t\t}()\n\t\t}\n\n\t\twg.Add(1)\n\t\tgo func() {\n\t\t\tdefer wg.Done()\n\t\t\tif err := archiver.Shutdown(10 * 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\tcase <-time.After(10 * time.Second):\n\t\tcclog.Warn(\"Shutdown deadline exceeded, forcing exit\")\n\t}\n}\n","structuredPatch":[{"oldStart":18,"oldLines":6,"newStart":18,"newLines":7,"lines":["   \"net/http\"","   \"os\"","   \"strings\"","+  \"sync\"","   \"time\""," ","   \"github.com/99designs/gqlgen/graphql\""]}],"userModified":false,"replaceAll":false},"sourceToolAssistantUUID":"9ad86e5e-f7b9-4225-a34d-c5cee0101abe","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"61dbf6f0-6aba-4e18-98f4-9bbde0c42ef4","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01626sEcnagPxyprDQLzZvUD","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01YXzKDjc2n3h8sVoFyNx9uL","name":"Bash","input":{"command":"go build ./cmd/cc-backend","description":"Build the Go backend"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":214,"cache_read_input_tokens":49089,"output_tokens":98,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":214,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZMR6fCDsdg4zmB4fqgRV","type":"assistant","uuid":"e775092c-3dbc-4242-a6cc-533c95d6d9fc","timestamp":"2026-03-24T06:16:38.563Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"e775092c-3dbc-4242-a6cc-533c95d6d9fc","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01YXzKDjc2n3h8sVoFyNx9uL","type":"tool_result","content":"(Bash completed with no output)","is_error":false}]},"uuid":"c30fb7bc-ccf0-43aa-9372-0134967610c1","timestamp":"2026-03-24T06:16:44.993Z","toolUseResult":{"stdout":"","stderr":"","interrupted":false,"isImage":false,"noOutputExpected":false},"sourceToolAssistantUUID":"e775092c-3dbc-4242-a6cc-533c95d6d9fc","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"c30fb7bc-ccf0-43aa-9372-0134967610c1","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_019rNsP2Z3abktJDq1dj4V7x","type":"message","role":"assistant","content":[{"type":"text","text":"Builds cleanly. The linter suggests using `wg.Go()` instead of manual `wg.Add(1)` + `go func()`. Let me apply that:"}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":200,"cache_read_input_tokens":49303,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":200},"output_tokens":2,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZMR7Z2fjYHhER4vKmUGa","type":"assistant","uuid":"ffe6a18f-4e34-4bf8-8625-f0133661869d","timestamp":"2026-03-24T06:16:49.012Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"ffe6a18f-4e34-4bf8-8625-f0133661869d","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_019rNsP2Z3abktJDq1dj4V7x","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01TBxMkzzuoDkAMkzW5AHMQv","name":"Edit","input":{"replace_all":false,"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go","old_string":"\t\tvar wg sync.WaitGroup\n\n\t\tif ms := metricstore.GetMemoryStore(); ms != nil {\n\t\t\twg.Add(1)\n\t\t\tgo func() {\n\t\t\t\tdefer wg.Done()\n\t\t\t\tmetricstore.Shutdown()\n\t\t\t}()\n\t\t}\n\n\t\twg.Add(1)\n\t\tgo func() {\n\t\t\tdefer wg.Done()\n\t\t\tif err := archiver.Shutdown(10 * 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()","new_string":"\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(10 * 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()"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":200,"cache_read_input_tokens":49303,"output_tokens":437,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":200,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZMR7Z2fjYHhER4vKmUGa","type":"assistant","uuid":"ad888f0c-081b-4131-9bb2-4ff9c9aebfa5","timestamp":"2026-03-24T06:16:51.608Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"ad888f0c-081b-4131-9bb2-4ff9c9aebfa5","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Edit","command":"callback"},"parentToolUseID":"toolu_01TBxMkzzuoDkAMkzW5AHMQv","toolUseID":"toolu_01TBxMkzzuoDkAMkzW5AHMQv","timestamp":"2026-03-24T06:16:51.622Z","uuid":"07a81628-acb9-4d8c-9736-31e7edb2be98","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"ad888f0c-081b-4131-9bb2-4ff9c9aebfa5","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01TBxMkzzuoDkAMkzW5AHMQv","type":"tool_result","content":"The file /Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go has been updated successfully."}]},"uuid":"4b4d6a98-ba3b-4ac6-b86a-bb85e27bd913","timestamp":"2026-03-24T06:16:51.622Z","toolUseResult":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go","oldString":"\t\tvar wg sync.WaitGroup\n\n\t\tif ms := metricstore.GetMemoryStore(); ms != nil {\n\t\t\twg.Add(1)\n\t\t\tgo func() {\n\t\t\t\tdefer wg.Done()\n\t\t\t\tmetricstore.Shutdown()\n\t\t\t}()\n\t\t}\n\n\t\twg.Add(1)\n\t\tgo func() {\n\t\t\tdefer wg.Done()\n\t\t\tif err := archiver.Shutdown(10 * 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()","newString":"\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(10 * 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()","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 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/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\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\tshutdownCtx, cancel := context.WithTimeout(ctx, 5*time.Second)\n\tdefer cancel()\n\n\tnc := nats.GetClient()\n\tif nc != nil {\n\t\tnc.Close()\n\t}\n\n\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n\t}\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\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.Add(1)\n\t\t\tgo func() {\n\t\t\t\tdefer wg.Done()\n\t\t\t\tmetricstore.Shutdown()\n\t\t\t}()\n\t\t}\n\n\t\twg.Add(1)\n\t\tgo func() {\n\t\t\tdefer wg.Done()\n\t\t\tif err := archiver.Shutdown(10 * 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\tcase <-time.After(10 * time.Second):\n\t\tcclog.Warn(\"Shutdown deadline exceeded, forcing exit\")\n\t}\n}\n","structuredPatch":[{"oldStart":428,"oldLines":20,"newStart":428,"newLines":16,"lines":["     var wg sync.WaitGroup"," ","     if ms := metricstore.GetMemoryStore(); ms != nil {","-      wg.Add(1)","-      go func() {","-        defer wg.Done()","+      wg.Go(func() {","         metricstore.Shutdown()","-      }()","+      })","     }"," ","-    wg.Add(1)","-    go func() {","-      defer wg.Done()","+    wg.Go(func() {","       if err := archiver.Shutdown(10 * time.Second); err != nil {","         cclog.Warnf(\"Archiver shutdown: %v\", err)","       }","-    }()","+    })"," ","     wg.Wait()","   }()"]}],"userModified":false,"replaceAll":false},"sourceToolAssistantUUID":"ad888f0c-081b-4131-9bb2-4ff9c9aebfa5","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"4b4d6a98-ba3b-4ac6-b86a-bb85e27bd913","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01A7FmNFqf99xemDveETwjDe","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01LCbc6QkEgjDdsEMydV5ENJ","name":"Bash","input":{"command":"go build ./cmd/cc-backend","description":"Build the Go backend"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":482,"cache_read_input_tokens":49503,"output_tokens":79,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":482,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZMR83SThrj7EHXKeckcM","type":"assistant","uuid":"e25e3885-4a2a-4d25-947d-56cc0d69921b","timestamp":"2026-03-24T06:16:54.325Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"e25e3885-4a2a-4d25-947d-56cc0d69921b","isSidechain":false,"promptId":"09f671ce-69f9-4bc6-be0c-fed7ef6fec43","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01LCbc6QkEgjDdsEMydV5ENJ","type":"tool_result","content":"(Bash completed with no output)","is_error":false}]},"uuid":"5940fbf4-6cf5-4bd7-a8a6-208887b75e4e","timestamp":"2026-03-24T06:16:59.342Z","toolUseResult":{"stdout":"","stderr":"","interrupted":false,"isImage":false,"noOutputExpected":false},"sourceToolAssistantUUID":"e25e3885-4a2a-4d25-947d-56cc0d69921b","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"5940fbf4-6cf5-4bd7-a8a6-208887b75e4e","isSidechain":false,"message":{"model":"claude-opus-4-6","id":"msg_01UuptsX7qmMk1s2crEoXFDz","type":"message","role":"assistant","content":[{"type":"text","text":"Builds clean, no lint warnings. Here's what changed in `cmd/cc-backend/server.go`:\n\n1. **Removed duplicate shutdown goroutine** in `Start()` (was redundant — `Shutdown()` is the primary path)\n2. **HTTP server timeout reduced** from 30s to 5s\n3. **Metricstore + archiver now run concurrently** instead of sequentially\n4. **10s overall deadline** caps total shutdown time — safe because WAL replay on restart handles incomplete snapshots\n\nExpected shutdown time: **6-9s typical**, hard-capped at **~15s** (5s HTTP + 10s deadline), down from 40s."}],"stop_reason":"end_turn","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":97,"cache_read_input_tokens":49985,"output_tokens":160,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":97,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZMR8cHAEVT1ADdKgptta","type":"assistant","uuid":"a969d007-8c06-4d83-85ac-4c194490bfee","timestamp":"2026-03-24T06:17:04.862Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"a969d007-8c06-4d83-85ac-4c194490bfee","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"Stop","hookName":"Stop","command":"entire hooks claude-code stop"},"parentToolUseID":"49ed86a8-5622-48f3-a6c2-2120211c05d3","toolUseID":"49ed86a8-5622-48f3-a6c2-2120211c05d3","timestamp":"2026-03-24T06:17:04.880Z","uuid":"26c8657d-7eb3-451e-8fc4-53d36208880b","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"26c8657d-7eb3-451e-8fc4-53d36208880b","isSidechain":false,"type":"system","subtype":"stop_hook_summary","hookCount":1,"hookInfos":[{"command":"entire hooks claude-code stop","durationMs":649}],"hookErrors":[],"preventedContinuation":false,"stopReason":"","hasOutput":false,"level":"suggestion","timestamp":"2026-03-24T06:17:05.529Z","uuid":"8765d105-840d-4f2b-a2a8-23f16090bb6c","toolUseID":"49ed86a8-5622-48f3-a6c2-2120211c05d3","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}
{"parentUuid":"8765d105-840d-4f2b-a2a8-23f16090bb6c","isSidechain":false,"type":"system","subtype":"turn_duration","durationMs":368794,"timestamp":"2026-03-24T06:17:05.530Z","uuid":"cdc88d7a-3aca-4b0a-94b8-4c4511a35f48","isMeta":false,"userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-backend","sessionId":"b9d4da02-9eec-4dab-88b8-3c34e54894cf","version":"2.1.81","gitBranch":"hotfix","slug":"whimsical-churning-platypus"}