{"record":{"id":"de53404933eddaa4","repo":"davila7/claude-code-templates","slug":"failed-to-update-states","errorCode":null,"errorMessage":"Failed to update states","messagePattern":"Failed to update states","errorType":"http","errorClass":null,"httpStatus":500,"severity":"error","filePath":"cli-tool/src/analytics.js","lineNumber":1073,"sourceCode":"\n        // Slice for response only — do not mutate this.data.conversations\n        const responseConversations = this.data.conversations\n          ? this.data.conversations\n              .slice()\n              .sort((a, b) => new Date(b.lastModified) - new Date(a.lastModified))\n              .slice(0, 150)\n          : [];\n\n        const dataWithTimestamp = {\n          conversations: responseConversations,\n          summary: this.data.summary,\n          timestamp: new Date().toISOString(),\n          lastUpdate: new Date().toLocaleString(),\n        };\n        res.json(dataWithTimestamp);\n      } catch (error) {\n        console.error('Fast update error:', error);\n        res.status(500).json({ error: 'Failed to update states' });\n      }\n    });\n\n    // Remove duplicate endpoint - this conflicts with the correct one above\n\n    // System health endpoint\n    this.app.get('/api/system/health', (req, res) => {\n      try {\n        const stats = this.performanceMonitor.getStats();\n        const systemHealth = {\n          status: 'healthy',\n          uptime: stats.uptime,\n          memory: stats.memory,\n          requests: stats.requests,\n          cache: {\n            ...stats.cache,\n            dataCache: this.dataCache.getStats()\n          },","sourceCodeStart":1055,"sourceCodeEnd":1091,"githubUrl":"https://github.com/davila7/claude-code-templates/blob/a0851ed10c7c60463dac8cfaaca124cf32d5804d/cli-tool/src/analytics.js#L1055-L1091","documentation":"Generic 500 from the POST fast-update endpoint of the local analytics Express server. The handler computes updated analytics state and any thrown error (file I/O on ~/.claude/projects, JSON parse of conversation files, cache issues) escapes to the catch, which discards the real error and returns 'Failed to update states'.","triggerScenarios":"POST /api/update-states (fast update route) while a conversation JSONL file is corrupted, a tracked file is locked/removed mid-scan, or the data cache holds a stale/invalid entry.","commonSituations":"Running the analytics dashboard while Claude Code is actively writing session files; very large projects dir causing timeouts; partial writes after a crash.","solutions":["Check the server console — the handler logs 'Fast update error:' with the underlying error before responding 500","Retry the request once the Claude Code session that owns the files is idle","Delete stale cache (POST /api/clear-cache?type=all) and retry","Inspect ~/.claude/projects for truncated/corrupt .jsonl files and remove or fix them"],"exampleFix":"// before\nres.status(500).json({ error: 'Failed to update states' });\n// after (expose the cause for debugging)\nres.status(500).json({ error: 'Failed to update states', message: error.message });","handlingStrategy":"retry","validationCode":"const health = await fetch(`${base}/api/system-health`).then(r => r.json());\nif (health.status !== 'ok') await new Promise(r => setTimeout(r, 2000));","typeGuard":null,"tryCatchPattern":"try { const r = await fetch(base + '/api/update-states', { method: 'POST' }); if (r.status === 500) { await clearCachesAndRetry(); } } catch (e) { console.error('update failed, will retry', e.message); }","preventionTips":["Poll a readiness/health endpoint before triggering updates","Avoid running updates while Claude Code sessions are actively writing","Clear conversation caches after abrupt shutdowns"],"tags":["analytics","express","http-500","file-io"],"backgroundTag":"internal-server-error-handler","analyzedSha":"a0851ed10c7c60463dac8cfaaca124cf32d5804d","analyzedAt":"2026-08-28T14:11:56.058Z","schemaVersion":2},"datasetVersion":"2026-08-28T16:17:29.566Z"}