replit-advanced-troubleshooting

# Replit Advanced Troubleshooting ## Overview Deep debugging techniques for complex Replit issues that resist standard troubleshooting. ## Prerequisites - Access to production logs and metrics - kubectl access to clusters - Network capture tools available - Understanding of distributed tracing ## Evidence Collection Framework ### Comprehensive Debug Bundle ```bash #!/bin/bash # advanced-replit-debug.sh BUNDLE="replit-advanced-debug-$(date +%Y%m%d-%H%M%S)" mkdir -p "$BUNDLE"/{logs,metrics,network,config,traces} # 1. Extended logs (1 hour window) kubectl logs -l app=replit-integration --since=1h > "$BUNDLE/logs/pods.log" journalctl -u replit-service --since "1 hour ago" > "$BUNDLE/logs/system.log" # 2. Metrics dump curl -s localhost:9090/api/v1/query?query=replit_requests_total > "$BUNDLE/metrics/requests.json" curl -s localhost:9090/api/v1/query?query=replit_errors_total > "$BUNDLE/metrics/errors.json" # 3. Network capture (30 seconds) timeout 30 tcpdump -i any port 443 -w "$BUNDLE/network/capture.pcap" & # 4. Distributed traces curl -s localhost:16686/api/traces?service=replit > "$BUNDLE/traces/jaeger.json" # 5. Configuration state kubectl get cm replit-config -o yaml > "$BUNDLE/config/configmap.yaml" kubectl get secret replit-secrets -o yaml > "$BUNDLE/config/secrets-redacted.yaml" tar -czf "$BUNDLE.tar.gz" "$BUNDLE" echo "Advanced debug bundle: $BUNDLE.tar.gz" ``` ## Systematic Isolation ### Layer-by-Layer Testing ```typescript // Test each layer independently async function diagnoseReplitIssue(): Promise<DiagnosisReport> { const results: DiagnosisResult[] = []; // Layer 1: Network connectivity results.push(await testNetworkConnectivity()); // Layer 2: DNS resolution results.push(await testDNSResolution('api.replit.com')); // Layer 3: TLS handshake results.push(await testTLSHandshake('api.replit.com')); // Layer 4: Authentication results.push(await testAuthentication()); // Layer 5: API response results.push(await testAPIResponse()); // Layer 6: Response parsing results.push(await testResponseParsing()); return { results, firstFailure: results.find(r => !r.success) }; } ``` ### Minimal Reproduction ```typescript // Strip down to absolute minimum async function minimalRepro(): Promise<void> { // 1. Fresh client, no customization const client = new ReplitClient({ apiKey: process.env.REPLIT_API_KEY!, }); // 2. Simplest possible call try { const result = await client.ping(); console.log('Ping successful:', result); } catch (error) { console.error('Ping failed:', { message: error.message, code: error.code, stack: error.stack, }); } } ``` ## Timing Analysis ```typescript class TimingAnalyzer { private timings: Map<string, number[]> = new Map(); async measure<T>(label: string, fn: () => Promise<T>): Promise<T> { const start = performance.now(); try { return await fn(); } finally { const duration = performance.now() - start; const existing = this.timings.get(label) || []; existing.push(duration); this.timings.set(label, existing); } } report(): TimingReport { const report: TimingReport = {}; for (const [label, times] of this.timings) { report[label] = { count: times.length, min: Math.min(...times), max: Math.max(...times), avg: times.reduce((a, b) => a + b, 0) / times.length, p95: this.percentile(times, 95), }; } return report; } } ``` ## Memory and Resource Analysis ```typescript // Detect memory leaks in Replit client usage const heapUsed: number[] = []; setInterval(() => { const usage = process.memoryUsage(); heapUsed.push(usage.heapUsed); // Alert on sustained growth if (heapUsed.length > 60) { // 1 hour at 1/min const trend = heapUsed[59] - heapUsed[0]; if (trend > 100 * 1024 * 1024) { // 100MB growth console.warn('Potential memory leak in replit integration'); } } }, 60000); ``` ## Race Condition Detection ```typescript // Detect concurrent access issues class ReplitConcurrencyChecker { private inProgress: Set<string> = new Set(); async execute<T>(key: string, fn: () => Promise<T>): Promise<T> { if (this.inProgress.has(key)) { console.warn(`Concurrent access detected for ${key}`); } this.inProgress.add(key); try { return await fn(); } finally { this.inProgress.delete(key); } } } ``` ## Support Escalation Template ```markdown ## Replit Support Escalation **Severity:** P[1-4] **Request ID:** [from error response] **Timestamp:** [ISO 8601] ### Issue Summary [One paragraph description] ### Steps to Reproduce 1. [Step 1] 2. [Step 2] ### Expected vs Actual - Expected: [behavior] - Actual: [behavior] ### Evidence Attached - [ ] Debug bundle (replit-advanced-debug-*.tar.gz) - [ ] Minimal reproduction code - [ ] Timing analysis - [ ] Network capture (if relevant) ### Workarounds Attempted 1. [Workaround 1] - Result: [outcome] 2. [Workaround 2] - Result: [outcome] ``` ## Instructions ### Step 1: Collect Evidence Bundle Run the comprehensive debug script to gather all relevant data. ### Step 2: Systematic Isolation Test each layer independently to identify the failure point. ### Step 3: Create Minimal Reproduction Strip down to the simplest failing case. ### Step 4: Escalate with Evidence Use the support template with all collected evidence. ## Output - Comprehensive debug bundle collected - Failure layer identified - Minimal reproduction created - Support escalation submitted ## Error Handling | Issue | Cause | Solution | |-------|-------|----------| | Can't reproduce | Race condition | Add timing analysis | | Intermittent failure | Timing-dependent | Increase sample size | | No useful logs | Missing instrumentation | Add debug logging | | Memory growth | Resource leak | Use heap profiling | ## Examples ### Quick Layer Test ```bash # Test each layer in sequence curl -v https://api.replit.com/health 2>&1 | grep -E "(Connected|TLS|HTTP)" ``` ## Resources - [Replit Support Portal](https://support.replit.com) - [Replit Status Page](https://status.replit.com) ## Next Steps For load testing, see `replit-load-scale`.