exa-advanced-troubleshooting

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English

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Chinese

Exa Advanced Troubleshooting

Exa高级故障排查

Overview

概述

Deep debugging techniques for complex Exa issues that resist standard troubleshooting.

针对标准故障排查无法解决的复杂Exa问题的深度调试技术。

Prerequisites

前提条件

Access to production logs and metrics
kubectl access to clusters
Network capture tools available
Understanding of distributed tracing

可访问生产环境日志和指标
拥有集群的kubectl访问权限
可使用网络抓包工具
了解分布式追踪

Evidence Collection Framework

证据收集框架

Comprehensive Debug Bundle

全面调试包

bash

#!/bin/bash

bash

#!/bin/bash

advanced-exa-debug.sh

BUNDLE="exa-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=exa-integration --since=1h > "$BUNDLE/logs/pods.log" journalctl -u exa-service --since "1 hour ago" > "$BUNDLE/logs/system.log"

2. Metrics dump

curl -s localhost:9090/api/v1/query?query=exa_requests_total > "$BUNDLE/metrics/requests.json" curl -s localhost:9090/api/v1/query?query=exa_errors_total > "$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=exa > "$BUNDLE/traces/jaeger.json"

5. Configuration state

kubectl get cm exa-config -o yaml > "$BUNDLE/config/configmap.yaml" kubectl get secret exa-secrets -o yaml > "$BUNDLE/config/secrets-redacted.yaml"

tar -czf "$BUNDLE.tar.gz" "$BUNDLE" echo "Advanced debug bundle: $BUNDLE.tar.gz"

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kubectl get cm exa-config -o yaml > "$BUNDLE/config/configmap.yaml" kubectl get secret exa-secrets -o yaml > "$BUNDLE/config/secrets-redacted.yaml"

tar -czf "$BUNDLE.tar.gz" "$BUNDLE" echo "Advanced debug bundle: $BUNDLE.tar.gz"

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Systematic Isolation

系统性隔离

Layer-by-Layer Testing

逐层测试

typescript

// Test each layer independently
async function diagnoseExaIssue(): Promise<DiagnosisReport> {
  const results: DiagnosisResult[] = [];

  // Layer 1: Network connectivity
  results.push(await testNetworkConnectivity());

  // Layer 2: DNS resolution
  results.push(await testDNSResolution('api.exa.com'));

  // Layer 3: TLS handshake
  results.push(await testTLSHandshake('api.exa.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) };
}

typescript

// Test each layer independently
async function diagnoseExaIssue(): Promise<DiagnosisReport> {
  const results: DiagnosisResult[] = [];

  // Layer 1: Network connectivity
  results.push(await testNetworkConnectivity());

  // Layer 2: DNS resolution
  results.push(await testDNSResolution('api.exa.com'));

  // Layer 3: TLS handshake
  results.push(await testTLSHandshake('api.exa.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

最小化复现

typescript

// Strip down to absolute minimum
async function minimalRepro(): Promise<void> {
  // 1. Fresh client, no customization
  const client = new ExaClient({
    apiKey: process.env.EXA_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,
    });
  }
}

typescript

// Strip down to absolute minimum
async function minimalRepro(): Promise<void> {
  // 1. Fresh client, no customization
  const client = new ExaClient({
    apiKey: process.env.EXA_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

时序分析

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;
  }
}

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

内存与资源分析

typescript

// Detect memory leaks in Exa 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 exa integration');
    }
  }
}, 60000);

typescript

// Detect memory leaks in Exa 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 exa integration');
    }
  }
}, 60000);

Race Condition Detection

竞态条件检测

typescript

// Detect concurrent access issues
class ExaConcurrencyChecker {
  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);
    }
  }
}

typescript

// Detect concurrent access issues
class ExaConcurrencyChecker {
  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

技术支持升级模板

markdown

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markdown

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Exa Support Escalation

Severity: P[1-4] Request ID: [from error response] Timestamp: [ISO 8601]

Issue Summary

[One paragraph description]

Steps to Reproduce

[Step 1]
[Step 2]

[Step 1]
[Step 2]

Expected vs Actual

Expected: [behavior]
Actual: [behavior]

Expected: [behavior]
Actual: [behavior]

Evidence Attached

Debug bundle (exa-advanced-debug-*.tar.gz)
Minimal reproduction code
Timing analysis
Network capture (if relevant)

Debug bundle (exa-advanced-debug-*.tar.gz)
Minimal reproduction code
Timing analysis
Network capture (if relevant)

Workarounds Attempted

[Workaround 1] - Result: [outcome]
[Workaround 2] - Result: [outcome]

undefined

[Workaround 1] - Result: [outcome]
[Workaround 2] - Result: [outcome]

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Instructions

操作步骤

Step 1: Collect Evidence Bundle

步骤1：收集证据包

Run the comprehensive debug script to gather all relevant data.

运行全面调试脚本以收集所有相关数据。

Step 2: Systematic Isolation

步骤2：系统性隔离

Test each layer independently to identify the failure point.

逐层独立测试以确定故障点。

Step 3: Create Minimal Reproduction

步骤3：创建最小化复现案例

Strip down to the simplest failing case.

简化至最基础的失败场景。

Step 4: Escalate with Evidence

步骤4：提交带证据的升级请求

Use the support template with all collected evidence.

使用支持模板提交所有收集到的证据。

Output

输出结果

Comprehensive debug bundle collected
Failure layer identified
Minimal reproduction created
Support escalation submitted

已收集全面调试包
已确定故障层级
已创建最小化复现案例
已提交技术支持升级请求

Error Handling

错误处理

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

问题	原因	解决方案
无法复现	竞态条件	添加时序分析
间歇性故障	与时序相关	增大样本量
无有效日志	缺少埋点	添加调试日志
内存增长	资源泄漏	使用堆分析

Examples

示例

Quick Layer Test

快速层级测试

bash

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bash

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Test each layer in sequence

curl -v https://api.exa.com/health 2>&1 | grep -E "(Connected|TLS|HTTP)"

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curl -v https://api.exa.com/health 2>&1 | grep -E "(Connected|TLS|HTTP)"

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Resources

参考资源

Next Steps

后续步骤

For load testing, see

exa-load-scale

如需进行负载测试，请查看

exa-load-scale

。