Troubleshooting Scenarios

This guide provides step-by-step solutions for common issues you may encounter when using DeepWikiOpen.

1. API Key Validation Issues

Scenario: “Invalid API key” error when starting the application

Symptoms

Error: Invalid API key provided
Status: 401 Unauthorized

Debugging Steps

Verify API key format

# Check if API key is properly set
echo $ANTHROPIC_API_KEY

# Should start with "sk-ant-api03-"

Check environment file

# Ensure .env file exists
ls -la .env

# Verify contents
cat .env | grep ANTHROPIC_API_KEY

Test API key directly

curl https://api.anthropic.com/v1/messages \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "content-type: application/json" \
  -d '{
    "model": "claude-3-5-sonnet-20241022",
    "max_tokens": 10,
    "messages": [{"role": "user", "content": "Hello"}]
  }'

Solutions

# Solution 1: Export API key correctly
export ANTHROPIC_API_KEY="sk-ant-api03-your-actual-key"

# Solution 2: Fix .env file formatting
echo 'ANTHROPIC_API_KEY="sk-ant-api03-your-actual-key"' > .env

# Solution 3: Use Docker with proper env passing
docker run -e ANTHROPIC_API_KEY="$ANTHROPIC_API_KEY" \
  deepwikiopen/app:latest

# Solution 4: Check for special characters
# Ensure no trailing spaces or newlines
ANTHROPIC_API_KEY=$(echo "$ANTHROPIC_API_KEY" | tr -d ' \n')

2. Connection Problems (CORS, Network)

Scenario: CORS errors when accessing the API

Symptoms

Access to XMLHttpRequest at 'http://localhost:8000/api' from origin 
'http://localhost:3000' has been blocked by CORS policy

Debugging Steps

Check server CORS configuration

# backend/main.py
from fastapi.middleware.cors import CORSMiddleware

app.add_middleware(
    CORSMiddleware,
    allow_origins=["http://localhost:3000"],  # Add your frontend URL
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

Verify network connectivity

# Test backend is running
curl http://localhost:8000/health

# Check ports are not blocked
netstat -an | grep -E "8000|3000"

Inspect browser network tab
- Open Developer Tools → Network tab
- Look for preflight OPTIONS requests
- Check response headers for CORS headers

Solutions

// Solution 1: Frontend proxy configuration
// frontend/package.json
{
  "proxy": "http://localhost:8000"
}

// Solution 2: Use environment-specific API URLs
const API_BASE = process.env.REACT_APP_API_URL || 'http://localhost:8000';

// Solution 3: nginx reverse proxy
// nginx.conf
server {
    location /api {
        proxy_pass http://backend:8000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
    }
}

3. Large Repository Handling

Scenario: Application crashes when analyzing large repositories

Symptoms

Error: JavaScript heap out of memory
FATAL ERROR: Reached heap limit Allocation failed

Debugging Steps

Monitor memory usage

# Check current memory usage
docker stats

# Monitor Node.js memory
node --max-old-space-size=4096 server.js

Profile repository size

# Check repository size
du -sh /path/to/repo

# Count files
find /path/to/repo -type f | wc -l

Solutions

// Solution 1: Implement streaming file processing
const processLargeRepo = async (repoPath) => {
  const stream = fs.createReadStream(repoPath);
  const chunks = [];
  
  for await (const chunk of stream) {
    // Process in chunks
    await processChunk(chunk);
    
    // Clear memory periodically
    if (chunks.length > 1000) {
      await flushToDatabase(chunks);
      chunks.length = 0;
    }
  }
};

// Solution 2: Use worker threads
const { Worker } = require('worker_threads');

const analyzeInWorker = (filePath) => {
  return new Promise((resolve, reject) => {
    const worker = new Worker('./analyzer.js', {
      workerData: { filePath }
    });
    
    worker.on('message', resolve);
    worker.on('error', reject);
  });
};

// Solution 3: Docker memory limits
// docker-compose.yml
services:
  app:
    mem_limit: 4g
    memswap_limit: 4g

4. Memory and Performance Issues

Scenario: Slow response times and high memory usage

Debugging Steps

Profile application performance

# Node.js profiling
node --inspect server.js

# Python profiling
python -m cProfile -o profile.stats app.py

Monitor resource usage

# Real-time monitoring
htop
iotop

# Docker resource usage
docker stats --format "table {{.Container}}\t{{.CPUPerc}}\t{{.MemUsage}}"

Solutions

# Solution 1: Implement caching
from functools import lru_cache
import redis

cache = redis.Redis(host='localhost', port=6379)

@lru_cache(maxsize=1000)
def expensive_operation(repo_path):
    # Check cache first
    cached = cache.get(f"analysis:{repo_path}")
    if cached:
        return json.loads(cached)
    
    result = perform_analysis(repo_path)
    cache.set(f"analysis:{repo_path}", json.dumps(result), ex=3600)
    return result

# Solution 2: Batch processing
async def batch_analyze(files, batch_size=100):
    for i in range(0, len(files), batch_size):
        batch = files[i:i + batch_size]
        await asyncio.gather(*[analyze_file(f) for f in batch])
        
        # Allow garbage collection
        gc.collect()

5. Docker Container Problems

Scenario: Container fails to start or crashes immediately

Symptoms

docker: Error response from daemon: OCI runtime create failed
Container exited with code 137 (Out of Memory)

Debugging Steps

Check container logs

docker logs deepwikiopen-app
docker logs --tail 50 -f deepwikiopen-app

Inspect container

docker inspect deepwikiopen-app
docker exec -it deepwikiopen-app /bin/sh

Solutions

# Solution 1: Rebuild with proper base image
FROM node:18-alpine AS build
WORKDIR /app
COPY package*.json ./
RUN npm ci --only=production

# Solution 2: Fix permission issues
RUN addgroup -g 1001 -S nodejs
RUN adduser -S nodejs -u 1001
USER nodejs

# Solution 3: Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=40s \
  CMD node healthcheck.js || exit 1

6. Model Selection Errors

Scenario: “Model not found” or incorrect model responses

Symptoms

Error: Model 'claude-3-opus' not found
Available models: ['claude-3-5-sonnet-20241022', 'claude-3-5-haiku-20241022']

Debugging Steps

List available models

import anthropic

client = anthropic.Anthropic()
# Check model availability based on your API tier

Verify model configuration

// config/models.js
export const AVAILABLE_MODELS = {
  'claude-3-5-sonnet-20241022': {
    maxTokens: 8192,
    contextWindow: 200000
  },
  'claude-3-5-haiku-20241022': {
    maxTokens: 8192,
    contextWindow: 200000
  }
};

Solutions

// Solution 1: Implement model fallback
const getModel = (preferred) => {
  const fallbackChain = [
    'claude-3-5-sonnet-20241022',
    'claude-3-5-haiku-20241022',
    'claude-3-haiku-20240307'
  ];
  
  if (AVAILABLE_MODELS[preferred]) {
    return preferred;
  }
  
  return fallbackChain.find(model => AVAILABLE_MODELS[model]);
};

// Solution 2: Dynamic model selection
const selectOptimalModel = (contextLength, speed = 'balanced') => {
  if (speed === 'fast' || contextLength < 10000) {
    return 'claude-3-5-haiku-20241022';
  }
  return 'claude-3-5-sonnet-20241022';
};

7. Private Repository Access Issues

Scenario: Cannot access private GitHub repositories

Symptoms

Error: Repository not found or you don't have access
Status: 404

Debugging Steps

Verify GitHub token

# Test token permissions
curl -H "Authorization: token $GITHUB_TOKEN" \
  https://api.github.com/user/repos

Check token scopes

curl -H "Authorization: token $GITHUB_TOKEN" \
  -I https://api.github.com/user
# Look for X-OAuth-Scopes header

Solutions

# Solution 1: Create token with correct scopes
# Go to GitHub Settings → Developer settings → Personal access tokens
# Required scopes: repo, read:org (for private repos)

# Solution 2: Use GitHub App authentication
# github-app-auth.js
const { createAppAuth } = require("@octokit/auth-app");

const auth = createAppAuth({
  appId: process.env.GITHUB_APP_ID,
  privateKey: process.env.GITHUB_PRIVATE_KEY,
  installationId: process.env.GITHUB_INSTALLATION_ID,
});

# Solution 3: SSH key authentication for cloning
ssh-keygen -t ed25519 -C "deepwikiopen@example.com"
# Add to GitHub account settings

8. WebSocket Connection Failures

Scenario: Real-time updates not working, WebSocket disconnects

Symptoms

WebSocket connection to 'ws://localhost:8000/ws' failed
Error: Connection closed before established

Debugging Steps

Test WebSocket endpoint

// Test WebSocket connection
const ws = new WebSocket('ws://localhost:8000/ws');
ws.onopen = () => console.log('Connected');
ws.onerror = (error) => console.error('Error:', error);
ws.onclose = (event) => console.log('Closed:', event.code, event.reason);

Check server WebSocket implementation

# Ensure WebSocket endpoint exists
@app.websocket("/ws")
async def websocket_endpoint(websocket: WebSocket):
    await websocket.accept()
    # Handle connection

Solutions

// Solution 1: Implement reconnection logic
class ReconnectingWebSocket {
  constructor(url, options = {}) {
    this.url = url;
    this.reconnectInterval = options.reconnectInterval || 1000;
    this.maxReconnectInterval = options.maxReconnectInterval || 30000;
    this.reconnectDecay = options.reconnectDecay || 1.5;
    this.reconnectAttempts = 0;
    this.connect();
  }
  
  connect() {
    this.ws = new WebSocket(this.url);
    
    this.ws.onclose = () => {
      this.reconnect();
    };
    
    this.ws.onerror = (error) => {
      console.error('WebSocket error:', error);
      this.ws.close();
    };
  }
  
  reconnect() {
    this.reconnectAttempts++;
    const timeout = Math.min(
      this.reconnectInterval * Math.pow(this.reconnectDecay, this.reconnectAttempts),
      this.maxReconnectInterval
    );
    
    setTimeout(() => this.connect(), timeout);
  }
}

// Solution 2: Use Socket.IO for better reliability
const io = require('socket.io')(server, {
  cors: {
    origin: "http://localhost:3000",
    methods: ["GET", "POST"]
  },
  reconnection: true,
  reconnectionAttempts: 5,
  reconnectionDelay: 1000,
});

9. Rate Limiting Scenarios

Scenario: API rate limit exceeded errors

Symptoms

Error: Rate limit exceeded. Please retry after 30 seconds.
Status: 429 Too Many Requests

Debugging Steps

Monitor rate limit headers

// Check response headers
response.headers.get('X-RateLimit-Limit')
response.headers.get('X-RateLimit-Remaining')
response.headers.get('X-RateLimit-Reset')

Solutions

// Solution 1: Implement rate limit handling
class RateLimiter {
  constructor(maxRequests = 50, windowMs = 60000) {
    this.maxRequests = maxRequests;
    this.windowMs = windowMs;
    this.requests = [];
  }
  
  async acquire() {
    const now = Date.now();
    this.requests = this.requests.filter(time => now - time < this.windowMs);
    
    if (this.requests.length >= this.maxRequests) {
      const oldestRequest = this.requests[0];
      const waitTime = this.windowMs - (now - oldestRequest);
      await new Promise(resolve => setTimeout(resolve, waitTime));
      return this.acquire();
    }
    
    this.requests.push(now);
  }
}

// Solution 2: Implement exponential backoff
async function makeRequestWithRetry(fn, maxRetries = 3) {
  for (let i = 0; i < maxRetries; i++) {
    try {
      return await fn();
    } catch (error) {
      if (error.status === 429 && i < maxRetries - 1) {
        const delay = Math.pow(2, i) * 1000;
        await new Promise(resolve => setTimeout(resolve, delay));
        continue;
      }
      throw error;
    }
  }
}

// Solution 3: Queue requests
const pQueue = require('p-queue').default;
const queue = new pQueue({ 
  concurrency: 2, 
  interval: 1000, 
  intervalCap: 10 
});

10. Common Error Messages and Solutions

Error: “Context length exceeded”

Solution

// Implement context window management
const truncateContext = (messages, maxTokens = 150000) => {
  let totalTokens = 0;
  const truncated = [];
  
  for (let i = messages.length - 1; i >= 0; i--) {
    const tokens = estimateTokens(messages[i].content);
    if (totalTokens + tokens > maxTokens) break;
    totalTokens += tokens;
    truncated.unshift(messages[i]);
  }
  
  return truncated;
};

Error: “WebContainer initialization failed”

Solution

// Ensure proper WebContainer setup
import { WebContainer } from '@webcontainer/api';

let webcontainerInstance;

async function initWebContainer() {
  try {
    webcontainerInstance = await WebContainer.boot();
    console.log('WebContainer initialized');
  } catch (error) {
    console.error('Failed to initialize WebContainer:', error);
    // Fallback to server-side execution
    return initServerSideContainer();
  }
}

Error: “Database connection timeout”

Solution

# Implement connection pooling and retry logic
from sqlalchemy import create_engine
from sqlalchemy.pool import QueuePool
import time

def create_db_engine(retry_count=3, retry_delay=5):
    for attempt in range(retry_count):
        try:
            engine = create_engine(
                DATABASE_URL,
                poolclass=QueuePool,
                pool_size=10,
                max_overflow=20,
                pool_timeout=30,
                pool_recycle=3600
            )
            # Test connection
            with engine.connect() as conn:
                conn.execute("SELECT 1")
            return engine
        except Exception as e:
            if attempt < retry_count - 1:
                time.sleep(retry_delay)
                continue
            raise e

Best Practices for Troubleshooting

Enable verbose logging

export DEBUG=deepwikiopen:*
export LOG_LEVEL=debug

Use health check endpoints

curl http://localhost:8000/health
curl http://localhost:8000/api/status

Monitor system resources

# Create monitoring script
#!/bin/bash
while true; do
  echo "=== $(date) ==="
  docker stats --no-stream
  sleep 5
done

Implement comprehensive error handling

app.use((err, req, res, next) => {
  console.error('Error details:', {
    message: err.message,
    stack: err.stack,
    timestamp: new Date().toISOString(),
    request: {
      method: req.method,
      url: req.url,
      headers: req.headers
    }
  });
  
  res.status(err.status || 500).json({
    error: err.message,
    timestamp: new Date().toISOString(),
    requestId: req.id
  });
});

Getting Help

If you encounter issues not covered here:

Check the GitHub Issues
Enable debug logging and collect logs

Provide system information:

node --version
npm --version
docker --version
uname -a

Include minimal reproduction steps
Join our Discord community for real-time support

Examples

​Troubleshooting Scenarios

​1. API Key Validation Issues

​Scenario: “Invalid API key” error when starting the application

​Symptoms

​Debugging Steps

​Solutions

​2. Connection Problems (CORS, Network)

​Scenario: CORS errors when accessing the API

​Symptoms

​Debugging Steps

​Solutions

​3. Large Repository Handling

​Scenario: Application crashes when analyzing large repositories

​Symptoms

​Debugging Steps

​Solutions

​4. Memory and Performance Issues

​Scenario: Slow response times and high memory usage

​Debugging Steps

​Solutions

​5. Docker Container Problems

​Scenario: Container fails to start or crashes immediately

​Symptoms

​Debugging Steps

​Solutions

​6. Model Selection Errors

​Scenario: “Model not found” or incorrect model responses

​Symptoms

​Debugging Steps

​Solutions

​7. Private Repository Access Issues

​Scenario: Cannot access private GitHub repositories

​Symptoms

​Debugging Steps

​Solutions

​8. WebSocket Connection Failures

​Scenario: Real-time updates not working, WebSocket disconnects

​Symptoms

​Debugging Steps

​Solutions

​9. Rate Limiting Scenarios

​Scenario: API rate limit exceeded errors

​Symptoms

​Debugging Steps

​Solutions

​10. Common Error Messages and Solutions

​Error: “Context length exceeded”

​Solution

​Error: “WebContainer initialization failed”

​Solution

​Error: “Database connection timeout”

​Solution

​Best Practices for Troubleshooting

​Getting Help

Troubleshooting Scenarios

1. API Key Validation Issues

Scenario: “Invalid API key” error when starting the application

Symptoms

Debugging Steps

Solutions

2. Connection Problems (CORS, Network)

Scenario: CORS errors when accessing the API

Symptoms

Debugging Steps

Solutions

3. Large Repository Handling

Scenario: Application crashes when analyzing large repositories

Symptoms

Debugging Steps

Solutions

4. Memory and Performance Issues

Scenario: Slow response times and high memory usage

Debugging Steps

Solutions

5. Docker Container Problems

Scenario: Container fails to start or crashes immediately

Symptoms

Debugging Steps

Solutions

6. Model Selection Errors

Scenario: “Model not found” or incorrect model responses

Symptoms

Debugging Steps

Solutions

7. Private Repository Access Issues

Scenario: Cannot access private GitHub repositories

Symptoms

Debugging Steps

Solutions

8. WebSocket Connection Failures

Scenario: Real-time updates not working, WebSocket disconnects

Symptoms

Debugging Steps

Solutions

9. Rate Limiting Scenarios

Scenario: API rate limit exceeded errors

Symptoms

Debugging Steps

Solutions

10. Common Error Messages and Solutions

Error: “Context length exceeded”

Solution

Error: “WebContainer initialization failed”

Solution

Error: “Database connection timeout”

Solution

Best Practices for Troubleshooting

Getting Help