# Common Issues and Solutions

### Overview <a href="#overview" id="overview"></a>

This guide covers the most common issues users encounter with AINexLayer and provides step-by-step solutions. Issues are organized by category for easy navigation.

### Installation Issues <a href="#installation-issues" id="installation-issues"></a>

#### Docker Installation Problems <a href="#docker-installation-problems" id="docker-installation-problems"></a>

**Issue: Docker Container Won't Start**

**Symptoms:**

* Container exits immediately after starting
* Error messages in docker logs
* Port conflicts

**Solutions:**

```bash
# Check container logs
docker logs ainexlayer

# Check port availability
netstat -tulpn | grep :3000

# Restart with different port
docker run -p 8080:3001 alakinfotech/ainexlayer:latest

# Check system resources
docker system df
docker system prune -f
```

**Issue: Permission Denied Errors**

**Symptoms:**

* Permission denied when accessing storage
* Cannot write to mounted volumes
* File system errors

**Solutions:**

```bash
# Fix storage permissions
sudo chown -R $USER:$USER ./storage
chmod -R 755 ./storage

# Run with proper user
docker run --user $(id -u):$(id -g) alakinfotech/ainexlayer:latest

# Check volume mounts
docker run -v $(pwd)/storage:/app/server/storage alakinfotech/ainexlayer:latest
```

**Issue: Out of Memory Errors**

**Symptoms:**

* Container killed due to OOM
* Slow performance
* System becomes unresponsive

**Solutions:**

```bash
# Increase memory limits
docker run --memory=4g alakinfotech/ainexlayer:latest

# Check system memory
free -h
docker stats

# Optimize container resources
docker run --cpus=2 --memory=4g alakinfotech/ainexlayer:latest
```

#### Local Installation Problems <a href="#local-installation-problems" id="local-installation-problems"></a>

**Issue: Node.js Version Conflicts**

**Symptoms:**

* Module compatibility errors
* Build failures
* Runtime errors

**Solutions:**

```bash
# Check Node.js version
node --version
npm --version

# Use correct Node.js version
nvm install 18
nvm use 18

# Clear npm cache
npm cache clean --force

# Reinstall dependencies
rm -rf node_modules package-lock.json
npm install
```

**Issue: Python Dependencies**

**Symptoms:**

* Python module not found
* Scrapy installation failures
* Virtual environment issues

**Solutions:**

```bash
# Check Python version
python3 --version

# Create virtual environment
python3 -m venv venv
source venv/bin/activate

# Install dependencies
pip install -r requirements.txt

# Fix Scrapy installation
pip install --upgrade pip
pip install scrapy
```

### Configuration Issues <a href="#configuration-issues" id="configuration-issues"></a>

#### Environment Variables <a href="#environment-variables" id="environment-variables"></a>

**Issue: Missing Environment Variables**

**Symptoms:**

* Application fails to start
* Configuration errors
* Missing API keys

**Solutions:**

```bash
# Check environment variables
env | grep -E "(OPEN_AI_KEY|JWT_SECRET|VECTOR_DB)"

# Create .env file
cat > .env << EOF
OPEN_AI_KEY=your-openai-api-key
JWT_SECRET=your-jwt-secret
VECTOR_DB=lancedb
NODE_ENV=production
EOF

# Load environment variables
source .env
```

**Issue: Invalid API Keys**

**Symptoms:**

* Authentication failures
* API rate limit errors
* Model not found errors

**Solutions:**

```bash
# Test OpenAI API key
curl -H "Authorization: Bearer $OPEN_AI_KEY" \
     https://api.openai.com/v1/models

# Check API key format
echo $OPEN_AI_KEY | wc -c

# Regenerate API key
# Go to OpenAI dashboard and create new key
```

#### Database Configuration <a href="#database-configuration" id="database-configuration"></a>

**Issue: Database Connection Failed**

**Symptoms:**

* Cannot connect to database
* Connection timeout errors
* Authentication failures

**Solutions:**

```bash
# Check database status
docker ps | grep postgres

# Test database connection
psql -h localhost -U ainexlayer -d ainexlayer

# Reset database password
docker exec -it postgres psql -U postgres -c "ALTER USER ainexlayer PASSWORD 'newpassword';"

# Check database logs
docker logs postgres
```

**Issue: Vector Database Issues**

**Symptoms:**

* Vector search not working
* Embedding generation failures
* Index corruption

**Solutions:**

```bash
# Check vector database status
curl http://localhost:8080/health

# Rebuild vector index
curl -X POST http://localhost:3001/api/v1/vectors/rebuild

# Clear vector cache
rm -rf ./storage/vectors/*
```

### Performance Issues <a href="#performance-issues" id="performance-issues"></a>

#### Slow Response Times <a href="#slow-response-times" id="slow-response-times"></a>

**Issue: High Latency**

**Symptoms:**

* Slow API responses
* Timeout errors
* Poor user experience

**Solutions:**

```bash
# Check system resources
htop
df -h
free -h

# Optimize Docker resources
docker run --cpus=4 --memory=8g alakinfotech/ainexlayer:latest

# Enable caching
export ENABLE_CACHE=true
export CACHE_TTL=3600

# Use faster AI models
export LLM_MODEL=gpt-3.5-turbo
```

**Issue: Memory Usage Issues**

**Symptoms:**

* High memory consumption
* System slowdown
* Out of memory errors

**Solutions:**

```bash
# Monitor memory usage
docker stats

# Limit memory usage
docker run --memory=4g --memory-swap=4g alakinfotech/ainexlayer:latest

# Optimize Node.js memory
export NODE_OPTIONS="--max-old-space-size=4096"

# Clear caches
curl -X POST http://localhost:3001/api/v1/cache/clear
```

#### Document Processing Issues <a href="#document-processing-issues" id="document-processing-issues"></a>

**Issue: Slow Document Processing**

**Symptoms:**

* Documents take long to process
* Processing queue backlog
* Timeout errors

**Solutions:**

```bash
# Check processing queue
curl http://localhost:3001/api/v1/processing/status

# Increase processing workers
export PROCESSING_WORKERS=4

# Optimize document chunking
export CHUNK_SIZE=1000
export CHUNK_OVERLAP=200

# Use faster embedding models
export EMBEDDING_MODEL=text-embedding-3-small
```

**Issue: OCR Processing Failures**

**Symptoms:**

* Image text not extracted
* OCR errors
* Poor text quality

**Solutions:**

```bash
# Check OCR dependencies
pip list | grep tesseract

# Install Tesseract
sudo apt-get install tesseract-ocr

# Test OCR
tesseract image.png output.txt

# Configure OCR settings
export OCR_LANGUAGE=eng
export OCR_ENGINE=tesseract
```

### API Issues <a href="#api-issues" id="api-issues"></a>

#### Authentication Problems <a href="#authentication-problems" id="authentication-problems"></a>

**Issue: JWT Token Errors**

**Symptoms:**

* Invalid token errors
* Authentication failures
* Session expired

**Solutions:**

```bash
# Check JWT secret
echo $JWT_SECRET

# Generate new JWT secret
openssl rand -base64 32

# Clear invalid tokens
curl -X POST http://localhost:3001/api/v1/auth/logout

# Test authentication
curl -H "Authorization: Bearer $TOKEN" \
     http://localhost:3001/api/v1/workspaces
```

**Issue: API Rate Limiting**

**Symptoms:**

* Rate limit exceeded errors
* 429 HTTP status codes
* API quota issues

**Solutions:**

```bash
# Check rate limits
curl http://localhost:3001/api/v1/system/limits

# Increase rate limits
export RATE_LIMIT_WINDOW=900000
export RATE_LIMIT_MAX=1000

# Implement request queuing
export ENABLE_QUEUE=true
export QUEUE_SIZE=100
```

#### Webhook Issues <a href="#webhook-issues" id="webhook-issues"></a>

**Issue: Webhook Delivery Failures**

**Symptoms:**

* Webhooks not received
* Delivery timeout errors
* Invalid signatures

**Solutions:**

```bash
# Check webhook status
curl http://localhost:3001/api/v1/webhooks/status

# Test webhook endpoint
curl -X POST http://localhost:3001/api/v1/webhooks/test \
     -H "Content-Type: application/json" \
     -d '{"url": "https://your-app.com/webhook"}'

# Verify webhook signature
# Check signature verification in your webhook handler
```

### File and Storage Issues <a href="#file-and-storage-issues" id="file-and-storage-issues"></a>

#### File Upload Problems <a href="#file-upload-problems" id="file-upload-problems"></a>

**Issue: File Upload Failures**

**Symptoms:**

* Upload timeout errors
* File size limit exceeded
* Invalid file format

**Solutions:**

```bash
# Check file size limits
export MAX_FILE_SIZE=100MB

# Increase upload timeout
export UPLOAD_TIMEOUT=300000

# Check supported formats
curl http://localhost:3001/api/v1/supported-formats

# Test file upload
curl -X POST http://localhost:3001/api/v1/documents/upload \
     -F "file=@document.pdf"
```

**Issue: Storage Space Issues**

**Symptoms:**

* Disk space full
* Storage errors
* File system errors

**Solutions:**

```bash
# Check disk space
df -h

# Clean up old files
find ./storage -name "*.tmp" -mtime +7 -delete

# Compress old documents
tar -czf old_documents.tar.gz ./storage/old_documents/

# Move to external storage
aws s3 sync ./storage s3://your-backup-bucket/
```

#### Vector Database Issues <a href="#vector-database-issues" id="vector-database-issues"></a>

**Issue: Vector Search Not Working**

**Symptoms:**

* Search returns no results
* Vector similarity errors
* Index corruption

**Solutions:**

```bash
# Check vector database health
curl http://localhost:3001/api/v1/vectors/health

# Rebuild vector index
curl -X POST http://localhost:3001/api/v1/vectors/rebuild

# Check embedding generation
curl -X POST http://localhost:3001/api/v1/embeddings/generate \
     -H "Content-Type: application/json" \
     -d '{"text": "test document"}'
```

### Network and Connectivity Issues <a href="#network-and-connectivity-issues" id="network-and-connectivity-issues"></a>

#### Port and Firewall Issues <a href="#port-and-firewall-issues" id="port-and-firewall-issues"></a>

**Issue: Port Already in Use**

**Symptoms:**

* Port binding errors
* Service won't start
* Connection refused

**Solutions:**

```bash
# Check port usage
netstat -tulpn | grep :3000
lsof -i :3000

# Kill process using port
sudo kill -9 $(lsof -t -i:3000)

# Use different port
docker run -p 8080:3001 alakinfotech/ainexlayer:latest

# Check firewall
sudo ufw status
sudo ufw allow 3000
```

**Issue: Network Connectivity**

**Symptoms:**

* Cannot reach external APIs
* DNS resolution failures
* Proxy issues

**Solutions:**

```bash
# Test network connectivity
ping google.com
curl -I https://api.openai.com

# Check DNS
nslookup api.openai.com

# Configure proxy
export HTTP_PROXY=http://proxy:8080
export HTTPS_PROXY=http://proxy:8080

# Test with proxy
curl --proxy http://proxy:8080 https://api.openai.com
```

### AI Model Issues <a href="#ai-model-issues" id="ai-model-issues"></a>

#### Model Configuration Problems <a href="#model-configuration-problems" id="model-configuration-problems"></a>

**Issue: Model Not Found**

**Symptoms:**

* Model not available errors
* Invalid model name
* API key issues

**Solutions:**

```bash
# Check available models
curl -H "Authorization: Bearer $OPEN_AI_KEY" \
     https://api.openai.com/v1/models

# Test model access
curl -X POST https://api.openai.com/v1/chat/completions \
     -H "Authorization: Bearer $OPEN_AI_KEY" \
     -H "Content-Type: application/json" \
     -d '{"model": "gpt-3.5-turbo", "messages": [{"role": "user", "content": "test"}]}'

# Use fallback model
export FALLBACK_MODEL=gpt-3.5-turbo
```

**Issue: Embedding Generation Failures**

**Symptoms:**

* Embedding API errors
* Vector dimension mismatches
* Rate limit issues

**Solutions:**

```bash
# Test embedding API
curl -X POST https://api.openai.com/v1/embeddings \
     -H "Authorization: Bearer $OPEN_AI_KEY" \
     -H "Content-Type: application/json" \
     -d '{"input": "test text", "model": "text-embedding-3-small"}'

# Check embedding dimensions
export EMBEDDING_DIMENSIONS=1536

# Use local embeddings
export EMBEDDING_PROVIDER=sentence-transformers
export EMBEDDING_MODEL=all-MiniLM-L6-v2
```

### Logging and Debugging <a href="#logging-and-debugging" id="logging-and-debugging"></a>

#### Enable Debug Logging <a href="#enable-debug-logging" id="enable-debug-logging"></a>

**Issue: Insufficient Logging**

**Symptoms:**

* Hard to diagnose issues
* Missing error details
* Poor troubleshooting

**Solutions:**

```bash
# Enable debug logging
export LOG_LEVEL=debug
export DEBUG=ainexlayer:*

# Check log files
tail -f ./logs/ainexlayer.log
tail -f ./logs/error.log

# Enable request logging
export ENABLE_REQUEST_LOGGING=true

# Check system logs
journalctl -u ainexlayer -f
```

#### Performance Monitoring <a href="#performance-monitoring" id="performance-monitoring"></a>

**Issue: Performance Degradation**

**Symptoms:**

* Slow system performance
* High resource usage
* Poor user experience

**Solutions:**

```bash
# Monitor system performance
htop
iotop
nethogs

# Check application metrics
curl http://localhost:3001/api/v1/metrics

# Enable performance monitoring
export ENABLE_METRICS=true
export METRICS_PORT=9090

# Check database performance
EXPLAIN ANALYZE SELECT * FROM documents WHERE workspace_id = '123';
```

### Recovery Procedures <a href="#recovery-procedures" id="recovery-procedures"></a>

#### Data Recovery <a href="#data-recovery" id="data-recovery"></a>

**Issue: Data Loss**

**Symptoms:**

* Missing documents
* Corrupted data
* Database errors

**Solutions:**

```bash
# Check database integrity
pg_dump -h localhost -U ainexlayer ainexlayer > backup.sql

# Restore from backup
psql -h localhost -U ainexlayer ainexlayer < backup.sql

# Rebuild vector index
curl -X POST http://localhost:3001/api/v1/vectors/rebuild

# Check file system
fsck /dev/sda1
```

#### System Recovery <a href="#system-recovery" id="system-recovery"></a>

**Issue: System Failure**

**Symptoms:**

* Service won't start
* Complete system failure
* Data corruption

**Solutions:**

```bash
# Restart services
docker-compose down
docker-compose up -d

# Check system health
docker-compose ps
docker-compose logs

# Restore from backup
tar -xzf backup.tar.gz
docker-compose up -d

# Verify system health
curl http://localhost:3001/api/v1/system/health
```

### Prevention and Best Practices <a href="#prevention-and-best-practices" id="prevention-and-best-practices"></a>

#### Regular Maintenance <a href="#regular-maintenance" id="regular-maintenance"></a>

**System Health Checks**

```bash
#!/bin/bash
# health-check.sh

# Check system resources
echo "=== System Resources ==="
free -h
df -h

# Check service status
echo "=== Service Status ==="
docker-compose ps

# Check API health
echo "=== API Health ==="
curl -f http://localhost:3001/api/v1/system/health

# Check database
echo "=== Database Status ==="
docker exec postgres pg_isready -U ainexlayer

# Check logs for errors
echo "=== Recent Errors ==="
tail -n 100 ./logs/error.log | grep ERROR
```

**Automated Monitoring**

```bash
#!/bin/bash
# monitor.sh

# Monitor system metrics
while true; do
    # Check CPU usage
    CPU_USAGE=$(top -bn1 | grep "Cpu(s)" | awk '{print $2}' | cut -d'%' -f1)

    # Check memory usage
    MEM_USAGE=$(free | grep Mem | awk '{printf("%.2f"), $3/$2 * 100.0}')

    # Check disk usage
    DISK_USAGE=$(df / | tail -1 | awk '{print $5}' | cut -d'%' -f1)

    # Alert if thresholds exceeded
    if (( $(echo "$CPU_USAGE > 80" | bc -l) )); then
        echo "High CPU usage: $CPU_USAGE%"
    fi

    if (( $(echo "$MEM_USAGE > 80" | bc -l) )); then
        echo "High memory usage: $MEM_USAGE%"
    fi

    if [ $DISK_USAGE -gt 80 ]; then
        echo "High disk usage: $DISK_USAGE%"
    fi

    sleep 60
done
```

#### Backup Procedures <a href="#backup-procedures" id="backup-procedures"></a>

**Automated Backups**

```bash
#!/bin/bash
# backup.sh

# Create backup directory
BACKUP_DIR="/backups/$(date +%Y%m%d)"
mkdir -p $BACKUP_DIR

# Backup database
docker exec postgres pg_dump -U ainexlayer ainexlayer > $BACKUP_DIR/database.sql

# Backup application data
tar -czf $BACKUP_DIR/storage.tar.gz ./storage/

# Backup configuration
cp .env $BACKUP_DIR/
cp docker-compose.yml $BACKUP_DIR/

# Upload to cloud storage
aws s3 sync $BACKUP_DIR s3://your-backup-bucket/$(date +%Y%m%d)/

# Clean up old backups
find /backups -type d -mtime +7 -exec rm -rf {} \;
```

### Getting Help <a href="#getting-help" id="getting-help"></a>

#### Support Channels <a href="#support-channels" id="support-channels"></a>

**Documentation**

* **User Guide**: Comprehensive user documentation
* **API Reference**: Complete API documentation
* **Troubleshooting**: This troubleshooting guide
* **FAQ**: Frequently asked questions

**Community Support**

* **GitHub Issues**: Report bugs and request features
* **Discord Community**: Real-time community support
* **Stack Overflow**: Technical questions and answers
* **Reddit**: General discussions and tips

**Professional Support**

* **Email Support**: <support@ainexlayer.com>
* **Priority Support**: For enterprise customers
* **Custom Development**: Tailored solutions
* **Training**: Professional training services

#### Reporting Issues <a href="#reporting-issues" id="reporting-issues"></a>

**Issue Template**

```markdown
## Issue Description
Brief description of the issue

## Steps to Reproduce
1. Step 1
2. Step 2
3. Step 3

## Expected Behavior
What you expected to happen

## Actual Behavior
What actually happened

## Environment
- OS: [e.g., Ubuntu 20.04]
- Docker version: [e.g., 20.10.7]
- AINexLayer version: [e.g., 1.8.5]

## Logs
```

Paste relevant logs here

```

## Additional Context
Any additional information that might be helpful
```

***

**🔧 This troubleshooting guide covers the most common issues and solutions. For additional help, consult the support channels or contact our support team.**

<br>


---

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```
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```

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