Troubleshooting

Common issues and solutions for RouteMQ applications.

Topics

• Common Issues - Frequently encountered problems

• Connection Problems - MQTT and database connectivity

• Performance Issues - Optimization and debugging

• Redis Issues - Redis-specific problems

• Debug Mode - Enabling detailed logging

Common Issues

1. Routes Not Loading

Problem: Routes defined in router files are not being discovered

Solutions:

• Check that router files have a router variable

• Ensure router files are in the correct directory (app/routers/)

• Verify router files have proper Python syntax

• Check logs for import errors

2. Worker Processes Not Starting

Problem: Shared subscription workers are not starting

Solutions:

• Ensure shared routes are properly configured with shared=True

• Check worker_count parameter is set correctly

• Verify MQTT broker supports shared subscriptions

• Check for port conflicts or permission issues

3. Database Connection Issues

Problem: Cannot connect to MySQL database

Solutions:

• Verify database credentials in .env file

• Check network connectivity to database server

• Ensure database exists and user has proper permissions

• Check database server is running

4. MQTT Connection Failed

Problem: Cannot connect to MQTT broker

Solutions:

• Check broker address, port, and credentials

• Verify MQTT broker is running and accessible

• Check firewall settings

• Test connection with MQTT client tools

5. Redis Connection Failed

Problem: Cannot connect to Redis server

Solutions:

• Verify Redis server is running

• Check Redis credentials and configuration

• Test Redis connection with redis-cli

• Verify network connectivity

6. Rate Limiting Not Working

Problem: Rate limiting middleware not blocking requests

Solutions:

• Ensure Redis is enabled or fallback mode is configured

• Check rate limiting configuration parameters

• Verify middleware is properly applied to routes

• Check Redis key expiration settings

Debug Mode

Enable debug logging for detailed troubleshooting:

LOG_LEVEL=DEBUG

This provides detailed information about:

• Route discovery and loading process

• Message processing and middleware execution

• Worker process management

• Redis operations and connection status

• Rate limiting decisions and calculations

Getting Help

1. Check the logs for error messages

2. Enable debug mode for detailed information

3. Verify configuration settings

4. Test individual components in isolation

5. Check the FAQ for common questions

Next Steps

• Common Issues - Detailed problem solutions

• Performance Issues - Optimization tips

• Debug Mode - Advanced debugging techniques