# kombu.exceptions.OperationalError: [Errno 111] Connection refused

- **ID:** `python/django-celery-connection-error`
- **Domain:** python
- **Category:** network_error
- **Verification:** ai_generated
- **Fix Rate:** 80%

## Root Cause

Celery broker (usually Redis or RabbitMQ) is not running or unreachable.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| 3.x | active | — | — |

## Workarounds

1. **** (90% success)
   ```
   Start Redis: redis-server or RabbitMQ: sudo systemctl start rabbitmq-server
   ```
2. **** (85% success)
   ```
   Verify CELERY_BROKER_URL='redis://localhost:6379/0' in settings.
   ```

## Dead Ends

- **** — Changing CELERY_BROKER_URL to a different port without starting service doesn't help. (60% fail)
- **** — Using localhost instead of 127.0.0.1 can cause IPv6 issues. (30% fail)