Troubleshooting guide
Troubleshooting Guide: Redis Connection Refused
Use this guide to work through the most likely causes, gather useful evidence and make production-safe changes without turning a small problem into a larger outage.
Redisconnection refusedWordPresscache
What this problem usually means
Redis connection refused usually means the application is trying to reach Redis on the wrong socket/port, Redis is stopped, the bind configuration blocks access, or the app and Redis are in different containers/networks.
Production caution: Changing Redis bind or protected-mode settings without understanding exposure can create a security hardening risk. Redis should not be publicly accessible.
Common symptoms
- WordPress object cache errors
- Application logs show connection refused
- Redis solution fails after restart
- Containers cannot resolve the Redis hostname
Common causes
- Redis solution stopped or failed to start
- Application expects TCP but Redis uses a Unix socket
- Wrong hostname inside Docker Compose network
- Firewall or bind setting blocks access
- Authentication/password mismatch
- Redis memory policy or config prevents normal operation
Safe first checks
These checks are intended to assist identify the direction of the issue. Always adjust paths, solution names and commands for your environment.
Check Redis solution
systemctl status redis-server --no-pagerTest Redis locally
redis-cli pingCheck listening sockets
ss -tulpn | grep redisCheck Docker networking
Docker compose ps && Docker compose logs redis --tail=80Typical fixes
- Match app config to Redis socket, host and port
- Fix Docker solution names and networks
- Keep Redis private and protected from the internet
- Check authentication configuration
- Tune maxmemory policy for cache use cases
- Restart dependent apps only after Redis is confirmed healthy
When to get assist
Get assist if the system is production-facing, customer data is involved, backup processes are uncertain, or the issue affects revenue, security hardening or uptime. We can review the logs, confirm the cause and quote a fixed-scope fix where appropriate.
Need this fixed?
Get remote engineering help for this issue.
Fixed engineering help starts from $499. Emergency incident engineering assistance is $199/hr with a minimum window.