How to resolve the error in redis that says “connection refused”?

The “connection refused” error usually occurs when the Redis server cannot be connected to or is being rejected. Here are some possible solutions:

1. To ensure that the Redis server is running, first check if it has been started. You can use the command “ps aux | grep redis-server” to see if the Redis server process is running.
2. Check the configuration file of the Redis server to ensure that the bind parameter is correctly configured, allowing your client to connect to the Redis server. You can find this parameter in the Redis configuration file and modify it to bind 0.0.0.0, then restart the Redis server.
3. Check firewall settings: Sometimes firewalls can prevent the connection between the Redis server and the client. Make sure to review your firewall settings and ensure that port 6379 (the default Redis port) is open.
4. Check connection parameters: If you are connecting to the Redis server via a client, make sure that your connection parameters (such as hostname, port number, password, etc.) are correct.
5. Sometimes, restarting both the Redis server and the client can solve connection issues.

If none of the above methods can solve the problem, it may be due to other network configurations or server configurations. You can further investigate network connection issues or check the Redis server’s log information to pinpoint the issue.