Error: redis sentinel error connection reset by peer

What's Causing This Error

The error 'redis sentinel error connection reset by peer' typically occurs when the connection between the Redis client and the server is unexpectedly closed. This can happen due to several reasons:

1. Network Issues: If there are any network disruptions or instability, it could cause the connection to be reset.
2. Redis Server Overload: The Redis server may forcibly close connections if it's overloaded or unable to handle the incoming requests.
3. Timeouts: An idle or inactive connection could be terminated based on the Redis configuration for timeouts.
4. Sentinel Configuration Issues: If the Sentinels are not correctly configured, they might not be able to maintain a stable connection with the Redis server.

Solution - Here's How To Resolve It

Resolving this error involves checking and adjusting various aspects of your Redis setup:

1. Check Network Stability: Ensure that the network connection between your client and the Redis server is stable and reliable. You might need to involve your network team to troubleshoot this.
2. Monitor Server Load: Use monitoring tools to check if the Redis server is under heavy load. If it is, consider scaling your Redis setup either vertically (more powerful machine) or horizontally (more instances).
3. Adjust Timeout Settings: Check your Redis configuration for any timeout settings like timeout or tcp-keepalive. You may need to adjust these values based on your application needs.
4. Verify Sentinel Configuration: Ensure that your Sentinels are correctly set up. They should have the right address and port for the Redis servers, and there should be enough Sentinels to ensure high availability.
5. Keep Redis Updated: Make sure you're using a recent and stable version of Redis. Some connection issues may have been fixed in later releases.