The error message 'redis error server closed the connection' typically occurs when Redis server unexpectedly closes the connection with the client. There are several possible reasons why this might occur, such as network connectivity issues, misconfiguration of Redis settings, or a surge in traffic that exceeds the capacity of the Redis server.
Additionally, it's possible that the connection was idle for too long, and the server closed the connection to free up resources. Another common cause is that the Redis server has reached its maximum number of open connections and cannot accept any more, which results in the server closing the connection.
To resolve the 'redis error server closed the connection' error, you can try several solutions. First, make sure that your network connectivity is stable and that there are no issues with firewalls or other networking components. If the problem persists, check the Redis configuration file to ensure that the maxconnections setting is set high enough to accommodate your traffic needs.
If the connection is idle for a long time, you can increase the timeout values in the Redis configuration file to prevent the server from closing the connection prematurely. You can also consider using connection pooling or load balancing techniques to distribute the load across multiple Redis servers, which can help alleviate capacity constraints.
Finally, if none of these solutions work, you may need to upgrade your Redis server or consider moving to a more scalable data store solution.