StackExchange.Redis Disconnection Pitfalls

This article summarizes common pitfalls and solutions for StackExchange.Redis connection interruptions and reconnection failures. The primary issue is that the default configuration has `abortConnect` set to `true`, which prevents automatic recovery after a disconnection. To enable automatic reconnection, you must set `abortConnect=false` in the connection string. Second, reconnection failures may still occur under high load. It is recommended to catch `RedisConnectionException` and manually rebuild the `ConnectionMultiplexer` instance. Regarding the issue in Linux environments where reconnection can take up to 15 minutes after a disconnection, the root cause is that the kernel parameter `tcp_retries2` has a default value that is too large. You can adjust it to `5` using the `sysctl` command to accelerate TCP layer release. Finally, it is emphasized that `ConnectionMultiplexer` must be used as a singleton. Creating a new connection for every request is strictly prohibited, as it can lead to a connection explosion. It is recommended to register it as a singleton service in dependency injection.