Request queue size is not cleared on reconnect

[Hixon10]

Bug Report

1. There is a Java (spring) service, which uses Redis cluster with help lettuce.
2. We have a setting spring.redis.lettuce.pool.maxActive == 100_000
3. At some moment, the service lose network connectivity to one of redis cluster master nodes.
4. The service has a bunch of background queries, which are executed periodically (e.g. we execute ping query each second).
5. After some time, io.lettuce.core.protocol.DefaultEndpoint#QUEUE_SIZE is equal to 100_000 for some channels
6. As result, the service cannot execute any queries, using this connection. We got an error, like Request queue size exceeded: 100000. Commands are not accepted until the queue size drops.
7. After some time, the network connective issue is resolved.
8. The problem is, that the application still has io.lettuce.core.protocol.DefaultEndpoint#QUEUE_SIZE = 100_000. If I manually set this field to 0, the application starts working.

Environment

• Lettuce version(s): 6.1.2.RELEASE
• Redis version: 6.2.5

Maybe, it is similar to #616

[mp911de]

Lettuce auto-reconnects and replays commands upon reconnect and that should drain the queue.

[tishun]

@Hixon10 are you able to provide a reproducible example where this problem can be examined?

[Hixon10]

@tishun unfortunately, no. It was long time ago, I don't have any context for this issue anymore.

[tishun]

@tishun unfortunately, no. It was long time ago, I don't have any context for this issue anymore.

Thank you. I will be closing this for now and if somebody else runs into this again we can reopen.