[
https://issues.apache.org/jira/browse/KAFKA-13837?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jason Gustafson resolved KAFKA-13837.
-------------------------------------
Fix Version/s: 3.3.0
Resolution: Fixed
> Return error for Fetch requests from unrecognized followers
> -----------------------------------------------------------
>
> Key: KAFKA-13837
> URL: https://issues.apache.org/jira/browse/KAFKA-13837
> Project: Kafka
> Issue Type: Bug
> Reporter: Jason Gustafson
> Assignee: Jason Gustafson
> Priority: Major
> Fix For: 3.3.0
>
>
> If the leader of a partition receives a request from a replica which is not
> in the current replica set, we currently return an empty fetch response with
> no error. I think the rationale for this is that the leader may not have
> received the latest `LeaderAndIsr` update which adds the replica, so we just
> want the follower to retry. The problem with this is that if the
> `LeaderAndIsr` request never arrives, then there might not be an external
> indication of a problem. This probably was the only reasonable option before
> we added the leader epoch to the `Fetch` request API. Now that we have it, it
> would be clearer to return an `UNKNOWN_LEADER_EPOCH` error to indicate that
> the (replicaId, leaderEpoch) tuple is not recognized.
--
This message was sent by Atlassian Jira
(v8.20.7#820007)
