[jira] [Updated] (KAFKA-15911) KRaft quorum leader should make sure the follower fetch is making progress

["José Armando García Sancio (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-15911?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

José Armando García Sancio updated KAFKA-15911:
-----------------------------------------------
    Affects Version/s: 3.7.0

> KRaft quorum leader should make sure the follower fetch is making progress
> --------------------------------------------------------------------------
>
>                 Key: KAFKA-15911
>                 URL: https://issues.apache.org/jira/browse/KAFKA-15911
>             Project: Kafka
>          Issue Type: Bug
>          Components: kraft
>    Affects Versions: 3.7.0
>            Reporter: Luke Chen
>            Priority: Major
>
> Just because the leader returned a successful response to FETCH and FETCH_SNAPSHOT doesn't mean that the followers were able to handle the response correctly.
> For example, imagine the case where the log end offset (LEO) is at 1000 and all of the followers are continuously fetching at offset 0 without ever increasing their fetch offset. This can happen if the followers encounter an error when processing the FETCH or FETCH_SNAPSHOT response.
> In this scenario the leader will never be able to increase the HWM. I think that this scenario is specific to KRaft and doesn't exists in Raft because KRaft is pull vs Raft which is push.
> https://github.com/apache/kafka/pull/14428#pullrequestreview-1751408695



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