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https://issues.apache.org/jira/browse/KAFKA-14661?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17682678#comment-17682678
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Ismael Juma commented on KAFKA-14661:
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3.6.x supported zk 3.4 clients, so this change has compatibility impact - i.e.
we probably need a KIP. The second question is: what server versions are
supported by 3.8.x clients?
> Upgrade Zookeeper to 3.8.1
> ---------------------------
>
> Key: KAFKA-14661
> URL: https://issues.apache.org/jira/browse/KAFKA-14661
> Project: Kafka
> Issue Type: Improvement
> Components: packaging
> Reporter: Divij Vaidya
> Assignee: Christo Lolov
> Priority: Blocker
> Fix For: 3.5.0, 3.4.1, 3.3.3
>
>
> Current Zk version (3.6.x) supported by Apache Kafka has been EOL since
> December 2022 [1]
> Users of Kafka are facing regulatory hurdles because of using a dependency
> which is EOL, hence, I would suggest to upgrade this in all upcoming releases
> (including patch releases of 3.3.x and 3.4.x versions).
> Some things to consider while upgrading (as pointed by [~ijuma] at [2]):
> # If we upgrade the zk server to 3.8.1, what is the impact on the zk
> clients. That is, what's the earliest zk client version that is supported by
> the 3.8.x server?
> # We need to ensure there are no regressions (particularly on the stability
> front) when it comes to this upgrade. It would be good for someone to stress
> test the system a bit with the new version and check if all works well.
> [1] [https://zookeeper.apache.org/releases.html]
> [2][https://github.com/apache/kafka/pull/12620#issuecomment-1409028650]
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