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https://issues.apache.org/jira/browse/KAFKA-18919?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chia-Ping Tsai resolved KAFKA-18919.
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Resolution: Fixed
trunk:
https://github.com/apache/kafka/commit/6ecf6817ad3fcfc91f3d35caaf4ea37d1f83f9fa
4.0:
https://github.com/apache/kafka/commit/22d79b203ae291e65513353a8f7f8e68a5ea57d7
> Clarify that KafkaPrincipalBuilder classes must also implement
> KafkaPrincipalSerde
> ----------------------------------------------------------------------------------
>
> Key: KAFKA-18919
> URL: https://issues.apache.org/jira/browse/KAFKA-18919
> Project: Kafka
> Issue Type: Sub-task
> Reporter: Mickael Maison
> Assignee: Szu-Yung Wang
> Priority: Major
> Fix For: 4.0.0
>
>
> In KRaft, custom KafkaPrincipalBuilder implementations must also implement
> KafkaPrincipalSerde, otherwise brokers are not able to forward requests to
> the controller.
> So we need to update our docs.
> -We should also be able to do some cleanup in the code. For example
> RequestContext uses Optional<KafkaPrincipalSerde>, we should be able to
> remove Optional since it's now always present.- moved to KAFKA-18922
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