Mickael Maison created KAFKA-18919:
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Summary: Clarify that KafkaPrincipalBuilder classes must also
implement KafkaPrincipalSerde
Key: KAFKA-18919
URL: https://issues.apache.org/jira/browse/KAFKA-18919
Project: Kafka
Issue Type: Task
Reporter: Mickael Maison
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.
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