[jira] [Created] (KAFKA-18331) Consider to update process.roles default value to a non-empty value

[PoAn Yang (Jira)]

PoAn Yang created KAFKA-18331:
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             Summary: Consider to update process.roles default value to a 
non-empty value
                 Key: KAFKA-18331
                 URL: https://issues.apache.org/jira/browse/KAFKA-18331
             Project: Kafka
          Issue Type: Sub-task
            Reporter: PoAn Yang
            Assignee: PoAn Yang
             Fix For: 4.0.0


In Kafka 4.0, the ZK will be removed. In the code, if process.roles is empty, 
it means it's a node in ZK mode. We should consider to update the default value 
to a non-empty value, so that it doesn't confuse users.



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