[jira] [Created] (KAFKA-19720) Regex subscription should be empty for classic members joining mixed group

[Dongnuo Lyu (Jira)]

Dongnuo Lyu created KAFKA-19720:
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             Summary: Regex subscription should be empty for classic members 
joining mixed group
                 Key: KAFKA-19720
                 URL: https://issues.apache.org/jira/browse/KAFKA-19720
             Project: Kafka
          Issue Type: Bug
            Reporter: Dongnuo Lyu


We don't recompute the assignment on consumer -> classic member replacement 
when the consumer member had a regex subscription and the classic member does 
not.

We should explicitly set regex subscription to empty in 
classicGroupJoinToConsumerGroup



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