[jira] [Created] (KAFKA-12961) Verify group generation in `DelayedJoin`

[David Jacot (Jira)]

David Jacot created KAFKA-12961:
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             Summary: Verify group generation in `DelayedJoin`
                 Key: KAFKA-12961
                 URL: https://issues.apache.org/jira/browse/KAFKA-12961
             Project: Kafka
          Issue Type: Improvement
            Reporter: David Jacot
            Assignee: David Jacot


We have recently introduced `DelayedSync` operation. In order to make it 
robust, it verifies the generation that it expects. This ensure that a lost 
delayed operation does not interfere with a newer generation. We should do the 
same for `DelayedJoin`.



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