Jason Gustafson created KAFKA-8653:
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             Summary: Regression in JoinGroup v0 rebalance timeout handling
                 Key: KAFKA-8653
                 URL: https://issues.apache.org/jira/browse/KAFKA-8653
             Project: Kafka
          Issue Type: Bug
    Affects Versions: 2.3.0
            Reporter: Jason Gustafson


The rebalance timeout was added to the JoinGroup protocol in version 1. Prior 
to 2.3, we handled version 0 JoinGroup requests by setting the rebalance 
timeout to be equal to the session timeout. We lost this logic when we 
converted the API to use the generated schema definition which uses the default 
value of -1. The impact of this is that the group rebalance timeout becomes 0, 
so rebalances finish immediately after we enter the PrepareRebalance state and 
kick out all old members. This causes consumer groups to enter an endless 
rebalance loop.



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