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https://issues.apache.org/jira/browse/KAFKA-16375?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lianet Magrans updated KAFKA-16375:
-----------------------------------
    Priority: Critical  (was: Major)

> Fix logic for discarding reconciliation if member rejoined
> ----------------------------------------------------------
>
>                 Key: KAFKA-16375
>                 URL: https://issues.apache.org/jira/browse/KAFKA-16375
>             Project: Kafka
>          Issue Type: Sub-task
>          Components: clients, consumer
>            Reporter: Lianet Magrans
>            Assignee: Lianet Magrans
>            Priority: Critical
>              Labels: kip-848-client-support
>
> The current implementation of the new consumer discards the result of a 
> reconciliation if the member rejoined, based on a comparison of the member 
> epoch at the start and end of the reconciliation. If the epochs changed the 
> reconciliation is discarded. This is not right because the member epoch could 
> be incremented without an assignment change. This should be fixed to ensure 
> that the reconciliation is discarded if the member rejoined, probably based 
> on a flag that truly reflects that it went through a transition to joining. 
> As a potential improvement, consider if the member could keep the 
> reconciliation if it rejoined but got the same assignment.



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