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https://issues.apache.org/jira/browse/KAFKA-4600?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sophie Blee-Goldman updated KAFKA-4600:
---------------------------------------
    Issue Type: Sub-task  (was: Bug)
        Parent: KAFKA-8179

> Consumer proceeds on when ConsumerRebalanceListener fails
> ---------------------------------------------------------
>
>                 Key: KAFKA-4600
>                 URL: https://issues.apache.org/jira/browse/KAFKA-4600
>             Project: Kafka
>          Issue Type: Sub-task
>          Components: consumer
>    Affects Versions: 0.10.1.1
>            Reporter: Braedon Vickers
>            Priority: Major
>
> One of the use cases for a ConsumerRebalanceListener is to load state 
> necessary for processing a partition when it is assigned. However, when 
> ConsumerRebalanceListener.onPartitionsAssigned() fails for some reason (i.e. 
> the state isn't loaded), the error is logged and the consumer proceeds on as 
> if nothing happened, happily consuming messages from the new partition. When 
> the state is relied upon for correct processing, this can be very bad, e.g. 
> data loss can occur.
> It would be better if the error was propagated up so it could be dealt with 
> normally. At the very least the assignment should fail so the consumer 
> doesn't see any messages from the new partitions, and the rebalance can be 
> reattempted.



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