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https://issues.apache.org/jira/browse/KAFKA-9421?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17014706#comment-17014706
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Boyang Chen commented on KAFKA-9421:
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At the moment it doesn’t seem necessary for existing use cases.
Also for really advanced users, they may actually want to let their consumers
work concurrently on one partition,
I guess this will then become a user’s responsibility for making their
customized partition assignor behave correctly.
> Restricting access of commit for consumer member
> ------------------------------------------------
>
> Key: KAFKA-9421
> URL: https://issues.apache.org/jira/browse/KAFKA-9421
> Project: Kafka
> Issue Type: Improvement
> Reporter: Boyang Chen
> Priority: Major
>
> Currently for during each generation, the partition ownership should be
> unique for members, which infers we shouldn't allow multiple consumers
> committing to the same partition. This logic is currently not supported on
> broker side, and we should discuss whether this is needed and useful.
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