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Posted to jira@kafka.apache.org by "Guozhang Wang (Jira)" <ji...@apache.org> on 2021/03/16 02:56:00 UTC

[jira] [Commented] (KAFKA-12473) Make the CooperativeStickyAssignor the default assignor

    [ https://issues.apache.org/jira/browse/KAFKA-12473?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17302178#comment-17302178 ] 

Guozhang Wang commented on KAFKA-12473:
---------------------------------------

Thanks for filing this [~ableegoldman]! The plan SGTM.

> Make the CooperativeStickyAssignor the default assignor
> -------------------------------------------------------
>
>                 Key: KAFKA-12473
>                 URL: https://issues.apache.org/jira/browse/KAFKA-12473
>             Project: Kafka
>          Issue Type: Improvement
>          Components: consumer
>            Reporter: A. Sophie Blee-Goldman
>            Priority: Critical
>             Fix For: 3.0.0
>
>
> Now that 3.0 is coming up, we can change the default ConsumerPartitionAssignor to something better than the RangeAssignor. The original plan was to switch over to the StickyAssignor, but now that we have incremental cooperative rebalancing we should  consider using the new CooperativeStickyAssignor instead: this will enable the consumer group to follow the COOPERATIVE protocol, improving the rebalancing experience OOTB.
> Note that this will require users to follow the upgrade path laid out in KIP-429 to safely perform a rolling upgrade. When we change the default assignor we need to make sure this is clearly documented in the upgrade guide for 3.0



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