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Posted to jira@kafka.apache.org by "David Arthur (Jira)" <ji...@apache.org> on 2023/02/01 17:37:00 UTC

[jira] [Assigned] (KAFKA-14668) Avoid sending unnecessary UMR in migration mode

     [ https://issues.apache.org/jira/browse/KAFKA-14668?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

David Arthur reassigned KAFKA-14668:
------------------------------------

    Assignee: David Arthur

> Avoid sending unnecessary UMR in migration mode
> -----------------------------------------------
>
>                 Key: KAFKA-14668
>                 URL: https://issues.apache.org/jira/browse/KAFKA-14668
>             Project: Kafka
>          Issue Type: Bug
>            Reporter: David Arthur
>            Assignee: David Arthur
>            Priority: Major
>
> While the KRaftMigrationDriver is in "dual write" mode, in addition to propagating metadata back to ZooKeeper, it is sending controller RPCs to ZK brokers. When a MetadataDelta is published, it will trigger the metadata synchronization logic and send out redundant UMR even if there is no metadata to change in the UMR. This doesn't affect correctness of the metadata in the cluster, but will have a significant impact on performance for larger clusters.
>  
> We need to avoid sending RPCs to the ZK brokers when nothing relevant has changed.



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