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Posted to jira@kafka.apache.org by "David Arthur (Jira)" <ji...@apache.org> on 2023/02/01 17:30:00 UTC

[jira] [Updated] (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 updated KAFKA-14668:
---------------------------------
    Summary: Avoid sending unnecessary UMR in migration mode  (was: NoOpRecord causes unnecessary UMR in migration mode)

> 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
>            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 NoOpRecord is written, it will trigger the metadata synchronization logic and send out redundant UMR even if no metadata has changed. 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 has changed.



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