[jira] [Resolved] (KAFKA-1676) Ability to cancel replica reassignment in progress

["Colin McCabe (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-1676?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Colin McCabe resolved KAFKA-1676.
---------------------------------
    Fix Version/s: 2.5.0
         Assignee: Colin McCabe
       Resolution: Fixed

> Ability to cancel replica reassignment in progress
> --------------------------------------------------
>
>                 Key: KAFKA-1676
>                 URL: https://issues.apache.org/jira/browse/KAFKA-1676
>             Project: Kafka
>          Issue Type: New Feature
>          Components: controller
>    Affects Versions: 0.8.1.1
>            Reporter: Ryan Berdeen
>            Assignee: Colin McCabe
>            Priority: Major
>              Labels: newbie
>             Fix For: 2.5.0
>
>
> I've had several situations where I have started a replica reassignment that I've needed to cancel before it completed.
> This has happened 
> * when moving to a new broker that turns out to be running on an impaired server
> * if the extra replication hurts cluster performance
> * dealing with replication bugs in kafka, like KAFKA-1670
> * when a single replica reassignment is taking a long time, and I want to start more replica assignments without waiting for the current one to finish.
> For the first three cases, as a last resort I have deleted the {{/admin/reassign_partitions}} key from ZooKeeper and restarted the controller. I would like to be able to do this by signaling the controller to stop, and to leave the list of assignments as they exist at that moment.



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