[jira] [Commented] (KAFKA-1506) Cancel "kafka-reassign-partitions" Job

["Matthias Rampke (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-1506?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16233942#comment-16233942 ] 

Matthias Rampke commented on KAFKA-1506:
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Related issue with more reasons to cancel: KAFKA-1676

There are lots of reasons one would want to cancel a reassignment, completely unrelated to bugs in Kafka and purely out of operational considerations (we decided we don't want to do this after all; the reassignment is hurting cluster performance too much; the reassignment is to a dead broker). It appears that the only way to do this is to mess with Zookeeper, or lying about broker IDs (bringing up a new broker with an old ID).

For me, just cancelling everything that is going on and leaving things where they are is the right thing to do – one of the reasons to cancel is because the act of moving things around hurts the cluster, and in that case moving everything back would be just as bad. I would not expect anything to be moved back. Just being able to tell Kafka to "stop and hold" would be a significant improvement, and let operators then re-reassign as needed.

> Cancel "kafka-reassign-partitions" Job
> --------------------------------------
>
>                 Key: KAFKA-1506
>                 URL: https://issues.apache.org/jira/browse/KAFKA-1506
>             Project: Kafka
>          Issue Type: New Feature
>          Components: replication, tools
>    Affects Versions: 0.8.1, 0.8.1.1
>            Reporter: Paul Lung
>            Priority: Major
>              Labels: newbie++
>
> I started a reassignment, and for some reason it just takes forever. However, it won¹t let me start another reassignment job while this one is running. So a tool to cancel a reassignment job is needed. 



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