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From "Neha Narkhede (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KAFKA-840) Controller tries to perform preferred replica election on failover before state machines have started up
Date Thu, 04 Apr 2013 06:45:15 GMT

    [ https://issues.apache.org/jira/browse/KAFKA-840?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13621861#comment-13621861
] 

Neha Narkhede commented on KAFKA-840:
-------------------------------------

Committed 'after-commit-v2' patch to 0.8
                
> Controller tries to perform preferred replica election on failover before state machines
have started up
> --------------------------------------------------------------------------------------------------------
>
>                 Key: KAFKA-840
>                 URL: https://issues.apache.org/jira/browse/KAFKA-840
>             Project: Kafka
>          Issue Type: Bug
>          Components: controller
>    Affects Versions: 0.8
>            Reporter: Swapnil Ghike
>            Assignee: Swapnil Ghike
>            Priority: Blocker
>              Labels: bugs
>             Fix For: 0.8
>
>         Attachments: kafka-840-after-commit-v1.patch, kafka-840-after-commit-v2.patch,
kafka-840.patch, kafka-840-v2.patch
>
>
> If the admin/preferred_replica_election path is non-empty when a new controller starts,
the controller attempts to perform preferred replica election before the partition and replica
state machine have been initialized. In this case, the controller will try to make invalid
state transitions. 

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