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https://issues.apache.org/jira/browse/KAFKA-840?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13617919#comment-13617919
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Swapnil Ghike commented on KAFKA-840:
-------------------------------------
1. Renamed inShuttingdown in partition/replica state machines to isRunning,
because the former does not let us distinguish between a state machine that has
not started, and a state machine that has started and is not shutting down.
Made changes at other places accordingly.
2. With this patch, if the state machine has not started, then
handleStateChange() throws a StateChangeFailedException with a message "because
the state machine has not started".
> 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
> Affects Versions: 0.8
> Reporter: Swapnil Ghike
> Assignee: Swapnil Ghike
> Priority: Blocker
> Labels: bugs
> Fix For: 0.8
>
> Attachments: kafka-840.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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