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https://issues.apache.org/jira/browse/KAFKA-911?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13664277#comment-13664277
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Neha Narkhede commented on KAFKA-911:
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testShutdownBroker() testcase in AdminTest will fail with this patch since it
assumes that the controlled shutdown logic will shrink the ISR proactively. I
will fix the test if the changes in this patch of not shrinking the ISR are
acceptable.
> Bug in controlled shutdown logic in controller leads to controller not
> sending out some state change request
> -------------------------------------------------------------------------------------------------------------
>
> Key: KAFKA-911
> URL: https://issues.apache.org/jira/browse/KAFKA-911
> Project: Kafka
> Issue Type: Bug
> Components: controller
> Affects Versions: 0.8
> Reporter: Neha Narkhede
> Assignee: Neha Narkhede
> Priority: Blocker
> Labels: kafka-0.8, p1
> Attachments: kafka-911-v1.patch
>
>
> The controlled shutdown logic in the controller first tries to move the
> leaders from the broker being shutdown. Then it tries to remove the broker
> from the isr list. During that operation, it does not synchronize on the
> controllerLock. This causes a race condition while dispatching data using the
> controller's channel manager.
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