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https://issues.apache.org/jira/browse/KAFKA-2721?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15007647#comment-15007647
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ASF GitHub Bot commented on KAFKA-2721:
---------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/kafka/pull/436
> Avoid handling duplicate LeaderAndISR requests
> ----------------------------------------------
>
> Key: KAFKA-2721
> URL: https://issues.apache.org/jira/browse/KAFKA-2721
> Project: Kafka
> Issue Type: Bug
> Reporter: Guozhang Wang
> Assignee: Dong Lin
> Fix For: 0.9.0.0
>
>
> Upon controller migration, the new controller will try to resend all the
> LeaderAndISR requests for any on-going partition reassignments. This can then
> lead to duplicate such requests sent to the same broker.
> Upon receiving such requests, today brokers do not detect if, for example, it
> is already the leader for the requested becoming-leader-partition, and does
> the logic such as 1) stop fetching 2) coordinator migration, etc which is not
> necessary.
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