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https://issues.apache.org/jira/browse/KAFKA-6146?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16245030#comment-16245030
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ASF GitHub Bot commented on KAFKA-6146:
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Github user asfgit closed the pull request at:
https://github.com/apache/kafka/pull/4189
> minimize the number of triggers enqueuing PreferredReplicaLeaderElection
> events
> -------------------------------------------------------------------------------
>
> Key: KAFKA-6146
> URL: https://issues.apache.org/jira/browse/KAFKA-6146
> Project: Kafka
> Issue Type: Sub-task
> Affects Versions: 1.1.0
> Reporter: Jun Rao
> Assignee: Onur Karaman
> Fix For: 1.1.0
>
>
> We currently enqueue a PreferredReplicaLeaderElection controller event in
> PreferredReplicaElectionHandler's handleCreation, handleDeletion, and
> handleDataChange. We can just enqueue the event upon znode creation and after
> preferred replica leader election completes. The processing of this latter
> enqueue will register the exist watch on PreferredReplicaElectionZNode and
> perform any pending preferred replica leader election that may have occurred
> between completion and registration.
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