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https://issues.apache.org/jira/browse/YARN-4980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16303252#comment-16303252
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stefanlee commented on YARN-4980:
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[~chenfolin] hi,have you resolved this problem, or optimized it?
> SchedulerEventDispatcher should not process by only a single EventProcessor
> thread
> ----------------------------------------------------------------------------------
>
> Key: YARN-4980
> URL: https://issues.apache.org/jira/browse/YARN-4980
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager
> Affects Versions: 2.5.0, 2.6.4
> Environment: 1 resourcemanager
> 500 nodemanager
> nodemanager heartbeat interval is 3 secs.
> Reporter: ChenFolin
>
> I think only a single EventProcessor thread in SchedulerEventDispatcher to
> process event is unreasonable.
> I often see "Size of scheduler event-queue is 1000(2000..)..." at the
> resourcemanager log.
> Now I have 500 nodemanager , event process is slowly. If I add another 200
> nodemanagers , the situation will badly.
> ... so,can node events(node add/delete/update...) processed by multi threads?
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