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https://issues.apache.org/jira/browse/YARN-9618?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17313105#comment-17313105
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Peter Bacsko commented on YARN-9618:
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Thanks for the patch [~zhuqi] and [~gandras] for the review, I committed this
to trunk.
> NodesListManager event improvement
> ----------------------------------
>
> Key: YARN-9618
> URL: https://issues.apache.org/jira/browse/YARN-9618
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Bibin Chundatt
> Assignee: Qi Zhu
> Priority: Critical
> Fix For: 3.4.0
>
> Attachments: YARN-9618.001.patch, YARN-9618.002.patch,
> YARN-9618.003.patch, YARN-9618.004.patch, YARN-9618.005.patch,
> YARN-9618.006.patch, YARN-9618.007.patch
>
>
> Current implementation nodelistmanager event blocks async dispacher and can
> cause RM crash and slowing down event processing.
> # Cluster restart with 1K running apps . Each usable event will create 1K
> events over all events could be 5k*1k events for 5K cluster
> # Event processing is blocked till new events are added to queue.
> Solution :
> # Add another async Event handler similar to scheduler.
> # Instead of adding events to dispatcher directly call RMApp event handler.
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