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https://issues.apache.org/jira/browse/YARN-270?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thomas Graves reassigned YARN-270:
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Assignee: Thomas Graves
> RM scheduler event handler thread gets behind
> ---------------------------------------------
>
> Key: YARN-270
> URL: https://issues.apache.org/jira/browse/YARN-270
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager
> Affects Versions: 0.23.5
> Reporter: Thomas Graves
> Assignee: Thomas Graves
>
> We had a couple of incidents on a 2800 node cluster where the RM scheduler
> event handler thread got behind processing events and basically become
> unusable. It was still processing apps, but taking a long time (1 hr 45
> minutes) to accept new apps. this actually happened twice within 5 days.
> We are using the capacity scheduler and at the time had between 400 and 500
> applications running. There were another 250 apps that were in the SUBMITTED
> state in the RM but the scheduler hadn't processed those to put in pending
> state yet. We had about 15 queues none of them hierarchical. We also had
> plenty of space lefts on the cluster.
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