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https://issues.apache.org/jira/browse/YARN-8470?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16947163#comment-16947163
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Steven Rand commented on YARN-8470:
-----------------------------------
Hi [~snemeth], [~szegedim],
Friendly ping on this ticket. We've hit this issue in a production cluster
running 3.2.1.
> Fair scheduler exception with SLS
> ---------------------------------
>
> Key: YARN-8470
> URL: https://issues.apache.org/jira/browse/YARN-8470
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Miklos Szegedi
> Assignee: Szilard Nemeth
> Priority: Major
>
> I ran into the following exception with sls:
> 2018-06-26 13:34:04,358 ERROR resourcemanager.ResourceManager: Received
> RMFatalEvent of type CRITICAL_THREAD_CRASH, caused by a critical thread,
> FSPreemptionThread, that exited unexpectedly: java.lang.NullPointerException
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FSPreemptionThread.identifyContainersToPreemptOnNode(FSPreemptionThread.java:207)
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FSPreemptionThread.identifyContainersToPreemptForOneContainer(FSPreemptionThread.java:161)
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FSPreemptionThread.identifyContainersToPreempt(FSPreemptionThread.java:121)
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FSPreemptionThread.run(FSPreemptionThread.java:81)
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