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https://issues.apache.org/jira/browse/YARN-8807?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16643638#comment-16643638
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Haibo Chen commented on YARN-8807:
----------------------------------
The unit test failures are all unrelated.
> FairScheduler crashes RM with oversubscription turned on if an application is
> killed.
> -------------------------------------------------------------------------------------
>
> Key: YARN-8807
> URL: https://issues.apache.org/jira/browse/YARN-8807
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: fairscheduler, resourcemanager
> Affects Versions: YARN-1011
> Reporter: Haibo Chen
> Assignee: Haibo Chen
> Priority: Major
> Attachments: YARN-8807-YARN-1011.00.patch,
> YARN-8807-YARN-1011.01.patch
>
>
> When an application, that has got opportunistic containers allocated, is
> killed, its containers are not released immediately.
> Fair scheduler would therefore continue to try to promote such orphaned
> containers, which results in NPE.
> {code:java}
> java.lang.NullPointerException
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.attemptToAssignReservedResourcesOrPromoteOpportunisticContainers(FairScheduler.java:1158)
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.attemptScheduling(FairScheduler.java:1129)
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.nodeUpdate(FairScheduler.java:1001)
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.handle(FairScheduler.java:1275)
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.TestFairScheduler.testKillingApplicationWithOpportunisticContainersAssigned(TestFairScheduler.java:4019){code}
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