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Date: Fri, 22 Jul 2016 09:36:20 +0000 (UTC)
From: "Sunil G (JIRA)" <jira@apache.org>
To: yarn-issues@hadoop.apache.org
Message-ID: <JIRA.12975238.1464888540000.105512.1469180180711@Atlassian.JIRA>
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References: <JIRA.12975238.1464888540000@Atlassian.JIRA> <JIRA.12975238.1464888540117@arcas>
Subject: [jira] [Commented] (YARN-5195) RM intermittently crashed with NPE
 while handling APP_ATTEMPT_REMOVED event when async-scheduling enabled in
 CapacityScheduler
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archived-at: Fri, 22 Jul 2016 09:36:22 -0000


    [ https://issues.apache.org/jira/browse/YARN-5195?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15389219#comment-15389219 ] 

Sunil G commented on YARN-5195:
-------------------------------

Yes [~sandflee]. That make sense. 

> RM intermittently crashed with NPE while handling APP_ATTEMPT_REMOVED event when async-scheduling enabled in CapacityScheduler
> ------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-5195
>                 URL: https://issues.apache.org/jira/browse/YARN-5195
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.7.2
>            Reporter: Karam Singh
>            Assignee: sandflee
>         Attachments: YARN-5195.01.patch, YARN-5195.02.patch, YARN-5195.03.patch
>
>
> While running gridmix experiments one time came across incident where RM went down with following exception
> {noformat}
> 2016-05-28 15:45:24,459 [ResourceManager Event Processor] FATAL org.apache.hadoop.yarn.server.resourcemanager.ResourceManager: Error in handling event type APP_ATTEMPT_REMOVED to the scheduler
> java.lang.NullPointerException
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue.completedContainer(LeafQueue.java:1282)
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.completedContainerInternal(CapacityScheduler.java:1469)
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.AbstractYarnScheduler.completedContainer(AbstractYarnScheduler.java:497)
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.doneApplicationAttempt(CapacityScheduler.java:860)
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.handle(CapacityScheduler.java:1319)
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.handle(CapacityScheduler.java:127)
>         at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$SchedulerEventDispatcher$EventProcessor.run(ResourceManager.java:704)
>         at java.lang.Thread.run(Thread.java:745)
> 2016-05-28 15:45:24,460 [ApplicationMasterLauncher #49] INFO org.apache.hadoop.yarn.server.resourcemanager.amlauncher.AMLauncher: Cleaning master appattempt_1464449118385_0006_000001
> 2016-05-28 15:45:24,460 [ResourceManager Event Processor] INFO org.apache.hadoop.yarn.server.resourcemanager.ResourceManager: Exiting, bbye..
> {noformat}


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