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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-301) Fair scheduler throws ConcurrentModificationException when iterating over app's priorities
Date Fri, 04 Jan 2013 14:04:20 GMT

    [ https://issues.apache.org/jira/browse/YARN-301?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13543901#comment-13543901
] 

Hudson commented on YARN-301:
-----------------------------

Integrated in Hadoop-Mapreduce-trunk #1305 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1305/])
    YARN-301. Fair scheduler throws ConcurrentModificationException when iterating over app's
priorities. Contributed by Sandy Ryza. (Revision 1428400)

     Result = SUCCESS
tomwhite : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1428400
Files : 
* /hadoop/common/trunk/hadoop-yarn-project/CHANGES.txt
* /hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/AppSchedulable.java

                
> Fair scheduler throws ConcurrentModificationException when iterating over app's priorities
> ------------------------------------------------------------------------------------------
>
>                 Key: YARN-301
>                 URL: https://issues.apache.org/jira/browse/YARN-301
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager, scheduler
>    Affects Versions: 2.0.2-alpha
>            Reporter: shenhong
>            Assignee: shenhong
>             Fix For: 2.0.3-alpha
>
>         Attachments: YARN-301.patch, YARN-301.patch
>
>
> In my test cluster, fairscheduler appear to concurrentModificationException and RM crash,
 here is the message:
> 2012-12-30 17:14:17,171 FATAL org.apache.hadoop.yarn.server.resourcemanager.ResourceManager:
Error in handling event type NODE_UPDATE to the scheduler
> java.util.ConcurrentModificationException
>         at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1100)
>         at java.util.TreeMap$KeyIterator.next(TreeMap.java:1154)
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.AppSchedulable.assignContainer(AppSchedulable.java:297)
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FSLeafQueue.assignContainer(FSLeafQueue.java:181)
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.nodeUpdate(FairScheduler.java:780)
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.handle(FairScheduler.java:842)
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.handle(FairScheduler.java:98)
>         at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$SchedulerEventDispatcher$EventProcessor.run(ResourceManager.java:340)
>         at java.lang.Thread.run(Thread.java:662)

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