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From "shenhong (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-301) Fairscheduler appear to concurrentModificationException and RM crash
Date Tue, 01 Jan 2013 06:02:12 GMT

     [ https://issues.apache.org/jira/browse/YARN-301?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

shenhong updated YARN-301:
--------------------------

    Attachment: YARN-301.patch

add a patch to solve this problem
                
> Fairscheduler appear to concurrentModificationException and RM crash
> --------------------------------------------------------------------
>
>                 Key: YARN-301
>                 URL: https://issues.apache.org/jira/browse/YARN-301
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager, scheduler
>            Reporter: shenhong
>             Fix For: 2.0.3-alpha
>
>         Attachments: 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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