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From "Karam Singh (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-3530) Sometimes NODE_UPDATE to the scheduler throws NPE causes scheduling to stop
Date Mon, 12 Dec 2011 05:38:30 GMT
Sometimes NODE_UPDATE to the scheduler throws NPE causes scheduling to stop
---------------------------------------------------------------------------

                 Key: MAPREDUCE-3530
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3530
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: mrv2, resourcemanager, scheduler
            Reporter: Karam Singh


Sometimes NODE_UPDATE to the scheduler throws NPE causes scheduling to stop but ResourceManager
keeps on running.
I have been observing intermitently for last 3 weeks.
But with latest svn code. I tried to run sort twice and both times Job got stuck due to NPE.
{code}
java.lang.NullPointerException
        at org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerApp.containerLaunchedOnNode(SchedulerApp.java:181)
        at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.containerLaunchedOnNode(CapacityScheduler.java:596)
        at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.nodeUpdate(CapacityScheduler.java:539)
        at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.handle(CapacityScheduler.java:617)
        at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.handle(CapacityScheduler.java:77)
        at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$SchedulerEventDispatcher$EventProcessor.run(ResourceManager.java:294)
        at java.lang.Thread.run(Thread.java:619)
{code}

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