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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-2308) NPE happened when RM restart after CapacityScheduler queue configuration changed
Date Thu, 17 Jul 2014 10:03:04 GMT
Wangda Tan created YARN-2308:
--------------------------------

             Summary: NPE happened when RM restart after CapacityScheduler queue configuration
changed 
                 Key: YARN-2308
                 URL: https://issues.apache.org/jira/browse/YARN-2308
             Project: Hadoop YARN
          Issue Type: Bug
          Components: resourcemanager, scheduler
    Affects Versions: 2.6.0
            Reporter: Wangda Tan


I encountered a NPE when RM restart
{code}
2014-07-16 07:22:46,957 FATAL org.apache.hadoop.yarn.server.resourcemanager.ResourceManager:
Error in handling event type APP_ATTEMPT_ADDED to the scheduler
java.lang.NullPointerException
        at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.addApplicationAttempt(CapacityScheduler.java:566)
        at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.handle(CapacityScheduler.java:922)
        at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.handle(CapacityScheduler.java:98)
        at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$SchedulerEventDispatcher$EventProcessor.run(ResourceManager.java:594)
        at org.apache.hadoop.yarn.state.StateMachineFactory.access$300(StateMachineFactory.java:46)
        at org.apache.hadoop.yarn.state.StateMachineFactory$InternalStateMachine.doTransition(StateMachineFactory.java:448)
        at org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppImpl.handle(RMAppImpl.java:654)
        at org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppImpl.handle(RMAppImpl.java:85)
        at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$ApplicationEventDispatcher.handle(ResourceManager.java:698)
        at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$ApplicationEventDispatcher.handle(ResourceManager.java:682)
        at org.apache.hadoop.yarn.event.AsyncDispatcher.dispatch(AsyncDispatcher.java:173)
        at org.apache.hadoop.yarn.event.AsyncDispatcher$1.run(AsyncDispatcher.java:106)
        at java.lang.Thread.run(Thread.java:744)
{code}
And RM will be failed to restart.

This is caused by queue configuration changed, I removed some queues and added new queues.
So when RM restarts, it tries to recover history applications, and when any of queues of these
applications removed, NPE will be raised.



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