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  1. Hadoop YARN
  2. YARN-2308

NPE happened when RM restart after CapacityScheduler queue configuration changed

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Critical
    • Resolution: Fixed
    • Affects Version/s: 2.6.0
    • Fix Version/s: 2.6.0
    • Component/s: resourcemanager, scheduler
    • Labels:
      None
    • Target Version/s:
    • Hadoop Flags:
      Reviewed

      Description

      I encountered a NPE when RM restart

      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)
      

      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.

        Attachments

        1. YARN-2308.1.patch
          8 kB
          Craig Welch
        2. YARN-2308.0.patch
          8 kB
          Craig Welch
        3. jira2308.patch
          6 kB
          Chang Li
        4. jira2308.patch
          7 kB
          Chang Li
        5. jira2308.patch
          6 kB
          Chang Li

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              • Assignee:
                lichangleo Chang Li
                Reporter:
                leftnoteasy Wangda Tan
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                Dates

                • Created:
                  Updated:
                  Resolved: