[jira] [Created] (MAPREDUCE-5719) Potential null pointer access in AbstractYarnScheduler#getTransferredContainers()

["Ted Yu (JIRA)" <ji...@apache.org>]

Ted Yu created MAPREDUCE-5719:
---------------------------------

             Summary: Potential null pointer access in AbstractYarnScheduler#getTransferredContainers()
                 Key: MAPREDUCE-5719
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5719
             Project: Hadoop Map/Reduce
          Issue Type: Bug
            Reporter: Ted Yu


>From https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1666/console :
{code}
Tests run: 14, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 63.12 sec <<< FAILURE! - in org.apache.hadoop.mapreduce.v2.app.TestRMContainerAllocator
testCompletedTasksRecalculateSchedule(org.apache.hadoop.mapreduce.v2.app.TestRMContainerAllocator)  Time elapsed: 2.083 sec  <<< ERROR!
org.apache.hadoop.yarn.exceptions.YarnRuntimeException: java.lang.NullPointerException
	at org.apache.hadoop.yarn.server.resourcemanager.scheduler.AbstractYarnScheduler.getTransferredContainers(AbstractYarnScheduler.java:50)
	at org.apache.hadoop.yarn.server.resourcemanager.ApplicationMasterService.registerApplicationMaster(ApplicationMasterService.java:277)
	at org.apache.hadoop.mapreduce.v2.app.rm.RMCommunicator.register(RMCommunicator.java:154)
	at org.apache.hadoop.mapreduce.v2.app.TestRMContainerAllocator$MyContainerAllocator.register(TestRMContainerAllocator.java:1476)
	at org.apache.hadoop.mapreduce.v2.app.rm.RMCommunicator.serviceStart(RMCommunicator.java:112)
	at org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator.serviceStart(RMContainerAllocator.java:219)
	at org.apache.hadoop.service.AbstractService.start(AbstractService.java:193)
	at org.apache.hadoop.mapreduce.v2.app.TestRMContainerAllocator$MyContainerAllocator.<init>(TestRMContainerAllocator.java:1444)
	at org.apache.hadoop.mapreduce.v2.app.TestRMContainerAllocator$RecalculateContainerAllocator.<init>(TestRMContainerAllocator.java:1629)
	at org.apache.hadoop.mapreduce.v2.app.TestRMContainerAllocator.testCompletedTasksRecalculateSchedule(TestRMContainerAllocator.java:1665)
{code}
In above case getMasterContainer() returned null.

AbstractYarnScheduler#getTransferredContainers() should check such condition.



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