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From "Lohit Vijayarenu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-1032) NPE in RackResolve
Date Mon, 05 Aug 2013 21:10:48 GMT
Lohit Vijayarenu created YARN-1032:
--------------------------------------

             Summary: NPE in RackResolve
                 Key: YARN-1032
                 URL: https://issues.apache.org/jira/browse/YARN-1032
             Project: Hadoop YARN
          Issue Type: Bug
    Affects Versions: 2.0.5-alpha
         Environment: linux
            Reporter: Lohit Vijayarenu
            Priority: Minor


We found a case where our rack resolve script was not returning rack due to problem with resolving
host address. This exception was see in RackResolver.java as NPE, ultimately caught in RMContainerAllocator.


{noformat}
2013-08-01 07:11:37,708 ERROR [RMCommunicator Allocator] org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator:
ERROR IN CONTACTING RM. 
java.lang.NullPointerException
	at org.apache.hadoop.yarn.util.RackResolver.coreResolve(RackResolver.java:99)
	at org.apache.hadoop.yarn.util.RackResolver.resolve(RackResolver.java:92)
	at org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator$ScheduledRequests.assignMapsWithLocality(RMContainerAllocator.java:1039)
	at org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator$ScheduledRequests.assignContainers(RMContainerAllocator.java:925)
	at org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator$ScheduledRequests.assign(RMContainerAllocator.java:861)
	at org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator$ScheduledRequests.access$400(RMContainerAllocator.java:681)
	at org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator.heartbeat(RMContainerAllocator.java:219)
	at org.apache.hadoop.mapreduce.v2.app.rm.RMCommunicator$1.run(RMCommunicator.java:243)
	at java.lang.Thread.run(Thread.java:722)

{noformat}

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