Lohit Vijayarenu created YARN-1032:
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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)
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