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https://issues.apache.org/jira/browse/YARN-1032?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vinod Kumar Vavilapalli updated YARN-1032:
------------------------------------------
Attachment: YARN-1032.3.patch
Same patch with logging fix.
> 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
> Assignee: Lohit Vijayarenu
> Priority: Critical
> Attachments: YARN-1032.1.patch, YARN-1032.2.patch, YARN-1032.3.patch
>
>
> 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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