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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1032) NPE in RackResolve
Date Tue, 06 Aug 2013 16:16:48 GMT

    [ https://issues.apache.org/jira/browse/YARN-1032?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13730895#comment-13730895
] 

Hadoop QA commented on YARN-1032:
---------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12596360/YARN-1032.2.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 1 new or modified
test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-YARN-Build/1660//testReport/
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/1660//console

This message is automatically generated.
                
> 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
>         Attachments: YARN-1032.1.patch, YARN-1032.2.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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