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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4279) getClusterStatus() fails with null pointer exception when running jobs in local mode
Date Fri, 25 May 2012 06:44:25 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4279?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13283162#comment-13283162

Hadoop QA commented on MAPREDUCE-4279:

+1 overall.  Here are the results of testing the latest attachment 
  against trunk revision .

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 1 new or modified test files.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 eclipse:eclipse.  The patch built with eclipse:eclipse.

    +1 findbugs.  The patch does not introduce any new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit

    +1 core tests.  The patch passed unit tests in hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common.

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2417//testReport/
Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2417//console

This message is automatically generated.
> getClusterStatus() fails with null pointer exception when running jobs in local mode
> ------------------------------------------------------------------------------------
>                 Key: MAPREDUCE-4279
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4279
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: jobtracker
>    Affects Versions: 0.23.1, 2.0.0-alpha, 3.0.0
>            Reporter: Rahul Jain
>            Assignee: Devaraj K
>         Attachments: MAPREDUCE-4279.patch
> While migrating code from 0.20.2 hadoop codebase to 0.23.1 we encountered this issue
for jobs run in local mode of execution:
> {code}
> java.lang.NullPointerException
> 	at org.apache.hadoop.mapred.JobClient.arrayToStringList(JobClient.java:783)
> 	at org.apache.hadoop.mapred.JobClient.access$600(JobClient.java:138)
> 	at org.apache.hadoop.mapred.JobClient$4.run(JobClient.java:815)
> 	at org.apache.hadoop.mapred.JobClient$4.run(JobClient.java:812)
> 	at java.security.AccessController.doPrivileged(Native Method)
> 	at javax.security.auth.Subject.doAs(Subject.java:396)
> 	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1177)
> 	at org.apache.hadoop.mapred.JobClient.getClusterStatus(JobClient.java:812)
> {code}
> We are using cloudera distribution CDH4b2 for testing, however the underlying code is
0.23.1 and I could see no difference in this implementation.

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