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Date: Mon, 6 Feb 2012 23:29:02 +0000 (UTC)
From: "Hudson (Commented) (JIRA)" <jira@apache.org>
To: mapreduce-issues@hadoop.apache.org
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Subject: [jira] [Commented] (MAPREDUCE-3808) NPE in FileOutputCommitter when
 running a 0 reduce job
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    [ https://issues.apache.org/jira/browse/MAPREDUCE-3808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13201783#comment-13201783 ] 

Hudson commented on MAPREDUCE-3808:
-----------------------------------

Integrated in Hadoop-Mapreduce-trunk-Commit #1687 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk-Commit/1687/])
    MAPREDUCE-3808. Fixed an NPE in FileOutputCommitter for jobs with maps but no reduces. Contributed by Robert Joseph Evans.

vinodkv : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1241217
Files : 
* /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/FileOutputCommitter.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/output/FileOutputCommitter.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/java/org/apache/hadoop/mapred/TestFileOutputCommitter.java

                
> NPE in FileOutputCommitter when running a 0 reduce job
> ------------------------------------------------------
>
>                 Key: MAPREDUCE-3808
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3808
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.0, 0.24.0
>            Reporter: Siddharth Seth
>            Assignee: Robert Joseph Evans
>            Priority: Blocker
>             Fix For: 0.23.1
>
>         Attachments: MR-3808.txt
>
>
> This was while running LoadGen.
> {noformat}
> Error: java.lang.NullPointerException at org.apache.hadoop.fs.Path.<init>(Path.java:67) 
> at org.apache.hadoop.fs.Path.<init>(Path.java:56) 
> at org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter.getPendingJobAttemptsPath(FileOutputCommitter.java:118) 
> at org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter.getJobAttemptPath(FileOutputCommitter.java:167) 
> at org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter.getJobAttemptPath(FileOutputCommitter.java:149) 
> at org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter.getPendingTaskAttemptsPath(FileOutputCommitter.java:185) 
> at org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter.getTaskAttemptPath(FileOutputCommitter.java:209) 
> at org.apache.hadoop.mapred.FileOutputCommitter.getTaskAttemptPath(FileOutputCommitter.java:100) 
> at org.apache.hadoop.mapred.FileOutputCommitter.getTaskAttemptPath(FileOutputCommitter.java:94) 
> at org.apache.hadoop.mapred.FileOutputCommitter.needsTaskCommit(FileOutputCommitter.java:176) 
> at org.apache.hadoop.mapred.OutputCommitter.needsTaskCommit(OutputCommitter.java:248) 
> at org.apache.hadoop.mapred.Task.isCommitRequired(Task.java:955) 
> at org.apache.hadoop.mapred.Task.done(Task.java:912) 
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:331) 
> at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:147) 
> 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:1157) 
> at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:142)
> {noformat}

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