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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-2174) distcp throws a NullPointerException in the close() method of mapper class due to the Reporter becoming invalid
Date Fri, 09 Nov 2007 01:40:50 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2174?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12541197
] 

Hadoop QA commented on HADOOP-2174:
-----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
http://issues.apache.org/jira/secure/attachment/12369203/2174.patch
against trunk revision r592860.

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

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

    javac +1.  The applied patch does not generate any new compiler warnings.

    findbugs +1.  The patch does not introduce any new Findbugs warnings.

    core tests -1.  The patch failed core unit tests.

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

Test results: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/1076/testReport/
Findbugs warnings: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/1076/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/1076/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/1076/console

This message is automatically generated.

> distcp throws a NullPointerException in the close() method of mapper class due to the
Reporter becoming invalid
> ---------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-2174
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2174
>             Project: Hadoop
>          Issue Type: Bug
>          Components: util
>    Affects Versions: 0.15.0
>            Reporter: Riccardo
>            Priority: Critical
>             Fix For: 0.15.1
>
>         Attachments: 2174-1.patch
>
>
> distcp occasionally throws a NullPointerException in the close() method of the mapper
class, when the copy of the Reporter handle becomes invalid:
> java.lang.NullPointerException
>        at org.apache.hadoop.util.CopyFiles$FSCopyFilesMapper.updateStatus(CopyFiles.java:242)
>        at org.apache.hadoop.util.CopyFiles$FSCopyFilesMapper.close(CopyFiles.java:402)
>        at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:53)
>        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:192)
>        at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1760)
> This can easily be fixed by checking whether the Reporter is null before updating the
status. Also, the status could be updated once the invocation of copy(srcstat, dstpath, out,
reporter); returns on line 373 of CopyFiles.java. Marking this as critical for a 0.15.1 release
as Chris requested.

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