[jira] Commented: (MAPREDUCE-1744) DistributedCache creates its own FileSytem instance when adding a file/archive to the path

["Hadoop QA (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1744?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12876550#action_12876550 ] 

Hadoop QA commented on MAPREDUCE-1744:
--------------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12446558/mapred-1744-1.patch
  against trunk revision 952460.

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

    +1 tests included.  The patch appears to include 3 new or modified tests.

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

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

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

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

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

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

Test results: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h4.grid.sp2.yahoo.net/228/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h4.grid.sp2.yahoo.net/228/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h4.grid.sp2.yahoo.net/228/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h4.grid.sp2.yahoo.net/228/console

This message is automatically generated.

> DistributedCache creates its own FileSytem instance when adding a file/archive to the path
> ------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-1744
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1744
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Dick King
>            Assignee: Krishna Ramachandran
>         Attachments: BZ-3503564--2010-05-06.patch, h1744.patch, mapred-1744-1.patch, mapred-1744.patch, MAPREDUCE-1744.patch
>
>
> According to the contract of {{UserGroupInformation.doAs()}} the only required operations within the {{doAs()}} block are the
> creation of a {{JobClient}} or getting a {{FileSystem}} .
> The {{DistributedCache.add(File/Archive)ToClasspath()}} methods create a {{FileSystem}} instance outside of the {{doAs()}} block,
> this {{FileSystem}} instance is not in the scope of the proxy user but of the superuser and permissions may make the method
> fail.
> One option is to overload the methods above to receive a filesystem.
> Another option is to do obtain the {{FileSystem}} within a {{doAs()}} block, for this it would be required to have the proxy
> user set in the passed configuration.
> The second option seems nicer, but I don't know if the proxy user is as a property in the jobconf.

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