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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1538) TrackerDistributedCacheManager can fail because the number of subdirectories reaches system limit
Date Tue, 02 Mar 2010 23:38:27 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1538?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12840386#action_12840386
] 

Hadoop QA commented on MAPREDUCE-1538:
--------------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12437300/MAPREDUCE-1538.patch
  against trunk revision 918037.

    +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 passed contrib unit tests.

Test results: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h4.grid.sp2.yahoo.net/13/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h4.grid.sp2.yahoo.net/13/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h4.grid.sp2.yahoo.net/13/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h4.grid.sp2.yahoo.net/13/console

This message is automatically generated.

> TrackerDistributedCacheManager can fail because the number of subdirectories reaches
system limit
> -------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-1538
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1538
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: tasktracker
>    Affects Versions: 0.22.0
>            Reporter: Scott Chen
>            Assignee: Scott Chen
>             Fix For: 0.22.0
>
>         Attachments: MAPREDUCE-1538.patch
>
>
> TrackerDistributedCacheManager deletes the cached files when the size goes up to a configured
number.
> But there is no such limit for the number of subdirectories. Therefore the number of
subdirectories may grow large and exceed system limit.
> This will make TT cannot create directory when getLocalCache and fails the tasks.

-- 
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