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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1568) TrackerDistributedCacheManager should clean up cache in a background thread
Date Wed, 28 Apr 2010 02:52:34 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12861653#action_12861653
] 

Hadoop QA commented on MAPREDUCE-1568:
--------------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12443005/MAPREDUCE-1568-v3.txt
  against trunk revision 938576.

    +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/149/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h4.grid.sp2.yahoo.net/149/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h4.grid.sp2.yahoo.net/149/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h4.grid.sp2.yahoo.net/149/console

This message is automatically generated.

> TrackerDistributedCacheManager should clean up cache in a background thread
> ---------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-1568
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1568
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>    Affects Versions: 0.22.0
>            Reporter: Scott Chen
>            Assignee: Scott Chen
>             Fix For: 0.22.0
>
>         Attachments: MAPREDUCE-1568-v2.1.txt, MAPREDUCE-1568-v2.txt, MAPREDUCE-1568-v3.txt,
MAPREDUCE-1568.txt
>
>
> Right now the TrackerDistributedCacheManager do the clean up with the following code
path:
> {code}
> TaskRunner.run() -> 
> TrackerDistributedCacheManager.setup() ->
> TrackerDistributedCacheManager.getLocalCache() -> 
> TrackerDistributedCacheManager.deleteCache()
> {code}
> The deletion of the cache files can take a long time and it should not be done by a task.
We suggest that there should be a separate thread checking and clean up the cache files.

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