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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-2427) Cleanup of mapred.local.dir after maptask is complete
Date Mon, 02 Jun 2008 09:15:45 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2427?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12601559#action_12601559
] 

Hadoop QA commented on HADOOP-2427:
-----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12382994/patch-2427.txt
  against trunk revision 661918.

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

    -1 tests included.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no tests are needed for this patch.

    +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/Hadoop-Patch/2534/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2534/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2534/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2534/console

This message is automatically generated.

> Cleanup of mapred.local.dir after maptask is complete
> -----------------------------------------------------
>
>                 Key: HADOOP-2427
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2427
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.15.1
>            Reporter: lohit vijayarenu
>            Assignee: Amareshwari Sriramadasu
>             Fix For: 0.18.0
>
>         Attachments: patch-2427.txt, patch-2427.txt
>
>
> I see that after a map task is complete, its working directory (mapred.local.dir)/taskTracker/jobcache/<jobid>/<task_dir>
is not deleted untill the job is complete. If map out files are stored in there, could this
be created in different directory and the working directory cleaned up after map task is complete.
One problem we are seeing is, if a map task creates files temporary files, they get accumulated
and we may run out of disk space thus failing the job. Relying on the user to cleanup all
temp files created is be error prone.  

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