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https://issues.apache.org/jira/browse/HADOOP-2735?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12566831#action_12566831
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Hadoop QA commented on HADOOP-2735:
-----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
http://issues.apache.org/jira/secure/attachment/12374957/patch-2735.txt
against trunk revision 619499.

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

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

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

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

    release audit +1.  The applied patch does not generate any new release 
audit warnings.

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

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

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

Test results: 
http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1756/testReport/
Findbugs warnings: 
http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1756/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: 
http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1756/artifact/trunk/build/test/checkstyle-errors.html
Console output: 
http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1756/console

This message is automatically generated.

> Setting default tmp directory for java createTempFile (java.io.tmpdir)
> ----------------------------------------------------------------------
>
>                 Key: HADOOP-2735
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2735
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: mapred
>            Reporter: Koji Noguchi
>            Assignee: Amareshwari Sri Ramadasu
>            Priority: Critical
>             Fix For: 0.16.1
>
>         Attachments: patch-2735.txt, patch-2735.txt
>
>
> On our cluster, we've seen Pig(http://incubator.apache.org/pig/) filling up 
> the /tmp and failing. 
> (also inefficient since all the local tasks were spilling to the  same disk)
> Pig is simply using java api createTempFile, 
> http://java.sun.com/j2se/1.5.0/docs/api/java/io/File.html#createTempFile(java.lang.String,%20java.lang.String,%20java.io.File
> Can we add -Djava.io.tmpdir="./tmp" somewhere ?
> so that, 
> 1) Tasks can utilize all disks when using tmp
> 2) Any undeleted tmp files will be deleted by the tasktracker when task(job?) 
> is done.
> The easiest way is to set it inside mapred.child.java.opts in the config, but 
> this can be overwritten if the users set their own task heapsize.

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