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Date: Fri, 10 Feb 2012 04:25:59 +0000 (UTC)
From: "Ahmed Radwan (Commented) (JIRA)" <jira@apache.org>
To: mapreduce-issues@hadoop.apache.org
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Subject: [jira] [Commented] (MAPREDUCE-3844) Problem in setting the
 childTmpDir in MapReduceChildJVM
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    [ https://issues.apache.org/jira/browse/MAPREDUCE-3844?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13205217#comment-13205217 ] 

Ahmed Radwan commented on MAPREDUCE-3844:
-----------------------------------------

I did further testing and to compare this behavior on cdh, and I am seeing conflicting results for another test job which is not throwing this exception. So please hold on this patch until I confirm what is happening. 
                
> Problem in setting the childTmpDir in MapReduceChildJVM
> -------------------------------------------------------
>
>                 Key: MAPREDUCE-3844
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3844
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.0, 0.23.1
>            Reporter: Ahmed Radwan
>            Assignee: Ahmed Radwan
>            Priority: Blocker
>         Attachments: MAPREDUCE-3844.patch, MAPREDUCE-3844_rev2.patch
>
>
> We have seen this issue during a Hive test. Where Hive tries to create a temp file using File.createTempFile(..) and it throws:
> {code}
> Exception in thread "main" java.io.IOException: No such file or directory
> 	at java.io.UnixFileSystem.createFileExclusively(Native Method)
> 	at java.io.File.checkAndCreate(File.java:1704)
> 	at java.io.File.createTempFile(File.java:1792)
> 	at java.io.File.createTempFile(File.java:1828)
> 	at Test.main(Test.java:13)
> {code}
> Because it literally sees "$PWD/tmp" as the temp directory path.
> $PWD need to be evaluated before being used in setting the property "java.io.tmpdir" in MapReduceChildJVM.java.

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