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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4234) SortValidator.java is incompatible with multi-user or parallel use (due to a /tmp file with static name)
Date Wed, 01 Aug 2012 12:50:08 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13426572#comment-13426572
] 

Hudson commented on MAPREDUCE-4234:
-----------------------------------

Integrated in Hadoop-Hdfs-0.23-Build #331 (See [https://builds.apache.org/job/Hadoop-Hdfs-0.23-Build/331/])
    svn merge -c 1367789 FIXES: MAPREDUCE-4234. SortValidator.java is incompatible with multi-user
or parallel use (due to a /tmp file with static name) (Robert Evans via jeagles) (Revision
1367795)

     Result = SUCCESS
jeagles : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1367795
Files : 
* /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/CHANGES.txt
* /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/SortValidator.java
* /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/src/test/mapred/org/apache/hadoop/mapred/SortValidator.java

                
> SortValidator.java is incompatible with multi-user or parallel use (due to a /tmp file
with static name)
> --------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-4234
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4234
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: examples
>    Affects Versions: 0.23.3, trunk
>            Reporter: Randy Clayton
>            Assignee: Robert Joseph Evans
>            Priority: Minor
>         Attachments: MAPREDUCE-4234.patch, MR-4234.txt, MR-4234.txt
>
>
> The SortValidator.java file checkRecords method creates a file in the /tmp/sortvalidator
directory using a static filename. This can result in failures due to name collisions when
the hadoop-mapreduce-client-jobclient-*-tests jar is used by more than one task or one user
simultaneously. We use this jar when testing compression codecs and after we started running
tests in parallel (four at a time to reduce overall test time) we started experiencing random
test failures due to name collisions. Creating a random or unique per thread filename may
resolve this issue. We have developed a change to introduce per use unique file names. 

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