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From "madhukara phatak (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-4234) SortValidator.java is incompatible with multi-user or parallel use (due to a /tmp file with static name)
Date Fri, 18 May 2012 13:57:07 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-4234?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

madhukara phatak updated MAPREDUCE-4234:
----------------------------------------

    Affects Version/s: trunk
               Status: Patch Available  (was: Open)
    
> 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
>            Priority: Minor
>         Attachments: MAPREDUCE-4234.patch
>
>
> 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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