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From "Vinod K V (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-925) Not able to run parallel instances of ant tests
Date Tue, 01 Sep 2009 03:51:32 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-925?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12749748#action_12749748
] 

Vinod K V commented on MAPREDUCE-925:
-------------------------------------

Another work-around occurred to me. If we can modify the build file so that each test can
pass its own build.test.data directory from the command line, we can run parallel instances
each pointing to a different temporary directory. Would that work?

> Not able to run parallel instances of ant tests
> -----------------------------------------------
>
>                 Key: MAPREDUCE-925
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-925
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: test
>    Affects Versions: 0.20.1
>            Reporter: Suman Sehgal
>            Priority: Minor
>
> Not able to execute two or more parallel instances of ant test.
> Scenario:
> =======
> Executed  "TestRecoveryManager" in a loop for 100 times and ran some other tests in parallel.
Encountered following error message in TestRecoveryManager logs:
> [junit] 2009-08-27 10:53:48,724 INFO  mapred.TaskTracker (TaskTracker.java:tryToGetOutputSize(1594))
- org.apache.hadoop.util.DiskChecker$DiskErrorException: Could not find taskTracker/jobcache/<job-id>/<attempt-id>/output/file.out
in any of the configured local directories
> It seems that new ant test removes the existing mapred local directory itself  and recreates
it for current test.

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