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https://issues.apache.org/jira/browse/MAPREDUCE-925?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12748744#action_12748744
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Vinod K V commented on MAPREDUCE-925:
-------------------------------------
AFAIK this has always been like this. The test suite was never intended to be
running parallel tests as most of the test share the same temporary space.
Unless anyone objects, I'll close this as WON"T FIX.
> 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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