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https://issues.apache.org/jira/browse/MAPREDUCE-925?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12749747#action_12749747
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Vinod K V commented on MAPREDUCE-925:
-------------------------------------
Most of the mapred tests write their temporary files to build.test.data which
is set by the build file to ${build-dir}/test/data. In that sense, though it is
not hard-coded in the tests themselves, it is kind of fixed.
Further many tests don't create _sub-directories_ inside ${build.test.data}
directory, assume that this directory itself is empty and create files directly
under ${build.test.data}. Though it is possible to fix this, it is huge task
given the number of tests that need to be modified. If it is really felt to be
worth pursuing, we can open separate issues to fix tests one by one.
> Not able to run parallel instances of ant tests
> -----------------------------------------------
>
> Key: MAPREDUCE-925
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-925
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: test
> Affects Versions: 0.20.1
> Reporter: Suman Sehgal
> Priority: Minor
>
> Not able to execute two or more parallel instances of ant test.
> Scenario:
> =======
> Executed "TestRecoveryManager" in a loop for 100 times and ran some other
> tests in parallel. Encountered following error message in TestRecoveryManager
> logs:
> [junit] 2009-08-27 10:53:48,724 INFO mapred.TaskTracker
> (TaskTracker.java:tryToGetOutputSize(1594)) -
> org.apache.hadoop.util.DiskChecker$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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