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Steve Loughran commented on MAPREDUCE-925: ------------------------------------------ There is a way to run tests in parallel using vmware, virtualbox or equivalent: have a VM run the tests off a mounted copy of the files. To get things to work best, set build.dir to something local, so that generated results on one VM don't interfere with the others. > 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. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.