[jira] [Created] (MAPREDUCE-5598) TestUserDefinedCounters.testMapReduceJob is flakey

["Robert Kanter (JIRA)" <ji...@apache.org>]

Robert Kanter created MAPREDUCE-5598:
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             Summary: TestUserDefinedCounters.testMapReduceJob is flakey
                 Key: MAPREDUCE-5598
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5598
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: test
    Affects Versions: 2.2.0
            Reporter: Robert Kanter
            Assignee: Robert Kanter


{{TestUserDefinedCounters.testMapReduceJob}} is flakey.  

We sometimes see it fail:
{noformat}
junit.framework.AssertionFailedError
	at junit.framework.Assert.fail(Assert.java:48)
	at junit.framework.Assert.assertTrue(Assert.java:20)
	at junit.framework.Assert.assertTrue(Assert.java:27)
	at org.apache.hadoop.mapred.TestUserDefinedCounters.testMapReduceJob(TestUserDefinedCounters.java:113)
{noformat}

Upon investigation, the problem is that the input for the MR job in this test is at {{System.getProperty("test.build.data", "/tmp") + "/input"}}.  If an earlier test wrote some files there, this test will use them as part of its input.  This can cause all sorts of problems with this test because its not expecting the additional input data.



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