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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5833) TestRMContainerAllocator fails ocassionally
Date Tue, 15 Apr 2014 18:31:20 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5833?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13969867#comment-13969867
] 

Chris Nauroth commented on MAPREDUCE-5833:
------------------------------------------

Hi, [~zjshen].  Thanks for fixing this.

For draining the event queue, could you please use {{GenericTestUtils#waitFor}}?  Right now,
if we had a bug such that the event queue wasn't getting fully drained, then this test would
go into an infinite loop.  If instead we use {{GenericTestUtils#waitFor}}, then the test will
fail after some maximum wait time and give us a thread dump to help with diagnosis.

> TestRMContainerAllocator fails ocassionally
> -------------------------------------------
>
>                 Key: MAPREDUCE-5833
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5833
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Zhijie Shen
>            Assignee: Zhijie Shen
>         Attachments: MAPREDUCE-5833.1.patch
>
>
> testReportedAppProgress and testReportedAppProgressWithOnlyMaps have race conditions.
> {code}
> Stacktrace
> java.util.NoSuchElementException: null
> 	at java.util.Collections$EmptyIterator.next(Collections.java:2998)
> 	at org.apache.hadoop.mapreduce.v2.app.TestRMContainerAllocator.testReportedAppProgress(TestRMContainerAllocator.java:535)
> {code}
> {code}
> Error Message
> Task state is not correct (timedout) expected:<RUNNING> but was:<SCHEDULED>
> Stacktrace
> junit.framework.AssertionFailedError: Task state is not correct (timedout) expected:<RUNNING>
but was:<SCHEDULED>
> 	at junit.framework.Assert.fail(Assert.java:50)
> 	at junit.framework.Assert.failNotEquals(Assert.java:287)
> 	at junit.framework.Assert.assertEquals(Assert.java:67)
> 	at org.apache.hadoop.mapreduce.v2.app.MRApp.waitForState(MRApp.java:393)
> 	at org.apache.hadoop.mapreduce.v2.app.TestRMContainerAllocator.testReportedAppProgressWithOnlyMaps(TestRMContainerAllocator.java:700)
> {code}



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