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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4924) flakey test: org.apache.hadoop.mapred.TestClusterMRNotification.testMR
Date Wed, 16 Jan 2013 14:06:21 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4924?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13555053#comment-13555053
] 

Hudson commented on MAPREDUCE-4924:
-----------------------------------

Integrated in Hadoop-Mapreduce-trunk #1315 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1315/])
    MAPREDUCE-4924. flakey test: org.apache.hadoop.mapred.TestClusterMRNotification.testMR.
(rkanter via tucu) (Revision 1433753)

     Result = FAILURE
tucu : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1433753
Files : 
* /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/NotificationTestCase.java

                
> flakey test: org.apache.hadoop.mapred.TestClusterMRNotification.testMR
> ----------------------------------------------------------------------
>
>                 Key: MAPREDUCE-4924
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4924
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv1
>    Affects Versions: 2.0.2-alpha
>            Reporter: Robert Kanter
>            Assignee: Robert Kanter
>            Priority: Trivial
>             Fix For: 1.2.0, 2.0.3-alpha
>
>         Attachments: MAPREDUCE-4924_branch-1.patch, MAPREDUCE-4924_branch-1.patch, MAPREDUCE-4924.patch,
MAPREDUCE-4924.patch
>
>
> I occasionally get a failure like this on {{org.apache.hadoop.mapred.TestClusterMRNotification.testMR}}
> {code}
> junit.framework.AssertionFailedError: expected:<6> but was:<4>
> 	at junit.framework.Assert.fail(Assert.java:47)
> 	at junit.framework.Assert.failNotEquals(Assert.java:283)
> 	at junit.framework.Assert.assertEquals(Assert.java:64)
> 	at junit.framework.Assert.assertEquals(Assert.java:195)
> 	at junit.framework.Assert.assertEquals(Assert.java:201)
> 	at org.apache.hadoop.mapred.NotificationTestCase.testMR(NotificationTestCase.java:184)
> 	...
> {code}
> It looks like a race condition:
> {code}
>     // run a job with FAILED status
>     System.out.println(UtilsForTests.runJobFail(this.createJobConf(), inDir,
>                                                 outDir).getID());
>     Thread.sleep(2000);
>     assertEquals(6, NotificationServlet.counter);
>     assertEquals(0, NotificationServlet.failureCounter);
> {code}
> Instead of sleeping for 2 seconds, we should keep checking the counter and fail after
a timeout.  There's a couple of similar places in the test that should be fixed too.  

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