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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-3872) event handling races in ContainerLauncherImpl and TestContainerLauncher
Date Mon, 18 Mar 2013 22:05:16 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-3872?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chris Nauroth updated MAPREDUCE-3872:
-------------------------------------

    Attachment: MAPREDUCE-3872.2.patch

+1 for the patch.

I'm attaching a slightly rebased version of the same code just so the patch applies cleanly
to current trunk.  The race condition around {{allHosts}} happens pretty easily on Windows
and causes frequent failures in {{TestContainerLauncher}}.  I confirmed that this patch fixes
the failures on Windows and also works on Mac.
                
> event handling races in ContainerLauncherImpl and TestContainerLauncher
> -----------------------------------------------------------------------
>
>                 Key: MAPREDUCE-3872
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3872
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: client, mrv2
>    Affects Versions: 0.23.1
>            Reporter: Patrick Hunt
>            Assignee: Robert Kanter
>         Attachments: MAPREDUCE-3872.2.patch, MAPREDUCE-3872.patch, MAPREDUCE-3872.patch,
MAPREDUCE-3872.patch
>
>
> TestContainerLauncher is failing intermittently for me.
> {noformat}
> junit.framework.AssertionFailedError: Expected: <null> but was: Expected 22 but
found 21
> 	at junit.framework.Assert.fail(Assert.java:47)
> 	at junit.framework.Assert.assertTrue(Assert.java:20)
> 	at junit.framework.Assert.assertNull(Assert.java:233)
> 	at junit.framework.Assert.assertNull(Assert.java:226)
> 	at org.apache.hadoop.mapreduce.v2.app.launcher.TestContainerLauncher.testPoolSize(TestContainerLauncher.java:117)
> {noformat}
> Patch momentarily.

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