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https://issues.apache.org/jira/browse/YARN-2109?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14043329#comment-14043329
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Hudson commented on YARN-2109:
------------------------------

FAILURE: Integrated in Hadoop-Yarn-trunk #594 (See 
[https://builds.apache.org/job/Hadoop-Yarn-trunk/594/])
YARN-2109. Fix TestRM to work with both schedulers. (Anubhav Dhoot via kasha) 
(kasha: http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1605142)
* /hadoop/common/trunk/hadoop-yarn-project/CHANGES.txt
* 
/hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestRM.java


> Fix TestRM to work with both schedulers
> ---------------------------------------
>
>                 Key: YARN-2109
>                 URL: https://issues.apache.org/jira/browse/YARN-2109
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: scheduler
>            Reporter: Anubhav Dhoot
>            Assignee: Karthik Kambatla
>              Labels: test
>             Fix For: 2.5.0
>
>         Attachments: YARN-2109.001.patch, YARN-2109.001.patch
>
>
> testNMTokenSentForNormalContainer requires CapacityScheduler and was fixed in 
> [YARN-1846|https://issues.apache.org/jira/browse/YARN-1846] to explicitly set 
> it to be CapacityScheduler. But if the default scheduler is set to 
> FairScheduler then the rest of the tests that execute after this will fail 
> with invalid cast exceptions when getting queuemetrics. This is based on test 
> execution order as only the tests that execute after this test will fail. 
> This is because the queuemetrics will be initialized by this test to 
> QueueMetrics and shared by the subsequent tests. 
> We can explicitly clear the metrics at the end of this test to fix this.
> For example
> java.lang.ClassCastException: 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.QueueMetrics cannot 
> be cast to 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FSQueueMetrics
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FSQueueMetrics.forQueue(FSQueueMetrics.java:103)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.reinitialize(FairScheduler.java:1275)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$RMActiveServices.serviceInit(ResourceManager.java:418)
>       at 
> org.apache.hadoop.service.AbstractService.init(AbstractService.java:163)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.createAndInitActiveServices(ResourceManager.java:808)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.serviceInit(ResourceManager.java:230)
>       at 
> org.apache.hadoop.service.AbstractService.init(AbstractService.java:163)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.MockRM.<init>(MockRM.java:90)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.MockRM.<init>(MockRM.java:85)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.MockRM.<init>(MockRM.java:81)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.TestRM.testNMToken(TestRM.java:232)



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