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https://issues.apache.org/jira/browse/YARN-1184?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13769448#comment-13769448
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Hudson commented on YARN-1184:
------------------------------
FAILURE: Integrated in Hadoop-Hdfs-trunk #1525 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk/1525/])
YARN-1184. ClassCastException during preemption enforcement. (cdouglas:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1523863)
* /hadoop/common/trunk/hadoop-yarn-project/CHANGES.txt
*
/hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/LeafQueue.java
> ClassCastException is thrown during preemption When a huge job is submitted
> to a queue B whose resources is used by a job in queueA
> -----------------------------------------------------------------------------------------------------------------------------------
>
> Key: YARN-1184
> URL: https://issues.apache.org/jira/browse/YARN-1184
> Project: Hadoop YARN
> Issue Type: Bug
> Components: capacityscheduler, resourcemanager
> Affects Versions: 2.1.0-beta
> Reporter: J.Andreina
> Assignee: Chris Douglas
> Fix For: 2.1.1-beta
>
> Attachments: Y1184-0.patch, Y1184-1.patch
>
>
> preemption is enabled.
> Queue = a,b
> a capacity = 30%
> b capacity = 70%
> Step 1: Assign a big job to queue a ( so that job_a will utilize some
> resources from queue b)
> Step 2: Assigne a big job to queue b.
> Following exception is thrown at Resource Manager
> {noformat}
> 2013-09-12 10:42:32,535 ERROR [SchedulingMonitor
> (ProportionalCapacityPreemptionPolicy)] yarn.YarnUncaughtExceptionHandler
> (YarnUncaughtExceptionHandler.java:uncaughtException(68)) - Thread
> Thread[SchedulingMonitor (ProportionalCapacityPreemptionPolicy),5,main] threw
> an Exception.
> java.lang.ClassCastException: java.util.Collections$UnmodifiableSet cannot be
> cast to java.util.NavigableSet
> at
> org.apache.hadoop.yarn.server.resourcemanager.monitor.capacity.ProportionalCapacityPreemptionPolicy.getContainersToPreempt(ProportionalCapacityPreemptionPolicy.java:403)
> at
> org.apache.hadoop.yarn.server.resourcemanager.monitor.capacity.ProportionalCapacityPreemptionPolicy.containerBasedPreemptOrKill(ProportionalCapacityPreemptionPolicy.java:202)
> at
> org.apache.hadoop.yarn.server.resourcemanager.monitor.capacity.ProportionalCapacityPreemptionPolicy.editSchedule(ProportionalCapacityPreemptionPolicy.java:173)
> at
> org.apache.hadoop.yarn.server.resourcemanager.monitor.SchedulingMonitor.invokePolicy(SchedulingMonitor.java:72)
> at
> org.apache.hadoop.yarn.server.resourcemanager.monitor.SchedulingMonitor$PreemptionChecker.run(SchedulingMonitor.java:82)
> at java.lang.Thread.run(Thread.java:662)
> {noformat}
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