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https://issues.apache.org/jira/browse/YARN-2073?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14008914#comment-14008914
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Hudson commented on YARN-2073:
------------------------------

FAILURE: Integrated in Hadoop-Mapreduce-trunk #1782 (See 
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1782/])
YARN-2073. Fair Scheduler: Add a utilization threshold to prevent preempting 
resources when cluster is free (Karthik Kambatla via Sandy Ryza) (sandy: 
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1597209)
* /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/fair/FairScheduler.java
* 
/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/fair/FairSchedulerConfiguration.java
* 
/hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/FairSchedulerTestBase.java
* 
/hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/TestFairScheduler.java
* 
/hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/TestFairSchedulerPreemption.java
* 
/hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/apt/FairScheduler.apt.vm


> Fair Scheduler: Add a utilization threshold to prevent preempting resources 
> when cluster is free
> ------------------------------------------------------------------------------------------------
>
>                 Key: YARN-2073
>                 URL: https://issues.apache.org/jira/browse/YARN-2073
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: scheduler
>    Affects Versions: 2.4.0
>            Reporter: Karthik Kambatla
>            Assignee: Karthik Kambatla
>            Priority: Critical
>             Fix For: 2.5.0
>
>         Attachments: yarn-2073-0.patch, yarn-2073-1.patch, yarn-2073-2.patch, 
> yarn-2073-3.patch, yarn-2073-4.patch
>
>
> Preemption should kick in only when the currently available slots don't match 
> the request. 



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