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https://issues.apache.org/jira/browse/MAPREDUCE-3784?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13199732#comment-13199732
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Hudson commented on MAPREDUCE-3784:
-----------------------------------
Integrated in Hadoop-Mapreduce-trunk #978 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/978/])
MAPREDUCE-3784. Fixed CapacityScheduler so that maxActiveApplications and
maxActiveApplicationsPerUser per queue are not too low for small clusters.
Contributed by Arun C Murthy.
vinodkv :
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1239971
Files :
* /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/CSQueueUtils.java
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/LeafQueue.java
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/TestApplicationLimits.java
> maxActiveApplications(|PerUser) per queue is too low for small clusters
> -----------------------------------------------------------------------
>
> Key: MAPREDUCE-3784
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3784
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 0.23.0
> Reporter: Ramya Sunil
> Assignee: Arun C Murthy
> Fix For: 0.23.1
>
> Attachments: MAPREDUCE-3784.patch, MAPREDUCE-3784.patch,
> MAPREDUCE-3784.patch, MAPREDUCE-3784.patch, MAPREDUCE-3784.patch
>
>
> We ran into this issue while testing on small clusters.
> On a 7node cluster with 8G per node, for a queue with absolute capacity 30%,
> user limit 100%, maxActiveApplications and maxActiveApplicationsPerUser is
> calculated to be 1.
> This means that even though the queue has 17GB(0.3*8*7), only 1 user can run
> 1 app at a given time queuing up rest of the apps/users. This hurts
> performance on small clusters.
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