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https://issues.apache.org/jira/browse/YARN-2323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14068210#comment-14068210
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Hudson commented on YARN-2323:
------------------------------
FAILURE: Integrated in Hadoop-trunk-Commit #5921 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/5921/])
YARN-2323. FairShareComparator creates too many Resource objects (Hong Zhiguo
via Sandy Ryza) (sandy:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1612187)
* /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/policies/FairSharePolicy.java
> FairShareComparator creates too many Resource objects
> -----------------------------------------------------
>
> Key: YARN-2323
> URL: https://issues.apache.org/jira/browse/YARN-2323
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: fairscheduler
> Reporter: Hong Zhiguo
> Assignee: Hong Zhiguo
> Priority: Minor
> Fix For: 2.6.0
>
> Attachments: YARN-2323-2.patch, YARN-2323.patch
>
>
> Each call of {{FairShareComparator}} creates a new Resource object "one":
> {code}
> Resource one = Resources.createResource(1);
> {code}
> At the volume of 1000 nodes and 1000 apps, the comparator will be called more
> than 10 million times per second, thus creating more than 10 million object
> "one", which is unnecessary.
> Since the object "one" is read-only and is never referenced outside of
> comparator, we could make it static.
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