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https://issues.apache.org/jira/browse/YARN-4412?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15285609#comment-15285609
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Arun Suresh commented on YARN-4412:
-----------------------------------

[~gtCarrera9], Please note that both the 
[11226|https://builds.apache.org/job/PreCommit-YARN-Build/11226] and 
[11235|https://builds.apache.org/job/PreCommit-YARN-Build/11235] were based off 
the same patch and were kicked off roughly around the same time.. The later 
(for which you see a lot of javadoc and mvninstall -1s spewed by Jenkins) is 
due to some other issue with the execution environment..
In any case, with respect to 
[11226|https://builds.apache.org/job/PreCommit-YARN-Build/11226] 
# The checkstyle issues, most of which was caused by indentation errors have 
been corrected in YARN-2888
# The unit test failures are spurious and I have raised YARN-5091 to track and 
possibly fix them
# What remains are the findbugs issues:
## The *System.exit()* is what we are addressing with the re-opening of this 
JIRA
## The inconsistent synchronization issues in {{NodeStatusPBImpl}}.. i believe 
should be left as it is... since the class is always created and used within 
the NodeStatusUpdater and never generally shared.


> Create ClusterMonitor to compute ordered list of preferred NMs for 
> OPPORTUNITIC containers
> ------------------------------------------------------------------------------------------
>
>                 Key: YARN-4412
>                 URL: https://issues.apache.org/jira/browse/YARN-4412
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: nodemanager, resourcemanager
>            Reporter: Arun Suresh
>            Assignee: Arun Suresh
>             Fix For: 3.0.0-alpha1
>
>         Attachments: YARN-4412-yarn-2877.v1.patch, 
> YARN-4412-yarn-2877.v2.patch, YARN-4412-yarn-2877.v3.patch, 
> YARN-4412-yarn-2877.v4.patch, YARN-4412-yarn-2877.v5.patch, 
> YARN-4412-yarn-2877.v6.patch, YARN-4412.007.patch, YARN-4412.008.patch, 
> YARN-4412.009.patch, YARN-4412.find-bugs.patch
>
>
> Introduce a Cluster Monitor that aggregates load information from individual 
> Node Managers and computes an ordered list of preferred Node managers to be 
> used as target Nodes for OPPORTUNISTIC container allocations. 
> This list can be pushed out to the Node Manager (specifically the AMRMProxy 
> running on the Node) via the Allocate Response. This will be used to make 
> local Scheduling decisions



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