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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4412) Create ClusterMonitor to compute ordered list of preferred NMs for OPPORTUNITIC containers
Date Tue, 17 May 2016 00:30:13 GMT

    [ https://issues.apache.org/jira/browse/YARN-4412?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15285720#comment-15285720
] 

Allen Wittenauer commented on YARN-4412:
----------------------------------------

bq.  i believe should be left as it is... since the class is always created and used within
the NodeStatusUpdater and never generally shared.

Let's be absolutely crystal clear.  If a patch generates a findbugs warning then either:

a) The findbugs issue needs to get fixed with code

or

b) The findbugs issue needs to get excluded

Until one of those two things happens, the patch absolutely should not be committed.  There
is no "just let it throw errors" option available.  This patch really should have been reverted
until at least all of the findbugs issues were dealt with.  (... and soon as I finish the
replacement for the nightly builds, issues like this won't be able to hide anymore.)

> 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.addendum-001.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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