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https://issues.apache.org/jira/browse/YARN-2009?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15572984#comment-15572984
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Eric Payne commented on YARN-2009:
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[~sunilg], I think you may have missed my comment from
[above|https://issues.apache.org/jira/browse/YARN-2009?focusedCommentId=15553303&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15553303]:
- {{FifoIntraQueuePreemptionPlugin#calculateIdealAssignedResourcePerApp}}
-- The assignment to {{tmpApp.idealAssigned}} should be cloned:
{code}
tmpApp.idealAssigned = Resources.min(rc, clusterResource,
queueTotalUnassigned, appIdealAssigned);
...
Resources.subtractFrom(queueTotalUnassigned, tmpApp.idealAssigned);
{code}
-- In the above code, if {{queueTotalUnassigned}} is less than
{{appIdealAssigned}}, then {{tmpApp.idealAssigned}} is assigned a reference to
{{queueTotalUnassigned}}. Then, later, {{tmpApp.idealAssigned}} is actually
subtracted from itself.
So, I think the above code should be:
{code}
tmpApp.idealAssigned = Resources.clone(Resources.min(...));
{code}
> Priority support for preemption in ProportionalCapacityPreemptionPolicy
> -----------------------------------------------------------------------
>
> Key: YARN-2009
> URL: https://issues.apache.org/jira/browse/YARN-2009
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: capacityscheduler
> Reporter: Devaraj K
> Assignee: Sunil G
> Attachments: YARN-2009.0001.patch, YARN-2009.0002.patch,
> YARN-2009.0003.patch, YARN-2009.0004.patch, YARN-2009.0005.patch,
> YARN-2009.0006.patch
>
>
> While preempting containers based on the queue ideal assignment, we may need
> to consider preempting the low priority application containers first.
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