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https://issues.apache.org/jira/browse/YARN-5831?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15781573#comment-15781573
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Yufei Gu commented on YARN-5831:
--------------------------------
There is an assumption from the original code: if the parent queue is
non-preemptable, the children must be non-preemptable. My patch follow this
assumption.
{code}
for (FSQueue q = getQueue();
!q.getQueueName().equals("root");
q = q.getParent()) {
if (!q.isPreemptable()) {
return false;
}
}
{code}
> Propagate allowPreemptionFrom flag all the way down to the app
> --------------------------------------------------------------
>
> Key: YARN-5831
> URL: https://issues.apache.org/jira/browse/YARN-5831
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: fairscheduler
> Reporter: Karthik Kambatla
> Assignee: Yufei Gu
>
> FairScheduler allows disallowing preemption from a queue. When checking if
> preemption for an application is allowed, the new preemption code recurses
> all the way to the root queue to check this flag.
> Propagating this information all the way to the app will be more efficient.
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