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https://issues.apache.org/jira/browse/YARN-9277?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16766694#comment-16766694
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Zhaohui Xin commented on YARN-9277:
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Hi, [~yufeigu]. Thanks for your reply.
{quote}Correct me if I am wrong, there are no priority between Yarn jobs.
Priority has been applied to tasks inside one job, which was there before the
FS preemption overhaul. We need only priorities between mappers and reducers or
other customized priorities since AM containers are always the first priority
and have been taken care.
{quote}
> Add more restrictions In FairScheduler Preemption
> --------------------------------------------------
>
> Key: YARN-9277
> URL: https://issues.apache.org/jira/browse/YARN-9277
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: fairscheduler
> Reporter: Zhaohui Xin
> Assignee: Zhaohui Xin
> Priority: Major
> Attachments: YARN-9277.001.patch, YARN-9277.002.patch
>
>
>
> I think we should add more restrictions in fair scheduler preemption.
> * We should not preempt self
> * We should not preempt high priority job
> * We should not preempt container which has been running for a long time.
> * ...
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