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https://issues.apache.org/jira/browse/YARN-5774?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15630486#comment-15630486
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Daniel Templeton commented on YARN-5774:
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Thanks, [~yufeigu]. In addition to [[email protected]]'s comments,
I have a couple of minor points:
* {{AbstractYarnScheduler.normailzeRequest(List<...> ask...)}} should be
{{normalizeRequests()}} to avoid confusion.
* While you're in there, you may as well correct the typo (hte/the) in the
javadoc for {{ResourceCalculator.normalize()}}
* To add onto [[email protected]]'s comments,
{{ResourceCalculator.normalize()}} should check memory and CPU independently.
Also, I think you can leave out the 0 check in
{{SchedulerUtils.normalizeRequest()}} since it's redundant.
* Is throwing an exception the right thing to do if the min allocation is 0?
Looks to me like that exception my be pretty hard to diagnose.
> MR Job stuck in ACCEPTED status without any progress in Fair Scheduler if set
> yarn.scheduler.minimum-allocation-mb to 0.
> ------------------------------------------------------------------------------------------------------------------------
>
> Key: YARN-5774
> URL: https://issues.apache.org/jira/browse/YARN-5774
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager
> Affects Versions: 3.0.0-alpha1
> Reporter: Yufei Gu
> Assignee: Yufei Gu
> Labels: oct16-easy
> Attachments: YARN-5774.001.patch, YARN-5774.002.patch,
> YARN-5774.003.patch
>
>
> MR Job stuck in ACCEPTED status without any progress in Fair Scheduler
> because there is no resource request for the AM. This happened when you
> configure {{yarn.scheduler.minimum-allocation-mb}} to zero.
> The problem is in the code used by both Capacity Scheduler and Fair
> Scheduler. {{scheduler.increment-allocation-mb}} is a concept in FS, but not
> CS. So the common code in class RMAppManager passes the
> {{yarn.scheduler.minimum-allocation-mb}} as incremental one because there is
> no incremental one for CS when it tried to normalize the resource requests.
> {code}
> SchedulerUtils.normalizeRequest(amReq, scheduler.getResourceCalculator(),
> scheduler.getClusterResource(),
> scheduler.getMinimumResourceCapability(),
> scheduler.getMaximumResourceCapability(),
> scheduler.getMinimumResourceCapability()); --> incrementResource
> should be passed here.
> {code}
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