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From "Lin Yiqun (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-4399) FairScheduler allocated container should resetSchedulingOpportunities count of its priority
Date Mon, 30 Nov 2015 14:44:11 GMT

     [ https://issues.apache.org/jira/browse/YARN-4399?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Lin Yiqun updated YARN-4399:
----------------------------
    Attachment: YARN-4399.001.patch

> FairScheduler allocated container should resetSchedulingOpportunities count of its priority
> -------------------------------------------------------------------------------------------
>
>                 Key: YARN-4399
>                 URL: https://issues.apache.org/jira/browse/YARN-4399
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: scheduler
>    Affects Versions: 2.7.1
>            Reporter: Lin Yiqun
>            Assignee: Lin Yiqun
>         Attachments: YARN-4399.001.patch
>
>
> There is a bug on fairScheduler allocating containers when you configurate the locality
configs.When you attempt to assigned a container,it will invoke {{FSAppAttempt#addSchedulingOpportunity}}
whenever it can be assigned successfully or not. And if you configurate the yarn.scheduler.fair.locality.threshold.node
and yarn.scheduler.fair.locality.threshold.rack, the schedulingOpportunity value will influence
the locality of containers.Because if one container is assigned successfully and its  priority
schedulingOpportunity count will be increased, and second container will be increased again.This
will may be let their priority of allowedLocality degrade. And this will let this container
dealt by rackRequest. So I think in fairScheduler allocating container, if the previous container
was dealt, its priority of schedulerCount should be reset to 0, and don't let its value influence
container's allocating in next iteration and this will increased the locality of containers.



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