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From "Arun Suresh (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-7185) ContainerScheduler should only look at availableResource for GUARANTEED containers when opportunistic scheduling is enabled
Date Tue, 12 Sep 2017 04:00:05 GMT

    [ https://issues.apache.org/jira/browse/YARN-7185?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16162456#comment-16162456
] 

Arun Suresh commented on YARN-7185:
-----------------------------------

Thanks for the patch [~wangda],
In general, it LGTM.
Minor nit though: Can you see if you can add the testcase to {{TestContainerSchedulerQueuing}}
?
If the setup/teardown is not too complicated.

> ContainerScheduler should only look at availableResource for GUARANTEED containers when
opportunistic scheduling is enabled 
> ----------------------------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-7185
>                 URL: https://issues.apache.org/jira/browse/YARN-7185
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: yarn
>            Reporter: Sumana Sathish
>            Assignee: Tan, Wangda
>            Priority: Blocker
>         Attachments: YARN-7185.001.patch, YARN-7185.002.patch, YARN-7185.003.patch
>
>
> Found an issue: 
> When DefaultContainerCalculator is enabled and opportunistic container allocation is
disabled. It is possible that for a NM:
> {code} 
> Σ(allocated-container.vcores) > nm.configured-vores. 
> {code} 
> When this happens, ContainerScheduler will report errors like:
> bq. ContainerScheduler (ContainerScheduler.java:pickOpportunisticContainersToKill(458))
- There are no sufficient resources to start guaranteed.
> This will be an incompatible change after 2.8 because before YARN-6706, we can start
containers when DefaultContainerCalculator is configured and vcores is overallocated.



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