[jira] [Commented] (YARN-10397) SchedulerRequest should be forwarded to scheduler if custom scheduler supports placement constraints

["Brahma Reddy Battula (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/YARN-10397?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17192799#comment-17192799 ] 

Brahma Reddy Battula commented on YARN-10397:
---------------------------------------------

+1, Going to commit shortly.

> SchedulerRequest should be forwarded to scheduler if custom scheduler supports placement constraints
> ----------------------------------------------------------------------------------------------------
>
>                 Key: YARN-10397
>                 URL: https://issues.apache.org/jira/browse/YARN-10397
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Bilwa S T
>            Assignee: Bilwa S T
>            Priority: Minor
>         Attachments: YARN-10397.001.patch, YARN-10397.002.patch
>
>
> Currently only CapacityScheduler supports placement constraints so request gets forwarded only for capacityScheduler. Below exception will be thrown if custom scheduler supports placement constraint
> {code:java}
> if (request.getSchedulingRequests() != null
>         && !request.getSchedulingRequests().isEmpty()) {
>       if (!(scheduler instanceof CapacityScheduler)) {
>         String message = "Found non empty SchedulingRequest of "
>             + "AllocateRequest for application=" + appAttemptId.toString()
>             + ", however the configured scheduler="
>             + scheduler.getClass().getCanonicalName()
>             + " cannot handle placement constraints, rejecting this "
>             + "allocate operation";
>         LOG.warn(message);
>         throw new YarnException(message);
>       }
>     }
> {code}
>  



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