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https://issues.apache.org/jira/browse/YARN-10397?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17177834#comment-17177834
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Bilwa S T commented on YARN-10397:
----------------------------------
cc [~leftnoteasy] [~prabhujoseph]
> 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: Major
> Attachments: YARN-10397.001.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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