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https://issues.apache.org/jira/browse/YARN-7138?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16193996#comment-16193996
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Robert Kanter commented on YARN-7138:
-------------------------------------
I agree with [~wangda]; though it might be cleaner to close this as "Won't Fix"
and file a new JIRA. We should change this to introduce a proper scheduler API
as a long term goal. As it is now, you can't practically make your own
Scheduler for a number of reasons. I big one is that there's a number of
places in the code where we cast to {{AbstractYarnScheduler}} and that's
{{@Private}} :)
Does anyone mind if I go ahead and do that?
> Fix incompatible API change for YarnScheduler involved by YARN-5521
> -------------------------------------------------------------------
>
> Key: YARN-7138
> URL: https://issues.apache.org/jira/browse/YARN-7138
> Project: Hadoop YARN
> Issue Type: Bug
> Components: scheduler
> Reporter: Junping Du
> Priority: Critical
>
> From JACC report for 2.8.2 against 2.7.4, it indicates that we have
> incompatible changes happen in YarnScheduler:
> {noformat}
> hadoop-yarn-server-resourcemanager-2.7.4.jar, YarnScheduler.class
> package org.apache.hadoop.yarn.server.resourcemanager.scheduler
> YarnScheduler.allocate ( ApplicationAttemptId p1, List<ResourceRequest> p2,
> List<ContainerId> p3, List<String> p4, List<String> p5 ) [abstract] :
> Allocation
> {noformat}
> The root cause is YARN-5221. We should change it back or workaround this by
> adding back original API (mark as deprecated if not used any more).
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