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https://issues.apache.org/jira/browse/YARN-4091?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14908935#comment-14908935
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Wangda Tan commented on YARN-4091:
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[~sunilg], sure :), cannot wait to see it!
> Improvement: Introduce more debug/diagnostics information to detail out
> scheduler activity
> ------------------------------------------------------------------------------------------
>
> Key: YARN-4091
> URL: https://issues.apache.org/jira/browse/YARN-4091
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: capacity scheduler, resourcemanager
> Affects Versions: 2.7.0
> Reporter: Sunil G
> Assignee: Sunil G
> Attachments: Improvement on debugdiagnostic information - YARN.pdf
>
>
> As schedulers are improved with various new capabilities, more configurations
> which tunes the schedulers starts to take actions such as limit assigning
> containers to an application, or introduce delay to allocate container etc.
> There are no clear information passed down from scheduler to outerworld under
> these various scenarios. This makes debugging very tougher.
> This ticket is an effort to introduce more defined states on various parts in
> scheduler where it skips/rejects container assignment, activate application
> etc. Such information will help user to know whats happening in scheduler.
> Attaching a short proposal for initial discussion. We would like to improve
> on this as we discuss.
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