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https://issues.apache.org/jira/browse/YARN-4091?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15409976#comment-15409976
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Eric Payne commented on YARN-4091:
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bq. Any other suggestions? Sunil G / Eric Payne.
Latest patch LGTM +1. Thanks [~ChenGe] and [~leftnoteasy].
> Add REST API to retrieve scheduler activity
> -------------------------------------------
>
> Key: YARN-4091
> URL: https://issues.apache.org/jira/browse/YARN-4091
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: capacity scheduler, resourcemanager
> Affects Versions: 2.7.0
> Reporter: Sunil G
> Assignee: Chen Ge
> Fix For: 3.0.0-alpha2
>
> Attachments: Improvement on debugdiagnostic information - YARN.pdf,
> SchedulerActivityManager-TestReport v2.pdf,
> SchedulerActivityManager-TestReport.pdf, YARN-4091-design-doc-v1.pdf,
> YARN-4091.1.patch, YARN-4091.2.patch, YARN-4091.3.patch, YARN-4091.4.patch,
> YARN-4091.5.patch, YARN-4091.5.patch, YARN-4091.6.patch, YARN-4091.7.patch,
> YARN-4091.8.patch, YARN-4091.preliminary.1.patch, app_activities v2.json,
> app_activities.json, node_activities v2.json, node_activities.json
>
>
> 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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