Tao Yang created YARN-9567:
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Summary: Add diagnostics for outstanding resource requests on app
attempts page
Key: YARN-9567
URL: https://issues.apache.org/jira/browse/YARN-9567
Project: Hadoop YARN
Issue Type: Sub-task
Components: capacityscheduler
Reporter: Tao Yang
Assignee: Tao Yang
Attachments: no_diagnostic_at_first.png,
show_diagnostics_after_requesting_app_activities_REST_API.png
Currently on app attempt page we can see outstanding resource requests, it will
be helpful for users to know why if we can join diagnostics of this app with
these.
Discussed with [~cheersyang], we can passively load diagnostics from cache of
completed app activities instead of actively triggering which may bring
uncontrollable risk.
For example:
(1) At first we can see no diagnostic in cache if app activities not triggered
below the outstanding requests.
!no_diagnostic_at_first.png!
(2) After requesting the application activities REST API, we can see
diagnostics now.
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