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https://issues.apache.org/jira/browse/YARN-1493?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13851051#comment-13851051
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Jian He commented on YARN-1493:
-------------------------------
Fixed recent comments, and rename SchedulerApplication to
SchedulerApplicationAttempt , and created a new SchedulerApplication for
keeping track of the app-specific info.
bq. Will the scheduler ever be in a state where an application has been removed
but an attempt from that app still remains?
I also think this should not happen.
> Schedulers don't recognize apps separately from app-attempts
> ------------------------------------------------------------
>
> Key: YARN-1493
> URL: https://issues.apache.org/jira/browse/YARN-1493
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Jian He
> Assignee: Jian He
> Attachments: YARN-1493.1.patch, YARN-1493.2.patch, YARN-1493.3.patch,
> YARN-1493.4.patch
>
>
> Today, scheduler is tied to attempt only.
> We need to separate app-level handling logic in scheduler. We can add new
> app-level events to the scheduler and separate the app-level logic out. This
> is good for work-preserving AM restart, RM restart, and also needed for
> differentiating app-level metrics and attempt-level metrics.
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