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https://issues.apache.org/jira/browse/YARN-4494?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15289900#comment-15289900
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Karthik Kambatla commented on YARN-4494:
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I am okay with asynchronous recovery so long as it is transparent to clients.
That is, requesting details about a completed app should return the same values
if the recovery was synchronous. This would also apply to queries for apps of a
particular type, start/finish time etc.
It might be possible for the client calls to synchronously wait for recovery to
finish, but I get the feeling it might not be all that straight-forward. Given
the option of a low number of completed applications and ATSv2 being around the
corner, my recommendation would be to not look at asynchronous recovery.
> Recover completed apps asynchronously
> -------------------------------------
>
> Key: YARN-4494
> URL: https://issues.apache.org/jira/browse/YARN-4494
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: resourcemanager
> Reporter: Jun Gong
> Assignee: Jun Gong
>
> With RM HA enabled, when recovering apps, recover completed apps
> asynchronously.
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