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https://issues.apache.org/jira/browse/YARN-7086?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16138947#comment-16138947
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Karthik Kambatla commented on YARN-7086:
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I like Jason's idea.
> Release all containers aynchronously
> ------------------------------------
>
> Key: YARN-7086
> URL: https://issues.apache.org/jira/browse/YARN-7086
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager
> Reporter: Arun Suresh
> Assignee: Arun Suresh
>
> We have noticed in production two situations that can cause deadlocks and
> cause scheduling of new containers to come to a halt, especially with regard
> to applications that have a lot of live containers:
> # When these applicaitons release these containers in bulk.
> # When these applications terminate abruptly due to some failure, the
> scheduler releases all its live containers in a loop.
> To handle the issues mentioned above, we have a patch in production to make
> sure ALL container releases happen asynchronously - and it has served us well.
> Opening this JIRA to gather feedback on if this is a good idea generally (cc
> [~leftnoteasy], [~jlowe], [~curino], [~kasha], [~subru], [~roniburd])
> BTW, In YARN-6251, we already have an asyncReleaseContainer() in the
> AbstractYarnScheduler and a corresponding scheduler event, which is currently
> used specifically for the container-update code paths (where the scheduler
> realeases temp containers which it creates for the update)
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