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https://issues.apache.org/jira/browse/HIVE-15541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15819078#comment-15819078
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Sergey Shelukhin commented on HIVE-15541:
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nit: whitespace in case PRE_EXEC_HOOK: is weird (statements are on different
levels than other cases).
Why 64 and not 128 or 10240? :)
What I had in mind was a single thread drawing items out of the queue, w/o
runnables. But this also work. +1, above can be fixed on commit
> Hive OOM when ATSHook enabled and ATS goes down
> -----------------------------------------------
>
> Key: HIVE-15541
> URL: https://issues.apache.org/jira/browse/HIVE-15541
> Project: Hive
> Issue Type: Bug
> Components: Hooks
> Reporter: Jason Dere
> Assignee: Jason Dere
> Attachments: HIVE-15541.1.patch, HIVE-15541.2.patch,
> HIVE-15541.3.patch
>
>
> The ATS API used by the Hive ATSHook is a blocking call, if ATS goes down
> this can block the ATSHook executor, while the hook continues to submit work
> to the executor with each query.
> Over time the buildup of queued items can cause OOM.
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