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https://issues.apache.org/jira/browse/HIVE-13221?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15315219#comment-15315219
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Eugene Koifman commented on HIVE-13221:
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as of HIVE-11388 it is safe to start multiple instance of ACID background task.
Prior to HIVE-11388, it was expected that hive.compactor.initiator.on = true
for only 1 standalone metastore in the cluster (not enforced).
This prop is checked in HiveMetaStore before stating these threads (except for
Worker which was always ok to have multiple instance of).
Further, before HIVE-11388, the expectation was that only 1 instance of each
thread (except Worker) is started in the single metastore instance.
> expose metastore APIs from HS2
> ------------------------------
>
> Key: HIVE-13221
> URL: https://issues.apache.org/jira/browse/HIVE-13221
> Project: Hive
> Issue Type: Bug
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Attachments: HIVE-13221.01.patch, HIVE-13221.patch
>
>
> I was always wondering why we don't do that, for the people who run HS2 and
> also need metastore due to it being used externally; they don't need to run a
> standalone metastore.
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