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https://issues.apache.org/jira/browse/HIVE-15373?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15727243#comment-15727243
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Sergey Shelukhin commented on HIVE-15373:
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It is used as a threadlocal manner on a higher level, so all of these are
effectively threadlocal. It would be nice to get rid of threadlocals, but that
would be a much larger piece of work.
> Transaction management isn't thread-safe
> ----------------------------------------
>
> Key: HIVE-15373
> URL: https://issues.apache.org/jira/browse/HIVE-15373
> Project: Hive
> Issue Type: Bug
> Components: Hive
> Reporter: Alexander Kolbasov
>
> ObjectStore.java has several important calls which are not thread-safe:
> * openTransaction()
> * commitTransaction()
> * rollbackTransaction()
> These should be made thread-safe.
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