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https://issues.apache.org/jira/browse/HIVE-23503?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17140451#comment-17140451
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Denys Kuzmenko commented on HIVE-23503:
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Pushed to master.
Thank you for the review [~vpeter] and [~pvary]!
> ValidTxnManager doesn't consider txns opened and committed between snapshot
> generation and locking when evaluating ValidTxnListState
> ------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HIVE-23503
> URL: https://issues.apache.org/jira/browse/HIVE-23503
> Project: Hive
> Issue Type: Bug
> Components: Transactions
> Reporter: Denys Kuzmenko
> Assignee: Denys Kuzmenko
> Priority: Major
> Attachments: HIVE-23503.1.patch
>
>
> ValidTxnManager doesn't consider txns opened and committed between snapshot
> generation and locking when evaluating ValidTxnListState. This cause issues
> like duplicate insert in case of concurrent merge insert & insert.
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