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https://issues.apache.org/jira/browse/HIVE-8227?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14145845#comment-14145845
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Gunther Hagleitner commented on HIVE-8227:
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test failures are unrelated.
> NPE w/ hive on tez when doing unions on empty tables
> ----------------------------------------------------
>
> Key: HIVE-8227
> URL: https://issues.apache.org/jira/browse/HIVE-8227
> Project: Hive
> Issue Type: Bug
> Reporter: Gunther Hagleitner
> Assignee: Gunther Hagleitner
> Attachments: HIVE-8227.1.patch, HIVE-8227.2.patch
>
>
> We're looking at aliasToWork.values() to determine input paths etc. This can
> contain nulls when we're scanning empty tables.
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