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https://issues.apache.org/jira/browse/HIVE-19279?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16449010#comment-16449010
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Sergey Shelukhin commented on HIVE-19279:
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Yes, see description. I'm not sure what code relies on not skipping if there
isn't a directory :)
> remove magic directory skipping from CopyTask
> ---------------------------------------------
>
> Key: HIVE-19279
> URL: https://issues.apache.org/jira/browse/HIVE-19279
> Project: Hive
> Issue Type: Bug
> Reporter: Sergey Shelukhin
> Priority: Major
>
> Follow up from HIVE-17657.
> Code exists in copytask that copies files (fancy that); however, when listing
> the files, if a single directory exists at the source with no other files, it
> will skip the directory and copy the files inside instead.
> This directory in various tests is either the "data" directory from export,
> or some random partition directory ("foo=bar") that if not skipped makes it
> into the real partition directory at the destination.
> The directory is not skipped if it's not by itself, i.e. any other files or
> directories are present.
> This seems brittle. Caller of the CopyTask should specify exactly what it
> wants copied instead of relying on this behavior.
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