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https://issues.apache.org/jira/browse/HIVE-21214?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Deepak Jaiswal updated HIVE-21214:
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Attachment: HIVE-21214.3.patch
> MoveTask : Use attemptId instead of file size for deduplication of files
> compareTempOrDuplicateFiles()
> ------------------------------------------------------------------------------------------------------
>
> Key: HIVE-21214
> URL: https://issues.apache.org/jira/browse/HIVE-21214
> Project: Hive
> Issue Type: Bug
> Reporter: Deepak Jaiswal
> Assignee: Deepak Jaiswal
> Priority: Major
> Attachments: HIVE-21214.1.patch, HIVE-21214.2.patch,
> HIVE-21214.3.patch
>
>
> For a given task, if there is more than one attempt then deduplication logic
> kicks in.
> {noformat}
> Utilities.compareTempOrDuplicateFiles(){noformat}
> The logic uses file size and picks the one with largest size. This logic is
> very fragile.
> ideally, it should pick the successful attempt's file.
> However, a simpler solution is to pick the newest attempt and also checking
> the file size for the newest attempt is the largest.
> If not, throw an exception.
>
> cc [~gopalv] [~thejas] [~jdere] [~ekoifman]
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