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https://issues.apache.org/jira/browse/HIVE-1655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12913317#action_12913317
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Namit Jain commented on HIVE-1655:
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+1
> Adding consistency check at jobClose() when committing dynamic partitions
> -------------------------------------------------------------------------
>
> Key: HIVE-1655
> URL: https://issues.apache.org/jira/browse/HIVE-1655
> Project: Hadoop Hive
> Issue Type: Improvement
> Reporter: Ning Zhang
> Assignee: Ning Zhang
> Attachments: HIVE-1655.patch
>
>
> In case of dynamic partition insert, FileSinkOperator generated a directory
> for a new partition and the files in the directory is named with '_tmp*'.
> When a task succeed, the file is renamed to remove the "_tmp", which
> essentially implement the "commit" semantics. A lot of exceptions could
> happen (process got killed, machine dies etc.) could left the _tmp files
> exist in the DP directory. These _tmp files should be deleted ("rolled back")
> at successful jobClose(). After the deletion, we should also delete any empty
> directories.
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