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https://issues.apache.org/jira/browse/HIVE-1655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12910880#action_12910880
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Ning Zhang commented on HIVE-1655:
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Actually the _tmp files are taken care of by FSPaths.commit() called at
FileSinkOperator.close() and any missed _tmp* files are removed in jobClose()
-> Utilities.removeTempOrDuplicateFiles(). The only missing piece is the remove
the empty directories at jobClose().
> 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
>
> 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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