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From "Chaoyu Tang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-16189) Table column stats might be invalidated in a failed table rename
Date Mon, 13 Mar 2017 19:11:41 GMT

    [ https://issues.apache.org/jira/browse/HIVE-16189?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15922770#comment-15922770
] 

Chaoyu Tang commented on HIVE-16189:
------------------------------------

I thought about that, but it seems a little difficult to create such a test case where the
HFDS rename (data move) fails in
{code}
       if (srcFs.exists(srcPath) && !srcFs.rename(srcPath, destPath)) {
            throw new IOException("Renaming " + srcPath + " to " + destPath + " failed");
       }
{code}
after the metadata change has been successfully committed. 
Do you have any suggestion on that? I was able to manually reproduce this issue and verify
the patch by using debug breakpoint and simulating the file move failure.        

> Table column stats might be invalidated in a failed table rename
> ----------------------------------------------------------------
>
>                 Key: HIVE-16189
>                 URL: https://issues.apache.org/jira/browse/HIVE-16189
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Chaoyu Tang
>            Assignee: Chaoyu Tang
>         Attachments: HIVE-16189.patch
>
>
> If the table rename does not succeed due to its failure in moving the data to the new
renamed table folder, the changes in TAB_COL_STATS are not rolled back which leads to invalid
column stats.



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