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From "Sushanth Sowmyan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-10722) external table creation with msck in Hive can create unusable partition
Date Thu, 28 May 2015 23:47:17 GMT

    [ https://issues.apache.org/jira/browse/HIVE-10722?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14563925#comment-14563925
] 

Sushanth Sowmyan commented on HIVE-10722:
-----------------------------------------

Thanks! Sorry to be so finicky.

+1 on the new patch.

> external table creation with msck in Hive can create unusable partition
> -----------------------------------------------------------------------
>
>                 Key: HIVE-10722
>                 URL: https://issues.apache.org/jira/browse/HIVE-10722
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 0.14.1, 1.0.0
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>            Priority: Critical
>         Attachments: HIVE-10722.01.patch, HIVE-10722.patch
>
>
> There can be directories in HDFS containing unprintable characters; when doing hadoop
fs -ls, these characters are not even visible, and can only be seen for example if output
is piped thru od.
> When these are loaded via msck, they are stored in e.g. mysql as "?" (literal question
mark, findable via LIKE '%?%' in db) and show accordingly in Hive.
> However, datanucleus appears to encode it as %3F; this causes the partition to be unusable
- it cannot be dropped, and other operations like drop table get stuck (didn't investigate
in detail why; drop table got unstuck as soon as the partition was removed from metastore).
> We should probably have a 2-way option for such cases - error out on load (default),
or convert to '?'/drop such characters (and have partition that actually works, too).
> We should also check if partitions with '?' inserted explicitly work at all with datanucleus.



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