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From "John Sichi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-1591) Lock the database also as part of locking a table/partition
Date Fri, 27 Aug 2010 18:36:53 GMT

    [ https://issues.apache.org/jira/browse/HIVE-1591?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12903517#action_12903517
] 

John Sichi commented on HIVE-1591:
----------------------------------

I applied this patch and tried the following scenario.

Client 1:  insert overwrite table pokes2 select * from pokes;

Client 2:  show locks;

Client 2 is getting an ArrayIndexOutOfBoundsException:  1.

Without the patch, show locks works fine.

Besides addressing this issue, two other items:

* the cause of the exception is getting swallowed, so it never makes it to hive.log, due to
the code below in DDLTask.showLocks.  It should be passing e along as the cause argument to
the 2-arg HiveException constructor so that there will be a "Caused By" in the stack dump.

   } catch (Exception e) {
      throw new HiveException(e.toString());
    }

* we really need tests for actual concurrency


> Lock the database also as part of locking a table/partition
> -----------------------------------------------------------
>
>                 Key: HIVE-1591
>                 URL: https://issues.apache.org/jira/browse/HIVE-1591
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Namit Jain
>            Assignee: Namit Jain
>             Fix For: 0.7.0
>
>         Attachments: hive.1591.1.patch
>
>
> Drop database should fail if a table in that database is being queried.

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