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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-3537) release locks at the end of move tasks
Date Fri, 11 Jan 2013 05:58:13 GMT

    [ https://issues.apache.org/jira/browse/HIVE-3537?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13550862#comment-13550862
] 

Ashutosh Chauhan commented on HIVE-3537:
----------------------------------------

Namit,
Will this result in fix introduced in HIVE-3106 redundant, i.e., dependency task (and thus
config variable) introduced will no longer be required. If not, than config variable should
always be true, isn't it for concurrency to work correctly?
                
> release locks at the end of move tasks
> --------------------------------------
>
>                 Key: HIVE-3537
>                 URL: https://issues.apache.org/jira/browse/HIVE-3537
>             Project: Hive
>          Issue Type: Bug
>          Components: Locking, Query Processor
>            Reporter: Namit Jain
>            Assignee: Namit Jain
>         Attachments: hive.3537.1.patch, hive.3537.2.patch, hive.3537.3.patch, hive.3537.4.patch,
hive.3537.5.patch, hive.3537.6.patch, hive.3537.7.patch, hive.3537.8.patch, hive.3537.9.patch
>
>
> Look at HIVE-3106 for details.
> In order to make sure that concurrency is not an issue for multi-table 
> inserts, the current option is to introduce a dependency task, which thereby
> delays the creation of all partitions. It would be desirable to release the
> locks for the outputs as soon as the move task is completed. That way, for
> multi-table inserts, the concurrency can be enabled without delaying any 
> table.
> Currently, the movetask contains a input/output, but they do not seem to be
> populated correctly.

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