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Date: Fri, 26 Jul 2013 03:57:50 +0000 (UTC)
From: "Edward Capriolo (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
Message-ID: <JIRA.12645703.1367442683040.116184.1374811070883@arcas>
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Subject: [jira] [Commented] (HIVE-4470) HS2 should disable local query
 execution
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    [ https://issues.apache.org/jira/browse/HIVE-4470?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13720379#comment-13720379 ] 

Edward Capriolo commented on HIVE-4470:
---------------------------------------

{quote}
By default, HS2 should set these parameters to disallow local execution or send and error message if user tries to set these.
{quote}
I do not agree with this. I can understand the argument for making the default off, but explicitly disabling it is too extreme. 
                
> HS2 should disable local query execution
> ----------------------------------------
>
>                 Key: HIVE-4470
>                 URL: https://issues.apache.org/jira/browse/HIVE-4470
>             Project: Hive
>          Issue Type: Bug
>          Components: HiveServer2
>            Reporter: Thejas M Nair
>
> Hive can run queries in local mode (instead of using a cluster), if the size is small. This happens when "hive.exec.mode.local.auto" is set to true.
> This would affect the stability of the hive server2 node, if you have heavy query processing happening on it. Bugs in udfs triggered by a bad record can potentially add very heavy load making the server inaccessible. 
> By default, HS2 should set these parameters to disallow local execution or send and error message if user tries to set these.

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