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From "Cliff Resnick (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HIVE-80) Allow Hive Server to run multiple queries simulteneously
Date Mon, 31 Aug 2009 03:31:32 GMT

     [ https://issues.apache.org/jira/browse/HIVE-80?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Cliff Resnick updated HIVE-80:
------------------------------

    Attachment: org.apache.hadoop.hive.ql.exec.Utilities-ThreadLocal.patch

I'm attaching a patch to org.apache.hadoop.hive.ql.exec.Utilities. Currently this class has
a static field instance of type mapredWork. Changing the reference to ThreadLocal has eliminated
the race conditions we found while executing several concurrent queries through a simple HiveConnection
pool. 


> Allow Hive Server to run multiple queries simulteneously
> --------------------------------------------------------
>
>                 Key: HIVE-80
>                 URL: https://issues.apache.org/jira/browse/HIVE-80
>             Project: Hadoop Hive
>          Issue Type: Improvement
>          Components: Server Infrastructure
>            Reporter: Raghotham Murthy
>            Assignee: Neil Conway
>            Priority: Critical
>             Fix For: 0.4.0
>
>         Attachments: hive_input_format_race-2.patch, org.apache.hadoop.hive.ql.exec.Utilities-ThreadLocal.patch
>
>
> Can use one driver object per query.

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