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From "Joydeep Sen Sarma (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-77) thread safe query execution
Date Tue, 02 Dec 2008 18:26:44 GMT

    [ https://issues.apache.org/jira/browse/HIVE-77?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12652448#action_12652448
] 

Joydeep Sen Sarma commented on HIVE-77:
---------------------------------------

fixed all the inline comments and moved multithreaded query harness to QTestUtil. 

> ql/src/test/org/apache/hadoop/hive/ql/QTestUtil.java:391 Where is this function called
from?
This is a temporary hack for non-DDL related metastore issues.

also - i am actually able to run TestMTqueries succesfully now. funnily all the metastore
issues are not showing up. There were some more changes required:
- randomize hadoop execution directories for local mode execution (otherwise there are collisions
when submitting jobs concurrently)
- fix taskfactory id to be threadlocal static


> thread safe query execution
> ---------------------------
>
>                 Key: HIVE-77
>                 URL: https://issues.apache.org/jira/browse/HIVE-77
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Server Infrastructure
>            Reporter: Joydeep Sen Sarma
>            Assignee: Joydeep Sen Sarma
>         Attachments: hive-77.patch.1, hive-77.patch.2, hive-77.patch.3
>
>
> this came up in hive-30 where there's a multithreaded hive server in the works. at the
minimum, the sessionstate objects should be thread local singletons. but filing a more general
bug that can cover this issue + code audit for any other static variables + test suite for
running queries from a multi-threaded environment

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