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From "Ashish Thusoo (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-77) thread safe query execution
Date Tue, 02 Dec 2008 02:53:44 GMT

    [ https://issues.apache.org/jira/browse/HIVE-77?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12652247#action_12652247
] 

Ashish Thusoo commented on HIVE-77:
-----------------------------------

@Joy

I meant rolling up the TestMTQueries into QTestUtil so that we just have a single tool to
deal with when it comes to query testing.

%t as suggested by Edward should work for now. Later when we expand this so that a thread
is able to handle multiple sessions (a requirement on JDBC) we can start exploring NDC and
MDCs to log thread specific information.

> 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
>
>
> 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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