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From "Carl Steinbach (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-2022) Making JDO thread-safe by default
Date Thu, 03 Mar 2011 04:19:36 GMT

    [ https://issues.apache.org/jira/browse/HIVE-2022?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13001857#comment-13001857
] 

Carl Steinbach commented on HIVE-2022:
--------------------------------------

This patch broke TestEmbeddedHiveMetaStore and TestRemoteHiveMetaStore: https://hudson.apache.org/hudson/job/Hive-trunk-h0.20/590/

@Paul: Please don't backport this to 0.7.0


> Making JDO thread-safe by default
> ---------------------------------
>
>                 Key: HIVE-2022
>                 URL: https://issues.apache.org/jira/browse/HIVE-2022
>             Project: Hive
>          Issue Type: Bug
>          Components: Configuration, Metastore
>            Reporter: Ning Zhang
>            Assignee: Ning Zhang
>             Fix For: 0.8.0
>
>         Attachments: HIVE-2022.patch
>
>
> If there are multiple thread accessing metastore concurrently, there are cases that JDO
threw exceptions because of concurrent access of HashMap inside JDO. Setting javax.jdo.option.Multithreaded
to true solves this issue. 

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