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