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From "Xuefu Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-16183) Fix potential thread safety issues with static variables
Date Wed, 15 Mar 2017 22:02:41 GMT

     [ https://issues.apache.org/jira/browse/HIVE-16183?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Xuefu Zhang updated HIVE-16183:
-------------------------------
    Attachment: HIVE-16183.4.patch

> Fix potential thread safety issues with static variables
> --------------------------------------------------------
>
>                 Key: HIVE-16183
>                 URL: https://issues.apache.org/jira/browse/HIVE-16183
>             Project: Hive
>          Issue Type: Bug
>          Components: HiveServer2
>            Reporter: Xuefu Zhang
>            Assignee: Xuefu Zhang
>         Attachments: HIVE-16183.1.patch, HIVE-16183.2.patch, HIVE-16183.3.patch, HIVE-16183.4.patch,
HIVE-16183.patch
>
>
> Many concurrency issues (HIVE-12768, HIVE-16175, HIVE-16060) have been found with respect
to class static variable usages. With fact that HS2 supports concurrent compilation and task
execution as well as some backend engines (such as Spark) running multiple tasks in a single
JVM, traditional assumption (or mindset) of single threaded execution needs to be abandoned.
> This purpose of this JIRA is to do a global scan of static variables in Hive code base,
and correct potential thread-safety issues. However, it's not meant to be exhaustive.



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