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https://issues.apache.org/jira/browse/HIVE-4574?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thejas M Nair updated HIVE-4574:
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Attachment: HIVE-4574.1.patch
HIVE-4574.1.patch - Synchronizes calls to XMLEncoder in Utilities.java. That is
the only place I see XMLEncoder or java beans being called directly from hive.
Need to look at ways to do this only for the jdk versions with this bug.
> XMLEncoder thread safety issues in openjdk7 causes HiveServer2 to be stuck
> --------------------------------------------------------------------------
>
> Key: HIVE-4574
> URL: https://issues.apache.org/jira/browse/HIVE-4574
> Project: Hive
> Issue Type: Bug
> Components: HiveServer2
> Affects Versions: 0.11.0
> Reporter: Thejas M Nair
> Assignee: Thejas M Nair
> Attachments: HIVE-4574.1.patch
>
>
> In open jdk7, XMLEncoder.writeObject call leads to calls to
> java.beans.MethodFinder.findMethod(). MethodFinder class not thread safe
> because it uses a static WeakHashMap that would get used from multiple
> threads. See -
> http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/7-b147/com/sun/beans/finder/MethodFinder.java#46
> Concurrent access to HashMap implementation that are not thread safe can
> sometimes result in infinite-loops and other problems. If jdk7 is in use, it
> makes sense to synchronize calls to XMLEncoder.writeObject .
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