Thejas M Nair created HIVE-4574:
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Summary: 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
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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