Syed Shameerur Rahman created HIVE-26467:
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             Summary: SessionState should be accessible inside ThreadPool
                 Key: HIVE-26467
                 URL: https://issues.apache.org/jira/browse/HIVE-26467
             Project: Hive
          Issue Type: Improvement
            Reporter: Syed Shameerur Rahman
            Assignee: Syed Shameerur Rahman
             Fix For: 4.0.0


Currently SessionState.get() returns null if it is called inside a ThreadPool. 
If there is any custom third party component leverages SessionState.get() for 
some operations like getting the session state or session config it will result 
in null since session state is thread local 
(https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/session/SessionState.java#L622)
 and ThreadLocal variable are not inheritable to child threads / thread pools.

So one solution is to make the thread local variable inheritable so the 
SessionState gets propagated to child threads.



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