Zhan Zhang created SPARK-4103:
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Summary: Clean up SessionState in HiveContext
Key: SPARK-4103
URL: https://issues.apache.org/jira/browse/SPARK-4103
Project: Spark
Issue Type: Bug
Components: SQL
Reporter: Zhan Zhang
Currently the sessionState in HiveContext is lazy, and to start the session,
SessionState.start() has to be invoked to initialize it. Using ThreadLocal
variable natively in hive to track the availability of SessionState and
initialize it if required. It avoid multiple thread share the same SessionState
and single thread invoke SessionState.start with the same SessionState multiple
times, which seems to cause unexpected behavior.
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