Nemon Lou created HIVE-12689:
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Summary: Support multiple spark sessions in one Hive Session
Key: HIVE-12689
URL: https://issues.apache.org/jira/browse/HIVE-12689
Project: Hive
Issue Type: Improvement
Components: Spark
Reporter: Nemon Lou
As discussed in HIVE-12538,in case of one Hive Connection been used
concurrently,there should be more than one spark sessions for that connection.
{quote}
A hive session may "own" more than one spark session in case of asynchronous
queries. If a spark session is live (used to run a spark job), that spark
session will not be used to run the next job. Therefore, whenever whenever a
spark configuration change is detected in Hive session, we need to mark all the
live Spark sessions as outdated. When we are getting a session from the pool
and check if the flag is set, then we destroy it and get a new one.
{quote}
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