Github user jinfengni commented on the issue:
https://github.com/apache/drill/pull/543
@vkorukanti , thanks for pointing the place it might leaking. I'll revise
the patch.
Agree with @sudheeshkatkam that HiveStoragePlugin may leak connection (I
saw Drill leaked a connection, when HiveStoragePlugin conf is updated each
time). Since @sudheeshkatkam opened DRILL-4774, it would be addressed in
DRILL-4774.
The fix Sudheesh identified is in later version of Hive. Unless we move
Drill's dependency forward, we need find some way to fix leaking for now. Also,
when the hive client call hit tableNotFound / tableNotAccessible error, Drill
does not have to reconnect.
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