Chaoyu Tang created HIVE-14799:
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Summary: Query operation are not thread safe during its
cancellation
Key: HIVE-14799
URL: https://issues.apache.org/jira/browse/HIVE-14799
Project: Hive
Issue Type: Bug
Components: HiveServer2
Reporter: Chaoyu Tang
Assignee: Chaoyu Tang
When a query is cancelled either via Beeline (Ctrl-C) or API call
TCLIService.Client.CancelOperation, SQLOperation.cancel is invoked in a
different thread from that running the query to close/destroy its encapsulated
Driver object. Both SQLOperation and Driver are not thread-safe which could
sometimes result in Runtime exceptions like NPE. The errors from the running
query are not handled properly therefore probably causing some stuffs (files,
locks etc) not being cleaned after the query termination.
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