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Sergey Shelukhin commented on HIVE-14799: ----------------------------------------- +1 > 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 > Attachments: HIVE-14799.1.patch, HIVE-14799.2.patch, > HIVE-14799.3.patch, HIVE-14799.4.patch, HIVE-14799.5.patch, > HIVE-14799.5.patch, HIVE-14799.6.patch, HIVE-14799.6.patch, > HIVE-14799.7.patch, HIVE-14799.patch > > > 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)