graceguo-supercat commented on issue #8139: [sqllab] add retries for stop_query URL: https://github.com/apache/incubator-superset/pull/8139#issuecomment-526688161 This PR is trying to fix the errors like this: > This Session's transaction has been rolled back due to a previous exception during flush. To begin a new transaction with this Session, first issue Session.rollback(). Original exception was: (_mysql_exceptions.OperationalError) (1205, 'Lock wait timeout exceeded; try restarting transaction')[SQL: UPDATE query SET status=%s, changed_on=%s WHERE query.id = %s][parameters: ('stopped', datetime.datetime(2019, 8, 30, 17, 33, 25, 363177), 4180054)](Background on this error at: http://sqlalche.me/e/e3q8) (Background on this error at: http://sqlalche.me/e/7s2a)
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