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  1. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines [req-9db27dee-c613-4b15-a805-383f3fdf06f6 aeccafafcf7b4251ba1f321e3b8049fb e87c9f038ddc48d882c3859c0684da78 - default default]
  2. Database connection was found disconnected; reconnecting: DBConnectionError: (pymysql.err.OperationalError) (2013, 'Lost connection to MySQL server during query') [SQL: u'SELECT 1'] (Backg
  3. round on this error at: http://sqlalche.me/e/e3q8)
  4. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines Traceback (most recent call last):
  5. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines File "/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/engines.py", line 73, in _connect_ping_listener
  6. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines connection.scalar(select([1]))
  7. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 880, in scalar
  8. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines return self.execute(object, *multiparams, **params).scalar()
  9. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 948, in execute
  10. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines return meth(self, multiparams, params)
  11. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines File "/usr/lib64/python2.7/site-packages/sqlalchemy/sql/elements.py", line 269, in _execute_on_connection
  12. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines return connection._execute_clauseelement(self, multiparams, params)
  13. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 1060, in _execute_clauseelement
  14. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines compiled_sql, distilled_params
  15. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 1200, in _execute_context
  16. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines context)
  17. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 1409, in _handle_dbapi_exception
  18. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines util.raise_from_cause(newraise, exc_info)
  19. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines File "/usr/lib64/python2.7/site-packages/sqlalchemy/util/compat.py", line 203, in raise_from_cause
  20. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines reraise(type(exception), exception, tb=exc_tb, cause=cause)
  21. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 1193, in _execute_context
  22. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines context)
  23. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/default.py", line 507, in do_execute
  24. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines cursor.execute(statement, parameters)
  25. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines File "/usr/lib/python2.7/site-packages/pymysql/cursors.py", line 166, in execute
  26. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines result = self._query(query)
  27. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines File "/usr/lib/python2.7/site-packages/pymysql/cursors.py", line 322, in _query
  28. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines conn.query(q)
  29. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines File "/usr/lib/python2.7/site-packages/pymysql/connections.py", line 856, in query
  30. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines self._affected_rows = self._read_query_result(unbuffered=unbuffered)
  31. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines File "/usr/lib/python2.7/site-packages/pymysql/connections.py", line 1057, in _read_query_result
  32. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines result.read()
  33. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines File "/usr/lib/python2.7/site-packages/pymysql/connections.py", line 1340, in read
  34. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines first_packet = self.connection._read_packet()
  35. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines File "/usr/lib/python2.7/site-packages/pymysql/connections.py", line 987, in _read_packet
  36. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines packet_header = self._read_bytes(4)
  37. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines File "/usr/lib/python2.7/site-packages/pymysql/connections.py", line 1033, in _read_bytes
  38. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines CR.CR_SERVER_LOST, "Lost connection to MySQL server during query")
  39. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines DBConnectionError: (pymysql.err.OperationalError) (2013, 'Lost connection to MySQL server during query') [SQL: u'SELECT 1'] (Background on this error at: http://sqlalche.me/e/e3q8)
  40. 2018-06-19 14:54:11.999 22261 ERROR oslo_db.sqlalchemy.engines
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