yahoo-eng-team team mailing list archive

[Matt Riedemann <mriedem.os@xxxxxxxxx>]

This isn't a nova bug. Check your db configuration, maybe you have too
many open connections or the host running the db is overwhelmed.

** Changed in: nova
       Status: New => Invalid

-- 
You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1776894

Title:
  Lost connection to MySQL server during query

Status in OpenStack Compute (nova):
  Invalid

Bug description:
  openstack version:queens
  neutron-server and glance-api  service  log:
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines [req-d79c92f7-9fe7-49fa-9fac-4e9e34c6b01e - - - - -] Database connection was found disconnected; reconnecting: 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)
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines Traceback (most recent call last):
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines   File "/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/engines.py", line 73, in _connect_ping_listener
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines     connection.scalar(select([1]))
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines   File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 880, in scalar
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines     return self.execute(object, *multiparams, **params).scalar()
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines   File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 948, in execute
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines     return meth(self, multiparams, params)
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines   File "/usr/lib64/python2.7/site-packages/sqlalchemy/sql/elements.py", line 269, in _execute_on_connection
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines     return connection._execute_clauseelement(self, multiparams, params)
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines   File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 1060, in _execute_clauseelement
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines     compiled_sql, distilled_params
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines   File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 1200, in _execute_context
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines     context)
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines   File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 1409, in _handle_dbapi_exception
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines     util.raise_from_cause(newraise, exc_info)
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines   File "/usr/lib64/python2.7/site-packages/sqlalchemy/util/compat.py", line 203, in raise_from_cause
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines     reraise(type(exception), exception, tb=exc_tb, cause=cause)
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines   File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 1193, in _execute_context
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines     context)
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines   File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/default.py", line 507, in do_execute
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines     cursor.execute(statement, parameters)
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines   File "/usr/lib/python2.7/site-packages/pymysql/cursors.py", line 166, in execute
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines     result = self._query(query)
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines   File "/usr/lib/python2.7/site-packages/pymysql/cursors.py", line 322, in _query
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines     conn.query(q)
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines   File "/usr/lib/python2.7/site-packages/pymysql/connections.py", line 856, in query
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines     self._affected_rows = self._read_query_result(unbuffered=unbuffered)
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines   File "/usr/lib/python2.7/site-packages/pymysql/connections.py", line 1057, in _read_query_result
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines     result.read()
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines   File "/usr/lib/python2.7/site-packages/pymysql/connections.py", line 1340, in read
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines     first_packet = self.connection._read_packet()
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines   File "/usr/lib/python2.7/site-packages/pymysql/connections.py", line 987, in _read_packet
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines     packet_header = self._read_bytes(4)
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines   File "/usr/lib/python2.7/site-packages/pymysql/connections.py", line 1033, in _read_bytes
  2018-06-14 18:51:55.045 2675 ERROR oslo_db.sqlalchemy.engines     CR.CR_SERVER_LOST, "Lost connection to MySQL server during query")
  2018-06-14 18:51:55.045 2675 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)

To manage notifications about this bug go to:
https://bugs.launchpad.net/nova/+bug/1776894/+subscriptions