** Also affects: nova
Importance: Undecided
Status: New
** No longer affects: nova
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https://bugs.launchpad.net/bugs/1774544
Title:
Upgrade pike to queens get `xxx DBConnectionError SELECT 1`
Status in oslo.db:
New
Bug description:
Exception:
Database connection was found disconnected; reconnecting: DBConnectionError:
(pymysql.err.OperationalError) (2013, 'Lost connection to MySQL server during
query') [SQL: u'SELECT 1']
Log:
http://paste.openstack.org/show/722333/
Env:
centos7
kernel uname -r
3.10.0-514.26.2.el7.x86_64
Description:
Upgrading OpenStack from pike to queens almost all openstack components, such
as nova-api, nova-conductor, glance-api, neutron-server, cinder-api, get such
ERROR in log:
Database connection was found disconnected; reconnecting: DBConnectionError:
(pymysql.err.OperationalError) (2013, 'Lost connection to MySQL server during
query') [SQL: u'SELECT 1']
Checing oslo.db version, it was upgraded from 4.25 to 4.33.
Force downgrade the version from 4.33 to 4.25, the exception
disappear.
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