Public bug reported: many of neutron code seems to be written without considering the reuse of session and its associated object cache.
it's a problem for UTs where admin context (and thus its session) is reused heavily. here's an example of the failure [1]. but there might be non-test code possibly affected. switching to expire_on_commit=True might improve the situation. but it doesn't entirely solve the problem because some of read-only queries are done without explicit transactions. [1] http://logs.openstack.org/82/158182/5/check/gate-neutron-python27/402b450/ Traceback (most recent call last): File "neutron/tests/unit/plugins/ml2/drivers/l2pop/test_mech_driver.py", line 864, in test_host_changed_twice mock.ANY, 'remove_fdb_entries', expected) File "/home/jenkins/workspace/gate-neutron-python27/.tox/py27/local/lib/python2.7/site-packages/mock.py", line 831, in assert_called_with raise AssertionError('Expected call: %s\nNot called' % (expected,)) AssertionError: Expected call: _notification_fanout(<ANY>, 'remove_fdb_entries', {u'58de62e4-5001-485b-a334-b65c3da97745': {'segment_id': 1, 'ports': {'20.0.0.1': [('00:00:00:00:00:00', '0.0.0.0'), PortInfo(mac_address=u'12:34:56:78:fa:4a', ip_address=u'10.0.0.2')]}, 'network_type': 'vxlan'}}) Not called ** Affects: neutron Importance: Undecided Status: New -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to neutron. https://bugs.launchpad.net/bugs/1441488 Title: stale db objects due to session reuse Status in OpenStack Neutron (virtual network service): New Bug description: many of neutron code seems to be written without considering the reuse of session and its associated object cache. it's a problem for UTs where admin context (and thus its session) is reused heavily. here's an example of the failure [1]. but there might be non-test code possibly affected. switching to expire_on_commit=True might improve the situation. but it doesn't entirely solve the problem because some of read-only queries are done without explicit transactions. [1] http://logs.openstack.org/82/158182/5/check/gate-neutron-python27/402b450/ Traceback (most recent call last): File "neutron/tests/unit/plugins/ml2/drivers/l2pop/test_mech_driver.py", line 864, in test_host_changed_twice mock.ANY, 'remove_fdb_entries', expected) File "/home/jenkins/workspace/gate-neutron-python27/.tox/py27/local/lib/python2.7/site-packages/mock.py", line 831, in assert_called_with raise AssertionError('Expected call: %s\nNot called' % (expected,)) AssertionError: Expected call: _notification_fanout(<ANY>, 'remove_fdb_entries', {u'58de62e4-5001-485b-a334-b65c3da97745': {'segment_id': 1, 'ports': {'20.0.0.1': [('00:00:00:00:00:00', '0.0.0.0'), PortInfo(mac_address=u'12:34:56:78:fa:4a', ip_address=u'10.0.0.2')]}, 'network_type': 'vxlan'}}) Not called To manage notifications about this bug go to: https://bugs.launchpad.net/neutron/+bug/1441488/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : yahoo-eng-team@lists.launchpad.net Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
