** Changed in: nova/juno Status: Fix Committed => Fix Released -- 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/1375467
Title: db deadlock on _instance_update() Status in OpenStack Compute (Nova): Fix Committed Status in OpenStack Compute (nova) juno series: Fix Released Bug description: continuing from the same pattern as that of https://bugs.launchpad.net/nova/+bug/1370191, we are also observing unhandled deadlocks on derivatives of _instance_update(), such as the stacktrace below. As _instance_update() is a point of transaction demarcation based on its use of get_session(), the @_retry_on_deadlock should be added to this method. Traceback (most recent call last): File "/usr/lib/python2.7/site-packages/oslo/messaging/rpc/dispatcher.py", line 133, in _dispatch_and_reply\ incoming.message))\ File "/usr/lib/python2.7/site-packages/oslo/messaging/rpc/dispatcher.py", line 176, in _dispatch\ return self._do_dispatch(endpoint, method, ctxt, args)\ File "/usr/lib/python2.7/site-packages/oslo/messaging/rpc/dispatcher.py", line 122, in _do_dispatch\ result = getattr(endpoint, method)(ctxt, **new_args)\ File "/usr/lib/python2.7/site-packages/nova/conductor/manager.py", line 887, in instance_update\ service)\ File "/usr/lib/python2.7/site-packages/oslo/messaging/rpc/server.py", line 139, in inner\ return func(*args, **kwargs)\ File "/usr/lib/python2.7/site-packages/nova/conductor/manager.py", line 130, in instance_update\ context, instance_uuid, updates)\ File "/usr/lib/python2.7/site-packages/nova/db/api.py", line 742, in instance_update_and_get_original\ columns_to_join=columns_to_join)\ File "/usr/lib/python2.7/site-packages/nova/db/sqlalchemy/api.py", line 164, in wrapper\ return f(*args, **kwargs)\ File "/usr/lib/python2.7/site-packages/nova/db/sqlalchemy/api.py", line 2208, in instance_update_and_get_original\ columns_to_join=columns_to_join)\ File "/usr/lib/python2.7/site-packages/nova/db/sqlalchemy/api.py", line 2299, in _instance_update\ session.add(instance_ref)\ File "/usr/lib64/python2.7/site-packages/sqlalchemy/orm/session.py", line 447, in __exit__\ self.rollback()\ File "/usr/lib64/python2.7/site-packages/sqlalchemy/util/langhelpers.py", line 58, in __exit__\ compat.reraise(exc_type, exc_value, exc_tb)\ File "/usr/lib64/python2.7/site-packages/sqlalchemy/orm/session.py", line 444, in __exit__\ self.commit()\ File "/usr/lib/python2.7/site-packages/nova/openstack/common/db/sqlalchemy/sessi on.py", line 443, in _wrap\ _raise_if_deadlock_error(e, self.bind.dialect.name)\ File "/usr/lib/python2.7/site-packages/nova/openstack/common/db/sqlalchemy/sessi on.py", line 427, in _raise_if_deadlock_error\ raise exception.DBDeadlock(operational_error)\ DBDeadlock: (OperationalError) (1213, \'Deadlock found when trying to get lock; try restarting transaction\') None None\ To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/1375467/+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