** Also affects: neutron/kilo
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1424593
Title:
ObjectDeleted error when network already removed during rescheduling
Status in neutron:
Fix Released
Status in neutron kilo series:
New
Bug description:
In some cases when concurrent rescheduling occurs, the following trace
is observed:
ERROR neutron.openstack.common.loopingcall [-] in fixed duration looping call
TRACE neutron.openstack.common.loopingcall Traceback (most recent call last):
TRACE neutron.openstack.common.loopingcall File
"/usr/lib/python2.7/dist-packages/neutron/openstack/common/loopingcall.py",
line 76, in _inner
TRACE neutron.openstack.common.loopingcall self.f(*self.args, **self.kw)
TRACE neutron.openstack.common.loopingcall File
"/usr/lib/python2.7/dist-packages/neutron/db/agentschedulers_db.py", line 269,
in remove_networks_from_down_agents
TRACE neutron.openstack.common.loopingcall {'net': binding.network_id,
TRACE neutron.openstack.common.loopingcall File
"/usr/lib/python2.7/dist-packages/sqlalchemy/orm/attributes.py", line 239, in
__get__
TRACE neutron.openstack.common.loopingcall return
self.impl.get(instance_state(instance), dict_)
TRACE neutron.openstack.common.loopingcall File
"/usr/lib/python2.7/dist-packages/sqlalchemy/orm/attributes.py", line 589, in
get
TRACE neutron.openstack.common.loopingcall value = callable_(state,
passive)
TRACE neutron.openstack.common.loopingcall File
"/usr/lib/python2.7/dist-packages/sqlalchemy/orm/state.py", line 424, in
__call__
TRACE neutron.openstack.common.loopingcall
self.manager.deferred_scalar_loader(self, toload)
TRACE neutron.openstack.common.loopingcall File
"/usr/lib/python2.7/dist-packages/sqlalchemy/orm/loading.py", line 614, in
load_scalar_attributes
TRACE neutron.openstack.common.loopingcall raise
orm_exc.ObjectDeletedError(state)
TRACE neutron.openstack.common.loopingcall ObjectDeletedError: Instance
'<NetworkDhcpAgentBinding at 0x52b1850>' has been deleted, or its row is
otherwise not present.
Need to avoid accessing db object after it has been deleted from db as
attribute access may trigger this exception.
This issue terminates periodic task of rescheduling networks.
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