Public bug reported:
DetachedInstanceError occures when logging "dhcp port was deleted
concurrently" and accessing db object while it was already expunged from
session. Code in question:
def _delete_ports(self, context, ports):
for port in ports:
try:
self.delete_port(context, port.id)
except (exc.PortNotFound, sa_exc.ObjectDeletedError):
context.session.expunge(port)
# concurrent port deletion can be performed by
# release_dhcp_port caused by concurrent subnet_delete
LOG.info(_LI("Port %s was deleted concurrently"), port.id)
Traceback:
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource Traceback (most
recent call last):
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource File
"/usr/lib/python2.7/dist-packages/neutron/api/v2/resource.py", line 83, in
resource
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource result =
method(request=request, **args)
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource File
"/usr/lib/python2.7/dist-packages/neutron/api/v2/base.py", line 490, in delete
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource
obj_deleter(request.context, id, **kwargs)
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource File
"/usr/lib/python2.7/dist-packages/neutron/plugins/ml2/plugin.py", line 775, in
delete_network
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource
self._delete_ports(context, ports)
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource File
"/usr/lib/python2.7/dist-packages/neutron/plugins/ml2/plugin.py", line 686, in
_delete_ports
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource
LOG.info(_LI("Port %s was deleted concurrently"), port.id)
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource File
"/usr/lib/python2.7/dist-packages/sqlalchemy/orm/attributes.py", line 239, in
__get__
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource return
self.impl.get(instance_state(instance), dict_)
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource File
"/usr/lib/python2.7/dist-packages/sqlalchemy/orm/attributes.py", line 589, in
get
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource value =
callable_(state, passive)
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource File
"/usr/lib/python2.7/dist-packages/sqlalchemy/orm/state.py", line 424, in
__call__
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource
self.manager.deferred_scalar_loader(self, toload)
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource File
"/usr/lib/python2.7/dist-packages/sqlalchemy/orm/loading.py", line 563, in
load_scalar_attributes
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource
(state_str(state)))
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource
DetachedInstanceError: Instance <Port at 0x7f8f7d544dd0> is not bound to a
Session; attribute refresh operation cannot proceed
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource
2015-08-12T09:26:42.990805+00:00 info: 2015-08-12 09:26:42.987 4250 INFO
neutron.wsgi [req-2bbc2b06-40f1-41e7-a230-3026ea94414d ] 10.109.2.3 - -
[12/Aug/2015 09:26:42] "DELETE
/v2.0/networks/a3322fce-2fc9-4be3-88d7-ba1d4f4294df.json HTTP/1.1" 500 378
0.938119
** Affects: neutron
Importance: High
Assignee: Oleg Bondarev (obondarev)
Status: Confirmed
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https://bugs.launchpad.net/bugs/1484135
Title:
DetachedInstanceError on network delete
Status in neutron:
Confirmed
Bug description:
DetachedInstanceError occures when logging "dhcp port was deleted
concurrently" and accessing db object while it was already expunged
from session. Code in question:
def _delete_ports(self, context, ports):
for port in ports:
try:
self.delete_port(context, port.id)
except (exc.PortNotFound, sa_exc.ObjectDeletedError):
context.session.expunge(port)
# concurrent port deletion can be performed by
# release_dhcp_port caused by concurrent subnet_delete
LOG.info(_LI("Port %s was deleted concurrently"), port.id)
Traceback:
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource Traceback (most
recent call last):
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource File
"/usr/lib/python2.7/dist-packages/neutron/api/v2/resource.py", line 83, in
resource
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource result =
method(request=request, **args)
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource File
"/usr/lib/python2.7/dist-packages/neutron/api/v2/base.py", line 490, in delete
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource
obj_deleter(request.context, id, **kwargs)
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource File
"/usr/lib/python2.7/dist-packages/neutron/plugins/ml2/plugin.py", line 775, in
delete_network
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource
self._delete_ports(context, ports)
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource File
"/usr/lib/python2.7/dist-packages/neutron/plugins/ml2/plugin.py", line 686, in
_delete_ports
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource
LOG.info(_LI("Port %s was deleted concurrently"), port.id)
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource File
"/usr/lib/python2.7/dist-packages/sqlalchemy/orm/attributes.py", line 239, in
__get__
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource return
self.impl.get(instance_state(instance), dict_)
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource File
"/usr/lib/python2.7/dist-packages/sqlalchemy/orm/attributes.py", line 589, in
get
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource value =
callable_(state, passive)
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource File
"/usr/lib/python2.7/dist-packages/sqlalchemy/orm/state.py", line 424, in
__call__
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource
self.manager.deferred_scalar_loader(self, toload)
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource File
"/usr/lib/python2.7/dist-packages/sqlalchemy/orm/loading.py", line 563, in
load_scalar_attributes
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource
(state_str(state)))
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource
DetachedInstanceError: Instance <Port at 0x7f8f7d544dd0> is not bound to a
Session; attribute refresh operation cannot proceed
2015-08-12 09:26:42.976 4250 TRACE neutron.api.v2.resource
2015-08-12T09:26:42.990805+00:00 info: 2015-08-12 09:26:42.987 4250 INFO
neutron.wsgi [req-2bbc2b06-40f1-41e7-a230-3026ea94414d ] 10.109.2.3 - -
[12/Aug/2015 09:26:42] "DELETE
/v2.0/networks/a3322fce-2fc9-4be3-88d7-ba1d4f4294df.json HTTP/1.1" 500 378
0.938119
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