Test test_create_router_with_snat_explicit is failing on deletion of router. Error in neutron is like below: 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource [req-65833112-d708-47f3-8227-3261cfda5af2 686c30b80c1f4583ae8a5e1c84141d0e 5d9cee455cbe479d8348db77f44c7553 - default default] delete failed: No details.: InvalidRequestError: Could not refresh instance '' 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource Traceback (most recent call last): 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/neutron/api/v2/resource.py", line 98, in resource 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource result = method(request=request, **args) 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/neutron/api/v2/base.py", line 567, in delete 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource return self._delete(request, id, **kwargs) 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/neutron_lib/db/api.py", line 139, in wrapped 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource setattr(e, '_RETRY_EXCEEDED', True) 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__ 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource self.force_reraise() 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource six.reraise(self.type_, self.value, self.tb) 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/neutron_lib/db/api.py", line 135, in wrapped 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource return f(*args, **kwargs) 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/oslo_db/api.py", line 154, in wrapper 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource ectxt.value = e.inner_exc 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__ 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource self.force_reraise() 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource six.reraise(self.type_, self.value, self.tb) 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/oslo_db/api.py", line 142, in wrapper 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource return f(*args, **kwargs) 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/neutron_lib/db/api.py", line 183, in wrapped 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource LOG.debug("Retry wrapper got retriable exception: %s", e) 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__ 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource self.force_reraise() 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource six.reraise(self.type_, self.value, self.tb) 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/neutron_lib/db/api.py", line 179, in wrapped 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource return f(*dup_args, **dup_kwargs) 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/neutron/api/v2/base.py", line 595, in _delete 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource obj_deleter(request.context, id, **kwargs) 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/networking_ovn/l3/l3_ovn.py", line 152, in delete_router 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource super(OVNL3RouterPlugin, self).delete_router(context, id) 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/neutron/db/l3_db.py", line 2005, in delete_router 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource super(L3_NAT_db_mixin, self).delete_router(context, id) 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/neutron_lib/db/api.py", line 233, in wrapped 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource return method(*args, **kwargs) 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/neutron_lib/db/api.py", line 139, in wrapped 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource setattr(e, '_RETRY_EXCEEDED', True) 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__ 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource self.force_reraise() 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource six.reraise(self.type_, self.value, self.tb) 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/neutron_lib/db/api.py", line 135, in wrapped 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource return f(*args, **kwargs) 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/oslo_db/api.py", line 154, in wrapper 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource ectxt.value = e.inner_exc 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__ 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource self.force_reraise() 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource six.reraise(self.type_, self.value, self.tb) 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/oslo_db/api.py", line 142, in wrapper 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource return f(*args, **kwargs) 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/neutron_lib/db/api.py", line 183, in wrapped 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource LOG.debug("Retry wrapper got retriable exception: %s", e) 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__ 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource self.force_reraise() 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource six.reraise(self.type_, self.value, self.tb) 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/neutron_lib/db/api.py", line 179, in wrapped 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource return f(*dup_args, **dup_kwargs) 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/neutron/db/l3_db.py", line 570, in delete_router 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource context.session.refresh(router) 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource File "/usr/lib64/python2.7/site-packages/sqlalchemy/orm/session.py", line 1670, in refresh 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource "Could not refresh instance '%s'" % instance_str(instance) 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource InvalidRequestError: Could not refresh instance '' 2019-12-02 08:03:41.019 28 ERROR neutron.api.v2.resource 2019-12-02 08:03:41.028 28 INFO neutron.wsgi [req-65833112-d708-47f3-8227-3261cfda5af2 686c30b80c1f4583ae8a5e1c84141d0e 5d9cee455cbe479d8348db77f44c7553 - default default] 172.17.0.212 "DELETE /v2.0/routers/999a82de-4b0d-4e5d-851c-bf07d84f452d HTTP/1.1" status: 500 len: 363 time: 33.0280960 But I'm not sure if that may be neutron or networking-ovn issue. But we don't see anything similar in neutron gate where ML2/ovs backend is used.