is: {'code': 500, 'created': '2025-12-11T12:05:55Z', 'message': 'No valid host was found. ', 'details': 'Traceback (most recent call last):\n File "/var/lib/kolla/venv/lib/python3.6/site-packages/nova/conductor/manager.py", line 1581, in schedule_and_build_instances\n instance_uuids, return_alternates=True)\n File "/var/lib/kolla/venv/lib/python3.6/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances\n return_alternates=return_alternates)\n File "/var/lib/kolla/venv/lib/python3.6/site-packages/nova/scheduler/client/query.py", line 42, in select_destinations\n instance_uuids, return_objects, return_alternates)\n File "/var/lib/kolla/venv/lib/python3.6/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations\n return cctxt.call(ctxt, \'select_destinations\', **msg_args)\n File "/var/lib/kolla/venv/lib/python3.6/site-packages/oslo_messaging/rpc/client.py", line 192, in call\n retry=self.retry, transport_options=self.transport_options)\n File "/var/lib/kolla/venv/lib/python3.6/site-packages/oslo_messaging/transport.py", line 128, in _send\n transport_options=transport_options)\n File "/var/lib/kolla/venv/lib/python3.6/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 691, in send\n transport_options=transport_options)\n File "/var/lib/kolla/venv/lib/python3.6/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 681, in _send\n raise result\nnova.exception_Remote.NoValidHost_Remote: No valid host was found. \nTraceback (most recent call last):\n\n File "/var/lib/kolla/venv/lib/python3.6/site-packages/oslo_messaging/rpc/server.py", line 241, in inner\n return func(*args, **kwargs)\n\n File "/var/lib/kolla/venv/lib/python3.6/site-packages/nova/scheduler/manager.py", line 209, in select_destinations\n raise exception.NoValidHost(reason="")\n\nnova.exception.NoValidHost: No valid host was found. \n\n'}
2025-12-11 12:11:22,384 - INFO - Deleting VN ctest-ext_vn-18599669
2025-12-11 12:11:22,435 - DEBUG - VN d9f18bf1-9182-4b7e-bff2-24f02b5f09bb still in use: Unable to complete operation on network d9f18bf1-9182-4b7e-bff2-24f02b5f09bb. There are one or more ports still in use on the network.
Neutron server returns request_ids: ['req-a5043dd7-ed37-4fbc-b40f-66ec3a2c8cbe']
2025-12-11 12:11:22,436 - WARNING - Deleting VN ctest-ext_vn-18599669 failed..Will retry
2025-12-11 12:11:24,551 - DEBUG - Response for deleting network ()
2025-12-11 12:11:24,551 - INFO - Deleting VN ctest-vn-44771015
2025-12-11 12:11:24,651 - DEBUG - Response for deleting network ()
2025-12-11 12:11:24,901 - ERROR - Traceback (most recent call last):
File "/contrail-test/tcutils/wrappers.py", line 80, in wrapper
result = function(self, *args, **kwargs)
File "/contrail-test/scripts/neutron/test_routers_basic.py", line 52, in test_basic_snat_behavior_without_external_connectivity
vm2_fixture.vm_ip), 'Ping from vm_left to vm_right through snat failed'
File "/contrail-test/fixtures/vm_test.py", line 354, in vm_ip
assert self.verify_vm_launched()
AssertionError
2025-12-11 12:11:24,907 - DEBUG - No XMPP flaps were noticed during the test
2025-12-11 12:11:24,907 - INFO -
2025-12-11 12:11:24,907 - INFO - END TEST : test_basic_snat_behavior_without_external_connectivity : FAILED[0:05:33]
2025-12-11 12:11:24,907 - INFO - --------------------------------------------------------------------------------
2025-12-11 12:11:25,620 - INFO - Deleted project: ctest-TestRoutersBasic-34390140, ID : 43d0afac-ab6e-4ef5-860f-af14cd8277e5