b'2019-12-03 22:35:14,048 ERROR [root] Original exception being dropped: [\'Traceback (most recent call last):\\n\', \'  File "/home/zuul/src/opendev.org/openstack/nova/.tox/functional-py36/lib/python3.6/site-packages/oslo_messaging/_drivers/impl_fake.py", line 208, in _send\\n    reply, failure = reply_q.get(timeout=timeout)\\n\', \'  File "/home/zuul/src/opendev.org/openstack/nova/.tox/functional-py36/lib/python3.6/site-packages/eventlet/queue.py", line 322, in get\\n    return waiter.wait()\\n\', \'  File "/home/zuul/src/opendev.org/openstack/nova/.tox/functional-py36/lib/python3.6/site-packages/eventlet/queue.py", line 141, in wait\\n    return get_hub().switch()\\n\', \'  File "/home/zuul/src/opendev.org/openstack/nova/.tox/functional-py36/lib/python3.6/site-packages/eventlet/hubs/hub.py", line 298, in switch\\n    return self.greenlet.switch()\\n\', \'queue.Empty\\n\', \'\\nDuring handling of the above exception, another exception occurred:\\n\\n\', \'Traceback (most recent call last):\\n\', \'  File "/home/zuul/src/opendev.org/openstack/nova/nova/compute/manager.py", line 206, in decorated_function\\n    return function(self, context, *args, **kwargs)\\n\', \'  File "/home/zuul/src/opendev.org/openstack/nova/nova/compute/manager.py", line 2292, in _do_build_and_run_instance\\n    host_lists=[host_list])\\n\', \'  File "/home/zuul/src/opendev.org/openstack/nova/nova/conductor/api.py", line 127, in build_instances\\n    host_lists=host_lists)\\n\', \'  File "/home/zuul/src/opendev.org/openstack/nova/nova/conductor/rpcapi.py", line 390, in build_instances\\n    cctxt.cast(context, \\\'build_instances\\\', **kwargs)\\n\', \'  File "/home/zuul/src/opendev.org/openstack/nova/.tox/functional-py36/lib/python3.6/site-packages/fixtures/_fixtures/monkeypatch.py", line 89, in avoid_get\\n    return captured_method(*args, **kwargs)\\n\', \'  File "/home/zuul/src/opendev.org/openstack/nova/.tox/functional-py36/lib/python3.6/site-packages/oslo_messaging/rpc/client.py", line 181, in call\\n    transport_options=self.transport_options)\\n\', \'  File "/home/zuul/src/opendev.org/openstack/nova/.tox/functional-py36/lib/python3.6/site-packages/oslo_messaging/transport.py", line 129, in _send\\n    transport_options=transport_options)\\n\', \'  File "/home/zuul/src/opendev.org/openstack/nova/.tox/functional-py36/lib/python3.6/site-packages/oslo_messaging/_drivers/impl_fake.py", line 224, in send\\n    transport_options)\\n\', \'  File "/home/zuul/src/opendev.org/openstack/nova/.tox/functional-py36/lib/python3.6/site-packages/oslo_messaging/_drivers/impl_fake.py", line 215, in _send\\n    \\\'No reply on topic %s\\\' % target.topic)\\n\', \'oslo_messaging.exceptions.MessagingTimeout: No reply on topic conductor\\n\']'