Hit another failure in a unit test job that failed and dumped a ton into the console log:

http://logs.openstack.org/27/619527/16/gate/openstack-tox-lower-constraints/cd2889d/job-output.txt.gz#_2019-02-08_12_32_26_095767

I'm not exactly sure what is causing it, but there is a ton of this in the logs:

2019-02-08 12:32:26.104934 | ubuntu-xenial |     b'2019-02-08 12:32:17,445 ERROR [oslo_messaging.rpc.server] Exception during message handling'
2019-02-08 12:32:26.105103 | ubuntu-xenial |     b'Traceback (most recent call last):'
2019-02-08 12:32:26.105596 | ubuntu-xenial |     b'  File "/home/zuul/src/git.openstack.org/openstack/nova/.tox/lower-constraints/lib/python3.5/site-packages/oslo_messaging/rpc/server.py", line 166, in _process_incoming'
2019-02-08 12:32:26.105775 | ubuntu-xenial |     b'    res = self.dispatcher.dispatch(message)'
2019-02-08 12:32:26.106238 | ubuntu-xenial |     b'  File "/home/zuul/src/git.openstack.org/openstack/nova/.tox/lower-constraints/lib/python3.5/site-packages/oslo_messaging/rpc/dispatcher.py", line 265, in dispatch'
2019-02-08 12:32:26.106450 | ubuntu-xenial |     b'    return self._do_dispatch(endpoint, method, ctxt, args)'
2019-02-08 12:32:26.106919 | ubuntu-xenial |     b'  File "/home/zuul/src/git.openstack.org/openstack/nova/.tox/lower-constraints/lib/python3.5/site-packages/oslo_messaging/rpc/dispatcher.py", line 189, in _do_dispatch'
2019-02-08 12:32:26.107114 | ubuntu-xenial |     b'    ctxt = self.serializer.deserialize_context(ctxt)'
2019-02-08 12:32:26.107452 | ubuntu-xenial |     b'  File "/home/zuul/src/git.openstack.org/openstack/nova/nova/tests/fixtures.py", line 392, in deserialize_context'
2019-02-08 12:32:26.107689 | ubuntu-xenial |     b'    ctxt = super(CheatingSerializer, self).deserialize_context(values)'
2019-02-08 12:32:26.108147 | ubuntu-xenial |     b'  File "/home/zuul/src/git.openstack.org/openstack/nova/.tox/lower-constraints/lib/python3.5/site-packages/fixtures/_fixtures/monkeypatch.py", line 89, in avoid_get'
2019-02-08 12:32:26.108323 | ubuntu-xenial |     b'    return captured_method(*args, **kwargs)'
2019-02-08 12:32:26.108727 | ubuntu-xenial |     b'  File "/home/zuul/src/git.openstack.org/openstack/nova/nova/tests/unit/conductor/test_conductor.py", line 124, in fake_deserialize_context'
2019-02-08 12:32:26.108959 | ubuntu-xenial |     b"    self.assertEqual(self.context.user_id, ctxt_dict['user_id'])"
2019-02-08 12:32:26.109406 | ubuntu-xenial |     b'  File "/home/zuul/src/git.openstack.org/openstack/nova/.tox/lower-constraints/lib/python3.5/site-packages/testtools/testcase.py", line 411, in assertEqual'
2019-02-08 12:32:26.121688 | ubuntu-xenial |     b'    self.assertThat(observed, matcher, message)'
2019-02-08 12:32:26.122010 | ubuntu-xenial |     b'  File "/home/zuul/src/git.openstack.org/openstack/nova/.tox/lower-constraints/lib/python3.5/site-packages/testtools/testcase.py", line 498, in assertThat'
2019-02-08 12:32:26.122098 | ubuntu-xenial |     b'    raise mismatch_error'
2019-02-08 12:32:26.122297 | ubuntu-xenial |     b"testtools.matchers._impl.MismatchError: '5fae60f5cf4642609ddd31f71748beac' != 'fake_user'"

It seems that those assertions don't actually cause failures in the tests, but they do spew into the logs which is contributing to the subunit parser failures.