Тестовый пример Hyperledger Sawtooth XO зависает при выполнении

Я пытаюсь использовать Nose2-3 для запуска модульных тестов sawtooth xo tp, но код зависает. Когда я нажимаю Ctrl-C, отображается следующее. По сути, тестовый пример TP делает вызов для регистрации фиктивного валидатора, и этот вызов никогда не возвращается, потому что ZMQ Poller чего-то ждет.

Я использую Ubutnu 16 LTS, использую Python 3.5.2 и на прошлой неделе переустановил Hyperledger / sawtooth-core, поэтому я использую простую конфигурацию с последним кодом.

Что я здесь делаю не так?

Спасибо.

envoy:~/git/sawtooth-core/sdk/examples/xo_python$ nose2-3 tests.test_tp_xo
^C
----------------------------------------------------------------------
Ran 0 tests in 2.608s

OK
Traceback (most recent call last):
  File "/usr/bin/nose2-3", line 9, in <module>
    load_entry_point('nose2==0.6.4', 'console_scripts', 'nose2')()
  File "/usr/lib/python3/dist-packages/nose2/main.py", line 306, in discover
    return main(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/nose2/main.py", line 100, in __init__
    super(PluggableTestProgram, self).__init__(**kw)
  File "/usr/lib/python3.5/unittest/main.py", line 94, in __init__
    self.runTests()
  File "/usr/lib/python3/dist-packages/nose2/main.py", line 271, in runTests
    self.result = runner.run(self.test)
  File "/usr/lib/python3/dist-packages/nose2/runner.py", line 53, in run
    executor(test, result)
  File "/usr/lib/python3/dist-packages/nose2/runner.py", line 41, in <lambda>
    executor = lambda suite, result: suite(result)
  File "/usr/lib/python3.5/unittest/suite.py", line 84, in __call__
    return self.run(*args, **kwds)
  File "/usr/lib/python3.5/unittest/suite.py", line 122, in run
    test(result)
  File "/usr/lib/python3.5/unittest/suite.py", line 84, in __call__
    return self.run(*args, **kwds)
  File "/usr/lib/python3.5/unittest/suite.py", line 122, in run
    test(result)
  File "/usr/lib/python3.5/unittest/suite.py", line 84, in __call__
    return self.run(*args, **kwds)
  File "/usr/lib/python3.5/unittest/suite.py", line 122, in run
    test(result)
  File "/usr/lib/python3.5/unittest/suite.py", line 84, in __call__
    return self.run(*args, **kwds)
  File "/usr/lib/python3.5/unittest/suite.py", line 114, in run
    self._handleClassSetUp(test, result)
  File "/usr/lib/python3.5/unittest/suite.py", line 163, in _handleClassSetUp
    setUpClass()
  File "/project/git/sawtooth-core/sdk/examples/xo_python/tests/test_tp_xo.py", line 29, in setUpClass
    super().setUpClass()
  File "/usr/lib/python3/dist-packages/sawtooth_processor_test/transaction_processor_test_case.py", line 31, in setUpClass
    if not cls.validator.register_processor():
  File "/usr/lib/python3/dist-packages/sawtooth_processor_test/mock_validator.py", line 128, in register_processor
    message, ident = self.receive()
  File "/usr/lib/python3/dist-packages/sawtooth_processor_test/mock_validator.py", line 187, in receive
    self._receive()
  File "/usr/lib/python3.5/asyncio/base_events.py", line 375, in run_until_complete
    self.run_forever()
  File "/usr/lib/python3.5/asyncio/base_events.py", line 345, in run_forever
    self._run_once()
  File "/usr/lib/python3.5/asyncio/base_events.py", line 1276, in _run_once
    event_list = self._selector.select(timeout)
  File "/usr/lib/python3/dist-packages/zmq/asyncio.py", line 232, in select
    fd_event_list = self._zmq_poller.poll(timeout)
  File "/usr/lib/python3/dist-packages/zmq/sugar/poll.py", line 99, in poll
    return zmq_poll(self.sockets, timeout=timeout)
  File "zmq/backend/cython/_poll.pyx", line 115, in zmq.backend.cython._poll.zmq_poll (zmq/backend/cython/_poll.c:1705)
  File "zmq/backend/cython/checkrc.pxd", line 12, in zmq.backend.cython.checkrc._check_rc (zmq/backend/cython/_poll.c:2084)
KeyboardInterrupt