Update to 0.36.0, I got the error info about mqtt

Hi,
I got no error in previous version.Then I updated Home Assistant to 0.36.0, I got the mqtt error info.

17-01-16 13:37:04 homeassistant.components.switch: Error while setting up platform mqtt
Traceback (most recent call last):
  File "/srv/homeassistant/lib/python3.4/site-packages/homeassistant/helpers/entity_component.py", line 151, in _async_setup_platform
    entity_platform.add_entities, discovery_info
  File "/usr/lib/python3.4/asyncio/futures.py", line 388, in __iter__
    yield self  # This tells Task to wait for completion.
  File "/usr/lib/python3.4/asyncio/tasks.py", line 286, in _wakeup
    value = future.result()
  File "/usr/lib/python3.4/asyncio/futures.py", line 277, in result
    raise self._exception
  File "/usr/lib/python3.4/concurrent/futures/thread.py", line 54, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/srv/homeassistant/lib/python3.4/site-packages/homeassistant/components/switch/mqtt.py", line 54, in setup_platform
    value_template,
  File "/srv/homeassistant/lib/python3.4/site-packages/homeassistant/components/switch/mqtt.py", line 93, in __init__
    hass, self._state_topic, message_received, self._qos)
  File "/srv/homeassistant/lib/python3.4/site-packages/homeassistant/helpers/event.py", line 26, in factory
    hass.loop, ft.partial(async_factory, *args, **kwargs)).result()
  File "/usr/lib/python3.4/concurrent/futures/_base.py", line 402, in result
    return self.__get_result()
  File "/usr/lib/python3.4/concurrent/futures/_base.py", line 354, in __get_result
    raise self._exception
  File "/srv/homeassistant/lib/python3.4/site-packages/homeassistant/util/async.py", line 167, in run_callback
    future.set_result(callback(*args))
  File "/srv/homeassistant/lib/python3.4/site-packages/homeassistant/components/mqtt/__init__.py", line 188, in async_subscribe
    MQTT_CLIENT.subscribe(topic, qos)
  File "/srv/homeassistant/lib/python3.4/site-packages/homeassistant/components/mqtt/__init__.py", line 373, in subscribe
    _raise_on_error(result)
  File "/srv/homeassistant/lib/python3.4/site-packages/homeassistant/components/mqtt/__init__.py", line 484, in _raise_on_error
    raise HomeAssistantError('Error talking to MQTT: {}'.format(result))
homeassistant.exceptions.HomeAssistantError: Error talking to MQTT: 1

Any idea?

Same error here. I was able to read one set, but after a HASS recycle I got the same error and no updates on the screen, just empty sensors.

Same errors here after updating from a working 0.35.0 to 0.37.1.

All MQTT connections were lost and can’t get them running again. Something to do with python I guess looking at the errors.

I encountered this issue when trying to set up mqtt on 0.38.3