Trouble using gunicorn with Hug

(This is in a Docker environment. I haven't tested it locally)

hug-gunicorn: [2018-12-28 01:34:44 +0000] [10] [INFO] Starting gunicorn 19.9.0
hug-gunicorn: [2018-12-28 01:34:44 +0000] [10] [INFO] Listening at: http://0.0.0.0:8080 (10)
hug-gunicorn: [2018-12-28 01:34:44 +0000] [10] [INFO] Using worker: meinheld.gmeinheld.MeinheldWorker
hug-gunicorn: [2018-12-28 01:34:44 +0000] [13] [INFO] Booting worker with pid: 13
hug-gunicorn: [2018-12-28 01:34:44 +0000] [14] [INFO] Booting worker with pid: 14
hug-gunicorn: [2018-12-28 01:34:45 +0000] [15] [INFO] Booting worker with pid: 15
hug-gunicorn: [2018-12-28 01:34:45 +0000] [16] [INFO] Booting worker with pid: 16
hug-gunicorn: [2018-12-28 01:34:45 +0000] [13] [ERROR] Exception in worker process
hug-gunicorn: Traceback (most recent call last):
hug-gunicorn:   File "/usr/local/lib/python3.7/site-packages/gunicorn/arbiter.py", line 583, in spawn_worker
hug-gunicorn:     worker.init_process()
hug-gunicorn:   File "/usr/local/lib/python3.7/site-packages/gunicorn/workers/base.py", line 129, in init_process
hug-gunicorn:     self.load_wsgi()
hug-gunicorn:   File "/usr/local/lib/python3.7/site-packages/gunicorn/workers/base.py", line 138, in load_wsgi
hug-gunicorn:     self.wsgi = self.app.wsgi()
hug-gunicorn:   File "/usr/local/lib/python3.7/site-packages/gunicorn/app/base.py", line 67, in wsgi
hug-gunicorn:     self.callable = self.load()
hug-gunicorn:   File "/usr/local/lib/python3.7/site-packages/gunicorn/app/wsgiapp.py", line 52, in load
hug-gunicorn:     return self.load_wsgiapp()
hug-gunicorn:   File "/usr/local/lib/python3.7/site-packages/gunicorn/app/wsgiapp.py", line 41, in load_wsgiapp
hug-gunicorn:     return util.import_app(self.app_uri)
hug-gunicorn:   File "/usr/local/lib/python3.7/site-packages/gunicorn/util.py", line 350, in import_app
hug-gunicorn:     __import__(module)
hug-gunicorn:   File "/hug/app.py", line 1, in <module>
hug-gunicorn:     import hug
hug-gunicorn:   File "/usr/local/lib/python3.7/site-packages/hug/__init__.py", line 35, in <module>
hug-gunicorn:     from hug import (authentication, directives, exceptions, format, input_format, introspect,
hug-gunicorn:   File "/usr/local/lib/python3.7/site-packages/hug/route.py", line 27, in <module>
hug-gunicorn:     import hug.api
hug-gunicorn:   File "/usr/local/lib/python3.7/site-packages/hug/api.py", line 37, in <module>
hug-gunicorn:     from hug._async import asyncio, ensure_future
hug-gunicorn:   File "/usr/local/lib/python3.7/site-packages/hug/_async.py", line 30
hug-gunicorn:     ensure_future = asyncio.async  # pragma: no cover
hug-gunicorn:                                 ^

Here's my Dockerfile

FROM python:3.7.2-stretch

WORKDIR /hug
COPY app.py app.py
COPY gunicorn_conf.py gunicorn_conf.py
COPY requirements.txt requirements.txt

RUN pip3 install -r requirements.txt

CMD ["gunicorn", "app:__hug_wsgi__", "-c", "gunicorn_conf.py"]

And here's my gunicorn_conf.py

import multiprocessing
import os
import sys

workers = multiprocessing.cpu_count() * 2 + 1

bind = "0.0.0.0:8080"
keepalive = 120

worker_class = "meinheld.gmeinheld.MeinheldWorker"

def post_fork(server, worker):
    # Disalbe access log
    import meinheld.server
    meinheld.server.set_access_logger(None)

hugapi / hug

Trouble using gunicorn with Hug #710