python3 + Fedora + SSL + wsgi mistral deployment, mistral api returns: maximum recursion depth exceeded while calling a Python object

Description:-

So while testing python3 with Fedora in [1], Found an issue while running mistral behind wsgi. It fails with below Traceback:-

[Tue Dec 18 09:29:44.021589 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] mod_wsgi (pid=12268): Exception occurred processing WSGI script '/var/www/cgi-bin/mistral/app'.
[Tue Dec 18 09:29:44.025935 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] Traceback (most recent call last):
[Tue Dec 18 09:29:44.026189 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/webob/dec.py", line 129, in __call__
[Tue Dec 18 09:29:44.026196 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] resp = self.call_func(req, *args, **kw)
[Tue Dec 18 09:29:44.026202 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/webob/dec.py", line 193, in call_func
[Tue Dec 18 09:29:44.026205 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] return self.func(req, *args, **kwargs)
[Tue Dec 18 09:29:44.026211 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/oslo_middleware/base.py", line 131, in __call__
[Tue Dec 18 09:29:44.026214 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] response = req.get_response(self.application)
[Tue Dec 18 09:29:44.026219 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/webob/request.py", line 1313, in send
[Tue Dec 18 09:29:44.026222 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] application, catch_exc_info=False)
[Tue Dec 18 09:29:44.026227 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/webob/request.py", line 1277, in call_application
[Tue Dec 18 09:29:44.026230 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] app_iter = application(self.environ, start_response)
[Tue Dec 18 09:29:44.026234 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/webob/dec.py", line 129, in __call__
[Tue Dec 18 09:29:44.026237 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] resp = self.call_func(req, *args, **kw)
[Tue Dec 18 09:29:44.026242 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/webob/dec.py", line 193, in call_func
[Tue Dec 18 09:29:44.026245 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] return self.func(req, *args, **kwargs)
[Tue Dec 18 09:29:44.026250 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/keystonemiddleware/auth_token/__init__.py", line 332, in __call__
[Tue Dec 18 09:29:44.026253 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] response = self.process_request(req)
[Tue Dec 18 09:29:44.026258 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/keystonemiddleware/auth_token/__init__.py", line 622, in process_request
[Tue Dec 18 09:29:44.026260 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] resp = super(AuthProtocol, self).process_request(request)
[Tue Dec 18 09:29:44.026265 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/keystonemiddleware/auth_token/__init__.py", line 405, in process_request
[Tue Dec 18 09:29:44.026268 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] allow_expired=allow_expired)
[Tue Dec 18 09:29:44.026282 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/keystonemiddleware/auth_token/__init__.py", line 437, in _do_fetch_token
[Tue Dec 18 09:29:44.026285 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] data = self.fetch_token(token, **kwargs)
[Tue Dec 18 09:29:44.026290 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/keystonemiddleware/auth_token/__init__.py", line 761, in fetch_token
[Tue Dec 18 09:29:44.026293 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] allow_expired=allow_expired)
[Tue Dec 18 09:29:44.026298 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/keystonemiddleware/auth_token/_identity.py", line 219, in verify_token
[Tue Dec 18 09:29:44.026300 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] auth_ref = self._request_strategy.verify_token(
[Tue Dec 18 09:29:44.026305 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/keystonemiddleware/auth_token/_identity.py", line 170, in _request_strategy
[Tue Dec 18 09:29:44.026308 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] strategy_class = self._get_strategy_class()
[Tue Dec 18 09:29:44.026313 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/keystonemiddleware/auth_token/_identity.py", line 192, in _get_strategy_class
[Tue Dec 18 09:29:44.026316 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] if self._adapter.get_endpoint(version=klass.AUTH_VERSION):
[Tue Dec 18 09:29:44.026320 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/keystoneauth1/adapter.py", line 247, in get_endpoint
[Tue Dec 18 09:29:44.026323 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] return self.session.get_endpoint(auth or self.auth, **kwargs)
[Tue Dec 18 09:29:44.026328 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/keystoneauth1/session.py", line 1113, in get_endpoint
[Tue Dec 18 09:29:44.026331 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] return auth.get_endpoint(self, **kwargs)
[Tue Dec 18 09:29:44.026335 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/keystoneauth1/identity/base.py", line 380, in get_endpoint
[Tue Dec 18 09:29:44.026338 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] allow_version_hack=allow_version_hack, **kwargs)
[Tue Dec 18 09:29:44.026343 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/keystoneauth1/identity/base.py", line 271, in get_endpoint_data
[Tue Dec 18 09:29:44.026346 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] service_catalog = self.get_access(session).service_catalog
[Tue Dec 18 09:29:44.026351 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/keystoneauth1/identity/base.py", line 134, in get_access
[Tue Dec 18 09:29:44.026354 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] self.auth_ref = self.get_auth_ref(session)
[Tue Dec 18 09:29:44.026358 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/keystoneauth1/identity/generic/base.py", line 206, in get_auth_ref
[Tue Dec 18 09:29:44.026361 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] self._plugin = self._do_create_plugin(session)
[Tue Dec 18 09:29:44.026366 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/keystoneauth1/identity/generic/base.py", line 138, in _do_create_plugin
[Tue Dec 18 09:29:44.026369 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] authenticated=False)
[Tue Dec 18 09:29:44.026373 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/keystoneauth1/identity/base.py", line 610, in get_discovery
[Tue Dec 18 09:29:44.026379 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] authenticated=authenticated)
[Tue Dec 18 09:29:44.026384 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/keystoneauth1/discover.py", line 1442, in get_discovery
[Tue Dec 18 09:29:44.026387 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] disc = Discover(session, url, authenticated=authenticated)
[Tue Dec 18 09:29:44.026392 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/keystoneauth1/discover.py", line 526, in __init__
[Tue Dec 18 09:29:44.026395 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] authenticated=authenticated)
[Tue Dec 18 09:29:44.026399 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/keystoneauth1/discover.py", line 101, in get_version_data
[Tue Dec 18 09:29:44.026402 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] resp = session.get(url, headers=headers, authenticated=authenticated)
[Tue Dec 18 09:29:44.026407 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/keystoneauth1/session.py", line 1011, in get
[Tue Dec 18 09:29:44.026410 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] return self.request(url, 'GET', **kwargs)
[Tue Dec 18 09:29:44.026415 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/keystoneauth1/session.py", line 814, in request
[Tue Dec 18 09:29:44.026417 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] resp = send(**kwargs)
[Tue Dec 18 09:29:44.026422 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/keystoneauth1/session.py", line 903, in _send_request
[Tue Dec 18 09:29:44.026425 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] resp = self.session.request(method, url, **kwargs)
[Tue Dec 18 09:29:44.026430 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/requests/sessions.py", line 524, in request
[Tue Dec 18 09:29:44.026432 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] resp = self.send(prep, **send_kwargs)
[Tue Dec 18 09:29:44.026437 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/requests/sessions.py", line 637, in send
[Tue Dec 18 09:29:44.026440 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] r = adapter.send(request, **kwargs)
[Tue Dec 18 09:29:44.026445 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/requests/adapters.py", line 449, in send
[Tue Dec 18 09:29:44.026447 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] timeout=timeout
[Tue Dec 18 09:29:44.026452 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/urllib3/connectionpool.py", line 600, in urlopen
[Tue Dec 18 09:29:44.026455 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] chunked=chunked)
[Tue Dec 18 09:29:44.026460 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/urllib3/connectionpool.py", line 343, in _make_request
[Tue Dec 18 09:29:44.026463 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] self._validate_conn(conn)
[Tue Dec 18 09:29:44.026467 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/urllib3/connectionpool.py", line 839, in _validate_conn
[Tue Dec 18 09:29:44.026470 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] conn.connect()
[Tue Dec 18 09:29:44.026475 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/urllib3/connection.py", line 332, in connect
[Tue Dec 18 09:29:44.026478 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] cert_reqs=resolve_cert_reqs(self.cert_reqs),
[Tue Dec 18 09:29:44.026482 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib/python3.6/site-packages/urllib3/util/ssl_.py", line 281, in create_urllib3_context
[Tue Dec 18 09:29:44.026488 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] context.options |= options
[Tue Dec 18 09:29:44.026493 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib64/python3.6/ssl.py", line 423, in options
[Tue Dec 18 09:29:44.026495 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] super(SSLContext, SSLContext).options.__set__(self, value)
[Tue Dec 18 09:29:44.026500 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib64/python3.6/ssl.py", line 423, in options
[Tue Dec 18 09:29:44.026503 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] super(SSLContext, SSLContext).options.__set__(self, value)
[Tue Dec 18 09:29:44.026508 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] File "/usr/lib64/python3.6/ssl.py", line 423, in options
[Tue Dec 18 09:29:44.026510 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] super(SSLContext, SSLContext).options.__set__(self, value)
[Tue Dec 18 09:29:44.026515 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] [Previous line repeated 305 more times]
[Tue Dec 18 09:29:44.026533 2018] [wsgi:error] [pid 12268] [remote 127.0.0.1:39652] RecursionError: maximum recursion depth exceeded while calling a Python object

Environment Details:-
OS: Fedora 28
python: 3.6.7
eventlet: 0.24.1

The issue is around using of eventlet.monkey_patch even if running under wsgi[2]. Eventlet Best practices suggest to not run(skip) monkey_patch when running behind wsgi[3] but with mistral it's not the case, In mistral even behind wsgi monkey patch is running, which is causing this issue.

Expected result
===============
Mistral api should response successfully.

Actual result
=============
Mistral api returns Recursion Error.

[1] https://review.openstack.org/#/c/620561/
[2] https://github.com/openstack/mistral/blob/211e3964111816ef52588f914d4b7821e05ab625/mistral/cmd/launch.py#L22-L27 called via https://github.com/openstack/mistral/blob/211e3964111816ef52588f914d4b7821e05ab625/mistral/api/controllers/v2/service.py#L24-L26
[3] https://review.openstack.org/#/c/154642/2/specs/eventlet-best-practices.rst@54