Multi-worker socket error odoo 16

[ygol]

I have configured odoo in prod with workers > 0 but lost the longpolling in the process. I get no error in the traefik dashboard. How may I further investigate/fix this issue?
Thank you

odoo_1    | 2023-05-30 10:47:38,013 32 INFO prod werkzeug: 176.230.58.123 - - [30/May/2023 10:47:38] "GET /websocket HTTP/1.1" 500 - 1 0.001 0.010
odoo_1    | 2023-05-30 10:47:39,044 28 ERROR prod odoo.http: Exception during request handling.
odoo_1    | Traceback (most recent call last):
odoo_1    |   File "/opt/odoo/custom/src/odoo/odoo/http.py", line 1988, in __call__
odoo_1    |     response = request._serve_db()
odoo_1    |   File "/opt/odoo/custom/src/odoo/odoo/http.py", line 1583, in _serve_db
odoo_1    |     return service_model.retrying(self._serve_ir_http, self.env)
odoo_1    |   File "/opt/odoo/custom/src/odoo/odoo/service/model.py", line 134, in retrying
odoo_1    |     result = func()
odoo_1    |   File "/opt/odoo/custom/src/odoo/odoo/http.py", line 1610, in _serve_ir_http
odoo_1    |     response = self.dispatcher.dispatch(rule.endpoint, args)
odoo_1    |   File "/opt/odoo/custom/src/odoo/odoo/http.py", line 1724, in dispatch
odoo_1    |     return self.request.registry['ir.http']._dispatch(endpoint)
odoo_1    |   File "/opt/odoo/auto/addons/website/models/ir_http.py", line 235, in _dispatch
odoo_1    |     response = super()._dispatch(endpoint)
odoo_1    |   File "/opt/odoo/custom/src/odoo/odoo/addons/base/models/ir_http.py", line 154, in _dispatch
odoo_1    |     result = endpoint(**request.params)
odoo_1    |   File "/opt/odoo/custom/src/odoo/odoo/http.py", line 696, in route_wrapper
odoo_1    |     result = endpoint(self, *args, **params_ok)
odoo_1    |   File "/opt/odoo/auto/addons/bus/controllers/websocket.py", line 23, in websocket
odoo_1    |     return WebsocketConnectionHandler.open_connection(request)
odoo_1    |   File "/opt/odoo/auto/addons/bus/websocket.py", line 814, in open_connection
odoo_1    |     Websocket(request.httprequest.environ['socket'], request.session),
odoo_1    | KeyError: 'socket'

[ap-wtioit]

Have you checked the discussion in #530 (Odoo 16.0 uses websockets which your proxy needs to be configured to use)

[ygol]

wow. that's a bad surprise :(
thanks @ap-wtioit for the pointer.