We have a nodeJS express app using feathers und we use websockets hosted on Windows Server with iisnode.
If we set nodeProcessCountPerApplication to 1 everything works fine. If we set it to 2 or zero we can not connect to the websockets any more.
Our code in app.js is basically this:
const socketio = require('@feathersjs/socketio');
const app = express(feathers());
app.configure(socketio());