Enabling Cross Origin Requests for WebSockets in Spring

Question

I have a OpenShift Wildfly server. I am building a website with the Spring MVC framework. One of my webpages also uses a WebSocket connection. On the server side, I

Answer 1

I don't think it's a CORS issue because it's connected successully before being disconnected. If that's CORS, you can't even connect.

I think it's a communication problem between your DNS & openshift because WebSocket need a persistent connection (long-live) which keeps opening between client & server. If your DNS (e.g. CloudFlare or something like that) does not support / not configured to use WebSocket, the client would be disconnected immediately as in your issue.