Spring Websocket in a tomcat cluster

Question

In our current application, we use Spring Websockets over STOMP. We are looking to scale horizontally. Are there any best practices on how we should handle websocket traffic

Answer 1

Maintain session info across multiple nodes:

Suppose we have 2 server host, backed up with load balancer.

Websockets are socket connection from browser to specific server host.eg host1

Now if host1 goes down, socket connection from load balancer - host 1 will break. How spring will reopen same websocket connection from load balancer to host 2 ? browser should not open new websocket connection