[whatsApp] does websocket need load balancer?

In Whatsapp design, when using websocket, should we add load balancer between user and webserver socket server? as there are multiple web socket server , LB could help to select the specific websocket server?

Find the answer from full design diagram. It uses LB to do HTTP request first , and select the websocket server, and then create the websocket connection without LB.

Could close the question now.

对的,第一次发出 HTTP Request 是通过 LB 的,之后定下来哪台 Websocket Server 之后就不改了,直到断掉重连的时候。