在AWS弹性豆茎上安装Tomcat 7的Websocket

I'm trying to run a simple websocket echo application on Elastic Beanstalk. But if I run it I'm getting an error 400 on the Socket Upgrade from Tomcat, but this just happens on port 80 if I pass port 8080 thought the loadbalancer I can access the websocket without the error 400 on socket upgrade (on port 8080). Port 8080 and Port 80 are both on TCP not HTTP. I'm trying to run a simple websocket echo appli