How to get the Node's server IP behind a load balancer in Java

I have a webpage behind a load balancer, and I want to display the user (for 开发者_高级运维troubleshooting purposes) the IP of the actual node that the user is connected to (will be the same for a while due to sticky session)

I'm sure it's a very trivial question, but I want to be sure, what Java API should be used for that? will all APIs return me the request host? or will it be server dependent?

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InetAddress.getLocalHost().getHostName() will give you the name of the server you are on. InetAddress.getLocalHost().getHostAddress() will give the IP Address of the server you are on.