public String getRemoteHostAddress() {
        if (remoteAddress instanceof InetSocketAddress) {
            InetAddress remoteInetAddress =  ((InetSocketAddress) remoteAddress).getAddress();
            if (remoteInetAddress == null)
                return null;
            return remoteInetAddress.getHostAddress();
        }
        else {
            throw new RuntimeException("Unknown SocketAddress class: " + remoteAddress.getClass().getName());
        }
    }
Returns the remote address, or null if unresolved
container-core/src/main/java/com/yahoo/jdisc/http/HttpRequest.java