I have two JBoss Server on two PC connected with LAN. Two server have different EJBs (of course, different functions).

How can I call EJBs from one server to another server?

client -> JBoss Server A -> JBoss Server B
(do sth then call (do sth then return
EJBs in Server B. to Server A)
Return the result
of Server A & B)

For examples, UserHome is the Home of EJB in Server B. The following code is in the Server A call Server B EJB.

try {
InitialContext ctx = new InitialContext();
Object objref = ctx.lookup("ejb/fyp/main/UserBean");
UserHome home = (UserHome)PortableRemoteObject.narrow(objref, UserHome.class);
} catch (Exception NamingException) {
NamingException.printStackTrace();
}

As there hasn't UserHome class in server A, how can it connection to server B?

Is copy all the EJB class from Server A to Server B the only solution?