for (int i = 0; i < 5; i++){
Util.sleep(100);
System.out.println("Invoke all members 'getUser' method");
NotifyingFuture<RspList> future = disp.callRemoteMethodWithFuture(channel.getAddress(), method_call, new RequestOptions(ResponseMode.GET_ALL, 5000));
future.setListener(new FutureListener(){
public void futureDone(Future future) {
try {
System.out.println("result is " + future.get());
} catch (InterruptedException e) {