Return value gets lost

Question

Hi,
I have one or more UnicastRemoteObject X with a method returning a byte-array. For every X there is a Thread Y with communicates with X over the X_RemoteInterface. In about 49 of 50 cases the method works fine, but sometimes it just doesn't return and the Thread freezes. What could my problem be? I'm very confused.
Sample code
public class X extends UnicastRemoteObject implements X_RemoteInterface {
public byte [] getBytes() {
byte [] b = .... <-- executes correctly
return b; <-- doesn't always reach the Object that called 'getBytes()'
public class Y extends Thread {
X_RemoteInterface xInterface;
public void run() {
xInterface.getBytes(); <-- sometimes Method doesn't return and Thread freezes

Answer 1

thanks wbracken for reading and understanding this :-)
the getBytes() method is not finishing up. It executes everything until the RETURN command (I checked this with lots of System.out.printlns), but the return value doesn't seem to reach the calling Thread ==> it just doesn't recieve any return parameter, so it continues waiting forever.
actually the whole method is synchronized. What kind of deadlock shoud I be looking for? the thing is, the method executes fine until the return statement and there is only one Thread for one X-Class with the getBytes() method.
So far I have used similar methods in other projects, but this time the amount of UnicastRemoteObjects is much higher. Could that cause the RMI not to work 100& correct anymore?