src/share/classes/com/sun/corba/se/impl/javax/rmi/CORBA/StubDelegateImpl.java

@@ -145,10 +145,18 @@
             return ior == other.ior ;
         else
             return ior.equals( other.ior ) ;
     }
 
+    public int hashCode() {
+        if (ior == null) {
+            return 0;
+        } else {
+            return ior.hashCode();
+        }
+    }
+
     /**
      * Returns a string representation of this stub. Returns the same string
      * for all stubs that represent the same remote object.
      * @return a string representation of this stub.
      */