src/share/classes/java/net/URLClassLoader.java

@@ -760,10 +760,14 @@
         sun.misc.SharedSecrets.setJavaNetAccess (
             new sun.misc.JavaNetAccess() {
                 public URLClassPath getURLClassPath (URLClassLoader u) {
                     return u.ucp;
                 }
+                public byte[] getHardwareAddress0(NetworkInterface ni)
+                    throws SocketException {
+                    return ni.getHardwareAddress0();
+                }
             }
         );
         ClassLoader.registerAsParallelCapable();
     }
 }