In URL-formatted arguments for the Naming class's methods,
if port number is omitted, remote objects are not registered.

 For example,
Naming.rebind("//myhost:1099/HelloServer", obj);
 works correctly. But,
Naming.rebind("//myhost/HelloServer", obj);
 or
Naming.rebind("HelloServer", obj);
 throws java.net.ConnectException.

The specification says that
If port is omitted, then the port defaults to 1099, the "well-known" port that RMI's registry, rmiregistry, uses.

This is a regression.
On JDK 1.2.2, it works correctly.