The doRename method unconditionally invokes itself. This would seem to indicate an infinite recursive loop that will result in a stack overflow if setupMode is true.

$ pwd
/local-copy/1.6.0-rc-b69_src/j2se/src/share/classes/com/sun/jndi/ldap

$ tail +143 LdapSchemaCtx.java | head -8
    final protected void doRename(Name oldname, Name newname)
        throws NamingException {
        if (!setupMode) {
            throw new SchemaViolationException("Cannot rename a schema object");
        } else {
            doRename(oldname, newname);
        }
    }