* first one will be used to retrieve user principal.
     * 
     * @param subject
     *            represents the user who perform Kerberos authentication.
     *            It contains tickets retrieve from KDC.
     */
    public Kerb5Authenticator ( Subject subject ) {
        this.subject = subject;
    }


    /**

            thread.setDaemon( true );
            thread.start();
        }
    }
    void tryClose() {
        synchronized( LOCK ) {

            /* Yes, there is the potential to drop packets
             * because we might close the socket during a
             * request. However the chances are slim and the
             * retry code should ensure the overall request

            this.thread.start();
        }
    }


    void tryClose () {
        synchronized ( this.LOCK ) {

            /*
             * Yes, there is the potential to drop packets
             * because we might close the socket during a
             * request. However the chances are slim and the
             * retry code should ensure the overall request