if ( this.loadBalance ) {
                    NtlmChallenge chal = (NtlmChallenge) ssn.getAttribute("NtlmHttpChal");
                    if ( chal == null ) {
                        chal = getChallengeForDomain(this.defaultDomain);
                        ssn.setAttribute("NtlmHttpChal", chal);
                    }
                    dc = chal.dc;
                    challenge = chal.challenge;
                }

                if( loadBalance ) {
                    NtlmChallenge chal = (NtlmChallenge)ssn.getAttribute( "NtlmHttpChal" );
                    if( chal == null ) {
                        chal = SmbSession.getChallengeForDomain();
                        ssn.setAttribute( "NtlmHttpChal", chal );
                    }
                    dc = chal.dc;
                    challenge = chal.challenge;
                } else {

            ssn.getSmbTree( LOGON_SHARE, null ).treeConnect( null, null );
        }
        return new NtlmChallenge( trans.server.encryptionKey, dc );
    }
    public static NtlmChallenge getChallengeForDomain()
                throws SmbException, UnknownHostException {
        if( DOMAIN == null ) {
            throw new SmbException( "A domain was not specified" );
        }
synchronized (DOMAIN) {