* If any of the above fail, isExists will not be set true
             */

            this.isExists = true;

        }
        catch ( UnknownHostException uhe ) {
            log.debug("Unknown host", uhe);
        }
        catch ( SmbException se ) {
            log.trace("exists:", se);
            switch ( se.getNtStatus() ) {
            case NtStatus.NT_STATUS_NO_SUCH_FILE:

                        // - the specification does not clearly require that (it does for SMB3+)
                        // - there seem to be server implementations (known: EMC Isilon) that do not sign the final
                        // response
                        if ( negoResp.getSelectedDialect().atLeast(DialectVersion.SMB300) || response.isSigned() ) {