*/
    @Override
    protected int writeBytesWireFormat(final byte[] dst, int dstIndex) {
        final int start = dstIndex;

        if (log.isDebugEnabled()) {
            log.debug("Opening " + this.name);
            log.debug("Flags are " + Hexdump.toHexString(getFlags(), 4));
        }

        SMBUtil.writeInt2(57, dst, dstIndex);

                throw e;
            } catch (final Exception e) {
                if (retryCount > maxRetryCount) {
                    throw e;
                }
                if (logger.isDebugEnabled()) {
                    logger.debug("Failed to invoke actionGet. count:{}", retryCount, e);
                }

        }

        try {
            if (initialToken != null && initialToken.length > 0) {
                NegTokenInit tok = new NegTokenInit(initialToken);
                if (log.isDebugEnabled()) {
                    log.debug("Have initial token " + tok);
                }
                if (tok.getMechanisms() != null) {

        }
        ftpAuthenticationHolder = holder;
    }

    @Override
    public void close() {
        if (ftpAuthenticationHolder == null) {
            return;
        }
        if (logger.isDebugEnabled()) {
            logger.debug("Closing FtpClient...");
        }
        ftpAuthenticationHolder = null;
        for (final FTPClient ftpClient : ftpClientQueue) {
            try {