synchronized ( trans ) {
                try {
                    // ensure connected
                    trans.ensureConnected();
                    refServerName = trans.getRemoteHostName();
                }
                catch ( IOException e ) {
                    log.warn("Failed to connect to domain controller", e);
                }

    protected void finalize () throws Throwable {
        if ( isConnected() && this.usageCount.get() != 0 ) {
            log.warn("Tree was not properly released");
        }
    }


    /**
     * 
     * @return whether the tree is connected
     */
    public boolean isConnected () {
        return this.tid != -1 && this.session.isConnected() && this.connectionState.get() == 2;
    }


    /**

/**
 *
 */
final class SmbSessionImpl implements SmbSessionInternal {

    private static final Logger log = LoggerFactory.getLogger(SmbSessionImpl.class);

    /*
     * 0 - not connected
     * 1 - connecting
     * 2 - connected
     * 3 - disconnecting
     */
    private final AtomicInteger connectionState = new AtomicInteger();
    private int uid;
    private List<SmbTreeImpl> trees;

    }
/**
 * It is not necessary to call this method directly. This is the
 * <tt>URLConnection</tt> implementation of <tt>connect()</tt>.
 */
    public void connect() throws IOException {
        if (isConnected() && tree.session.transport.tconHostName == null) {
            /* Tree thinks it is connected but transport disconnected
             * under it, reset tree to reflect the truth.
             */

            return false;
        }
    }


    /**
     * {@inheritDoc}
     *
     * @see java.net.URLConnection#connect()
     */
    @Override
    public void connect () throws IOException {
        try ( SmbTreeHandle th = ensureTreeConnected() ) {}
    }


    /**
     * 
     * @return a tree handle
     * @throws CIFSException