// Query for cluster witness service via DNS
        try {
            String clusterName = getClusterName(serverAddress);
            if (clusterName != null) {
                return InetAddress.getByName(clusterName + "-witness");
            }
        } catch (Exception e) {
            log.debug("Failed to discover cluster witness via DNS", e);
        }

        return null; // No witness service found

     * @throws FessSystemException if hostname resolution fails
     */
    protected InetAddress getInetAddressByName(final String host) {
        try {
            return InetAddress.getByName(host);
        } catch (final UnknownHostException e) {
            throw new FessSystemException("Failed to resolve the hostname: " + host, e);
        }
    }

    /**