if (logger.isDebugEnabled()) {
            logger.debug("Start element: name={}", qName);
        }
        if (tagQueue.isEmpty() && !"eef".equalsIgnoreCase(qName)) {
            throw new GsaConfigException("Invalid GSA configuration format. Root element must be 'eef', but found: " + qName);
        }
        if (COLLECTION.equalsIgnoreCase(qName) && COLLECTIONS.equalsIgnoreCase(tagQueue.peekLast())) {