keyObj.setUrl(currentUrl);
                        }
                        crawlerStatsHelper.record(keyObj, StatsAction.PREPARED);
                        currentUrl = processRequest(paramMap, localDataMap, currentUrl, client);
                        if (currentUrl == null) {
                            break;
                        }

     * @throws ChildUrlsException if the URL redirects to another location
     * @throws CrawlerSystemException if data deserialization fails
     */
    public Map<String, Object> processRequest(final CrawlingConfig crawlingConfig, final String crawlingInfoId, final String url) {
        if (StringUtil.isBlank(crawlingInfoId)) {
            throw new CrawlingAccessException("sessionId is null.");
        }