final long maxCount = webConfig.getMaxAccessCount() != null ? webConfig.getMaxAccessCount() : maxAccessCount;
            crawlerContext.setMaxAccessCount(maxCount);

            webConfig.initializeClientFactory(() -> crawler.getClientFactory());
            final Map<String, String> configParamMap = webConfig.getConfigParameterMap(ConfigName.CONFIG);

            if (logger.isInfoEnabled()) {
                logger.info("Generating Thumbnail: {}", url);
            }

            final CrawlerClientFactory crawlerClientFactory =
                    config.initializeClientFactory(() -> ComponentUtil.getComponent(CrawlerClientFactory.class));
            final CrawlerClient client = crawlerClientFactory.getClient(url);
            if (client == null) {

        if (StringUtil.isBlank(crawlingInfoId)) {
            throw new CrawlingAccessException("sessionId is null.");
        }

        final CrawlerClientFactory crawlerClientFactory = crawlingConfig.initializeClientFactory(ComponentUtil::getCrawlerClientFactory);
        final CrawlerClient client = crawlerClientFactory.getClient(url);
        if (client == null) {

            handlerScriptMap = ParameterUtil.parse(getHandlerScript());
        }
        return handlerScriptMap;
    }

    @Override
    public CrawlerClientFactory initializeClientFactory(final Supplier<CrawlerClientFactory> creator) {
        if (crawlerClientFactory != null) {
            return crawlerClientFactory;
        }
        final CrawlerClientFactory factory = creator.get();

        }
        final String url = DocumentUtil.getValue(doc, fessConfig.getIndexFieldUrl(), String.class);
        final CrawlerClientFactory crawlerClientFactory =
                config.initializeClientFactory(() -> ComponentUtil.getComponent(CrawlerClientFactory.class));
        final CrawlerClient client = crawlerClientFactory.getClient(url);
        if (client == null) {