final FessConfig fessConfig = ComponentUtil.getFessConfig();

        // HttpClient Parameters
        final Map<String, Object> paramMap = new HashMap<>();
        factory.setInitParameterMap(paramMap);

        final Map<String, String> clientConfigMap = getConfigParameterMap(ConfigName.CLIENT);
        if (clientConfigMap != null) {
            paramMap.putAll(clientConfigMap);
        }

        final Map<String, String> paramMap = getHandlerParameterMap();

        final Map<String, Object> factoryParamMap = new HashMap<>();
        factory.setInitParameterMap(factoryParamMap);

        // parameters
        for (final Map.Entry<String, String> entry : paramMap.entrySet()) {
            final String key = entry.getKey();