logger.warn("No target urls. Skipped");
                break;
            }

            // interval time
            final int intervalTime =
                    webConfig.getIntervalTime() != null ? webConfig.getIntervalTime() : Constants.DEFAULT_INTERVAL_TIME_FOR_WEB;
            ((FessIntervalController) crawler.getIntervalController()).setDelayMillisForWaitingNewUrl(intervalTime);