@Override
    public String acquireSortClusterConfigUrl() {
        if (sortClusterConfigUrl != null) {
            return sortClusterConfigUrl;
        }
        sortClusterConfigUrl = context.getString(KEY_SORT_CLUSTER_CONFIG_MANAGER_URL);
        if (StringUtils.isBlank(sortClusterConfigUrl)) {
            String warnMsg = "Get key" + KEY_SORT_CLUSTER_CONFIG_MANAGER_URL
                    + " from CommonPropertiesHolder failed, it's a optional property use to specify "
                    + "the url where Sort-Standalone request SortSourceConfig.";
            LOG.warn(warnMsg);
            sortClusterConfigUrl = warnMsg;
        }
        return sortClusterConfigUrl;
    }
Default ManagerUrlLoader. acquire URLs from common.properties.
inlong-sort-standalone/sort-standalone-common/src/main/java/org/apache/inlong/sort/standalone/config/loader/CommonPropertiesManagerUrlLoader.java