FessSystemException cause = null;
        for (int i = 0; i < maxConfigSyncStatusRetry; i++) {
            try (CurlResponse response = ComponentUtil.getCurlHelper().get("/_configsync/wait").param("status", "green").execute()) {
                final int httpStatusCode = response.getHttpStatusCode();
                if (httpStatusCode == 200) {
                    logger.info("ConfigSync is ready.");
                    return;