.prepareNodesHotThreads()
                    .setIgnoreIdleThreads(ignoreIdleThreads)
                    .setInterval(interval)
                    .setThreads(threads)
                    .setTimeout(timeout)
                    .setType(type)
                    .execute()
                    .actionGet(timeout);
            append(buf, "cluster_name", () -> response.getClusterName().value()).append(',');

            final long queryTimeout = fessConfig.getQueryTimeoutAsInteger().longValue();
            if (queryTimeout >= 0) {
                searchRequestBuilder.setTimeout(TimeValue.timeValueMillis(queryTimeout));
            }

            try {
                if (logger.isDebugEnabled()) {
                    logger.debug("Query DSL: {}", searchRequestBuilder);