clusterName = response.getClusterName();
        clusterStatus = response.getStatus().toString();
        final Set<String> fieldSet = ComponentUtil.getFessConfig().getApiPingEsFieldSet();
        try (OutputStream out = SearchEngineUtil.getXContentBuilderOutputStream((builder, params) -> {
            builder.startObject();
            if (fieldSet.contains(CLUSTER_NAME)) {

                .get(stream -> stream.filter(StringUtil::isNotBlank).map(String::trim).toArray(n -> new String[n]));
    }

    String getApiPingSearchEngineFields();

    default Set<String> getApiPingEsFieldSet() {
        Set<String> value = (Set<String>) propMap.get(API_PING_SEARCH_ENGINE_FIELD_SET);
        if (value == null) {
            value = split(getApiPingSearchEngineFields(), ",")