final Map<String, LocalDateTime> duplicateSessionMap = new HashMap<>();
        searchLogList.stream().forEach(searchLog -> {
            if (searchLog.getHitCount() == null
                    || searchLog.getHitCount().longValue() < fessConfig.getSuggestMinHitCountAsInteger().longValue()) {
                return;
            }

            final String sessionId;

                    appendJson("user", entity.getUser(), buf).append(',');
                    appendJson("search-word", entity.getSearchWord(), buf).append(',');
                    appendJson("hit-count", entity.getHitCount(), buf).append(',');
                    appendJson("query-page-size", entity.getQueryPageSize(), buf).append(',');
                    appendJson("query-offset", entity.getQueryOffset(), buf).append(',');