}
        final SearchResponse response = client.prepareSearch(index).setQuery(QueryBuilders.termQuery(fessConfig.getIndexFieldUrl(), url))
                .setFetchSource(false).setSize(fessConfig.getPageScoreBoosterMaxFetchSizeAsInteger()).execute().actionGet(requestTimeout);
        return Arrays.stream(response.getHits().getHits()).map(SearchHit::getId).toArray(n -> new String[n]);
    };

     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     * @throws NumberFormatException When the property is not integer.
     */
    Integer getPageScoreBoosterMaxFetchSizeAsInteger();

    /**
     * Get the value for the key 'page.searchlog.max.fetch.size'. <br>
     * The value is, e.g. 10000 <br>