SearchResponse response = client.prepareSearch(index)
                .setScroll(scrollForDelete)
                .setSize(sizeForDelete)
                .setFetchSource(new String[] { fessConfig.getIndexFieldId() }, null)
                .setQuery(queryBuilder)
                .setPreference(Constants.SEARCH_PREFERENCE_LOCAL)
                .execute()
                .actionGet(fessConfig.getIndexScrollSearchTimeout());