.param("q", queryString)
                .get(getEsUrl() + "/" + DOC_INDEX_NAME + "/_search");
        JsonPath jsonPath = JsonPath.from(response.asString());
        String scrollId = jsonPath.getString("_scroll_id");
        while (true) {
            List<String> resultIds = jsonPath.getList("hits.hits._id");
            if (resultIds.size() == 0) {
                break;
            }

            deleteScrollContext(scrollId);
        }
        return count;
    }

    /**
     * Deletes a scroll context to free resources.
     *
     * @param scrollId the scroll ID to delete
     */
    protected void deleteScrollContext(final String scrollId) {
        if (scrollId != null) {
            client.prepareClearScroll()
                    .addScrollId(scrollId)