}
            final String refresh = StringUtil.isNotBlank(fessConfig.getIndexReindexRefresh()) ? fessConfig.getIndexReindexRefresh() : null;
            try (CurlResponse response = ComponentUtil.getCurlHelper().post("/" + index + "/_update_by_query").param("refresh", refresh)
                    .param("max_docs", "1").body(source).execute()) {
                if (response.getHttpStatusCode() == 200) {
                    return true;