.execute().actionGet().getHits().getTotalHits().value > 0);

        urlQueueService.delete("sessionId");
        assertFalse(fesenClient.prepareSearch("fess_crawler.queue").setQuery(QueryBuilders.termQuery("sessionId", "sessionId")).setSize(0)
                .execute().actionGet().getHits().getTotalHits().value > 0);

    }

                                .actionGet(fessConfig.getIndexIndicesTimeout());
                        final GetIndexResponse response =
                                client.admin().indices().prepareGetIndex().addIndices(fessConfig.getIndexDocumentUpdateIndex()).execute()
                                        .actionGet(fessConfig.getIndexIndicesTimeout());

    }

    public <T> T get(final Function<FesenClient, ActionFuture<T>> func) {
        int retryCount = 0;
        while (true) {
            try {
                return func.apply(this).actionGet(connTimeout, TimeUnit.MILLISECONDS);
            } catch (final IndexNotFoundException | VersionConflictEngineException e) {
                logger.debug("{} occurs.", e.getClass().getName(), e);
                throw e;