} else {
            if (value instanceof final Collection<?> coll && !coll.isEmpty()) {
                // care performance for List that the most frequent pattern
                final Object first = coll instanceof List<?> ? ((List<?>) coll).get(0) : coll.iterator().next();
                if (first instanceof Entity) {
                    data.register(key, coll.stream().map(BeanUtil::copyBeanToNewMap).collect(Collectors.toList()));

        urlQueueService.insert(urlQueue);

        // Poll should return the item
        final OpenSearchUrlQueue polled = urlQueueService.poll(sessionId);
        assertNotNull(polled);
        assertEquals("http://www.example.com/page1", polled.getUrl());
        assertEquals(sessionId, polled.getSessionId());

        // Second poll should return null (queue is empty)

        // Clean up all pooled regions
        RdmaMemoryRegion region;

        while ((region = availableSendRegions.poll()) != null) {
            region.close();
            totalReleased.incrementAndGet();
        }

        while ((region = availableReceiveRegions.poll()) != null) {
            region.close();
            totalReleased.incrementAndGet();
        }

                return;
            }
            response = r;

            executeCallbacks = new ArrayList<>(doneCallbacks.size());
            Consumer<RESPONSE> callback;
            while ((callback = doneCallbacks.poll()) != null) {
                executeCallbacks.add(callback);
            }
        }
        if (executeCallbacks.size() > 0) {
            try {

     *
     * @see org.codelibs.fess.crawler.service.UrlQueueService#poll(java.lang.String)
     */
    @Override
    public UrlQueueImpl<Long> poll(final String sessionId) {
        final Queue<UrlQueueImpl<Long>> urlQueueList = dataHelper.getUrlQueueList(sessionId);
        synchronized (urlQueueList) {
            return urlQueueList.poll();
        }
    }

    /*
     * (non-Javadoc)
     *

     */
    @Override
    public OpenSearchUrlQueue poll(final String sessionId) {
        final QueueHolder queueHolder = getQueueHolder(sessionId);
        final Queue<OpenSearchUrlQueue> waitingQueue = queueHolder.waitingQueue;
        final Queue<OpenSearchUrlQueue> crawlingQueue = queueHolder.crawlingQueue;

        OpenSearchUrlQueue urlQueue = waitingQueue.poll();
        if (urlQueue == null) {

     */
    public void test_run_noUrlsInQueue() throws Exception {
        when(urlQueueService.poll(anyString())).thenReturn(null);
        crawlerContext.setStatus(CrawlerStatus.RUNNING);
        crawlerContext.maxThreadCheckCount = 1; // Will exit after 1 check

        crawlerThread.run();

        verify(urlQueueService, times(1)).poll(anyString());
    }

    /**
     * Test run method with crawler status DONE.
     */

            UrlQueue urlQueue;
            while ((urlQueue = urlQueueService.poll(sessionId1)) != null) {
                assertTrue(urlQueue.getUrl() + "=>" + url1, urlQueue.getUrl().startsWith(url1));
            }
            while ((urlQueue = urlQueueService.poll(sessionId2)) != null) {
                assertTrue(urlQueue.getUrl() + "=>" + url2, urlQueue.getUrl().startsWith(url2));
            }

     *
     * @return an encryption cipher
     */
    protected Cipher pollEncryptoCipher() {
        Cipher cipher = encryptoQueue.poll();
        if (cipher == null) {
            try {
                final SecretKeySpec sksSpec = new SecretKeySpec(key.getBytes(charsetName), algorithm);
                cipher = Cipher.getInstance(algorithm);

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