}
    
    public void cleanup() {
        // Clean up all pooled regions
        RdmaMemoryRegion region;
        
        while ((region = availableSendRegions.poll()) != null) {
            region.close();
            totalReleased.incrementAndGet();
        }
        
        while ((region = availableReceiveRegions.poll()) != null) {
            region.close();

            log.info("Removed {} idle connections from pool", toRemoveCount);
        }
    }

    /**
     * Set the maximum pool size
     * @param size the maximum number of connections in the pool
     */
    public void setMaxPoolSize(int size) {
        if (size <= 0) {
            throw new IllegalArgumentException("Pool size must be positive");
        }
        this.maxPoolSize = size;

        assertTrue(pool.contains(transport), "Transport should be in pool initially");

        // When: Remove the transport
        pool.removeTransport(transport);

        // Then: Transport should no longer be in pool
        assertFalse(pool.contains(transport), "Transport should be removed from pool");
    }

    @Test

        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)

    /**
     * Creates a new fixed thread pool executor with the specified number of threads.
     *
     * @param nThreads the number of threads in the pool
     * @return a new ThreadPoolExecutor configured for this callback
     */
    protected ExecutorService newFixedThreadPool(final int nThreads) {
        if (logger.isDebugEnabled()) {
            logger.debug("Initialized executor thread pool: size={}", nThreads);
        }

        // Test multiple components together
        long start = System.nanoTime();

        // 1. Connection Pool Test
        SmbTransportPoolImpl pool = new SmbTransportPoolImpl();
        pool.setMaxPoolSize(50);
        for (int i = 0; i < 100; i++) {
            pool.contains(null); // Should be fast without global sync
        }

        // 2. Buffer Cache Test
        for (int i = 0; i < 100; i++) {

     */
    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.
     */

     */
    @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) {

            throw new CurlException("Invalid encoding: " + encoding, e);
        }
    }

    /**
     * Sets the thread pool for executing the request.
     *
     * @param threadPool the thread pool
     * @return this CurlRequest instance
     */
    public CurlRequest threadPool(final ForkJoinPool threadPool) {
        this.threadPool = threadPool;
        return this;

            verify(transportPool).removeTransport(transport2);
        }
    }

    @Nested
    @DisplayName("Pool Lifecycle")
    class PoolLifecycleTests {

        @Test
        @DisplayName("Should close pool successfully with no active transports")
        void testClosePoolNoActiveTransports() throws CIFSException {
            // Given