long counter = 0;
            final Deque<CrawlRequest> requestQueue = new LinkedList<>();
            final Set<String> processedUrls = new HashSet<>();
            requestQueue.offer(new CrawlRequest(url, 0));
            while (!requestQueue.isEmpty() && (maxAccessCount < 0 || counter < maxAccessCount)) {
                final CrawlRequest crawlRequest = requestQueue.poll();

        activeConnections.incrementAndGet();

        if (nonPooled) {
            this.nonPooledConnections.offer(conn);
        } else {
            this.connections.offer(conn);
        }
        return conn;
    }

    /**
     * @param tc
     * @param address
     * @param port
     * @param localAddr
     * @param localPort

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