private final List<HttpURLConnection> connections = new ArrayList<>();
        private int currentIndex = 0;

        void addConnection(HttpURLConnection conn) {
            connections.add(conn);
        }

        @Override
        protected URLConnection openConnection(URL u) throws IOException {
            if (currentIndex < connections.size()) {
                return connections.get(currentIndex++);

      allocationLimit = settings.getMaxConcurrentStreams()

      if (allocationLimit < oldLimit) {
        // We might need new connections to keep policies satisfied
        connectionPool.scheduleOpener(route.address)
      } else if (allocationLimit > oldLimit) {
        // We might no longer need some connections
        connectionPool.scheduleCloser()
      }
    }
  }

  override fun handshake(): Handshake? = handshake

 *  Upgrade: [Kotlin 1.3.71][kotlin_1_3_71].


## Version 4.5.0

_2020-04-06_

**This release fixes a severe bug where OkHttp incorrectly detected and recovered from unhealthy
connections.** Stale or canceled connections were incorrectly attempted when they shouldn't have
been, leading to rare cases of infinite retries. Please upgrade to this release!

    /** Array of Windows error messages corresponding to WINERR_CODES */
    String[] WINERR_MESSAGES = { "The operation completed successfully.", "Access is denied.",
            "No more connections can be made to this remote computer at this time because there are already as many connections as the computer can accept.",
            "The pipe state is invalid.", "All pipe instances are busy.", "The pipe is being closed.",

    /** Array of Windows error messages corresponding to WINERR_CODES */
    String[] WINERR_MESSAGES = { "The operation completed successfully.", "Access is denied.",
            "No more connections can be made to this remote computer at this time because there are already as many connections as the computer can accept.",
            "The pipe state is invalid.", "All pipe instances are busy.", "The pipe is being closed.",

 *     lookups) and attempt new connections to them. When failures occur, retries iterate the
 *     list of available routes.
 *
 * If the pool gains an eligible connection while DNS, TCP, or TLS work is in flight, this finder
 * will prefer pooled connections. Only pooled HTTP/2 connections are used for such de-duplication.
 *

import okhttp3.internal.toImmutableList

/**
 * A specification for a connection to an origin server. For simple connections, this is the
 * server's hostname and port. If an explicit proxy is requested (or [no proxy][Proxy.NO_PROXY] is
 * explicitly requested), this also includes that proxy information. For secure connections the
 * address also includes the SSL socket factory, hostname verifier, and certificate pinner.
 *

 *   <li>DEFAULT_MAX_CONNECTION_PER_ROUTE_PROPERTY: Default maximum connections per route.</li>
 *   <li>MAX_TOTAL_CONNECTION_PROPERTY: Maximum total connections.</li>
 *   <li>TIME_TO_LIVE_TIME_UNIT_PROPERTY: Time to live unit for connections.</li>
 *   <li>TIME_TO_LIVE_PROPERTY: Time to live for connections.</li>
 * </ul>
 *
 */
public class HcHttpClient extends AbstractCrawlerClient {

    /**

     *
     * Property {@code jcifs.smb.client.lport} (int)
     *
     * @return local port to use for outgoing connections
     */
    int getLocalPort();

    /**
     *
     * Property {@code jcifs.smb.client.laddr} (string)
     *
     * @return local address to use for outgoing connections
     */
    InetAddress getLocalAddr();

    /**
     *

    protected int smbConnectionTimeout = SmbConstants.DEFAULT_CONN_TIMEOUT;
    /** Session timeout in milliseconds for SMB sessions */
    protected int smbSessionTimeout = SmbConstants.DEFAULT_SO_TIMEOUT;
    /** Whether idle timeout is disabled for connections */
    protected boolean idleTimeoutDisabled = false;
    /** Local address to bind for SMB connections */