workingOnly = true,
        getOnly = true,
      )
    runBatch(dnsProviders, names)
    println("cached second run\n*****************\n")
    dnsProviders =
      providers(
        client = bootstrapClient,
        http2Only = true,
        workingOnly = true,
        getOnly = true,
      )
    runBatch(dnsProviders, names)
  } finally {
    bootstrapClient.connectionPool.evictAll()

  private final CountDownLatch runLatch = new CountDownLatch(1);
  private final CountDownLatch taskLatch = new CountDownLatch(1);
  private final CountDownLatch listenerLatch = new CountDownLatch(1);

  private volatile boolean throwException = false;

  private final ListenableFutureTask<Integer> task =
      ListenableFutureTask.create(
          () -> {
            runLatch.countDown();
            taskLatch.await();

  private final CountDownLatch runLatch = new CountDownLatch(1);
  private final CountDownLatch taskLatch = new CountDownLatch(1);
  private final CountDownLatch listenerLatch = new CountDownLatch(1);

  private volatile boolean throwException = false;

  private final ListenableFutureTask<Integer> task =
      ListenableFutureTask.create(
          () -> {
            runLatch.countDown();
            taskLatch.await();