hostname,
      object : AsyncDns.Callback {
        override fun onResponse(
          hostname: String,
          addresses: List<InetAddress>,
        ) {
          allAddresses.addAll(addresses)
          latch.countDown()
        }

        override fun onFailure(
          hostname: String,
          e: IOException,
        ) {
          exception = e
          latch.countDown()