if (failures.isEmpty()) {
      throw UnknownHostException(hostname)
    }

    val failure = failures[0]

    if (failure is UnknownHostException) {
      throw failure
    }

    val unknownHostException = UnknownHostException(hostname)
    unknownHostException.initCause(failure)

    for (i in 1 until failures.size) {
      unknownHostException.addSuppressed(failures[i])
    }