check(!responseBodyOpen)
      check(!requestBodyOpen)
    }

    val exchangeFinder = this.exchangeFinder!!
    val connection = exchangeFinder.find()
    val codec = connection.newCodec(client, chain)
    val result = Exchange(this, eventListener, exchangeFinder, codec)
    this.interceptorScopedExchange = result
    this.exchange = result
    withLock {
      this.requestBodyOpen = true