@Volatile private var canceled = false

  @Volatile private var exchange: Exchange? = null
  internal val plansToCancel = CopyOnWriteArrayList<RoutePlanner.Plan>()

  override fun timeout(): Timeout = timeout

  @SuppressWarnings("CloneDoesntCallSuperClone") // We are a final type & this saves clearing state.
  override fun clone(): Call = RealCall(client, originalRequest, forWebSocket)

    return if (http2Connection != null) {
      Http2ExchangeCodec(client, this, chain, http2Connection)
    } else {
      socket.soTimeout = chain.readTimeoutMillis()
      source.timeout().timeout(chain.readTimeoutMillis.toLong(), MILLISECONDS)
      sink.timeout().timeout(chain.writeTimeoutMillis.toLong(), MILLISECONDS)
      Http1ExchangeCodec(client, this, source, sink)
    }
  }

  @Throws(SocketException::class)

  override fun cancel(): Unit = error("unexpected")

  override fun isExecuted(): Boolean = error("unexpected")

  override fun isCanceled(): Boolean = error("unexpected")

  override fun timeout(): Timeout = error("unexpected")

  override fun clone(): Call = error("unexpected")

## Version 4.3.0

_2019-12-31_

 *  Fix: Degrade HTTP/2 connections after a timeout. When an HTTP/2 stream times out it may impact
    the stream only or the entire connection. With this fix OkHttp will now send HTTP/2 pings after
    a stream timeout to determine whether the connection should remain eligible for pooling.

          // No client for CONNECT tunnels:
          client = null,
          carrier = this,
          source = source,
          sink = sink,
        )
      source.timeout().timeout(readTimeoutMillis.toLong(), TimeUnit.MILLISECONDS)
      sink.timeout().timeout(writeTimeoutMillis.toLong(), TimeUnit.MILLISECONDS)
      tunnelCodec.writeRequest(nextRequest.headers, requestLine)
      tunnelCodec.finishRequest()
      val response =

          cacheBody.emitCompleteSegments()
          return bytesRead
        }

        override fun timeout(): Timeout = source.timeout()

        @Throws(IOException::class)
        override fun close() {
          if (!cacheRequestClosed &&
            !discard(ExchangeCodec.DISCARD_STREAM_TIMEOUT_MILLIS, MILLISECONDS)
          ) {
            cacheRequestClosed = true
            cacheRequest.abort()

     * all must complete within one timeout period.
     *
     * The default value is 0 which imposes no timeout.
     */
    fun callTimeout(
      timeout: Long,
      unit: TimeUnit,
    ) = apply {
      callTimeout = checkDuration("timeout", timeout, unit)
    }

    /**
     * Sets the default timeout for complete calls. A value of 0 means no timeout, otherwise values

      throw InterruptedIOException()
    }
  }

  /**
   * The Okio timeout watchdog will call [timedOut] if the timeout is reached. In that case we close
   * the stream (asynchronously) which will notify the waiting thread.
   */
  internal inner class StreamTimeout : AsyncTimeout() {
    override fun timedOut() {
      closeLater(ErrorCode.CANCEL)
      connection.sendDegradedPingLater()
    }

import org.junit.jupiter.api.Disabled
import org.junit.jupiter.api.Tag
import org.junit.jupiter.api.Timeout
import org.junit.jupiter.api.extension.RegisterExtension
import org.junit.jupiter.params.ParameterizedTest
import org.junit.jupiter.params.provider.ArgumentsSource

/** Test how HTTP/2 interacts with HTTP features.  */
@Timeout(60)
@Flaky
@Tag("Slow")
class HttpOverHttp2Test {

    private var editCount = 0

    override fun poll(): T = delegate.poll()

    override fun poll(
      timeout: Long,
      unit: TimeUnit,
    ): T? {
      taskRunner.lock.withLock {
        val waitUntil = nanoTime + unit.toNanos(timeout)
        while (true) {
          val result = poll()
          if (result != null) return result
          if (nanoTime >= waitUntil) return null