chain: RealInterceptorChain,
  ) {
    check(interceptorScopedExchange == null)

    this.withLock {
      check(!responseBodyOpen) {
        "cannot make a new request because the previous response is still open: " +
          "please call response.close()"
      }
      check(!requestBodyOpen)
    }

    if (newRoutePlanner) {
      val routePlanner =
        RealRoutePlanner(

    receiving stream to process it.

    This change may increase OkHttp's memory use for applications that make many concurrent HTTP
    calls and that can receive data faster than they can process it. Previously, OkHttp limited
    HTTP/2 to 16 MiB of unacknowledged data per connection. With this fix there is a limit of 16 MiB
    of unacknowledged data per stream and no per-connection limit.

 *  Upgrade: [Okio 3.1.0][okio_3_1_0].


## Version 5.0.0-alpha.6

_2022-03-14_

 *  Fix: Don't attempt to close pooled connections. We saw occasional fast fallback calls crash in
    the previous alpha due to an unexpected race.


## Version 5.0.0-alpha.5

_2022-02-21_

 *  Fix: Don't include [Assertk][assertk] in OkHttp's production dependencies. This regression was

   * from the remote peer. Existing streams are not impacted. This is intended to permit an endpoint
   * to gracefully stop accepting new requests without harming previously established streams.
   */
  @Throws(IOException::class)
  fun shutdown(statusCode: ErrorCode) {
    writer.withLock {
      val lastGoodStreamId: Int
      this.withLock {
        if (isShutdown) {

   * confirms the fast fallback implements these invariants:
   *
   *  * if there's no TCP connect in flight, start one.
   *  * don't start a new TCP connect within 250 ms of the previous TCP connect.
   */
  @Test
  fun minimumDelayEnforcedBetweenConnects() {
    val plan0 = routePlanner.addPlan()
    plan0.tcpConnectDelayNanos = 510.ms
    plan0.tcpConnectThrowable = IOException("boom!")