public boolean cancel(boolean mayInterruptIfRunning) {
    logger.get().log(FINER, "cancelling {0}", this);
    boolean cancelled = future.cancel(mayInterruptIfRunning);
    if (cancelled) {
      close();
    }
    return cancelled;
  }

  private void close() {
    logger.get().log(FINER, "closing {0}", this);
    closeables.close();
  }

    latch.countDown()
    callback.await(server.url("/a")).assertFailure("Canceled", "Socket closed", "Socket is closed")
  }

  @Test
  fun cancelAll() {
    val call = client.newCall(Request(server.url("/")))
    call.enqueue(callback)
    client.dispatcher.cancelAll()
    callback.await(server.url("/")).assertFailure("Canceled", "Socket closed", "Socket is closed")
  }

  @Test

	ctx = lkctx.Context()
	defer nsLock.Unlock(lkctx)

	// Freeze all incoming S3 API calls before running speedtest.
	globalNotificationSys.ServiceFreeze(ctx, true)

	// Unfreeze as soon as request context is canceled or when the function returns.
	go func() {
		<-ctx.Done()
		globalNotificationSys.ServiceFreeze(ctx, false)
	}()

	durationStr := r.Form.Get(peerRESTDuration)

	return MetricDescription{
		Namespace: s3MetricNamespace,
		Subsystem: requestsSubsystem,
		Name:      canceledTotal,
		Help:      "Total number of S3 requests that were canceled by the client",
		Type:      counterMetric,
	}
}

func getS3RejectedAuthRequestsTotalMD() MetricDescription {
	return MetricDescription{
		Namespace: s3MetricNamespace,

    val call = client.newCall(newRequest("/"))
    callReference.set(call)
    assertFailsWith<IOException> {
      call.execute()
    }.also { expected ->
      assertThat(expected.message).isEqualTo("Canceled")
    }
  }

  @Test
  fun disconnectBeforeConnect() {
    server.enqueue(
      MockResponse(body = "A"),
    )
    val call = client.newCall(newRequest("/"))
    call.cancel()

}

// getReplicationDiff returns un-replicated objects in a channel.
// If a non-nil channel is returned it must be consumed fully or
// the provided context must be canceled.
func getReplicationDiff(ctx context.Context, objAPI ObjectLayer, bucket string, opts madmin.ReplDiffOpts) (chan madmin.DiffInfo, error) {
	cfg, err := getReplicationConfig(ctx, bucket)
	if err != nil {

		Cause: errors.New("site replication resync is already in progress"),
		Code:  ErrSiteReplicationInvalidRequest,
	}
	errSRResyncCanceled = SRError{
		Cause: errors.New("site replication resync is already canceled"),
		Code:  ErrSiteReplicationInvalidRequest,
	}
	errSRNoResync = SRError{
		Cause: errors.New("no resync in progress"),
		Code:  ErrSiteReplicationInvalidRequest,
	}
	errSRResyncToSelf = SRError{