if tgt.Empty() {
			writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErrWithErr(ErrInvalidRequest, fmt.Errorf("invalid arn : '%s'", opts.ARN)), r.URL)
			return
		}
	}

	keepAliveTicker := time.NewTicker(500 * time.Millisecond)
	defer keepAliveTicker.Stop()

	diffCh, err := getReplicationDiff(ctx, objectAPI, bucket, opts)
	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

      Header(RESPONSE_STATUS, "204"),
      Header(RESPONSE_STATUS, "206"),
      Header(RESPONSE_STATUS, "304"),
      Header(RESPONSE_STATUS, "400"),
      Header(RESPONSE_STATUS, "404"),
      Header(RESPONSE_STATUS, "500"),
      Header("accept-charset", ""),
      Header("accept-encoding", "gzip, deflate"),
      Header("accept-language", ""),
      Header("accept-ranges", ""),
      Header("accept", ""),

    peer.play()

    // Play it back.
    val connection = connect(peer)
    val stream = connection.newStream(headerEntries("b", "banana"), false)
    stream.readTimeout().timeout(500, TimeUnit.MILLISECONDS)
    val startNanos = System.nanoTime()
    assertFailsWith<InterruptedIOException> {
      stream.takeHeaders()
    }
    val elapsedNanos = System.nanoTime() - startNanos

	var progressTickerC <-chan time.Time
	if writer.getProgressFunc != nil {
		progressTicker = time.NewTicker(1 * time.Minute)
		progressTickerC = progressTicker.C
	}
	recordStagingTicker := time.NewTicker(500 * time.Millisecond)

	// Exit conditions:
	//
	// 1. If a writer.write() returns false, select loop below exits and
	// closes `doneCh` to indicate to caller to also exit.
	//

   *
   * <p>This class needs to write deserialized data into fields that are {@code final transient}.
   * Such writes will become impossible to perform in {@link #readObject} after JEP 500. Instead, we
   * must create a new instance with the desired field values, stash it in this field, and then
   * instruct Java serialization to use it instead of the originally created object.
   *

    // Enqueue a request that'll cause MockWebServer to hang on QueueDispatcher.dispatch().
    val connection = server.url("/").toUrl().openConnection() as HttpURLConnection
    connection.setReadTimeout(500)
    try {
      connection.getResponseCode()
      fail<Any>()
    } catch (expected: SocketTimeoutException) {
    }

    // Shutting down the server should unblock the dispatcher.
    server.shutdown()

Создавая веб‑API с FastAPI, если в нашем коде возникает ошибка, FastAPI обычно «локализует» её в пределах одного запроса, который эту ошибку вызвал. 🛡

Клиент получит **500 Internal Server Error** для этого запроса, но приложение продолжит работать для последующих запросов, а не «упадёт» целиком.

### Большие ошибки — падения { #bigger-errors-crashes }

 *     .build();
 * ```
 *
 * This example shows a call with a short 500 millisecond read timeout and a 1000 millisecond
 * write timeout. Original configuration is kept, but can be overriden.
 *
 * ```java
 * OkHttpClient eagerClient = client.newBuilder()
 *     .readTimeout(500, TimeUnit.MILLISECONDS)
 *     .build();
 * Response response = eagerClient.newCall(request).execute();
 * ```
 *

Der Client erhält für diesen Request einen **500 Internal Server Error**, aber die Anwendung arbeitet bei den nächsten Requests weiter, anstatt einfach komplett abzustürzen.

### Größere Fehler – Abstürze { #bigger-errors-crashes }

When building web APIs with FastAPI, if there's an error in our code, FastAPI will normally contain it to the single request that triggered the error. 🛡

The client will get a **500 Internal Server Error** for that request, but the application will continue working for the next requests instead of just crashing completely.

### Bigger Errors - Crashes { #bigger-errors-crashes }