Azure 服務總線重試選項不起作用

Question

運氣不好，我嘗試配置我的 ServiceBusClient 以重試固定延遲為 10 秒的消息。 我還嘗試了指數重試配置。 但是，代碼總是在一秒或兩秒內重試消息並完全忽略配置。 它甚至忽略了 MaxRetries 並且只重試 10 次，該值在 Azure Portal 中為隊列配置。 我究竟做錯了什么？

我正在使用Azure.Messaging.ServiceBus庫，NuGet package 7.0.0。

代碼：

ServiceBusClient client = new ServiceBusClient(serviceBusConnectionString, new ServiceBusClientOptions()
            {
                RetryOptions = new ServiceBusRetryOptions()
                {
                    Mode = ServiceBusRetryMode.Fixed,
                    Delay = TimeSpan.FromSeconds(10),
                    MaxDelay = TimeSpan.FromMinutes(3),
                    MaxRetries = 30
                }
            });

ServiceBusProcessor processor = client.CreateProcessor(queueName, new ServiceBusProcessorOptions());

// throwing an exception in MyMessageHandlerAsync on purpose
// to test out the retries configuration
processor.ProcessMessageAsync += MyMessageHandlerAsync;

// The uncaught exception causes this method to execute. 
// Processing is attempted 10 times with
// virtually no delay between each attempt.
// After the 10th attempt, the message goes to deadletter,
// which is expected.
processor.ProcessErrorAsync += MyErrorHandler;

---

收到第一個回復后，我在這個問題上添加了更多內容：

目前，MyMessageHandlerAsync 是：

    private async Task MyMessageHandlerAsync(EventArgs eventArgs)
    {
        var args = (ProcessMessageEventArgs)eventArgs;

        var body = args.Message.Body.ToString();
        
        // ...
        // process body
        // ...

        await args.CompleteMessageAsync(args.Message);
    }

我應該如何更改方法的內容以重試非瞬態 ServiceBusException？ 請幫助提供以下 TODO 的代碼：

    private async Task MyMessageHandlerAsync(EventArgs eventArgs)
    {
        var args = (ProcessMessageEventArgs)eventArgs;

        try
        {

            var body = args.Message.Body.ToString();
        
            // ...
            // process body
            // ...

            await args.CompleteMessageAsync(args.Message);
        }
        catch (ServiceBusException sbe)
        {
            if (sbe.IsTransiet)
            {
                // TODO: Is it correct that the exponential retry will work
                // here?  The one defined in the ServiceBusClient.
                // So, no code is needed here, just throw.
                throw;
            }
            else
            {
                // TODO: for non-transient, this is where the
                //       options in the ServiceBusClient don't apply.
                //       Is that correct?  How do I do an
                //       exponential retry here?
            }
        }
        catch (Exception e)
        {
            // TODO: same problem as else in first catch.
        }
    }

Answer 1

ServiceBusRetryOptions旨在供 ASB 客戶端在存在不會立即冒泡到您的代碼的暫時性錯誤時使用，即客戶端內置的內部重試機制，在引發異常之前代表您執行重試。

使用重試策略向 ASB 客戶端指定在放棄之前如何處理暫時性錯誤，而不是消息處理程序拋出錯誤的次數：