Question

当我向主题队列发送消息时，我得到OperationCanceledException（我在Azure函数中运行我的代码）。我使用的版本是：“WindowsAzure.ServiceBus”：“4.1.1”（最新）当我进行负载测试时，我得到了这个异常，这意味着在这个服务总线中发送了许多消息（包含几个主题）。有人告诉我使用重试机制：

client.RetryPolicy = new RetryExponential(minBackoff: TimeSpan.FromSeconds(0.1),
                                            maxBackoff: TimeSpan.FromSeconds(30),
                                            maxRetryCount: 3);

但我认为这已经默认完成了，不是吗？

在此适合您的帮助 - 为什么我会收到此异常，我该怎么办才能解决此问题？

以下是例外：

Exception System.OperationCanceledException: The operation cannot be performed because the entity has been closed or aborted. ---> System.ServiceModel.CommunicationObjectAbortedException: Internal Server Error: The server did not provide a meaningful reply; this might be caused by a premature session shutdown. TrackingId:88386cb1-a4e6-42e2-a8e1-bad3a2403329, Timestamp:6/6/2017 7:55:23 AM
   at Microsoft.ServiceBus.Common.AsyncResult.End[TAsyncResult](IAsyncResult result)
   at Microsoft.ServiceBus.Messaging.Sbmp.DuplexRequestBindingElement.DuplexRequestSessionChannel.EndRequest(IAsyncResult result)
   at Microsoft.ServiceBus.Messaging.Channels.ReconnectBindingElement.ReconnectChannelFactory`1.RequestSessionChannel.RequestAsyncResult.<>c.<GetAsyncSteps>b__9_3(RequestAsyncResult thisPtr, IAsyncResult r)
   at Microsoft.ServiceBus.Messaging.IteratorAsyncResult`1.StepCallback(IAsyncResult result)
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.ServiceBus.Common.AsyncResult.End[TAsyncResult](IAsyncResult result)
   at Microsoft.ServiceBus.Messaging.Channels.ReconnectBindingElement.ReconnectChannelFactory`1.RequestSessionChannel.EndRequest(IAsyncResult result)
   at Microsoft.ServiceBus.Messaging.Sbmp.RedirectBindingElement.RedirectContainerChannelFactory`1.RedirectContainerSessionChannel.RequestAsyncResult.<>c__DisplayClass8_1.<GetAsyncSteps>b__4(RequestAsyncResult thisPtr, IAsyncResult r)
   at Microsoft.ServiceBus.Messaging.IteratorAsyncResult`1.StepCallback(IAsyncResult result)
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.ServiceBus.Common.AsyncResult.End[TAsyncResult](IAsyncResult result)
   at Microsoft.ServiceBus.Messaging.Sbmp.RedirectBindingElement.RedirectContainerChannelFactory`1.RedirectContainerSessionChannel.EndRequest(IAsyncResult result)
   at Microsoft.ServiceBus.Messaging.Channels.ReconnectBindingElement.ReconnectChannelFactory`1.RequestSessionChannel.RequestAsyncResult.<>c.<GetAsyncSteps>b__9_3(RequestAsyncResult thisPtr, IAsyncResult r)
   at Microsoft.ServiceBus.Messaging.IteratorAsyncResult`1.StepCallback(IAsyncResult result)
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.ServiceBus.Common.AsyncResult.End[TAsyncResult](IAsyncResult result)
   at Microsoft.ServiceBus.Messaging.Channels.ReconnectBindingElement.ReconnectChannelFactory`1.RequestSessionChannel.EndRequest(IAsyncResult result)
   at Microsoft.ServiceBus.Messaging.Sbmp.SbmpTransactionalAsyncResult`1.<>c.<GetAsyncSteps>b__18_3(TIteratorAsyncResult thisPtr, IAsyncResult a)
   at Microsoft.ServiceBus.Messaging.IteratorAsyncResult`1.StepCallback(IAsyncResult result)
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.ServiceBus.Common.AsyncResult.End[TAsyncResult](IAsyncResult result)
   at Microsoft.ServiceBus.Messaging.Sbmp.SbmpMessageSender.EndSendCommand(IAsyncResult result)
   --- End of inner exception stack trace ---
   at Microsoft.ServiceBus.Messaging.Sbmp.SbmpMessageSender.EndSendCommand(IAsyncResult result)
   at Microsoft.ServiceBus.Messaging.Sbmp.SbmpMessageSender.OnEndSend(IAsyncResult result)
   at Microsoft.ServiceBus.Messaging.IteratorAsyncResult`1.StepCallback(IAsyncResult result)
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.ServiceBus.Common.AsyncResult.End[TAsyncResult](IAsyncResult result)
   at Microsoft.ServiceBus.Messaging.MessageSender.OnSend(TrackingContext trackingContext, IEnumerable`1 messages, TimeSpan timeout)
   at Microsoft.ServiceBus.Messaging.MessageSender.Send(TrackingContext trackingContext, IEnumerable`1 messages, TimeSpan timeout)

Answer 1

默认情况下，ASB客户端启用了重试策略。你不需要自己动手。

你得到的例外是OperationCanceledException并且根据文件：

重试无济于事。

其中归类为“用户编码错误”。查看异常堆栈跟踪，这在发送操作期间发生，错误是

内部服务器错误：服务器未提供有意义的回复;这可能是由于过早的会话关闭造成的。 TrackingId：88386cb1-a4e6-42e2-a8e1-bad3a2403329 ...

我很确定这不是用户代码错误，而是发生在代理方面的事情。提供错误的TrackingId应该允许您打开与Microsoft的支持案例，以至少知道当该命令失败时代理上发生了什么。

修改

同时我建议用额外的重试/退避逻辑来实现你的操作。不会在紧密循环中重试的东西，并且不依赖于客户端的RetryPolicy。

发送到Service Bus时的OperationCanceledException

1 个答案: