Question

下面的代码启用2级重试和IErrorHandler。

问题在于，从不调用IErrorHandler。

    var activator = new BuiltinHandlerActivator();

   activator.Register((bus, mc) => new Handler(mc, bus));
        Configure.With(activator)
           .Transport(t => t.UseAzureServiceBus(Consts.ServiceBusConnectionString, Consts.Subscriber1))
           .Options(o =>
                    {

              o.SimpleRetryStrategy(maxDeliveryAttempts: 2,
                                              secondLevelRetriesEnabled: true,
                                              errorQueueAddress: "poison");

             o.Decorate<IErrorHandler>(c => new MyErrorHandler(c.Get<IErrorHandler>()));


                    }).Start();

处理程序

class Handler : IHandleMessages<string>,
          IHandleMessages<IFailed<object>>
    {
        readonly IBus _bus;
        readonly IMessageContext _messageContext;
        public Handler(IMessageContext messageContext, IBus bus)
        {
            _messageContext = messageContext;
            _bus = bus;
        }

        public async Task Handle(string message)
        {
            Console.WriteLine("Handle(string message): {0}", message);
            throw new Exception("Handle(string message)");
        }

        public async Task Handle(IFailed<Object> message)
        {
            Console.WriteLine("Handle(IFailed<Object> message): {0}", message);
            await _bus.Advanced.TransportMessage.Defer(TimeSpan.FromSeconds(2));

        }

    }

具体来说，以下是执行第一级和第二级重试的顺序：

基于maxDeliveryAttempts的调用序列为2：

1个调用句柄（字符串消息），在Handle（字符串消息）中引发异常

2调用句柄（字符串消息）在Handle（字符串消息）中引发异常

3个呼叫句柄（失败消息）

4个呼叫句柄（失败消息）

5个调用句柄（字符串消息），在Handle（字符串消息）中引发异常

6个呼叫句柄（失败消息）

永久重复5和6

问题A：

为什么不调用IErrorHandler？

如何基于2的maxDeliveryAttempts调用Handle（失败消息）两次后调用IErrorHandler。

也就是说：

基于maxDeliveryAttempts的调用序列为2：

1个调用句柄（字符串消息），在Handle（字符串消息）中引发异常

2调用句柄（字符串消息）在Handle（字符串消息）中引发异常

3个呼叫句柄（失败消息）

4个呼叫句柄（失败消息）

5调用IErrorHandler

6移至下一条消息

更新

在IHandleMessages<IFailed<string>>上也会发生同样的问题。

更新2

以下错误：

 Severity   Code    Description Project File    Line    Suppression State
 Error      Unable to locate repository containing directory
 'C:\ReBus\Rebus-master\Rebus'. Rebus   C:\Users\username\.nuget\packages\microsoft.build.tasks.git\1.0.0-beta-63127-02\build\Microsoft.Build.Tasks.Git.targets 20

点击上面的错误会在VS中显示

<Microsoft.Build.Tasks.Git.LocateRepository Directory="$(MSBuildProjectDirectory)" >
  <Output TaskParameter="Id" PropertyName="_GitRepositoryRoot" />
</Microsoft.Build.Tasks.Git.LocateRepository>

更新3 运行此https://github.com/rebus-org/Rebus/blob/master/Rebus.Tests/Bugs/VerifyThisParticularThingAboutSecondLevelRetries.cs

的以下结果

[INF] Rebus.Threading.TaskParallelLibrary.TplAsyncTask (Worker#3): Starting periodic task "CleanupTrackedErrors" with interval 00:00:10
[INF] Rebus.Threading.TaskParallelLibrary.TplAsyncTask (Worker#3): Starting periodic task "DueMessagesSender" with interval 00:00:01
[INF] Rebus.Bus.RebusBus (Worker#3): Bus "Rebus 1" setting number of workers to 1
[DBG] Rebus.Bus.RebusBus (Worker#3): Adding worker "Rebus 1 worker 1"
[INF] Rebus.Bus.RebusBus (Worker#3): Bus "Rebus 1" started
[DBG] Rebus.Workers.ThreadPoolBased.ThreadPoolWorker (Rebus 1 worker 1): Starting (threadpool-based) worker "Rebus 1 worker 1"
[DBG] Rebus.Pipeline.Send.SendOutgoingMessageStep (Worker#3): Sending "HEJ MED DIG" -> "whatever"
Handle(string message): HEJ MED DIG
[WRN] Rebus.Retry.ErrorTracking.InMemErrorTracker (Rebus 1 worker 1): Unhandled exception 1 while handling message with ID "667c8cfd-5ce5-46a6-9394-32d1386ef7de"
System.Exception: Handle(string message)
   at Rebus.Tests.Bugs.VerifyThisParticularThingAboutSecondLevelRetries.Handler.<Handle>d__4.MoveNext() in C:\ReBus\Rebus.Tests\Bugs\VerifyThisParticularThingAboutSecondLevelRetries.cs:line 81
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Rebus.Pipeline.Receive.HandlerInvoker`1.<Invoke>d__14.MoveNext() in C:\ReBus\Rebus\Pipeline\Receive\HandlerInvoker.cs:line 154
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Rebus.Pipeline.Receive.DispatchIncomingMessageStep.<Process>d__3.MoveNext() in C:\ReBus\Rebus\Pipeline\Receive\DispatchIncomingMessageStep.cs:line 66
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Rebus.Sagas.LoadSagaDataStep.<Process>d__6.MoveNext() in C:\ReBus\Rebus\Sagas\LoadSagaDataStep.cs:line 66
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Rebus.Pipeline.Receive.ActivateHandlersStep.<Process>d__3.MoveNext() in C:\ReBus\Rebus\Pipeline\Receive\ActivateHandlersStep.cs:line 47
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Rebus.Pipeline.Receive.HandleRoutingSlipsStep.<Process>d__3.MoveNext() in C:\ReBus\Rebus\Pipeline\Receive\HandleRoutingSlipsStep.cs:line 40
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Rebus.Retry.Simple.FailedMessageWrapperStep.<Process>d__2.MoveNext() in C:\ReBus\Rebus\Retry\Simple\FailedMessageWrapperStep.cs:line 42
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Rebus.Pipeline.Receive.DeserializeIncomingMessageStep.<Process>d__2.MoveNext() in C:\ReBus\Rebus\Pipeline\Receive\DeserializeIncomingMessageStep.cs:line 34
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Rebus.DataBus.ClaimCheck.HydrateIncomingMessageStep.<Process>d__2.MoveNext() in C:\ReBus\Rebus\DataBus\ClaimCheck\HydrateIncomingMessageStep.cs:line 51
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Rebus.Pipeline.Receive.HandleDeferredMessagesStep.<Process>d__12.MoveNext() in C:\ReBus\Rebus\Pipeline\Receive\HandleDeferredMessagesStep.cs:line 121
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Rebus.Retry.FailFast.FailFastStep.<Process>d__3.MoveNext() in C:\ReBus\Rebus\Retry\FailFast\FailFastStep.cs:line 51
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Rebus.Retry.Simple.SimpleRetryStrategyStep.<DispatchWithTrackerIdentifier>d__10.MoveNext() in C:\ReBus\Rebus\Retry\Simple\SimpleRetryStrategyStep.cs:line 118
Handle(string message): HEJ MED DIG
[WRN] Rebus.Retry.ErrorTracking.InMemErrorTracker (Rebus 1 worker 1): Unhandled exception 2 while handling message with ID "667c8cfd-5ce5-46a6-9394-32d1386ef7de"
System.Exception: Handle(string message)
   at Rebus.Tests.Bugs.VerifyThisParticularThingAboutSecondLevelRetries.Handler.<Handle>d__4.MoveNext() in C:\ReBus\Rebus.Tests\Bugs\VerifyThisParticularThingAboutSecondLevelRetries.cs:line 81
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Rebus.Pipeline.Receive.HandlerInvoker`1.<Invoke>d__14.MoveNext() in C:\ReBus\Rebus\Pipeline\Receive\HandlerInvoker.cs:line 154
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Rebus.Pipeline.Receive.DispatchIncomingMessageStep.<Process>d__3.MoveNext() in C:\ReBus\Rebus\Pipeline\Receive\DispatchIncomingMessageStep.cs:line 66
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Rebus.Sagas.LoadSagaDataStep.<Process>d__6.MoveNext() in C:\ReBus\Rebus\Sagas\LoadSagaDataStep.cs:line 66
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Rebus.Pipeline.Receive.ActivateHandlersStep.<Process>d__3.MoveNext() in C:\ReBus\Rebus\Pipeline\Receive\ActivateHandlersStep.cs:line 47
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Rebus.Pipeline.Receive.HandleRoutingSlipsStep.<Process>d__3.MoveNext() in C:\ReBus\Rebus\Pipeline\Receive\HandleRoutingSlipsStep.cs:line 40
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Rebus.Retry.Simple.FailedMessageWrapperStep.<Process>d__2.MoveNext() in C:\ReBus\Rebus\Retry\Simple\FailedMessageWrapperStep.cs:line 42
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Rebus.Pipeline.Receive.DeserializeIncomingMessageStep.<Process>d__2.MoveNext() in C:\ReBus\Rebus\Pipeline\Receive\DeserializeIncomingMessageStep.cs:line 34
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Rebus.DataBus.ClaimCheck.HydrateIncomingMessageStep.<Process>d__2.MoveNext() in C:\ReBus\Rebus\DataBus\ClaimCheck\HydrateIncomingMessageStep.cs:line 51
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Rebus.Pipeline.Receive.HandleDeferredMessagesStep.<Process>d__12.MoveNext() in C:\ReBus\Rebus\Pipeline\Receive\HandleDeferredMessagesStep.cs:line 121
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Rebus.Retry.FailFast.FailFastStep.<Process>d__3.MoveNext() in C:\ReBus\Rebus\Retry\FailFast\FailFastStep.cs:line 51
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Rebus.Retry.Simple.SimpleRetryStrategyStep.<DispatchWithTrackerIdentifier>d__10.MoveNext() in C:\ReBus\Rebus\Retry\Simple\SimpleRetryStrategyStep.cs:line 118
Handle(IFailed<Object> message): FAILED: HEJ MED DIG
[DBG] Rebus.Pipeline.Receive.DispatchIncomingMessageStep (Rebus 1 worker 1): Dispatching "System.String, mscorlib" "667c8cfd-5ce5-46a6-9394-32d1386ef7de" to 1 handlers took 4 ms
Disposing Rebus.Activation.BuiltinHandlerActivator
[DBG] Rebus.Pipeline.Receive.HandleDeferredMessagesStep (Rebus 1 worker 1): Deferring message "String/667c8cfd-5ce5-46a6-9394-32d1386ef7de" until 2019-06-04T10:36:51.6554132+01:00
[INF] Rebus.Bus.RebusBus (Worker#3): Bus "Rebus 1" setting number of workers to 0
[DBG] Rebus.Workers.ThreadPoolBased.ThreadPoolWorker (Rebus 1 worker 1): Worker "Rebus 1 worker 1" stopped
[DBG] Rebus.Bus.RebusBus (Worker#3): Removing worker "Rebus 1 worker 1"
[INF] Rebus.Threading.TaskParallelLibrary.TplAsyncTask (Worker#3): Stopping periodic task "DueMessagesSender"
[INF] Rebus.Threading.TaskParallelLibrary.TplAsyncTask (Worker#3): Stopping periodic task "CleanupTrackedErrors"
[INF] Rebus.Bus.RebusBus (Worker#3): Bus "Rebus 1" stopped
Disposing System.Threading.ManualResetEvent

Answer 1

日志怎么说？

为帮助您上路，我刚刚创建了这个小测试用例，并验证了它确实可以按预期工作：VerifyThisParticularThingAboutSecondLevelRetries.cs

如果运行测试，它应该记录一堆东西（即，两次传递尝试中的堆栈跟踪），然后将消息作为IFailed<object>分派，这与处理程序兼容为(const unsigned char*)pFileBothDirInfo。

始终运行第一级和第二级重试，不调用IErrorHandler

1 个答案: