在我的MVC应用程序中，有时会出现如下异常:
System.Net.WebException: The request was aborted: The request was canceled.
at System.Net.HttpWebRequest.BeginGetRequestStream(AsyncCallback callback, Object state)
at System.Net.Http.HttpClientHandler.StartGettingRequestStream(RequestState state)
at System.Net.Http.HttpClientHandler.<>c__DisplayClass4.<PrepareAndStartContentUpload>b__0(Task task)
at System.Threading.Tasks.Task.Execute()
--- End of inner exception stack trace ---
编辑
这是我看到的另一种:
System.Exception: Unhandled Task Error ---> System.NullReferenceException: Object reference not set to an instance of an object.
at System.Web.HttpApplication.PipelineStepManager.ResumeSteps(Exception error)
at System.Web.HttpApplication.ResumeStepsFromThreadPoolThread(Exception error)
at System.Web.HttpApplication.CallHandlerExecutionStep.OnAsyncHandlerCompletion(IAsyncResult ar)
at System.Threading.Tasks.Task.Execute()
--- End of inner exception stack trace ---
这是我在事件日志中看到的内容，但在时间或计数上并没有完全相关。
A fatal alert was generated and sent to the remote endpoint. This may result in termination of the connection. The TLS protocol defined fatal error code is 40. The Windows SChannel error state is 1205.
An TLS 1.2 connection request was received from a remote client application, but none of the cipher suites supported by the client application are supported by the server. The SSL connection request has failed.
/编辑
有没有办法确定异常的来源/位置或获取有关异常来源的任何其他信息？
编辑2
这是我看到的另一个。它们都与OnAsyncHandlerCompletion有关，但是我不确定源是什么。
System.Exception: Unhandled Task Error ---> System.NullReferenceException: Object reference not set to an instance of an object.
at System.Web.HttpApplication.get_CurrentModuleContainer()
at System.Web.HttpApplication.PipelineStepManager.ResumeSteps(Exception error)
at System.Web.HttpApplication.ResumeStepsFromThreadPoolThread(Exception error)
at System.Web.HttpApplication.CallHandlerExecutionStep.OnAsyncHandlerCompletion(IAsyncResult ar)
at System.Threading.Tasks.Task.Execute()
--- End of inner exception stack trace ---
/编辑2
最佳答案
您可以订阅TaskScheduler.UnobservedTaskException事件，并可能获取有关该异常的更多信息。
关于c# - UnobservedTaskException-任务来自哪里，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/33698395/