Azure Notification Hub. The remote server returned an error: (404) Not Found. NotificationId cannot be found

Question

我正在使用 Azure .Net SDK。当我执行 SendDirectNotificationAsync 时，我收到 NotificationOutcome。然后我从结果中得到 NotificationId，然后我立即得到 GetNotificationOutcomeDetailsAsync。我收到 404 错误的响应。但是如果我尝试再重复一次，我会得到 NotificationDetail。

代码：

var outcome = hub.SendDirectNotificationAsync(notification, messageCreated.Entity.PushToken).Result;

不幸的是，我没有使用 await 的选项。

异常：

Microsoft.Azure.NotificationHubs.Messaging.MessagingEntityNotFoundException: The remote server returned an error: (404) Not Found. NotificationId 'dcd8c78360d24dfa9e99dadfc6b68593-20180403085427-2001954715-1' cannot be found.TrackingId:1f5a51d0-547a-428d-a845-7a164baebf74_G13,TimeStamp:4/3/2018 8:54:27 AM
  Module "Microsoft.Azure.NotificationHubs.Common.ExceptionDispatcher", line 7, col 0, in Throw
    Void Throw(System.Exception)
  Module "Microsoft.Azure.NotificationHubs.Common.AsyncResult", line 310, col 0, in End
    TAsyncResult End[TAsyncResult](System.IAsyncResult)
  Module "Microsoft.Azure.NotificationHubs.NotificationHubManager+<>c", line 0, col 0, in GetNotificationAsync { <lambda> }
    Microsoft.Azure.NotificationHubs.NotificationDetails <GetNotificationAsync>b__24_1(System.IAsyncResult)
  Module "System.Threading.Tasks.TaskFactory 1", line 15, col 0, in FromAsyncCoreLogic
    Void FromAsyncCoreLogic(System.IAsyncResult, System.Func 2[System.IAsyncResult,TResult], System.Action 1[System.IAsyncResult], System.Threading.Tasks.Task 1[TResult], Boolean)
System.Net.WebException: The remote server returned an error: (404) Not Found.
  Module "System.Net.HttpWebRequest", line 273, col 0, in EndGetResponse
    System.Net.WebResponse EndGetResponse(System.IAsyncResult)
  Module "Microsoft.Azure.NotificationHubs.NotificationRequestAsyncResult 1+<>c", line 0, col 0, in GetAsyncSteps { <lambda> }
    Void <GetAsyncSteps>b__26_3(TAsyncResult, System.IAsyncResult)
  Module "Microsoft.Azure.NotificationHubs.Messaging.IteratorAsyncResult`1", line 44, col 0, in StepCallback
    Boolean StepCallback(System.IAsyncResult)

有人可以提供帮助吗？

Answer 1

AFAIK，GetNotificationOutcomeDetailsAsync 将利用 REST API Per Message Telemetry: Get Notification Message Telemetry。对于404响应码，官方文档有如下说明：

Telemetry does not exist. This may be because the notification ID is invalid or because the message has not progressed far enough in processing. If you receive a 404 code, wait and try again after 10s. This state can continue for up to 30 minutes.

注意：以上API仅适用于Standard tier notification hubs. Moreover, you could follow Diagnose dropped notifications in Notification Hubs，缩小问题范围

Azure Notification Hub. The remote server returned an error: (404) Not Found. NotificationId cannot be found

Azure Notification Hub. The remote server returned an error: (404) Not Found. NotificationId cannot be found

c#

.net

azure

azure-notificationhub

azure-sdk-.net