FirebaseMessaging to iOS stopped working, status=Faulted

[chrwei]

.net 4.6.1, FirebaseAdmin v2.0.0 from nuget

I had this all working about a month ago. At some point it stopped sending iOS notifications, but Android still works.

                Message m = new Message() {
                    Android = new AndroidConfig() {
                        Priority = Priority.High,
                        Notification = new AndroidNotification() {
                            Sound = "default"
                        }
                    },
                    Notification = new Notification() {
                        Title = msg.title,
                        Body = msg.body
                    },
                    Apns = new ApnsConfig() {
                        Aps = new Aps() {
                            Badge = 1,
                            Sound = "default"
                        }
                    },
                    Token = msg.devicetoken
                };
                FirebaseMessaging.DefaultInstance.SendAsync(m).ContinueWith(t => Log("Recieved: " + t.Status.ToString()));

t just has an id and status="Faulted".

I've tried removing the AndroidConfig for ios devices, and I've tried adding an ApsAlert to the Aps, but the result is always the same. I've even tried recreated the service account key, using an apn cert instead of a key, and generating a new apns key. No change for all 3, separately.

What can I do to find out what Faulted means, and what's changed to have APNs stop working but Android push keep working?

[google-oss-bot]

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[hiranya911]

I'd say start by looking at t.Exception. If the task faulted, you should be able to get hold of the underling exception this way.

If it looks like a problem with the FCM service, please reach out to Firebase Support and provide details of your project: https://firebase.google.com/support

[chrwei]

it certainly could be more clear in the docs than an exception doesn't throw.

looks like all the iOS tokens are coming back unregistered.

[hiranya911]

Task continuations in C# don't throw. So you must check task.Status and task.Exception. You should use await for conventional exception throw.

try
{
  await FirebaseMessaging.DefaultInstance.SendAsync(m);
}
catch (FirebaseMessagingException e)
{
  if (e.MessagingErrorCode == MessagingErrorCode.Unregistered)
  {
    Console.WriteLine("Token unregistered");
  }
}