ios - Azure Notification Hub registrations disappear when sending a notification

Question

Recently our Azure Notification Hub became a very mysterious entity. When Apple devices register we can see them in Service Bus Explorer and as soon as we try sending any notifications (from SBE or Azure Portal) we get a "Notification Successful" message, but nothing appears on the device. Refreshing registration list uncovers the fact that the registrations were deleted.

We are not removing them anywhere in code, and the TTL has not expired.

Any suggestions?

Answer 1

Notification hub cleans up registrations with invalid tokens during the send flow. Looks like for some reasons APNS rejects your tokens and NH just removes registrations. Make sure:

1. you are getting token from physical device (not emulator);
2. APNS certificate uploaded to NH is not expired;
3. APNS certificate uploaded to NH corresponds APNS endpoint you are using in application (sandbox or production).