InternalServerError when sending push message to iOS device through FCM

[Ulrik Gammelby]

Hello,

I am struggling with sending push notifications through FCM - the console says "Failed" when sending to a specific device. If sending to all, it says success but I don't see any notification. When sending through curl, I get an internal server error:

curl --header "Content-Type: application/json" --header "Authorization: key=AAAAs...Ukq-6" https://fcm.googleapis.com/fcm/send -d '{"notification": {"body": "Hello from curl via FCM!", "sound": "default"}, "priority": "high", "to": "f5au...Qpi"}' --verbose

Which yields the following output:

...

< HTTP/2 200 

...

{"multicast_id":6251413622120464223,"success":0,"failure":1,"canonical_ids":0,"results":[{"error":"InternalServerError"}]}

If I specify a wrong recipient, I get an InvalidRegistration error as expected. Similarly, a bad auth key yields some authentication error as expected. Valid input yields the shown internal server error.

I followed the debugging guidelines in https://firebase.googleblog.com/2017/01/debugging-firebase-cloud-messaging-on.html. I can send notifications to the app through APN with curl just fine.

Any ideas about what is going on? And most importantly, how to debug situations like this further ourselves?

Thanks!

Ulrik

[Diego Giorgini]

Hi Ulrik,

please contact https://firebase.google.com/support/ which is better suited to provide 1:1 support.

Thanks

- Diego

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