GCM duplicated messages

Question

I have an app based on Google Cloud Messaging and it was working well. Now (today) all of a sudden it started having a problem we\'ve never seen before. For each message sen

Answer 1

We also have the same problem, and we are sure we don't send the message twice. It could be an issue related to what's explained here about "Canonical IDs": http://developer.android.com/google/gcm/adv.html

[...] However, if a bug in the application triggers multiple registrations for the same device, it can be hard to reconcile state and you might end up with duplicate messages.

Answer 2

Same problem here. We have many apps integraded with MyMalcom and Urban Airship and all of them are getting pushes twice since Monday. We have checked also the canonicalId changes as suggested by Ferran, but the delivered to GCM messages are ok (no cannonical Id changes).

Answer 3

https://groups.google.com/forum/#!topic/android-gcm/EHZUTEJMeyw

Check the official GCM thread above. Everyone is experiencing this issue. Google's fault!