Drop in delivery rate after migration from legacy FCM to HTTP V1

[Anubhav Nema]

Hi All,

We have recently migrated from legacy FCM API to HTTP V1, and we have observed a significant drop in delivery rate.
To make sure it was due to migration, we have reverted to the old legacy FCM API, and the delivery rate is back to normal.

We have around 71% delivery rate on legacy FCM which is now reduced to around 56% after migration to HTTP V1.

Can somebody please help here? 

[Arthur Thompson]

Hi Anubhav,

Could you provide a bit more context around how you are targeting those notifications: topics/tokens...?

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[Anubhav Nema]

Hi Arthur,

We are using tokens to target these notifications.

[Arthur Thompson]

Hi Anubhav,

There was a recent issue related to messages sent with a TTL of 0. This issue has been resolved now. Were any of your messages being sent with TTL of 0?

To view this discussion on the web visit https://groups.google.com/d/msgid/firebase-talk/68b4ef58-4e2e-4e56-b085-58b71cf5188dn%40googlegroups.com.

[Anubhav Nema]

Hi Arthur,

No, we haven't sent any message with a TTL of 0. We had set a TTL of 345600 and it's used for all the messages sent by us.

[Arthur Thompson]

Interesting, here is a link with the timeline of the issue I think is related:

https://status.firebase.google.com/incidents/YGnQqhbvCVVqEAYymruN

Could you confirm if you were experiencing the issue during that time?

To view this discussion on the web visit https://groups.google.com/d/msgid/firebase-talk/0470d9f3-b10d-4f06-be8f-58dc0f5807can%40googlegroups.com.

[Anubhav Nema]

Hi Arthur,

We have been facing this issue since 24th of the July, when we moved our whole fleet of boxes to the new GCM HTTP V1 code.