ios - Sending 10000+ push notifications but not all devices receive it -


for our ios news apps send out more 10000 push notifications registered devices, somehow not devices seem receive notification. have been doing years received user feedback stating did not receive push notification while did register device receive them.

our logs show these specific devices registered , there no errors sending push notification, somehow apns not deliver notification. have seen removing app device , reinstalling solves problem still concerned.

we think must apple's service fails deliver push notification sometimes, when comes sending large amounts of notifications. of experienced this?

the apple docs says this:

important: delivery of notifications “best effort”, not guaranteed.

have checked payload size? per apple's documentation, maximum size allowed notification payload 256 bytes.


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