Firestore stops updating after losing and regaining an internet connection

Question

I have set up some listeners like so:

deviceListener = db.addSnapshotListener(this::handleDbChange)

When I have a stable internet connection, the handler fires on a data change and allows me to update my application. However, when I lose and regain an internet connection the handler ceases to fire. This doesn't always occur on the first loss of connection, but it always occurs after 2 or 3 drops in my connection.

I have tried removing the listeners and re-adding them when the network changes. Additionally, I tried getting the data directly after the network connection is reestablished:

db.get().add().addOnCompleteListener {
   val snapshot = it.result
   snapshot.toObject(Model::class.java)
}

But, this still serves the stale data. The only way I've found to correct this issue is restarting the app.

If anyone else has encountered this issue, I'd appreciate any insight you may have on how to solve it. FYI, I'm using the com.google.firebase:firebase-firestore:17.0.2 version of the library.

Answer 1

I know its a late reply, and i'm only a novice here (so I could be wrong), but for anyone else to come across this... it may be a combination of the problem I had:

Firebase Firestore batch command wont commit after regaining connection

And the problem someone else had:

Firestore doesn't immediately start listening to changes when Internet Connection Resumes

In summary:
Ensure you test without an emulator.
If you need live data, turn data persistence off.
And Firestore may use an uncontrollable timer to dictate when it reconnects its listeners after a connection is regained.