AppEngine lost connection to FireBase after ~16h

[ivbar]

Hello,
Have deployed AppEngine Java part and after ~16h it stops receiving updates from FireBase.
If I restart AppEngine instance it start working.

I use gradle and firebase-server-sdk:3.0.0 (have just updated to 3.0.1 may be it will work).

Could you help? Do you need any other information?

[misterwilliam]

I'll look into it. The most obvious source of problem is that you did not set up manual scaling. That is done in this file: https://github.com/misterwilliam/gae-firebase-event-proxy/blob/master/gae-firebase-event-proxy/src/main/webapp/WEB-INF/appengine-web.xml

The app engine documentation on manual scaling is here:
https://cloud.google.com/appengine/docs/java/an-overview-of-app-engine#scaling_types_and_instance_classes

The need for manual scaling is explained here:
https://cloud.google.com/solutions/mobile/firebase-app-engine-android-studio#configuring_the_servlet

[misterwilliam]

I've been able to replicate the behavior, I'll look into how to fix it.

[ivbar]

Yes, I've set up manual scaling.

With firebase-server-sdk:3.0.1 seems to be solved.
Server already connected more than a day.
Will keep monitoring.

[ivbar]

Server connection to firebase lost even with 3.0.1

onCancelled in ChildEventListener is not fired when connection lost

[misterwilliam]

I am seeing the same thing as well, and I am still looking into a fix.