ANR for Firebase Performance

[READ] Step 1: Are you in the right place?

I do. reporting an ANR coming from RemoteConfigComponent (as far as I can say)

[REQUIRED] Step 2: Describe your environment

Firebase BoM 25.6.0 (Firebase Perf 19.0.8 if I’m not mistaken)

[REQUIRED] Step 3: Describe the problem

We are experiencing thousands ANRs at FirebasePerformance creation step. Looking at the source code, I believe the thread blocks trying to get/create an instance from RemoteConfigComponent.get("fireperf"). that method is access from main thread, is synchronized and internally it executes a few disk accesses.

Here is a stacktrace of the main thread and another one, both blocked.

Main thread:

at com.google.firebase.perf.zza.create (zza.java:2)
  at com.google.firebase.components.ComponentRuntime.lambda$new$0 (ComponentRuntime.java:69)
  at com.google.firebase.components.ComponentRuntime$$Lambda$1.get (ComponentRuntime.java)
  at com.google.firebase.components.Lazy.get (Lazy.java:53)
  at com.google.firebase.components.ComponentRuntime.initializeEagerComponents (ComponentRuntime.java:158)
  at com.google.firebase.FirebaseApp.initializeAllApis (FirebaseApp.java:563)
  at com.google.firebase.FirebaseApp.initializeApp (FirebaseApp.java:304)
  at com.google.firebase.FirebaseApp.initializeApp (FirebaseApp.java:268)
  at com.careem.superapp.core.analytics.impl.firebase.FirebaseInitializer.initialize (FirebaseInitializer.java:33)
  at com.careem.superapp.initialization.BaseSuperApp.onCreate (BaseSuperApp.java:58)
  at com.careem.superapp.SuperApp.onCreate (SuperApp.java:44)
  at android.app.Instrumentation.callApplicationOnCreate (Instrumentation.java:1155)
  at android.app.ActivityThread.handleBindApplication (ActivityThread.java:6315)
  at android.app.ActivityThread.access$1300 (ActivityThread.java:220)
  at android.app.ActivityThread$H.handleMessage (ActivityThread.java:1815)
  at android.os.Handler.dispatchMessage (Handler.java:106)
  at android.os.Looper.loop (Looper.java:226)
  at android.app.ActivityThread.main (ActivityThread.java:7224)
  at java.lang.reflect.Method.invoke (Method.java)
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:500)
  at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:913)

Other thread:

at com.google.firebase.components.Lazy.get (SourceFile:3)
  at g.k.c.d.a.get (SourceFile:2)
  at com.google.firebase.components.ComponentRuntime.get (SourceFile:1)
  at com.google.firebase.FirebaseApp.get (SourceFile:2)
  at com.google.firebase.perf.FirebasePerformance.getInstance (SourceFile:5)
  at com.google.firebase.perf.internal.zzd.zzbt (SourceFile:2)
  at com.google.firebase.perf.internal.zzd.zzc (SourceFile:2)
  at g.k.c.k.a.b.run (SourceFile:1)
  at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1167)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:641)
  at java.lang.Thread.run (Thread.java:764)

Steps to reproduce:

Sorry, can’t repro locally. but the above stack trace should give an indication. I don’t think is relevant, but also wanted to add we disabled the FirebaseInitProvider and we init manually

Relevant Code:

[ramanpreetSinghKhinda]

@carlonzo

The fix will go in the upcoming release. You can keep an eye on the release notes for Firebase Performance.

Please reopen if the issue still persists with the latest perf sdk version.

[ramanpreetSinghKhinda]

Thanks for checking in @carlonzo

Not currently unfortunately 😐

But once firebase-perf SDK gets open sourced you should be able to see the PRs and the code. This is currently in pipeline and will take a while. You can keep an eye on the Firebase Android Open Source Repo.