Firestore Internal Error (21.1.1)

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

Issues filed here should be about bugs in the code in this repository. If you have a general question, need help debugging, or fall into some other category use one of these other channels:

• For general technical questions, post a question on StackOverflow with the firebase tag.
• For general Firebase discussion, use the firebase-talk google group.
• For help troubleshooting your application that does not fall under one of the above categories, reach out to the personalized Firebase support channel.

[REQUIRED] Step 2: Describe your environment

• Android Studio version: 3.5
• Firebase Component: Firestore (Database, Firestore, Storage, Functions, etc)
• Component version: 21.1.1

[REQUIRED] Step 3: Describe the problem

Firestore is crashing sporadically in production. I’m seeing the following stack traces together in Crashlytics.

Fatal Exception: java.lang.RuntimeException: Internal error in Cloud Firestore (21.1.1).
       at com.google.firebase.firestore.util.AsyncQueue.lambda$panic$3(AsyncQueue.java:529)
       at com.google.firebase.firestore.util.AsyncQueue$$Lambda$3.run(AsyncQueue.java:2000)
       at android.os.Handler.handleCallback(Handler.java:873)
       at android.os.Handler.dispatchMessage(Handler.java:99)
       at android.os.Looper.loop(Looper.java:214)
       at android.app.ActivityThread.main(ActivityThread.java:7073)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:965)

com.google.firebase.firestore.core.SyncEngine.handleCredentialChange (SyncEngine.java:599)
com.google.firebase.firestore.core.FirestoreClient.lambda$new$0 (FirestoreClient.java:105)
com.google.firebase.firestore.core.FirestoreClient$$Lambda$15.run (FirestoreClient.java:3599)
com.google.firebase.firestore.util.AsyncQueue.lambda$enqueue$2 (AsyncQueue.java:431)
com.google.firebase.firestore.util.AsyncQueue$$Lambda$2.call (AsyncQueue.java:2000)
com.google.firebase.firestore.util.AsyncQueue$SynchronizedShutdownAwareExecutor.lambda$executeAndReportResult$1 (AsyncQueue.java:317)
com.google.firebase.firestore.util.AsyncQueue$SynchronizedShutdownAwareExecutor$$Lambda$2.run (AsyncQueue.java:2317)
java.util.concurrent.Executors$RunnableAdapter.call (Executors.java:459)
java.util.concurrent.FutureTask.run (FutureTask.java:266)
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run (ScheduledThreadPoolExecutor.java:301)
java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1167)
java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:641)
com.google.firebase.firestore.util.AsyncQueue$SynchronizedShutdownAwareExecutor$DelayedStartFactory.run (AsyncQueue.java:224)
java.lang.Thread.run (Thread.java:764)

Steps to reproduce:

This is happening in production and being reported back to my via Crashlytics.

[schmidt-sebastian]

@MattSkala Thanks for the hint with BroadcastReceiver. Fix for this NPE is coming.

[MattSkala]

We have been seeing similar crashes in production for several months now. If it helps, it seems that all of them happen when the app is launched in background using BroadcastReceiver. We are considering to deploy the app with de-obfuscated Firestore classes in the next release, so we can get a better stack trace.

For now, my guess is that user or syncEngine is null here:

https://github.com/firebase/firebase-android-sdk/blob/9ce9c184263d8a48ce0da26e70920650a6c95d84/firebase-firestore/src/main/java/com/google/firebase/firestore/core/FirestoreClient.java#L107-L108

Fatal Exception: java.lang.RuntimeException: Internal error in Cloud Firestore (21.1.1).
       at com.google.firebase.firestore.util.AsyncQueue.lambda$panic$3(AsyncQueue.java:529)
       at com.google.firebase.firestore.util.AsyncQueue$$Lambda$3.run(AsyncQueue.java:2)
       at android.os.Handler.handleCallback(Handler.java:790)
       at android.os.Handler.dispatchMessage(Handler.java:99)
       at android.os.Looper.loop(Looper.java:164)
       at android.app.ActivityThread.main(ActivityThread.java:7000)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:441)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1408)

Caused by java.lang.RuntimeException: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.google.firebase.firestore.i0.m0.a(com.google.firebase.firestore.h0.f)' on a null object reference
       at com.google.firebase.firestore.util.AsyncQueue$SynchronizedShutdownAwareExecutor.lambda$executeAndReportResult$1(AsyncQueue.java:320)
       at com.google.firebase.firestore.util.AsyncQueue$SynchronizedShutdownAwareExecutor$$Lambda$2.run(AsyncQueue.java:4)
       at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:457)
       at java.util.concurrent.FutureTask.run(FutureTask.java:266)
       at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:301)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
       at com.google.firebase.firestore.util.AsyncQueue$SynchronizedShutdownAwareExecutor$DelayedStartFactory.run(AsyncQueue.java:224)
       at java.lang.Thread.run(Thread.java:764)

Caused by java.lang.NullPointerException: Attempt to invoke virtual method 'void com.google.firebase.firestore.i0.m0.a(com.google.firebase.firestore.h0.f)' on a null object reference
       at com.google.firebase.firestore.core.FirestoreClient.lambda$new$0(FirestoreClient.java:105)
       at com.google.firebase.firestore.core.FirestoreClient$$Lambda$15.run(FirestoreClient.java:4)
       at com.google.firebase.firestore.util.AsyncQueue.lambda$enqueue$2(AsyncQueue.java:431)
       at com.google.firebase.firestore.util.AsyncQueue$$Lambda$2.call(AsyncQueue.java:2)
       at com.google.firebase.firestore.util.AsyncQueue$SynchronizedShutdownAwareExecutor.lambda$executeAndReportResult$1(AsyncQueue.java:317)
       at com.google.firebase.firestore.util.AsyncQueue$SynchronizedShutdownAwareExecutor$$Lambda$2.run(AsyncQueue.java:4)
       at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:457)
       at java.util.concurrent.FutureTask.run(FutureTask.java:266)
       at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:301)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
       at com.google.firebase.firestore.util.AsyncQueue$SynchronizedShutdownAwareExecutor$DelayedStartFactory.run(AsyncQueue.java:224)
       at java.lang.Thread.run(Thread.java:764)