In Firebase-Runloop (3.0.0) wurde eine Ausnahme in Bezug auf Persistenz und Abfragen nicht berücksichtigt.
Ich habe schon eine Weile mit dieser Ausnahme zu kämpfen. Ein relevanter Thread in der Firebase-Gruppe ist irgendwie tothttps: //groups.google.com/forum/#! topic / firebase-talk / iy0762S3KsU, auch zwei verwandte auf SO sind unbeantwortet: Ausnahme in Firebase-Runloop (3.0.0) nicht abgefangen undUncaught-Ausnahme in Firebase-Runloop (3.0.0). Bitte melde dich bei support @ firebase.com
Die Problemumgehung, die besagt, dass die Datenbankpersistenz ausgeschaltet werden soll, funktioniert, ist jedoch für Apps, die Offline-Funktionen erfordern, nicht inakzeptabel.
Ich habe ein minimales Aktivitätsbeispiel vorbereitet, das die Ausnahme in meiner Umgebung reproduziert. Alles läuft darauf hinaus, die Datenbank mit Abfragen zu lesen. Es reicht aus, die Aktivität dreimal (seltsam) zu starten und zu beenden ("beenden"), und beim dritten Start stürzt sie mit den folgenden spektakulären Ausnahmeserien ab (je mehr Abfragen in der Warteschlange stehen, desto mehr Ausnahmen, denke ich) ):
07-05 18:47:10.132 20291-20291/com.mypackage D/ChimeraFileApk: Classloading successful. Optimized code found.
07-05 18:47:10.154 20291-20381/com.mypackage E/RunLoop: Uncaught exception in Firebase runloop (3.0.0). Please report to [email protected]
java.lang.AssertionError: hardAssert failed:
at com.google.android.gms.internal.zzaiv.zzb(Unknown Source)
at com.google.android.gms.internal.zzaiv.zzaN(Unknown Source)
at com.google.android.gms.internal.zzagh.zzb(Unknown Source)
at com.google.android.gms.internal.zzagh.<init>(Unknown Source)
at com.google.android.gms.internal.zzaga.<init>(Unknown Source)
at com.google.android.gms.internal.zzaga.<init>(Unknown Source)
at com.google.android.gms.internal.zzadp.zza(Unknown Source)
at com.google.android.gms.internal.zzaeu.zzic(Unknown Source)
, at com.google.android.gms.internal.zzafc.zzRy(Unknown Source)
at com.google.android.gms.internal.zzafc.zza(Unknown Source)
at com.google.android.gms.internal.zzafc$1.run(Unknown Source)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:423)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:269)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
at java.lang.Thread.run(Thread.java:818)
07-05 18:47:10.154 20291-20291/com.mypackage D/AndroidRuntime: Shutting down VM
07-05 18:47:10.155 20291-20291/com.mypackage E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.mypackage, PID: 20291
java.lang.RuntimeException: Uncaught exception in Firebase runloop (3.0.0). Please report to [email protected]
at com.google.android.gms.internal.zzadp$1$1.run(Unknown Source)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.AssertionError: hardAssert failed:
at com.google.android.gms.internal.zzaiv.zzb(Unknown Source)
at com.google.android.gms.internal.zzaiv.zzaN(Unknown Source)
at com.google.android.gms.internal.zzagh.zzb(Unknown Source)
at com.google.android.gms.internal.zzagh.<init>(Unknown Source)
at com.google.android.gms.internal.zzaga.<init>(Unknown Source)
at com.google.android.gms.internal.zzaga.<init>(Unknown Source)
at com.google.android.gms.internal.zzadp.zza(Unknown Source)
at com.google.android.gms.internal.zzaeu.zzic(Unknown Source)
at com.google.android.gms.internal.zzafc.zzRy(Unknown Source)
at com.google.android.gms.internal.zzafc.zza(Unknown Source)
at com.google.android.gms.internal.zzafc$1.run(Unknown Source)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:423)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:269)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
at java.lang.Thread.run(Thread.java:818)
07-05 18:47:10.165 20291-20381/com.mypackage E/RunLoop: Uncaught exception in Firebase runloop (3.0.0). Please report to [email protected]
java.lang.NullPointerException: Attempt to invoke virtual method 'java.util.List com.google.android.gms.internal.zzafj.zzg(com.google.android.gms.internal.zzaew)' on a null object reference
at com.google.android.gms.internal.zzafc.zzf(Unknown Source)
at com.google.firebase.database.Query$3.run(Unknown Source)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:423)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:269)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
at java.lang.Thread.run(Thread.java:818)
07-05 18:47:10.166 20291-20381/com.mypackage E/RunLoop: Uncaught exception in Firebase runloop (3.0.0). Please report to [email protected]
java.lang.NullPointerException: Attempt to invoke virtual method 'java.util.List com.google.android.gms.internal.zzafj.zzg(com.google.android.gms.internal.zzaew)' on a null object reference
at com.google.android.gms.internal.zzafc.zzf(Unknown Source)
at com.google.firebase.database.Query$3.run(Unknown Source)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:423)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:269)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
at java.lang.Thread.run(Thread.java:818)
07-05 18:47:10.173 20291-20381/com.mypackage E/RunLoop: Uncaught exception in Firebase runloop (3.0.0). Please report to [email protected]
java.lang.NullPointerException: Attempt to invoke virtual method 'void com.google.android.gms.internal.zzafg.zzg(com.google.android.gms.internal.zzafa, com.google.android.gms.internal.zzahu)' on a null object reference
at com.google.android.gms.internal.zzafc.zzb(Unknown Source)
at com.google.android.gms.internal.zzafc.zza(Unknown Source)
at com.google.android.gms.internal.zzafc.zzaO(Unknown Source)
at com.google.firebase.database.connection.idl.IPersistentConnectionImpl$3.zzaO(Unknown Source)
at com.google.firebase.database.connection.idl.zzi$zza.onTransact(Unknown Source)
at android.os.Binder.transact(Binder.java:387)
at alx.a(:com.google.android.gms.DynamiteModulesC:196)
at amb.a(:com.google.android.gms.DynamiteModulesC:330)
at akh.a(:com.google.android.gms.DynamiteModulesC:3591)
at amf.a(:com.google.android.gms.DynamiteModulesC:386)
at aln.onTransact(:com.google.android.gms.DynamiteModulesC:50)
at android.os.Binder.transact(Binder.java:387)
at com.google.firebase.database.connection.idl.zzf$zza$zza.zzhT(Unknown Source)
at com.google.firebase.database.connection.idl.IPersistentConnectionImpl$5$1.zzhT(Unknown Source)
at com.google.android.gms.internal.zzaeu$1$1.zzhT(Unknown Source)
at com.google.android.gms.internal.zzadn$1.onFailure(Unknown Source)
at com.google.android.gms.tasks.zzd$1.run(Unknown Source)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:423)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:269)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
at java.lang.Thread.run(Thread.java:818)
07-05 18:47:11.745 20291-20291/com.mypackage I/Process: Sending signal. PID: 20291 SIG: 9
Der Absturz tritt beim ersten Leseversuch auf, nachdem der Verweis auf die Datenbank abgerufen und die Persistenz festgelegt wurde.
Hier ist die Aktivität:
public class TestRunloopException extends AppCompatActivity {
private static final String TAG = "test";
private Handler mHandler = new Handler();
Runnable mReadScoresRunnable = new Runnable() {
@Override
public void run() {
readScores();
mHandler.postDelayed(mReadScoresRunnable, 5000);
}
};
@Override
protected void onStart() {
super.onStart();
mHandler.postDelayed(mReadScoresRunnable, 3000);
}
void readScores() {
DatabaseReference scoresRef = getDatabase().getReference("scores");
//it occurs even with a single query..
//scoresRef.startAt(51).limitToFirst(3).addListenerForSingleValueEvent(new MyValueListener());
scoresRef.endAt(50).limitToLast(4).addListenerForSingleValueEvent(new MyValueListener());
}
public static class MyValueListener implements ValueEventListener {
@Override
public void onDataChange(DataSnapshot data) {
Log.d(TAG, "onDataChange: " + data.getValue());
}
@Override
public void onCancelled(DatabaseError error) {
Log.d(TAG, "onCancelled: " + error.getMessage());
}
}
// access-wrapper, set persistence only once
private static FirebaseDatabase mDatabase;
public static FirebaseDatabase getDatabase() {
if (mDatabase == null) {
mDatabase = FirebaseDatabase.getInstance();
mDatabase.setPersistenceEnabled(true);
}
return mDatabase;
}
}
Der Knoten "Scores" hat keine besonderen Sicherheitseinstellungen:"scores": { ".read": true, ".write": true } ...
Getestet mit firebase - *: 9.0.2, aber der Fehler wurde auch mit 9.2.0 beobachtet.
Wie vermeide ich den Absturz, wenn ich mehrere Abfragen auf demselben Verweis / Knoten verwende und natürlich eine Persistenz habe?