Intermittent splash screen hang on Android #286
Description
Environment
How do you use Sentry?
Sentry SaaS (sentry.io)
Which SDK and version?
Sentry Unity 0.4.3 (https://github.com/getsentry/unity.git#0.4.3 via UPM)
Steps to Reproduce
- Add Sentry to the project and enter the DSN
- Build an Android APK
- Run the Android app
Result
When running the built Android app, sometimes it will work, but roughly 1 in 10 starts of the app will hang indefinitely on the splash screen. This was a baffling issue, and it is resolved by removing sentry-unity from the project.
Looking at adb logcat for one of the hangs, it seems to print this:
08-20 17:17:07.104 27021 27036 I zygote : Rejecting re-init on previously-failed class java.lang.Class<com.unity3d.player.AssetPackManagerWrapper$b>: java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/android/play/core/assetpacks/AssetPackStateUpdateListener;
08-20 17:17:07.104 27021 27036 I zygote : at boolean com.unity3d.player.UnityPlayer.nativeRender() ((null):-2)
08-20 17:17:07.104 27021 27036 I zygote : at boolean com.unity3d.player.UnityPlayer.access$300(com.unity3d.player.UnityPlayer) ((null):-1)
08-20 17:17:07.104 27021 27036 I zygote : at boolean com.unity3d.player.UnityPlayer$e$1.handleMessage(android.os.Message) ((null):-1)
08-20 17:17:07.104 27021 27036 I zygote : at void android.os.Handler.dispatchMessage(android.os.Message) (Handler.java:102)
08-20 17:17:07.104 27021 27036 I zygote : at void android.os.Looper.loop() (Looper.java:164)
08-20 17:17:07.104 27021 27036 I zygote : at void com.unity3d.player.UnityPlayer$e.run() ((null):-1)
08-20 17:17:07.104 27021 27036 I zygote : Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.android.play.core.assetpacks.AssetPackStateUpdateListener" on path: DexPathList[[zip file "/data/app/me.overflo.mygame-Jtekv7VX5bBOly1L6sqzfA==/base.apk"],nativeLibraryDirectories=[/data/app/me.overflo.mygame-Jtekv7VX5bBOly1L6sqzfA==/lib/arm, /data/app/me.overflo.mygame-Jtekv7VX5bBOly1L6sqzfA==/base.apk!/lib/armeabi-v7a, /system/lib, /system/vendor/lib]]
08-20 17:17:07.104 27021 27036 I zygote : at java.lang.Class dalvik.system.BaseDexClassLoader.findClass(java.lang.String) (BaseDexClassLoader.java:125)
08-20 17:17:07.104 27021 27036 I zygote : at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String, boolean) (ClassLoader.java:379)
08-20 17:17:07.104 27021 27036 I zygote : at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String) (ClassLoader.java:312)
08-20 17:17:07.104 27021 27036 I zygote : at boolean com.unity3d.player.UnityPlayer.nativeRender() ((null):-2)
08-20 17:17:07.104 27021 27036 I zygote : at boolean com.unity3d.player.UnityPlayer.access$300(com.unity3d.player.UnityPlayer) ((null):-1)
08-20 17:17:07.104 27021 27036 I zygote : at boolean com.unity3d.player.UnityPlayer$e$1.handleMessage(android.os.Message) ((null):-1)
08-20 17:17:07.104 27021 27036 I zygote : at void android.os.Handler.dispatchMessage(android.os.Message) (Handler.java:102)
08-20 17:17:07.104 27021 27036 I zygote : at void android.os.Looper.loop() (Looper.java:164)
08-20 17:17:07.104 27021 27036 I zygote : at void com.unity3d.player.UnityPlayer$e.run() ((null):-1)
I wasn't able to make much sense of that, but it does seem to only be printed on the launches that hang. No logs are printed from my C# code on these launches, implying that it hasn't started to properly load the game yet.
The issue is not reproducible on iOS or PC. There isn't a consistent gap between launches that hang - sometimes they're only 1 or 2 apart, sometimes you can go for 10 or more without seeing anything go wrong. I had to sit and open and close the app over and over haha
Potentially useful info
Unity version - 2021.1.17f1
Scripting Backend - IL2CPP
API Compatibility Level - .NET Standard 2.0
C++ Compiler Configuration - Master
Please do let me know if there's any other info that would be helpful for debugging this issue - I'd love to be able to use Sentry in my project.
I might come back and attach a reproducible example project if I have the time this weekend.