[BUG] Fatal Exception: java.lang.IllegalArgumentException: ... does not encode a valid TensorFlow Lite model: Could not open .... The model allocation is null/empty

[jamesbluecrow]

Summary

We are seeing some our app crashing sometimes (not many) with the exception below.

Fatal Exception: java.lang.IllegalArgumentException: Contents of /data/user/0/com.package/cache/a8bcf0129dcd29084f6797ede7e0be86f9e11ed5.tflite does not encode a valid TensorFlow Lite model: Could not open '/data/user/0/com.package/cache/a8bcf0129dcd29084f6797ede7e0be86f9e11ed5.tflite'.
The model allocation is null/empty
       at org.tensorflow.lite.NativeInterpreterWrapper.createModel(NativeInterpreterWrapper.java)
       at org.tensorflow.lite.NativeInterpreterWrapper.<init>(NativeInterpreterWrapper.java:57)
       at org.tensorflow.lite.Interpreter.<init>(Interpreter.java:197)
       at com.stripe.android.mlcore.impl.InterpreterWrapperImpl.<init>(InterpreterWrapperImpl.kt:11)
       at com.stripe.android.identity.ml.FaceDetectorAnalyzer.<init>(FaceDetectorAnalyzer.kt:29)
       at com.stripe.android.identity.ml.FaceDetectorAnalyzer$Factory.newInstance(FaceDetectorAnalyzer.kt:98)
       at com.stripe.android.camera.framework.AnalyzerPool$Companion.of(Analyzer.kt:45)
       at com.stripe.android.camera.framework.AnalyzerPool$Companion.of$default(AnalyzerPool.java:39)
       at com.stripe.android.identity.camera.IdentityScanFlow$startFlow$1.invokeSuspend(IdentityScanFlow.kt:95)
       at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
       at kotlinx.coroutines.internal.DispatchedContinuationKt.resumeCancellableWith(DispatchedContinuation.kt:367)
       at kotlinx.coroutines.intrinsics.CancellableKt.startCoroutineCancellable(Cancellable.kt:30)
       at kotlinx.coroutines.intrinsics.CancellableKt.startCoroutineCancellable$default(Cancellable.kt:25)
       at kotlinx.coroutines.CoroutineStart.invoke(CoroutineStart.java:110)
       at kotlinx.coroutines.AbstractCoroutine.start(AbstractCoroutine.kt:126)
       at kotlinx.coroutines.BuildersKt__Builders_commonKt.launch(BuildersKt__Builders_common.kt:56)
       at kotlinx.coroutines.BuildersKt.launch(Builders.kt:1)
       at kotlinx.coroutines.BuildersKt__Builders_commonKt.launch$default(BuildersKt__Builders_common.kt:47)
       at kotlinx.coroutines.BuildersKt.launch$default(Builders.kt:1)
       at com.stripe.android.identity.camera.IdentityScanFlow.startFlow(IdentityScanFlow.kt:82)
       at com.stripe.android.identity.viewmodel.IdentityScanViewModel.startScan(IdentityScanViewModel.java:48)
       at com.stripe.android.identity.utils.CameraUtilsKt.startScanning(CameraUtils.kt:16)
       at com.stripe.android.identity.ui.SelfieScreenKt$SelfieScanScreen$2$3.invoke(SelfieScreen.kt:202)
       at com.stripe.android.identity.ui.SelfieScreenKt$SelfieScanScreen$2$3.invoke(SelfieScreen.kt:195)
       at com.stripe.android.identity.ui.CameraScreenLaunchedEffectKt$CameraScreenLaunchedEffect$1$1.invoke(CameraScreenLaunchedEffect.kt:57)
       at com.stripe.android.identity.ui.CameraScreenLaunchedEffectKt$CameraScreenLaunchedEffect$1$1.invoke(CameraScreenLaunchedEffect.kt:47)
       at com.stripe.android.identity.ui.CameraScreenLaunchedEffectKt$sam$androidx_lifecycle_Observer$0.onChanged(CameraScreenLaunchedEffect.kt:13)
       at androidx.lifecycle.LiveData.considerNotify(LiveData.java:133)
       at androidx.lifecycle.LiveData.dispatchingValue(LiveData.java:146)
       at androidx.lifecycle.LiveData$ObserverWrapper.activeStateChanged(LiveData.java:483)
       at androidx.lifecycle.LiveData$LifecycleBoundObserver.onStateChanged(LiveData.java:440)
       at androidx.lifecycle.LifecycleRegistry$ObserverWithState.dispatchEvent(LifecycleRegistry.kt:314)
       at androidx.lifecycle.LifecycleRegistry.addObserver(LifecycleRegistry.kt:192)
       at androidx.lifecycle.LiveData.observe(LiveData.java:205)
       at com.stripe.android.identity.ui.CameraScreenLaunchedEffectKt$CameraScreenLaunchedEffect$1.invokeSuspend(CameraScreenLaunchedEffect.kt:47)
       at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
       at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
       at androidx.compose.ui.platform.AndroidUiDispatcher.performTrampolineDispatch(AndroidUiDispatcher.android.kt:81)
       at androidx.compose.ui.platform.AndroidUiDispatcher.access$performTrampolineDispatch(AndroidUiDispatcher.android.kt:41)
       at androidx.compose.ui.platform.AndroidUiDispatcher$dispatchCallback$1.run(AndroidUiDispatcher.android.kt:57)
       at android.os.Handler.handleCallback(Handler.java:942)
       at android.os.Handler.dispatchMessage(Handler.java:99)
       at android.os.Looper.loopOnce(Looper.java:226)
       at android.os.Looper.loop(Looper.java:313)
       at android.app.ActivityThread.main(ActivityThread.java:8757)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:571)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1067)

Code to reproduce

No repro steps available. It has happened only to a few users.

Android version

Android 12 & 13

Impacted devices

• Samsung Galaxy A03s
• Oppo CPH2211

Installation method

Through a gradle dependency

Dependency Versions

kotlin: 1.9.0
stripe-android: 20.31.0
Android Gradle Plugin: 8.1.1
Gradle: 8.3

[tillh-stripe]

@ccen-stripe, can you help out here?

[ccen-stripe]

hi @jamesbluecrow the .tflite model is downloaded on the fly, from the log it seems that the file is not correctly downloaded. Is it possible to confirm when the error happens network connection is not stable and the model fails to download?

[jamesbluecrow]

IllegalArgumentException

Yes it is likely due to slow internet connection.

But in no case should the app crash because of it. The SDK should catch that exception if it cannot load the model and maybe emit a IdentityVerificationSheet.VerificationFlowResult.Failed error.

Because it is happening inside the SDK we cannot catch that exception ourselves.

[ccen-stripe]

IllegalArgumentException

Yes it is likely due to slow internet connection.

But in no case should the app crash because of it. The SDK should catch that exception if it cannot load the model and maybe emit a IdentityVerificationSheet.VerificationFlowResult.Failed error.

Because it is happening inside the SDK we cannot catch that exception ourselves.

Will fix this in our upcoming release!