ANR com.google.firebase.iid.FirebaseInstanceIdReceiver

[belrvn]

We are seeing a lot of ANRs :

#00 pc 000000000013e5a6 /system/lib/libart.so (art::DexFile::FindClassDef(art::dex::TypeIndex) const+33)
#00 pc 0000000000150aad /system/lib/libart.so (art::DexFileVerifier::CheckInterClassDefItem()+964)
#00 pc 0000000000151bc3 /system/lib/libart.so (art::DexFileVerifier::CheckInterSectionIterate(unsigned int, unsigned int, art::DexFile::MapItemType)+366)
#00 pc 000000000014a611 /system/lib/libart.so (art::DexFileVerifier::Verify()+132)
#00 pc 000000000014a4a1 /system/lib/libart.so (art::DexFileVerifier::Verify(art::DexFile const*, unsigned char const*, unsigned int, char const*, bool, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator>)+120)
#00 pc 000000000013d871 /system/lib/libart.so (art::DexFile::OpenOneDexFileFromZip(art::ZipArchive const&, char const, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator> const&, bool, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator>, art::DexFile::ZipOpenErrorCode)+616)
#00 pc 000000000013d38d /system/lib/libart.so (art::DexFile::OpenAllDexFilesFromZip(art::ZipArchive const&, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator> const&, bool, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator>, std::__1::vector<std::__1::unique_ptr<art::DexFile const, std::__1::default_delete<art::DexFile const>>, std::__1::allocator<std::__1::unique_ptr<art::DexFile const, std::__1::default_delete<art::DexFile const>>>>)+440)
#00 pc 000000000013cfdd /system/lib/libart.so (art::DexFile::OpenZip(int, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator> const&, bool, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator>, std::__1::vector<std::__1::unique_ptr<art::DexFile const, std::__1::default_delete<art::DexFile const>>, std::__1::allocator<std::__1::unique_ptr<art::DexFile const, std::__1::default_delete<art::DexFile const>>>>)+276)
#00 pc 000000000013cda9 /system/lib/libart.so (art::DexFile::Open(char const*, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator> const&, bool, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator>, std::__1::vector<std::__1::unique_ptr<art::DexFile const, std::__1::default_delete<art::DexFile const>>, std::__1::allocator<std::__1::unique_ptr<art::DexFile const, std::__1::default_delete<art::DexFile const>>>>)+376)
#00 pc 000000000031e7c3 /system/lib/libart.so (art::OatFileManager::OpenDexFilesFromOat(char const*, _jobject*, _jobjectArray*, art::OatFile const**, std::__1::vector<std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator>, std::__1::allocator<std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator>>>)+3890)
#00 pc 00000000002ed9b9 /system/lib/libart.so (art::DexFile_openDexFileNative(_JNIEnv, _jclass*, _jstring*, _jstring*, int, _jobject*, _jobjectArray*)+96)
#00 pc 00000000000519fb /system/framework/arm/boot-core-libart.oat (Java_dalvik_system_DexFile_openDexFileNative__Ljava_lang_String_2Ljava_lang_String_2ILjava_lang_ClassLoader_2_3Ldalvik_system_DexPathList_00024Element_2+194)
at dalvik.system.DexFile.openDexFileNative (DexFile.java)
at dalvik.system.DexFile.openDexFile (DexFile.java:353)
at dalvik.system.DexFile. (DexFile.java:100)
at dalvik.system.DexFile. (DexFile.java:74)
at dalvik.system.DexPathList.loadDexFile (DexPathList.java:374)
at dalvik.system.DexPathList.makeDexElements (DexPathList.java:337)
at dalvik.system.DexPathList. (DexPathList.java:157)
at dalvik.system.BaseDexClassLoader. (BaseDexClassLoader.java:65)
at dalvik.system.PathClassLoader. (PathClassLoader.java:64)
at com.android.internal.os.ClassLoaderFactory.createClassLoader (ClassLoaderFactory.java:73)
at com.android.internal.os.ClassLoaderFactory.createClassLoader (ClassLoaderFactory.java:88)
at android.app.ApplicationLoaders.getClassLoader (ApplicationLoaders.java:69)
at android.app.ApplicationLoaders.getClassLoader (ApplicationLoaders.java:35)
at android.app.LoadedApk.createOrUpdateClassLoaderLocked (LoadedApk.java:693)
at android.app.LoadedApk.getClassLoader (LoadedApk.java:727)
at android.app.ContextImpl.getClassLoader (ContextImpl.java:300)
at android.webkit.WebViewFactory.getProviderClass (WebViewFactory.java:394)
at android.webkit.WebViewFactory.getProvider (WebViewFactory.java:194)
at android.webkit.WebView.getFactory (WebView.java:2530)
at android.webkit.WebView.ensureProviderCreated (WebView.java:2525)
at android.webkit.WebView.setOverScrollMode (WebView.java:2590)
at android.view.View. (View.java:4574)
at android.view.View. (View.java:4706)
at android.view.ViewGroup. (ViewGroup.java:597)
at android.widget.AbsoluteLayout. (AbsoluteLayout.java:55)
at android.webkit.WebView. (WebView.java:643)
at android.webkit.WebView. (WebView.java:588)
at android.webkit.WebView. (WebView.java:571)
at android.webkit.WebView. (WebView.java:558)
at android.webkit.WebView. (WebView.java:548)
at com.audienceproject.userreport.InAppEventsTrack.getUserAgentString (InAppEventsTrack.java:221)
at com.audienceproject.userreport.InAppEventsTrack. (InAppEventsTrack.java:64)
at com.audienceproject.userreport.UserReport.initTracker (UserReport.java:130)
at com.audienceproject.userreport.UserReport.init (UserReport.java:94)
at com.audienceproject.userreport.UserReport. (UserReport.java:56)
at com.audienceproject.userreport.UserReport.configure (UserReport.java:67)
at com.audienceproject.userreport.UserReport.configure (UserReport.java:81)
at fi.iltalehti.nyt.IlApp.initUserReport (IlApp.java:107)
at fi.iltalehti.nyt.IlApp.onCreate (IlApp.java:51)
at android.app.Instrumentation.callApplicationOnCreate (Instrumentation.java:1120)
at android.app.ActivityThread.handleBindApplication (ActivityThread.java:5763)
at android.app.ActivityThread.-wrap1 (ActivityThread.java)
at android.app.ActivityThread$H.handleMessage (ActivityThread.java:1659)
at android.os.Handler.dispatchMessage (Handler.java:106)
at android.os.Looper.loop (Looper.java:164)
at android.app.ActivityThread.main (ActivityThread.java:6526)
at java.lang.reflect.Method.invoke (Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:807)

This row made me to publish it here at com.audienceproject.userreport.InAppEventsTrack.getUserAgentString (InAppEventsTrack.java:221)

[hmvs]

Thank you for the report. Are there any additional details? Like the device, android version.

[belrvn]

This ANR is mainly an issue on firebase side: firebase/firebase-android-sdk#2014

But it happens on :
Android 8.1 (SDK 27)
Android 9 (SDK 28)
Android 7.0 (SDK 24)
Android 8.0 (SDK 26)

Devices affected by this ANR :
Lenovo Tab E10 43.1%
Samsung Galaxy Tab A 10.1 17.4%
Nokia 3. 16.5%

[hmvs]

Thank you @Belka1000867.
Do you have any ideas on how we can fix it?

[belrvn]

I think that should be fixed in Firebase library. I see other same type ANRs from firebase.iid

[hmvs]

Ok. In this case, can you link to the issue in their repository?
The only workaround I thought of is to create WebView, not in the main thread. Though, I am not sure, is it worth doing? What do you think?

private void setUserAgent(Context context) {
    AsyncTask<Context, Void, Void> task = new AsyncTask<Context, Void, Void>() {
        @Override
        protected Void doInBackground(Context... contexts) {
            try {
                new Handler(Looper.getMainLooper()).post(() ->
                        defaultUserAgent = new WebView(context).getSettings().getUserAgentString());
            } catch (Exception ex) {
                ex.printStackTrace();
                return null; // exception might appear if there is no google APIs
            }
            return null;
        }
    };
    task.execute(context);
}

[hmvs]

@Belka1000867 So you've found the root cause in the firebase library. I guess we can close this one. Right?