Repository navigation
Android ANRs in Flutter 3.32.1 #170196
Description
Steps to reproduce
Firebase Crashlytics and Google Play reported that I am getting a lot of ANR's. It was much more higher in v3.29.0 and after upgrade I am continuing to get ANR's. Following ANR's happened on Flutter v3.32.1. App used more then 100k devices so I have wide range of device and chipsets.
Expected results
Working without ANRs
Actual results
Getting ANR's around %1.3 which is way above Google Play ANR bad behaviour threshold (%0.47). This may cause the apps written in Flutter will be much less visible according to Google Play.
And I look it up. It is not just my app a lot of Flutter devs facing same issue/issues.
Code sample
I don't think it is about my code because ANR's happens mostly same device, chipsets etc.
Screenshots or Video
Google Play ANRs
Logs
Logs
ANR 1: android.os.MessageQueue.nativePollOnce - Root cause for this ANR is unknown
As far as I can see this error happens on "Transsion" devices mostly.
main (native):tid=1 systid=8185
#00 pc 0x88e1c libc.so (syscall + 28) (BuildId: 21cd09af0ad2ccf35d6b8ba2d064b3c4)
#01 pc 0x22a29c libart.so (art::ConditionVariable::WaitHoldingLocks + 136) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
#02 pc 0x73c008 libart.so (art::JNI<false>::FindClass + 1580) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
#03 pc 0x127a1c libandroid_runtime.so (android::NativeDisplayEventReceiver::dispatchVsync + 92) (BuildId: 6d76667b78a11a4ca53e8e1d62a49516)
#04 pc 0xb7b34 libgui.so (android::DisplayEventDispatcher::handleEvent + 276) (BuildId: 60bcf7a3168cc57bdd0bb228e86a9621)
#05 pc 0x18224 libutils.so (android::Looper::pollInner + 1060) (BuildId: 10aac5d4a671e4110bc00c9b69d83d8a)
#06 pc 0x17da0 libutils.so (android::Looper::pollOnce + 112) (BuildId: 10aac5d4a671e4110bc00c9b69d83d8a)
#07 pc 0x162cdc libandroid_runtime.so (android::android_os_MessageQueue_nativePollOnce + 44) (BuildId: 6d76667b78a11a4ca53e8e1d62a49516)
at android.os.MessageQueue.nativePollOnce(Native method)
at android.os.MessageQueue.next(MessageQueue.java:335)
at android.os.Looper.loopOnce(Looper.java:161)
at android.os.Looper.loop(Looper.java:288)
at android.app.ActivityThread.main(ActivityThread.java:8115)
at java.lang.reflect.Method.invoke(Native method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:703)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:911)
ANR 2: android.os.MessageQueue.nativePollOnce - Root cause for this ANR is unknown
This error look like ANR1 but crashlytics says it is different and happen different devices.
main (native):tid=1 systid=7666
#00 pc 0x91380 libc.so (syscall + 32) (BuildId: 1e3ca19bcae05c01b019c85f3f422e56)
#01 pc 0x22a29c libart.so (art::ConditionVariable::WaitHoldingLocks + 136) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
#02 pc 0x993b28 libart.so (artJniMethodEnd + 344) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
#03 pc 0x787a3c libart.so (art_jni_method_end + 12) (BuildId: 4ccb65ae9ac5ad5da3af5a342d5b0b92)
at android.os.MessageQueue.nativePollOnce(Native method)
at android.os.MessageQueue.next(MessageQueue.java:341)
at android.os.Looper.loopOnce(Looper.java:176)
at android.os.Looper.loop(Looper.java:318)
at android.app.ActivityThread.main(ActivityThread.java:8727)
at java.lang.reflect.Method.invoke(Native method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:561)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1013)
ANR 3: android.os.MessageQueue.nativePollOnce - Root cause for this ANR is unknown
Again different bug. Happen in different devices.
main (native):tid=1 systid=25660
#00 pc 0x4170e6 split_config.armeabi_v7a.apk!libflutter.so + 11452416
#01 pc 0x61fe [anon:libc_malloc]
at android.os.MessageQueue.nativePollOnce(Native method)
at android.os.MessageQueue.next(MessageQueue.java:335)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:8097)
at java.lang.reflect.Method.invoke(Native method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:620)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1011)
Flutter Doctor output
Doctor output
[√] Flutter (Channel stable, 3.32.1, on Microsoft Windows [Version 10.0.26100.4061], locale en-US) [426ms]
• Flutter version 3.32.1 on channel stable at C:\FlutterSDK
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision b25305a883 (9 days ago), 2025-05-29 10:40:06 -0700
• Engine revision 1425e5e9ec
• Dart version 3.8.1
• DevTools version 2.45.1
[√] Windows Version (11 Pro 64-bit, 24H2, 2009) [1,511ms]
[√] Android toolchain - develop for Android devices (Android SDK version 36.0.0) [2.2s]
• Android SDK at C:\AndroidSDK
• Platform android-36, build-tools 36.0.0
• ANDROID_HOME = C:\AndroidSDK
• ANDROID_SDK_ROOT = C:\AndroidSDK
• Java binary at: C:\Program Files\Android\Android Studio\jbr\bin\java
This is the JDK bundled with the latest Android Studio installation on this machine.
To manually set the JDK path, use: `flutter config --jdk-dir="path/to/jdk"`.
• Java version OpenJDK Runtime Environment (build 21.0.6+-13368085-b895.109)
• All Android licenses accepted.
[√] Chrome - develop for the web [94ms]
• Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe
[√] Visual Studio - develop Windows apps (Visual Studio Community 2022 17.9.0) [93ms]
• Visual Studio at C:\Program Files\Microsoft Visual Studio\2022\Community
• Visual Studio Community 2022 version 17.9.34607.119
• Windows 10 SDK version 10.0.22621.0
[√] Android Studio (version 2024.3.2) [27ms]
• Android Studio at C:\Program Files\Android\Android Studio
• Flutter plugin can be installed from:
https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
https://plugins.jetbrains.com/plugin/6351-dart
• android-studio-dir = C:\Program Files\Android\Android Studio
• Java version OpenJDK Runtime Environment (build 21.0.6+-13368085-b895.109)
[√] VS Code (version 1.86.0) [25ms]
• VS Code at C:\Users\USERNAME\AppData\Local\Programs\Microsoft VS Code
• Flutter extension can be installed from:
https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter
[√] Connected device (4 available) [363ms]
• OMIX X500 (mobile) • X500S22053067 • android-arm64 • Android 11 (API 30)
• Windows (desktop) • windows • windows-x64 • Microsoft Windows [Version 10.0.26100.4061]
• Chrome (web) • chrome • web-javascript • Google Chrome 137.0.7151.69
• Edge (web) • edge • web-javascript • Microsoft Edge 136.0.3240.92
[√] Network resources [439ms]
• All expected network resources are available.
• No issues found!Reacted by Tommy and BenjaminStoeberl
Activity
[-]Android ANRs in 3.32.1[/-][+]Android ANRs in Flutter 3.32.1[/+]aykutuludag commentedon Jun 7, 2025
A sample full stack trace from Google Play:
Device name: Itel itel A50
Android version: Android 14 (SDK 34)
aykutuludag commentedon Jun 7, 2025
Another Google Play full stack trace:
Device name: POCO POCO M6
Android version: Android 14 (SDK 34)
aykutuludag commentedon Jun 7, 2025
According to my research, ANRs happen on mostly MediaTek chipset phones. I look it up what happen in v3.32.0 and I discovered that there is and change on Vulkan / Open GLES technology. Here is the details: https://medium.com/flutter/whats-new-in-flutter-3-32-40c1086bab6e?utm_source=chatgpt.com
I can't say it is %100 because of that because I was getting ANRs in v3.29.0 too but it is something we should check I guess.
tirth-patel-nc commentedon Jun 9, 2025
this looks similar to #169906. can you follow the steps mentioned there and symbolize the libapp.so frames using the symbols available in your build?
also, try to include everything in one comment to keep the thread less noisy.
github-actions commentedon Jun 30, 2025
Without additional information, we are unfortunately not sure how to resolve this issue. We are therefore reluctantly going to close this bug for now.
If you find this problem please file a new issue with the same description, what happens, logs and the output of 'flutter doctor -v'. All system setups can be slightly different so it's always better to open new issues and reference the related ones.
Thanks for your contribution.
github-actions commentedon Jul 14, 2025
This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of
flutter doctor -vand a minimal reproduction of the issue.