ANR at android.os.MessageQueue.nativePollOnce

Question

We are seeing this ANR in different parts of our app. Wanted to understand what causes this ANR?

main (native): tid=1 systid=31940
#00 pc 0x5431c libc.so 
#01 pc 0x1313a5 libart.so 
#02 pc 0x2ab05b libart.so 
#03 pc 0x3659 libnativehelper.so 
#04 pc 0x9dee9 libandroid_runtime.so 
#05 pc 0x65c45 libgui.so 
#06 pc 0x11dcd libutils.so 
#07 pc 0x11abf libutils.so 
#08 pc 0xbcc7d libandroid_runtime.so 
       at android.os.MessageQueue.nativePollOnce(MessageQueue.java)
       at android.os.MessageQueue.next(MessageQueue.java:339)
       at android.os.Looper.loop(Looper.java:199)
       at android.app.ActivityThread.main(ActivityThread.java:8276)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:612)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1006)

This is what firebase has to say about this ANR -

This thread was idle when the ANR occurred. We don't have sufficient information to determine the root cause.

Happened yesterday with me too with Android 11 and various Devices including mainly Samsung and Motorola. — lubrum, Mar 23 '22 at 21:34
@HarminderSingh Do you have webviews in your app? We are experiencing this ANRs too and all of them are in webview. — Hype, Apr 08 '22 at 10:43
@HarminderSingh which @react-native-firebase/app version are you using? Did you try upgrading it? — Ayush Gupta, Apr 19 '22 at 06:58
Getting a lot of ANR only on Samsung Android 11 devices. It seems to be linked with Firebase versions, because it happened just after I upgraded Firebase-bom from 28.4.2 to 29.3.1. There was 0 ANR before that change. And all ANR stacktraces are unusable, it's happening randomly when using the app. — Skyle, May 05 '22 at 13:58
Looked into this a little, it looks like firebase only started reporting ANRs in [28.4.3](https://firebase.google.com/support/release-notes/android#crashlytics_v18-2-4) — waterPoweredMonkey, May 11 '22 at 03:35
I'm seeing it mostly in Android 12 (98%) and it's exclusively Asus devices, mostly ZenFone. — Dustin, May 13 '22 at 15:36
I find these ANRs in the Crashlytics of my flutter app as well. — Harsha, May 16 '22 at 06:26
i am also getting these anr , 91% android 11 and 9% on android 12. were you able to find any solution ? — Haris Ali, Jun 01 '22 at 17:55
@AyushGupta it's an android app. We not using react native in it — Harminder Singh, Jul 27 '22 at 11:44

Yaqoob Bhatti · Answer 1 · 2023-07-27T13:25:45.000

NativePollOnce:

It appears when the CPU is waiting for a new task/message.

Reasons:

ANR may occur if BroadCast Receiver hasn’t finished execution within 10 Seconds.
No response to an input event within 5 Seconds
ANR may be caused when the app tries to show a dialog by mistake but the call is not from the main thread. (Note: verify all calls of UI View from UI thread)
It may occur due to memory leaks.
Handler.postDelayed may create an issue
This type of crash is commonly seen, when the stack dump takes place, some app’s stack trace could be dumped for a long after the actual ANR time
It may occur on SCREEN_ON BROADCAST and google ads are using SCREEN_ON BROADCAST.
It may occur during the Garbage collection process (by
Ezequiel Adrian comment)

Ways to collect ANRs:

WatchDog
Catching Native SIGQUIT
ApplicationExitInfo (used by crashalytics)
Collect from Google Play Console
Firebase (firebase only collect from android 11 and above)

Challenges in Solving ANR:

Demystifying the ANRs Puzzle. Link

Solutions:

Optimize initialization and Ad Loading. Link
If you are using Media then release it in IO Thread
Find memory leaks to track down using a leak canary or Android profiler
Downgrade firebase to 28.4.2 (It will not collect ANR but it does not mean that it cannot occur)
Verify all calls of UI View from the UI thread
More Information from Issue Tracker
More Info Stack Ans

Please add to the ANR causes: Garbage collection process. – Ezequiel Adrian Jul 25 '23 at 03:21 — Ezequiel Adrian, Jul 25 '23 at 03:21

score 8 · Answer 2 · answered Aug 17 '22 at 06:33

8

Facing the same issue - I've read that it related to Admob or unity ads and there is an open thread for google : https://issuetracker.google.com/issues/230950647?pli=1

answered Aug 17 '22 at 06:33

Omer Eizenberg

81
1
5

score 3 · Answer 3 · edited Sep 22 '22 at 09:14

3

On the latest release of Cloud Messaging dependencies v23.0.7 Firebase Mention that this release might reduce the ANR. here is his words mentioned in its documentation.

Message broadcasts now finish immediately after binding to the service. This change should reduce the chance of ANRs

edited Sep 22 '22 at 09:14

jack

573
4
12

answered Sep 06 '22 at 09:22

Krishna Sony

1,286
13
27

4

Unfortunately we're still seeing ANRs with v23.0.7. – Eran Boudjnah Sep 06 '22 at 12:59

score 1 · Answer 4 · answered Dec 13 '22 at 09:56

1

In my case, it was an error in the firebase cloud messaging lib. The bug was fixed in the latest version 23.1.1, which was released on 12/8/2022.

https://firebase.google.com/support/release-notes/android#messaging_v23-1-1

Hope it helps you.

answered Dec 13 '22 at 09:56

Daniel Pína

348
2
7

3

Didn't work for me. Still getting ANRs – miq0717 Feb 19 '23 at 02:32

ANR at android.os.MessageQueue.nativePollOnce

4 Answers4

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