[Firestore] Could not reach Cloud Firestore backend over Wifi on physical device.

[mlemos]

Describe the bug
When trying to get a document from Firestore, if the device is connected through Wifi the connection fails with the following error message:

W/Firestore( 4903): (21.4.3) [OnlineStateTracker]: Could not reach Cloud Firestore backend. Backend didn't respond within 10 seconds
W/Firestore( 4903): This typically indicates that your device does not have a healthy Internet connection at the moment. The client will operate in offline mode until it is able to successfully connect to the backend.

To Reproduce

Usually, the error happens when running in a Physical device.
I created a small app to be able to reproduce the errors with minimal interference from the rest my code. See the code below.

When you hit run on the debugger (I'm using VSCode) and then I click on the (+) button to make the request to Firestore, it stays trying for a few seconds (you'll see the progress indicator no the test app) and then the call snapshot = await docRef.get() fails with the following error message:

PlatformException(Error performing get, Failed to get document because the client is offline., null)

Then, if you turn the wifi off, the request works perfectly. And the content of the document retrieved from Firestore is present in the screen:

Now if you turn the wifi again, the request works. Sometimes the data is retrieved from the server and other from the cache.

import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Firestore Network Bug',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  bool _loading = false;
  Map<String, dynamic> _firebaseDocument;
  String _firebaseError;
  String _source;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Firestore Network Bug"),
      ),
      body: Padding(
        padding: const EdgeInsets.all(24),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.start,
          children: <Widget>[
            Text('Tap the (+) button to try to read from Firestore...',
                style: TextStyle(fontSize: 20)),
            _showProgress(),
            _showResults(),
            _showErrors(),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _readFromFirebase,
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }

  Widget _showProgress() {
    return Padding(
      padding: const EdgeInsets.only(top: 12.0),
      child: Container(
        height: 6.0,
        child: (_loading) ? LinearProgressIndicator() : Container(),
      ),
    );
  }

  Widget _showResults() {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        SizedBox(height: 12.0),
        Text("Result:"),
        Container(
          height: 150,
          padding: const EdgeInsets.all(16),
          color: Colors.blue[100],
          child: (_firebaseDocument != null)
              ? Text("From $_source: \n\n" + _firebaseDocument?.toString(),
                  style: TextStyle(fontSize: 16))
              : Container(),
        ),
      ],
    );
  }

  Widget _showErrors() {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        SizedBox(height: 12.0),
        Text("Errors:"),
        Container(
          height: 150,
          padding: const EdgeInsets.all(16),
          color: Colors.red[100],
          child: (_firebaseError != null)
              ? Text(_firebaseError?.toString(), style: TextStyle(fontSize: 16))
              : Container(),
        ),
      ],
    );
  }

  void _readFromFirebase() async {
    setState(() {
      _loading = true;
      _firebaseDocument = null;
      _firebaseError = null;
    });
    DocumentReference docRef =
        Firestore.instance.document("myCollection/myDocument");

    DocumentSnapshot snapshot = await docRef.get().catchError(
      (onError) {
        setState(() {
          _loading = false;
          _firebaseDocument = null;
          _firebaseError = onError.toString();
        });
      },
    );
    if (_firebaseError != null) return;

    _source = (snapshot.metadata.isFromCache) ? "cache" : "server";

    if (snapshot.exists) {
      setState(() {
        _loading = false;
        _firebaseDocument = snapshot.data;
      });
      print("Document found!");
      print("- ${_firebaseDocument.toString()}");
    } else {
      print("Document not found!");
    }
  }
}

Expected behavior
Since the device has perfect connectivity over wifi, it was excepted that the request worked fine and the document was retrieved from the server.

Additional context
On the emulator, everything works perfectly.
I tested in the following emulator configurations: Pixel 4 API 29, Pixel 5 API 25, Pixel 3 API 29.

The physical devices I used to test (both failed identically) where: Pixel 4XL (Android 10 QQ3Q.200605.001) and Pixel 3XL (Android 10 QQ2A.200305.002).

Flutter doctor

[✓] Flutter (Channel stable, v1.17.3, on Mac OS X 10.15.4 19E287, locale en-US)
    • Flutter version 1.17.3 at /Users/mlemos/Documents/flutter
    • Framework revision b041144f83 (8 days ago), 2020-06-04 09:26:11 -0700
    • Engine revision ee76268252
    • Dart version 2.8.4

 
[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
    • Android SDK at /Users/mlemos/Library/Android/sdk
    • Platform android-30, build-tools 29.0.2
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 11.5)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 11.5, Build version 11E608c
    • CocoaPods version 1.9.1

[!] Android Studio (version 4.0)
    • Android Studio at /Applications/Android Studio.app/Contents
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)

[✓] VS Code (version 1.46.0)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.11.0

[✓] Connected device (2 available)
    • Pixel 4 XL                • 99201FFBA000KF • android-arm64 • Android 10 (API 29)
    • Android SDK built for x86 • emulator-5554  • android-x86   • Android 7.1.1 (API 25) (emulator)

! Doctor found issues in 1 category.

pubspec.yaml

name: firestore_network_bug
description: A new Flutter project.
publish_to: 'none' 
version: 1.0.0+1
environment:
  sdk: ">=2.7.0 <3.0.0"
dependencies:
  flutter:
    sdk: flutter
  cupertino_icons: ^0.1.3
  firebase_analytics: ^5.0.14
  cloud_firestore: ^0.13.6
dev_dependencies:
  flutter_test:
    sdk: flutter
flutter:
  uses-material-design: true

/build.gradle

buildscript {
    ext.kotlin_version = '1.3.50'
    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.5.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        // Application specific configuration (dependencies)
        classpath 'com.google.gms:google-services:4.3.3'
        classpath 'com.google.firebase:firebase-crashlytics-gradle:2.1.1'
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
    project.evaluationDependsOn(':app')
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

/app/build.gradle

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
    flutterVersionCode = '1'
}

def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
    flutterVersionName = '1.0'
}

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
// Application specific configuration (plugins)
apply plugin: 'com.google.gms.google-services'
apply plugin: 'com.google.firebase.crashlytics'


android {
    compileSdkVersion 28

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }

    lintOptions {
        disable 'InvalidPackage'
    }

    defaultConfig {
        applicationId "com.example.firestore_network_bug"
        minSdkVersion 16
        targetSdkVersion 28
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
        // Application specific configuration (multidex)
        multiDexEnabled true

    }

    buildTypes {
        release {
            signingConfig signingConfigs.debug
        }
    }
}

flutter {
    source '../..'
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"

    // Application specific configuration (dependencies)
    implementation 'com.android.support:multidex:1.0.3'
    implementation 'com.google.firebase:firebase-analytics:17.2.2'
    implementation 'com.google.firebase:firebase-crashlytics:17.0.0'
    implementation 'com.google.firebase:firebase-firestore:21.4.3'
}

[mlemos]

Here is the debug console output:

Over Wifi - When the error happens

Please note that, over Wifi, Crashlytics also fails.

Launching lib/main.dart on Pixel 4 XL in debug mode...
✓ Built build/app/outputs/apk/debug/app-debug.apk.
Connecting to VM Service at ws://127.0.0.1:54122/cahgKkWqnBU=/ws
E/FirebaseCrashlytics(22411): Settings request failed.
E/FirebaseCrashlytics(22411): java.io.InterruptedIOException: timeout
E/FirebaseCrashlytics(22411): 	at okhttp3.RealCall.timeoutExit(RealCall.java:107)
E/FirebaseCrashlytics(22411): 	at okhttp3.RealCall.execute(RealCall.java:96)
E/FirebaseCrashlytics(22411): 	at com.google.firebase.crashlytics.internal.network.HttpRequest.execute(com.google.firebase:firebase-crashlytics@@17.0.0:129)
E/FirebaseCrashlytics(22411): 	at com.google.firebase.crashlytics.internal.settings.network.DefaultSettingsSpiCall.invoke(com.google.firebase:firebase-crashlytics@@17.0.0:86)
E/FirebaseCrashlytics(22411): 	at com.google.firebase.crashlytics.internal.settings.SettingsController$1.then(com.google.firebase:firebase-crashlytics@@17.0.0:200)
E/FirebaseCrashlytics(22411): 	at com.google.firebase.crashlytics.internal.settings.SettingsController$1.then(com.google.firebase:firebase-crashlytics@@17.0.0:193)
E/FirebaseCrashlytics(22411): 	at com.google.android.gms.tasks.zzp.run(Unknown Source:2)
E/FirebaseCrashlytics(22411): 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
E/FirebaseCrashlytics(22411): 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
E/FirebaseCrashlytics(22411): 	at com.google.firebase.crashlytics.internal.common.ExecutorUtils$1$1.onRun(com.google.firebase:firebase-crashlytics@@17.0.0:60)
E/FirebaseCrashlytics(22411): 	at com.google.firebase.crashlytics.internal.common.BackgroundPriorityRunnable.run(com.google.firebase:firebase-crashlytics@@17.0.0:27)
E/FirebaseCrashlytics(22411): 	at java.lang.Thread.run(Thread.java:919)
E/FirebaseCrashlytics(22411): Caused by: java.io.IOException: Canceled
E/FirebaseCrashlytics(22411): 	at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:120)
E/FirebaseCrashlytics(22411): 	at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
E/FirebaseCrashlytics(22411): 	at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
E/FirebaseCrashlytics(22411): 	at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:254)
E/FirebaseCrashlytics(22411): 	at okhttp3.RealCall.execute(RealCall.java:92)
E/FirebaseCrashlytics(22411): 	... 10 more
W/DynamiteModule(22411): Local module descriptor class for providerinstaller not found.
I/DynamiteModule(22411): Considering local module providerinstaller:0 and remote module providerinstaller:0
W/ProviderInstaller(22411): Failed to load providerinstaller module: No acceptable module found. Local version is 0 and remote version is 0.
I/ore_network_bu(22411): The ClassLoaderContext is a special shared library.
I/chatty  (22411): uid=10227(com.example.firestore_network_bug) AsyncTask #1 identical 1 line
I/ore_network_bu(22411): The ClassLoaderContext is a special shared library.
W/ore_network_bu(22411): Accessing hidden method Lsun/misc/Unsafe;->getLong(Ljava/lang/Object;J)J (greylist,core-platform-api, linking, allowed)
W/ore_network_bu(22411): Accessing hidden method Lsun/misc/Unsafe;->arrayBaseOffset(Ljava/lang/Class;)I (greylist,core-platform-api, linking, allowed)
W/ore_network_bu(22411): Accessing hidden method Lsun/misc/Unsafe;->copyMemory(JJJ)V (greylist, linking, allowed)
W/ore_network_bu(22411): Accessing hidden method Lsun/misc/Unsafe;->objectFieldOffset(Ljava/lang/reflect/Field;)J (greylist,core-platform-api, linking, allowed)
W/ore_network_bu(22411): Accessing hidden method Lsun/misc/Unsafe;->getByte(J)B (greylist,core-platform-api, linking, allowed)
W/ore_network_bu(22411): Accessing hidden method Lsun/misc/Unsafe;->getByte(Ljava/lang/Object;J)B (greylist,core-platform-api, linking, allowed)
W/ore_network_bu(22411): Accessing hidden method Lsun/misc/Unsafe;->getLong(J)J (greylist,core-platform-api, linking, allowed)
W/ore_network_bu(22411): Accessing hidden method Lsun/misc/Unsafe;->putByte(JB)V (greylist,core-platform-api, linking, allowed)
W/ore_network_bu(22411): Accessing hidden method Lsun/misc/Unsafe;->putByte(Ljava/lang/Object;JB)V (greylist,core-platform-api, linking, allowed)
W/ore_network_bu(22411): Accessing hidden method Lsun/misc/Unsafe;->getLong(Ljava/lang/Object;J)J (greylist,core-platform-api, reflection, allowed)
W/ore_network_bu(22411): Accessing hidden method Lsun/misc/Unsafe;->getLong(Ljava/lang/Object;J)J (greylist,core-platform-api, reflection, allowed)
W/ore_network_bu(22411): Accessing hidden field Ljava/nio/Buffer;->address:J (greylist, reflection, allowed)
V/NativeCrypto(22411): Registering com/google/android/gms/org/conscrypt/NativeCrypto's 286 native methods...
W/ore_network_bu(22411): Accessing hidden method Ljava/security/spec/ECParameterSpec;->getCurveName()Ljava/lang/String; (greylist, reflection, allowed)
I/ProviderInstaller(22411): Installed default security provider GmsCore_OpenSSL
W/Firestore(22411): (21.4.3) [OnlineStateTracker]: Could not reach Cloud Firestore backend. Backend didn't respond within 10 seconds
W/Firestore(22411):
W/Firestore(22411): This typically indicates that your device does not have a healthy Internet connection at the moment. The client will operate in offline mode until it is able to successfully connect to the backend.
W/DynamiteModule(22411): Local module descriptor class for providerinstaller not found.
I/DynamiteModule(22411): Considering local module providerinstaller:0 and remote module providerinstaller:0
W/ProviderInstaller(22411): Failed to load providerinstaller module: No acceptable module found. Local version is 0 and remote version is 0.
W/DynamiteModule(22411): Local module descriptor class for providerinstaller not found.
I/DynamiteModule(22411): Considering local module providerinstaller:0 and remote module providerinstaller:0
W/ProviderInstaller(22411): Failed to load providerinstaller module: No acceptable module found. Local version is 0 and remote version is 0.
W/DynamiteModule(22411): Local module descriptor class for providerinstaller not found.
I/DynamiteModule(22411): Considering local module providerinstaller:0 and remote module providerinstaller:0
W/ProviderInstaller(22411): Failed to load providerinstaller module: No acceptable module found. Local version is 0 and remote version is 0.
W/DynamiteModule(22411): Local module descriptor class for providerinstaller not found.
I/DynamiteModule(22411): Considering local module providerinstaller:0 and remote module providerinstaller:0
W/ProviderInstaller(22411): Failed to load providerinstaller module: No acceptable module found. Local version is 0 and remote version is 0.
W/DynamiteModule(22411): Local module descriptor class for providerinstaller not found.
I/DynamiteModule(22411): Considering local module providerinstaller:0 and remote module providerinstaller:0
W/ProviderInstaller(22411): Failed to load providerinstaller module: No acceptable module found. Local version is 0 and remote version is 0.
W/DynamiteModule(22411): Local module descriptor class for providerinstaller not found.
I/DynamiteModule(22411): Considering local module providerinstaller:0 and remote module providerinstaller:0
W/ProviderInstaller(22411): Failed to load providerinstaller module: No acceptable module found. Local version is 0 and remote version is 0.

Over LTE - When things work fine

Launching lib/main.dart on Pixel 4 XL in debug mode...
✓ Built build/app/outputs/apk/debug/app-debug.apk.
Connecting to VM Service at ws://127.0.0.1:54345/egB1v0JRe6c=/ws
W/DynamiteModule(23529): Local module descriptor class for providerinstaller not found.
I/DynamiteModule(23529): Considering local module providerinstaller:0 and remote module providerinstaller:0
W/ProviderInstaller(23529): Failed to load providerinstaller module: No acceptable module found. Local version is 0 and remote version is 0.
I/ore_network_bu(23529): The ClassLoaderContext is a special shared library.
I/chatty  (23529): uid=10227(com.example.firestore_network_bug) AsyncTask #1 identical 1 line
I/ore_network_bu(23529): The ClassLoaderContext is a special shared library.
W/ore_network_bu(23529): Accessing hidden method Lsun/misc/Unsafe;->getLong(Ljava/lang/Object;J)J (greylist,core-platform-api, linking, allowed)
W/ore_network_bu(23529): Accessing hidden method Lsun/misc/Unsafe;->arrayBaseOffset(Ljava/lang/Class;)I (greylist,core-platform-api, linking, allowed)
W/ore_network_bu(23529): Accessing hidden method Lsun/misc/Unsafe;->copyMemory(JJJ)V (greylist, linking, allowed)
W/ore_network_bu(23529): Accessing hidden method Lsun/misc/Unsafe;->objectFieldOffset(Ljava/lang/reflect/Field;)J (greylist,core-platform-api, linking, allowed)
W/ore_network_bu(23529): Accessing hidden method Lsun/misc/Unsafe;->getByte(J)B (greylist,core-platform-api, linking, allowed)
W/ore_network_bu(23529): Accessing hidden method Lsun/misc/Unsafe;->getByte(Ljava/lang/Object;J)B (greylist,core-platform-api, linking, allowed)
W/ore_network_bu(23529): Accessing hidden method Lsun/misc/Unsafe;->getLong(J)J (greylist,core-platform-api, linking, allowed)
W/ore_network_bu(23529): Accessing hidden method Lsun/misc/Unsafe;->putByte(JB)V (greylist,core-platform-api, linking, allowed)
W/ore_network_bu(23529): Accessing hidden method Lsun/misc/Unsafe;->putByte(Ljava/lang/Object;JB)V (greylist,core-platform-api, linking, allowed)
W/ore_network_bu(23529): Accessing hidden method Lsun/misc/Unsafe;->getLong(Ljava/lang/Object;J)J (greylist,core-platform-api, reflection, allowed)
W/ore_network_bu(23529): Accessing hidden method Lsun/misc/Unsafe;->getLong(Ljava/lang/Object;J)J (greylist,core-platform-api, reflection, allowed)
W/ore_network_bu(23529): Accessing hidden field Ljava/nio/Buffer;->address:J (greylist, reflection, allowed)
V/NativeCrypto(23529): Registering com/google/android/gms/org/conscrypt/NativeCrypto's 286 native methods...
W/ore_network_bu(23529): Accessing hidden method Ljava/security/spec/ECParameterSpec;->getCurveName()Ljava/lang/String; (greylist, reflection, allowed)
I/ProviderInstaller(23529): Installed default security provider GmsCore_OpenSSL
W/ore_network_bu(23529): Accessing hidden field Ljava/net/Socket;->impl:Ljava/net/SocketImpl; (greylist, reflection, allowed)
W/ore_network_bu(23529): Accessing hidden field Ljava/io/FileDescriptor;->descriptor:I (greylist, JNI, allowed)
W/ore_network_bu(23529): Accessing hidden method Ljava/security/spec/ECParameterSpec;->setCurveName(Ljava/lang/String;)V (greylist, reflection, allowed)
W/ore_network_bu(23529): Accessing hidden method Ldalvik/system/BlockGuard;->getThreadPolicy()Ldalvik/system/BlockGuard$Policy; (greylist,core-platform-api, linking, allowed)
W/ore_network_bu(23529): Accessing hidden method Ldalvik/system/BlockGuard$Policy;->onNetwork()V (greylist, linking, allowed)
I/flutter (23529): Document found!
I/flutter (23529): - {date: Timestamp(seconds=1590980400, nanoseconds=0), published: true, title: Hello World!, body: Firebase rocks and Firestore rocks also (when it works).}

[Ehesp]

I highly doubt this is an issue with FlutterFire, since it has no impact on how the native SDKs handle online/offline state.

[TahaTesser]

Hi @mlemos
I followed your steps and code sample, it loads document initially with no issues.
Please try another device or emulator and device know

flutter doctor -v

[✓] Flutter (Channel dev, 1.20.0-0.0.pre, on Mac OS X 10.15.5 19F101, locale
    en-GB)
    • Flutter version 1.20.0-0.0.pre at /Users/tahatesser/Code/flutter_dev
    • Framework revision d9653445f4 (6 days ago), 2020-06-09 18:43:03 -0400
    • Engine revision e8c13aa012
    • Dart version 2.9.0 (build 2.9.0-14.0.dev 5c1376615e)

 
[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.0)
    • Android SDK at /Users/tahatesser/Code/sdk
    • Platform android-30, build-tools 30.0.0
    • ANDROID_HOME = /Users/tahatesser/Code/sdk
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 11.5)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 11.5, Build version 11E608c
    • CocoaPods version 1.9.3

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 4.0)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 46.0.2
    • Dart plugin version 193.7361
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)

[✓] VS Code (version 1.46.0)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.11.0

[✓] Connected device (5 available)
    • SM M305F      • 32003c30dc19668f          • android-arm64  • Android 10 (API 29)
    • Taha’s iPhone • 00008020-001059882212002E • ios            • iOS 13.5.1
    • macOS         • macOS                     • darwin-x64     • Mac OS X 10.15.5 19F101
    • Web Server    • web-server                • web-javascript • Flutter Tools
    • Chrome        • chrome                    • web-javascript • Google Chrome 83.0.4103.97

• No issues found!

Thank you

[dhuma1981]

I am also facing the similar issue, in my case, it reaches to the cloud_firestore but returns null in _data with real iOS device when connected to WiFi.

[mlemos]

HI @TahaTesser , I just performed a "reset to factory defaults" on my Pixel 3XL and the problem persisted. It happens on both my Pixel 4XL and Pixel 3XL. I'll grab another device today and perform more testing.

What is interesting is that both Firestore and Crashlytics provide error messages while running over wifi. It seems that the firebase plugin is not correctly identifying the connectivity status and is assuming that it is not connected over wifi in those circumstances.

Probably a shared code between Crashlytics and Firestore causing the error on both packages.

Crashlytics error:

E/FirebaseCrashlytics(22411): Settings request failed.
E/FirebaseCrashlytics(22411): java.io.InterruptedIOException: timeout
E/FirebaseCrashlytics(22411): 	at okhttp3.RealCall.timeoutExit(RealCall.java:107)
E/FirebaseCrashlytics(22411): 	at okhttp3.RealCall.execute(RealCall.java:96)

Firestore Error:

W/Firestore(22411): (21.4.3) [OnlineStateTracker]: Could not reach Cloud Firestore backend. Backend didn't respond within 10 seconds
W/Firestore(22411):
W/Firestore(22411): This typically indicates that your device does not have a healthy Internet connection at the moment. The client will operate in offline mode until it is able to successfully connect to the backend.

[mlemos]

Hi @TahaTesser, I finally put my hands in another device and the results were the same.

I have also updated my Flutter environment and all libraries.

The key error messages are:

...
D/NetworkManagementSocketTagger(29981): tagSocket(62) with statsTag=0xffffffff, statsUid=-1
E/FirebaseInstanceId(29981): binding to the service failed
...
/FirebaseCrashlytics(29981): Settings request failed.
E/FirebaseCrashlytics(29981): java.io.InterruptedIOException: timeout
E/FirebaseCrashlytics(29981): 	at okhttp3.RealCall.timeoutExit(RealCall.java:107)
E/FirebaseCrashlytics(29981): 	at okhttp3.RealCall.execute(RealCall.java:96)
...
D/ConnectivityManager(29981): requestNetwork; CallingUid : 10263, CallingPid : 29981
W/DynamiteModule(29981): Local module descriptor class for providerinstaller not found.
I/DynamiteModule(29981): Considering local module providerinstaller:0 and remote module providerinstaller:0
W/ProviderInstaller(29981): Failed to load providerinstaller module: No acceptable module found. Local version is 0 and remote version is 0.
I/ject.spread_de(29981): The ClassLoaderContext is a special shared library.
I/chatty  (29981): uid=10263(net.spreadproject.spread_dev) AsyncTask #2 identical 1 line
I/ject.spread_de(29981): The ClassLoaderContext is a special shared library.
V/NativeCrypto(29981): Registering com/google/android/gms/org/conscrypt/NativeCrypto's 286 native methods...
W/ject.spread_de(29981): Accessing hidden field Ljava/nio/Buffer;->address:J (light greylist, reflection)
W/ject.spread_de(29981): Accessing hidden method Ljava/security/spec/ECParameterSpec;->getCurveName()Ljava/lang/String; (light greylist, reflection)
I/ject.spread_de(29981): Waiting for a blocking GC ClassLinker
I/ject.spread_de(29981): Background concurrent copying GC freed 53995(2MB) AllocSpace objects, 62(2MB) LOS objects, 67% free, 2MB/8MB, paused 281us total 107.391ms
I/ject.spread_de(29981): WaitForGcToComplete blocked ClassLinker on ClassLinker for 58.302ms
I/ProviderInstaller(29981): Installed default security provider GmsCore_OpenSSL
D/ConnectivityManager(29981): requestNetwork; CallingUid : 10263, CallingPid : 29981
D/NetworkManagementSocketTagger(29981): tagSocket(116) with statsTag=0xffffffff, statsUid=-1
W/Firestore(29981): (21.4.3) [OnlineStateTracker]: Could not reach Cloud Firestore backend. Backend didn't respond within 10 seconds
W/Firestore(29981):
W/Firestore(29981): This typically indicates that your device does not have a healthy Internet connection at the moment. The client will operate in offline mode until it is able to successfully connect to the backend.
I/flutter (29981):   [2020-06-20 17:39:09.303984] DashNavigationBar >> healthStatus is: unknown
D/ConnectivityManager(29981): unregisterNetworkCallback; CallingUid : 10263, CallingPid : 29981
W/DynamiteModule(29981): Local module descriptor class for providerinstaller not found.

Flutter Doctor -v is:

[✓] Flutter (Channel stable, v1.17.4, on Mac OS X 10.15.5 19F101, locale en-US)
    • Flutter version 1.17.4 at /Users/mlemos/Documents/flutter
    • Framework revision 1ad9baa8b9 (3 days ago), 2020-06-17 14:41:16 -0700
    • Engine revision ee76268252
    • Dart version 2.8.4

 
[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
    • Android SDK at /Users/mlemos/Library/Android/sdk
    • Platform android-30, build-tools 29.0.2
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 11.5)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 11.5, Build version 11E608c
    • CocoaPods version 1.9.1

[!] Android Studio (version 4.0)
    • Android Studio at /Applications/Android Studio.app/Contents
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)

[✓] VS Code (version 1.46.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.11.0

[✓] Connected device (1 available)
    • SM J415G • 1abf0307 • android-arm • Android 9 (API 28)

! Doctor found issues in 1 category.

[mlemos]

Strangely, now the tests are like this:

• Samsung Phone => Works on Wifi and 3G.
• Pixel 3XL => Fails on Wifi & Works on 3G.
• Pixel 4XL => Fails on Wifi & Works on 3G.

All of them using the same Wifi and same 3G network.

[emostar]

@mlemos Are you able to access the firestore hostname from a browser on the devices that are not working?