Flutterfire: 🐛 [cloud_firestore] Listening to firestore collection can freeze UI thread or crash due to memory leak
Bug report
When listening to a Firestore collection and calling a function with List<DocumentSnapshot> argument in a separate isolate leads to memory leak. When function argument is changed to int for example, there is no memory leak.
Steps to reproduce
Memory leak when argument is List<DocumentSnapshot>:
firestore.collection('`myCollection').snapshots().listen(
(querySnapshot) {
compute(functionWithDocsArg, querySnapshot.docs);
},
);
int functionWithDocsArg(List<DocumentSnapshot> docs) {
debugPrint("DateTime.now():");
debugPrint(DateTime.now().toString());
debugPrint('functionWithDocsArg computed!');
return 0;
}
No memory leak when function is argument is different than List<DocumentSnapshot> for example int:
firestore.collection('`myCollection').snapshots().listen(
(querySnapshot) {
compute(functionWithIntArg, 33);
},
);
int functionWithIntArg(int x) {
debugPrint("DateTime.now():");
debugPrint(DateTime.now().toString());
debugPrint('functionWithIntArg computed!');
return 0;
}
Expected behavior
There should be no memory leak.
Additional context
Interestingly, even with functionWithIntArg, the memory is not released until the next computation fired.
Flutter doctor
Run flutter doctor and paste the output below:
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[√] Flutter (Channel stable, 1.22.3, on Microsoft Windows [Version 10.0.19041.630], locale tr-TR)
[√] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
[!] Android Studio (version 4.1.0)
X Flutter plugin not installed; this adds Flutter specific functionality.
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[√] Connected device (1 available)
! Doctor found issues in 2 categories.
Flutter dependencies
Run flutter pub deps -- --style=compact and paste the output below:
Click To Expand
Dart SDK 2.10.3
Flutter SDK 1.22.3
dependencies:
- ads 2.1.1 [flutter firebase_admob]
- analyzer 0.39.17 [_fe_analyzer_shared args charcode cli_util collection convert crypto glob html meta package_config path pub_semver source_span watcher yaml]
- app_review 2.0.1 [http intl package_info url_launcher flutter]
- apple_sign_in 0.1.0 [flutter]
- auth 7.2.0 [flutter firebase_core firebase_auth google_sign_in google_sign_in_platform_interface flutter_login_facebook flutter_twitter]
- auto_size_text 2.1.0 [flutter]
- basics 0.4.0+1 [quiver]
- built_value 7.1.0 [built_collection collection fixnum quiver]
- cached_network_image 2.3.3 [flutter flutter_cache_manager octo_image]
- catcher 0.3.22 [flutter flutter_web_plugins fluttertoast device_info package_info mailer dio flutter_mailer logging sentry]
- characters 1.1.0-nullsafety.3
- cloud_firestore 0.14.3 [flutter meta quiver firebase_core firebase_core_platform_interface cloud_firestore_platform_interface cloud_firestore_web]
- cloud_functions 0.7.0+1 [meta flutter firebase_core firebase_core_platform_interface cloud_functions_platform_interface cloud_functions_web]
- condition 0.0.8 [flutter]
- csv 4.1.0
- cupertino_icons 1.0.0
- dartx 0.5.0 [collection path crypto characters time meta]
- deep_pick 0.5.1
- diacritic 0.1.1
- dio 3.0.10 [http_parser path]
- dio_http_cache 0.2.11 [flutter quiver json_serializable json_annotation dio sqflite path crypto]
- easy_localization 2.3.3 [flutter intl shared_preferences args path flutter_localizations]
- edit_distance 0.4.1
- firebase_analytics 6.2.0 [meta flutter firebase_core firebase_analytics_web firebase_analytics_platform_interface]
- firebase_auth 0.18.3 [meta firebase_core firebase_core_platform_interface firebase_auth_platform_interface firebase_auth_web flutter]
- firebase_core 0.5.2 [firebase_core_platform_interface flutter quiver meta firebase_core_web]
- firebase_crashlytics 0.2.3 [flutter stack_trace firebase_core firebase_core_platform_interface firebase_crashlytics_platform_interface]
- firebase_dynamic_links 0.6.2 [flutter firebase_core]
- firebase_messaging 7.0.3 [meta flutter firebase_core]
- flutter 0.0.0 [characters collection meta typed_data vector_math sky_engine]
- flutter_icons 1.1.0 [flutter]
- flutter_localizations 0.0.0 [flutter intl characters collection meta path typed_data vector_math]
- flutter_mobx 1.1.0+2 [mobx flutter]
- flutter_mobx_helpers 1.0.1 [mobx flutter]
- flutter_native_timezone 1.0.4 [flutter]
- flutter_platform_widgets 0.71.0 [flutter]
- flutter_secure_storage 3.3.5 [meta flutter]
- flutter_svg 0.19.1 [flutter meta path_drawing vector_math xml]
- google_fonts 1.1.1 [flutter http path_provider crypto pedantic]
- hive 1.4.4+1 [meta crypto]
- hive_flutter 0.3.1 [flutter hive path_provider path]
- mobx 1.2.1+4 [meta]
- mobx_codegen 1.1.2 [analyzer build build_resolvers meta mobx path source_gen]
- provider 4.3.2+2 [flutter nested collection]
- purchases_flutter 1.4.3 [flutter]
- sailor 0.7.1 [flutter]
- share 0.6.5+4 [meta mime flutter]
- stream_transform 1.2.0
- table_calendar 2.3.0 [flutter intl simple_gesture_detector]
- table_sticky_headers 1.2.0 [flutter]
dev dependencies:
- build_runner 1.10.2 [args async build build_config build_daemon build_resolvers build_runner_core code_builder collection crypto dart_style glob graphs http_multi_server io js logging
meta mime path pedantic pool pub_semver pubspec_parse shelf shelf_web_socket stack_trace stream_transform timing watcher web_socket_channel yaml]
- built_value_generator 7.1.0 [analyzer build build_config built_collection built_value source_gen quiver]
- effective_dart 1.3.0
- flutter_driver 0.0.0 [file json_rpc_2 meta path web_socket_channel vm_service_client webdriver flutter flutter_test fuchsia_remote_debug_protocol archive args async boolean_selector ch
aracters charcode clock collection convert crypto fake_async matcher platform process pub_semver source_span stack_trace stream_channel string_scanner sync_http term_glyph test_api typed
_data vector_math]
- flutter_launcher_icons 0.8.1 [image args yaml path]
- flutter_test 0.0.0 [flutter test_api path fake_async clock stack_trace vector_math async boolean_selector characters charcode collection matcher meta source_span stream_channel string_
scanner term_glyph typed_data]
- test 1.16.0-nullsafety.5 [analyzer async boolean_selector coverage http http_multi_server io js node_preamble package_config path pedantic pool shelf shelf_packages_handler shelf_stati
c shelf_web_socket source_span stack_trace stream_channel typed_data web_socket_channel webkit_inspection_protocol yaml test_api test_core]
transitive dependencies:
- _fe_analyzer_shared 7.0.0 [meta]
- archive 2.0.13 [crypto args path]
- args 1.6.0
- async 2.5.0-nullsafety.1 [collection]
- boolean_selector 2.1.0-nullsafety.1 [source_span string_scanner]
- build 1.3.0 [analyzer async convert crypto logging meta path glob]
- build_config 0.4.2 [checked_yaml json_annotation meta path pubspec_parse yaml]
- build_daemon 2.1.4 [built_collection built_value http_multi_server logging pedantic path pool shelf shelf_web_socket stream_transform watcher web_socket_channel]
- build_resolvers 1.3.11 [analyzer build crypto graphs logging path package_config pub_semver]
- build_runner_core 6.0.1 [async build build_config build_resolvers collection convert crypto glob graphs json_annotation logging meta path package_config pedantic pool timing watcher ya
ml]
- built_collection 4.3.2 [collection quiver]
- charcode 1.2.0-nullsafety.1
- checked_yaml 1.0.2 [json_annotation source_span yaml]
- cli_util 0.2.0 [path]
- clock 1.1.0-nullsafety.1
- cloud_firestore_platform_interface 2.2.0 [flutter meta collection firebase_core plugin_platform_interface]
- cloud_firestore_web 0.2.1 [flutter flutter_web_plugins http_parser meta firebase_core firebase_core_web cloud_firestore_platform_interface js]
- cloud_functions_platform_interface 3.0.1 [flutter meta firebase_core plugin_platform_interface]
- cloud_functions_web 3.0.1 [firebase_core cloud_functions_platform_interface flutter flutter_web_plugins firebase http_parser meta]
- code_builder 3.5.0 [built_collection built_value collection matcher meta]
- collection 1.15.0-nullsafety.3
- convert 2.1.1 [charcode typed_data]
- coverage 0.14.2 [args logging package_config path source_maps stack_trace vm_service]
- crypto 2.1.5 [collection convert typed_data]
- csslib 0.16.2 [source_span]
- dart_style 1.3.6 [analyzer args path source_span]
- device_info 0.4.2+10 [flutter device_info_platform_interface]
- device_info_platform_interface 1.0.1 [flutter meta plugin_platform_interface]
- fake_async 1.2.0-nullsafety.1 [clock collection]
- ffi 0.1.3
- file 6.0.0-nullsafety.2 [meta path]
- firebase 7.3.2 [http http_parser js]
- firebase_admob 0.10.2 [meta flutter firebase_core]
- firebase_analytics_platform_interface 1.0.3 [flutter meta]
- firebase_analytics_web 0.1.1 [flutter flutter_web_plugins firebase firebase_analytics_platform_interface meta]
- firebase_auth_platform_interface 2.1.3 [flutter meta firebase_core plugin_platform_interface]
- firebase_auth_web 0.3.2 [flutter flutter_web_plugins meta http_parser intl firebase_core firebase_core_web firebase_auth_platform_interface js]
- firebase_core_platform_interface 2.0.0 [flutter meta plugin_platform_interface quiver]
- firebase_core_web 0.2.1 [firebase_core_platform_interface flutter flutter_web_plugins meta js]
- firebase_crashlytics_platform_interface 1.1.3 [flutter meta collection firebase_core plugin_platform_interface]
- fixnum 0.10.11
- flutter_blurhash 0.5.0 [flutter meta]
- flutter_cache_manager 2.0.0 [flutter path_provider uuid http path sqflite pedantic clock file rxdart]
- flutter_login_facebook 0.2.1+1 [flutter list_ext]
- flutter_mailer 1.0.1 [flutter]
- flutter_twitter 1.1.3 [flutter]
- flutter_web_plugins 0.0.0 [flutter characters collection meta typed_data vector_math]
- fluttertoast 7.1.1 [flutter flutter_web_plugins]
- fuchsia_remote_debug_protocol 0.0.0 [json_rpc_2 process web_socket_channel flutter_test flutter_driver archive args async boolean_selector charcode clock collection convert crypto fake
_async file matcher meta path platform pub_semver source_span stack_trace stream_channel string_scanner sync_http term_glyph test_api typed_data vector_math vm_service_client webdriver]
- glob 1.2.0 [async collection node_io path pedantic string_scanner]
- google_sign_in 4.5.6 [google_sign_in_platform_interface flutter meta google_sign_in_web]
- google_sign_in_platform_interface 1.1.2 [flutter meta quiver]
- google_sign_in_web 0.9.2 [google_sign_in_platform_interface flutter flutter_web_plugins meta js]
- graphs 0.2.0
- html 0.14.0+4 [csslib source_span]
- http 0.12.2 [http_parser path pedantic]
- http_multi_server 2.2.0 [async]
- http_parser 3.1.4 [charcode collection source_span string_scanner typed_data]
- image 2.1.19 [archive xml meta]
- intl 0.16.1 [path]
- io 0.3.4 [charcode meta path string_scanner]
- js 0.6.3-nullsafety.2
- json_annotation 3.1.0
- json_rpc_2 2.2.2 [stack_trace stream_channel]
- json_serializable 3.5.0 [analyzer build build_config json_annotation meta path source_gen]
- list_ext 0.1.14 [quiver collection]
- logging 0.11.4
- mailer 3.2.1 [async logging intl mime path pedantic]
- matcher 0.12.10-nullsafety.1 [stack_trace]
- meta 1.3.0-nullsafety.3
- mime 0.9.7
- nested 0.0.4 [flutter]
- node_interop 1.2.0 [js]
- node_io 1.1.1 [node_interop path]
- node_preamble 1.4.12
- octo_image 0.3.0 [flutter flutter_blurhash]
- package_config 1.9.3 [path charcode]
- package_info 0.4.3+2 [flutter]
- path 1.8.0-nullsafety.1
- path_drawing 0.4.1+1 [vector_math meta path_parsing flutter]
- path_parsing 0.1.4 [vector_math meta]
- path_provider 1.6.24 [flutter path_provider_platform_interface path_provider_macos path_provider_linux path_provider_windows]
- path_provider_linux 0.0.1+2 [path xdg_directories path_provider_platform_interface flutter]
- path_provider_macos 0.0.4+6 [flutter]
- path_provider_platform_interface 1.0.4 [flutter meta platform plugin_platform_interface]
- path_provider_windows 0.0.4+3 [path_provider_platform_interface meta path flutter ffi win32]
- pedantic 1.10.0-nullsafety.2
- petitparser 3.1.0 [meta]
- platform 3.0.0-nullsafety.2
- plugin_platform_interface 1.0.3 [meta]
- pool 1.5.0-nullsafety.2 [async stack_trace]
- process 4.0.0-nullsafety.2 [file path platform]
- pub_semver 1.4.4 [collection]
- pubspec_parse 0.1.5 [checked_yaml json_annotation pub_semver yaml]
- quiver 2.1.5 [matcher meta]
- rxdart 0.24.1
- sentry 3.0.1 [http meta stack_trace usage pedantic]
- shared_preferences 0.5.12+4 [meta flutter shared_preferences_platform_interface shared_preferences_linux shared_preferences_macos shared_preferences_web shared_preferences_windows]
- shared_preferences_linux 0.0.2+4 [file flutter meta path path_provider_linux shared_preferences_platform_interface]
- shared_preferences_macos 0.0.1+11 [shared_preferences_platform_interface flutter]
- shared_preferences_platform_interface 1.0.4 [meta flutter]
- shared_preferences_web 0.1.2+7 [shared_preferences_platform_interface flutter flutter_web_plugins meta]
- shared_preferences_windows 0.0.1+3 [shared_preferences_platform_interface flutter ffi file meta path path_provider_platform_interface path_provider_windows]
- shelf 0.7.9 [async collection http_parser path stack_trace stream_channel]
- shelf_packages_handler 2.0.0 [path shelf shelf_static]
- shelf_static 0.2.8 [convert http_parser mime path shelf]
- shelf_web_socket 0.2.3 [shelf web_socket_channel stream_channel]
- simple_gesture_detector 0.1.4 [flutter]
- sky_engine 0.0.99
- source_gen 0.9.7+1 [analyzer async build dart_style glob meta path pedantic source_span]
- source_map_stack_trace 2.1.0-nullsafety.3 [path stack_trace source_maps]
- source_maps 0.10.10-nullsafety.2 [source_span]
- source_span 1.8.0-nullsafety.2 [charcode collection path term_glyph]
- sqflite 1.3.2+1 [flutter sqflite_common path]
- sqflite_common 1.0.2+1 [synchronized path meta]
- stack_trace 1.10.0-nullsafety.1 [path]
- stream_channel 2.1.0-nullsafety.1 [async]
- string_scanner 1.1.0-nullsafety.1 [charcode source_span]
- sync_http 0.2.0
- synchronized 2.2.0+2
- term_glyph 1.2.0-nullsafety.1
- test_api 0.2.19-nullsafety.2 [async boolean_selector collection meta path source_span stack_trace stream_channel string_scanner term_glyph matcher]
- test_core 0.3.12-nullsafety.5 [analyzer async args boolean_selector collection coverage glob io meta package_config path pedantic pool source_map_stack_trace source_maps source_span st
ack_trace stream_channel vm_service yaml matcher test_api]
- time 1.3.0
- timing 0.1.1+2 [json_annotation]
- typed_data 1.3.0-nullsafety.3 [collection]
- url_launcher 5.7.10 [flutter url_launcher_platform_interface url_launcher_web url_launcher_linux url_launcher_macos url_launcher_windows]
- url_launcher_linux 0.0.1+4 [flutter]
- url_launcher_macos 0.0.1+9 [flutter]
- url_launcher_platform_interface 1.0.9 [flutter meta plugin_platform_interface]
- url_launcher_web 0.1.5+1 [url_launcher_platform_interface flutter flutter_web_plugins meta]
- url_launcher_windows 0.0.1+3 [flutter]
- usage 3.4.2 [path]
- uuid 2.2.2 [crypto convert]
- vector_math 2.1.0-nullsafety.3
- vm_service 5.5.0 [meta]
- vm_service_client 0.2.6+2 [async collection json_rpc_2 pub_semver source_span stack_trace stream_channel web_socket_channel]
- watcher 0.9.7+15 [async path pedantic]
- web_socket_channel 1.1.0 [async crypto stream_channel]
- webdriver 2.1.2 [archive matcher path stack_trace sync_http]
- webkit_inspection_protocol 0.7.4 [logging]
- win32 1.7.3 [ffi]
- xdg_directories 0.1.2 [meta path process]
- xml 4.5.1 [collection convert meta petitparser]
- yaml 2.2.1 [charcode collection string_scanner source_span]
deadsoul44
All 6 comments
Hi @deadsoul44
Could you please provide a minimal complete reproducible code sample?
Thank you
markusaksli-nc
on 16 Nov 2020
I tried to write a test but failed.
import 'dart:async';
import 'dart:math';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:cloud_firestore_platform_interface/src/method_channel/method_channel_firestore.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_core_platform_interface/firebase_core_platform_interface.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter_test/flutter_test.dart';
import './mock.dart';
void main() {
setupCloudFirestoreMocks();
FirebaseFirestore firestore;
FirebaseFirestore firestoreSecondary;
MethodChannelFirebaseFirestore.channel.setMockMethodCallHandler((call) async {
String path = call.arguments['path'];
if (call.method == 'DocumentReference#get' && path == 'doc/exists') {
return {
'data': {
'foo': 'bar',
},
'metadata': {
'hasPendingWrites': true,
'isFromCache': true,
}
};
}
if (call.method == 'DocumentReference#set') {
return {
'data': {
'foo': 'bar',
},
};
}
return null;
});
Timer timer;
Random random;
group("$CollectionReference", () {
setUpAll(() async {
await Firebase.initializeApp();
var secondaryApp = await Firebase.initializeApp(
name: 'foo',
options: FirebaseOptions(
apiKey: '123',
appId: '123',
messagingSenderId: '123',
projectId: '123',
));
firestore = FirebaseFirestore.instance;
firestoreSecondary = FirebaseFirestore.instanceFor(app: secondaryApp);
random = Random();
timer = Timer.periodic(
Duration(seconds: 1),
(t) {
var barNextInt = random.nextInt(999);
var bazNextInt = random.nextInt(999);
firestoreSecondary.collection('foo').doc('bar').set({'nextInt': barNextInt});
firestoreSecondary.collection('foo').doc('baz').set({'nextInt': bazNextInt});
},
);
firestoreSecondary.collection('foo').snapshots().listen(
(querySnapshot) {
compute(functionWithDocsArg, querySnapshot.docs);
},
);
});
test('extends $Query', () async {
var ref = firestore.collection('foo');
await Future.delayed(const Duration(seconds: 29), () {});
expect(ref.firestore, equals(firestore));
});
});
}
int functionWithDocsArg(List<DocumentSnapshot> docs) {
debugPrint("DateTime.now():");
debugPrint(DateTime.now().toString());
debugPrint('functionWithDocsArg computed!');
return 0;
}
Error:
MissingPluginException(No implementation found for method Query#addSnapshotListener on channel plugins.flutter.io/firebase_firestore)
package:flutter/src/services/platform_channel.dart 157:7 MethodChannel._invokeMethod
===== asynchronous gap ===========================
dart:async _asyncErrorWrapperHelper
package:cloud_firestore_platform_interface/src/method_channel/method_channel_query.dart MethodChannelQuery.snapshots.<fn>
I am not sure if it is reproducable. If you have an idea, just let me know.
deadsoul44
on 17 Nov 2020
You don't need to write a full mocked test for this. If the issue is reproducible with a basic test collection and an isolate in a fresh example project basic main.dart that is all we need.
But we do need a reproducible sample where we can also see the reported behavior in DevTools or a profiler.
markusaksli-nc
on 18 Nov 2020
Using plain Dart Isolates, I was able to avoid memory leak. But, I thought that creates a lot of overhead spawning an isolate and running the function every time firestore listener fired. So, I tried to initialize firebase and listen to firestore on an Isolate but it is not possible because plain Dart isolates do not support plugins. As a result, I tried to use IsolateHandler package which enables using plugins on isolates. But, I still have main UI thread freezing problem although firestore listener is completely running on a separate isolate. I guess it still tries to use main thread. I filed another issue for this.
I am no longer interested in this issue but it is still there which may cause headache later for some other people. If you want to work on it, I already provided the steps to reproduce it.
deadsoul44
on 19 Nov 2020
I was able to reproduce this on the latest master 1.24.0-8.0.pre.304 with
firebase_core: ^0.5.2 and cloud_firestore: ^0.14.3.
The list argument didn't seem to change anything.
flutter doctor -v
[✓] Flutter (Channel master, 1.24.0-8.0.pre.304, on macOS 11.0.1 20B29 darwin-x64, locale en-GB)
• Flutter version 1.24.0-8.0.pre.304 at /Users/markus/development/flutter_master
• Framework revision c6290500f8 (12 hours ago), 2020-11-18 17:29:28 -0800
• Engine revision 35a0b9fe68
• Dart version 2.12.0 (build 2.12.0-50.0.dev)
[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.1)
• Android SDK at /Users/markus/Library/Android/sdk
• Platform android-30, build-tools 30.0.1
• Java binary at: /Users/markus/Library/Application Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/201.6953283/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6915495)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 12.2)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 12.2, Build version 12B45b
• CocoaPods version 1.10.0
[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 4.1)
• Android Studio at /Users/markus/Library/Application Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/201.6953283/Android Studio.app/Contents
• 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
• Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6915495)
[✓] Connected device (4 available)
• Nevercode’s iPhone (mobile) • b668e524315069f3db3661ac11ff1f66afafebdb • ios • iOS 14.2
• macOS (desktop) • macos • darwin-x64 • macOS 11.0.1 20B29 darwin-x64
• Web Server (web) • web-server • web-javascript • Flutter Tools
• Chrome (web) • chrome • web-javascript • Google Chrome 87.0.4280.67
• No issues found!
Minimal reproducible code sample
import 'dart:async';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
Future<void> main() async {
WidgetsFlutterBinding.ensureInitialized();
await Firebase.initializeApp();
runApp(MyApp());
}
class MyApp extends StatefulWidget {
@override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
Timer timer = null;
num i = 0;
@override
void initState() {
super.initState();
FirebaseFirestore.instance.collection('test').snapshots().listen((event) => compute(functionWithDocsArg, event.docs.length));
}
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text("DocumentReference example"),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
RaisedButton(
child: Text(timer == null ? "Start updating document" : "Stop"),
onPressed: () {
if (timer == null) {
setState(() {
timer = Timer.periodic(Duration(milliseconds: 100), (t) {
i++;
FirebaseFirestore.instance.collection('test').doc('testA').set({"int": i}).catchError((e) => print(e));
FirebaseFirestore.instance.collection('test').doc('testB').set({"int": i}).catchError((e) => print(e));
});
});
} else {
setState(() {
timer.cancel();
timer = null;
i = 0;
});
}
},
),
CircularProgressIndicator(),
],
),
),
),
);
}
}
int functionWithDocsArg(int docs) {
debugPrint("DateTime.now():");
debugPrint(DateTime.now().toString());
debugPrint('functionWithDocsArg computed!');
return 0;
}
This does hang the UI thread and can crash pretty easily.
Logs
E/CursorWindow(13721): CursorWindow: mmap() failed: errno=12.
D/AndroidRuntime(13721): Shutting down VM
E/AndroidRuntime(13721): FATAL EXCEPTION: main
E/AndroidRuntime(13721): Process: com.nevercode.triage, PID: 13721
E/AndroidRuntime(13721): java.lang.RuntimeException: Internal error in Cloud Firestore (21.7.1).
E/AndroidRuntime(13721): at com.google.firebase.firestore.util.AsyncQueue.lambda$panic$3(AsyncQueue.java:534)
E/AndroidRuntime(13721): at com.google.firebase.firestore.util.AsyncQueue$$Lambda$3.run(Unknown Source:2)
E/AndroidRuntime(13721): at android.os.Handler.handleCallback(Handler.java:938)
E/AndroidRuntime(13721): at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime(13721): at android.os.Looper.loop(Looper.java:223)
E/AndroidRuntime(13721): at android.app.ActivityThread.main(ActivityThread.java:7656)
E/AndroidRuntime(13721): at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime(13721): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
E/AndroidRuntime(13721): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
E/AndroidRuntime(13721): Caused by: android.database.CursorWindowAllocationException: Could not allocate CursorWindow '/data/user/0/com.nevercode.triage/databases/firestore.%5BDEFAULT%5D.triage-79c7c.%28default%29' of size 2097152 due to error -12.
E/AndroidRuntime(13721): at android.database.CursorWindow.nativeCreate(Native Method)
E/AndroidRuntime(13721): at android.database.CursorWindow.<init>(CursorWindow.java:139)
E/AndroidRuntime(13721): at android.database.CursorWindow.<init>(CursorWindow.java:120)
E/AndroidRuntime(13721): at android.database.AbstractWindowedCursor.clearOrCreateWindow(AbstractWindowedCursor.java:202)
E/AndroidRuntime(13721): at android.database.sqlite.SQLiteCursor.fillWindow(SQLiteCursor.java:147)
E/AndroidRuntime(13721): at android.database.sqlite.SQLiteCursor.getCount(SQLiteCursor.java:140)
E/AndroidRuntime(13721): at android.database.AbstractCursor.moveToPosition(AbstractCursor.java:231)
E/AndroidRuntime(13721): at android.database.AbstractCursor.moveToNext(AbstractCursor.java:280)
E/AndroidRuntime(13721): at com.google.firebase.firestore.local.SQLitePersistence$Query.forEach(SQLitePersistence.java:463)
E/AndroidRuntime(13721): at com.google.firebase.firestore.local.SQLiteRemoteDocumentCache.getAll(SQLiteRemoteDocumentCache.java:113)
E/AndroidRuntime(13721): at com.google.firebase.firestore.local.LocalStore.lambda$applyRemoteEvent$5(LocalStore.java:381)
E/AndroidRuntime(13721): at com.google.firebase.firestore.local.LocalStore$$Lambda$6.get(Unknown Source:6)
E/AndroidRuntime(13721): at com.google.firebase.firestore.local.SQLitePersistence.runTransaction(SQLitePersistence.java:207)
E/AndroidRuntime(13721): at com.google.firebase.firestore.local.LocalStore.applyRemoteEvent(LocalStore.java:337)
E/AndroidRuntime(13721): at com.google.firebase.firestore.core.SyncEngine.handleRemoteEvent(SyncEngine.java:342)
E/AndroidRuntime(13721): at com.google.firebase.firestore.core.MemoryComponentProvider$RemoteStoreCallback.handleRemoteEvent(MemoryComponentProvider.java:94)
E/AndroidRuntime(13721): at com.google.firebase.firestore.remote.RemoteStore.raiseWatchSnapshot(RemoteStore.java:552)
E/AndroidRuntime(13721): at com.google.firebase.firestore.remote.RemoteStore.handleWatchChange(RemoteStore.java:464)
E/AndroidRuntime(13721): at com.google.firebase.firestore.remote.RemoteStore.access$100(RemoteStore.java:53)
E/AndroidRuntime(13721): at com.google.firebase.firestore.remote.RemoteStore$1.onWatchChange(RemoteStore.java:176)
E/AndroidRuntime(13721): at com.google.firebase.firestore.remote.WatchStream.onNext(WatchStream.java:108)
E/AndroidRuntime(13721): at com.google.firebase.firestore.remote.WatchStream.onNext(WatchStream.java:38)
E/AndroidRuntime(13721): at com.google.firebase.firestore.remote.AbstractStream$StreamObserver.lambda$onNext$1(AbstractStream.java:119)
E/AndroidRuntime(13721): at com.google.firebase.firestore.remote.AbstractStream$StreamObserver$$Lambda$2.run(Unknown Source:4)
E/AndroidRuntime(13721): at com.google.firebase.firestore.remote.AbstractStream$CloseGuardedRunner.run(AbstractStream.java:67)
E/AndroidRuntime(13721): at com.google.firebase.firestore.remote.AbstractStream$StreamObserver.onNext(AbstractStream.java:110)
E/AndroidRuntime(13721): at com.google.firebase.firestore.remote.FirestoreChannel$1.onMessage(FirestoreChannel.java:125)
E/AndroidRuntime(13721): at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1MessagesAvailable.runInternal(ClientCallImpl.java:658)
E/AndroidRuntime(13721): at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1MessagesAvailable.runInContext(ClientCallImpl.java:643)
E/AndroidRuntime(13721): at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
E/AndroidRuntime(13721): at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:123)
E/AndroidRuntime(13721): at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:462)
E/AndroidRuntime(13721): at java.util.concurrent.FutureTask.run(FutureTask.java:266)
E/AndroidRuntime(13721): at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:301)
E/AndroidRuntime(13721): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
E/AndroidRuntime(13721): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
E/AndroidRuntime(13721): at com.google.firebase.firestore.util.AsyncQueue$SynchronizedShutdownAwareExecutor$DelayedStartFactory.run(AsyncQueue.java:229)
E/AndroidRuntime(13721): at java.lang.Thread.run(Thread.java:923)
E/DartVM (13721): Exhausted heap space, trying to allocate 248992 bytes.
E/Dart (13721): ../../third_party/dart/runtime/vm/object.cc: 2588: error: Out of memory.
E/DartVM (13721): version=2.12.0-50.0.dev (dev) (Mon Nov 16 16:23:04 2020 -0800) on "android_ia32"
E/DartVM (13721): pid=13721, thread=13959, isolate_group=_spawn(0xf01d5a90), isolate=_spawn(0xe9f99a70)
E/DartVM (13721): isolate_instructions=c05a4600, vm_instructions=c05a4600
E/DartVM (13721): pc 0xc06cf9be fp 0xaa0fb4e8 /data/app/~~kmt9Q9_XJc8qao_sCSt-TQ==/com.nevercode.triage-hpmNQvNMjCystuibbdfQgA==/lib/x86/libflutter.so+0x180a9be
E/DartVM (13721): pc 0xc0954e11 fp 0xaa0fb508 /data/app/~~kmt9Q9_XJc8qao_sCSt-TQ==/com.nevercode.triage-hpmNQvNMjCystuibbdfQgA==/lib/x86/libflutter.so+0x1a8fe11
E/DartVM (13721): pc 0xc05a4797 fp 0xaa0fb538 /data/app/~~kmt9Q9_XJc8qao_sCSt-TQ==/com.nevercode.triage-hpmNQvNMjCystuibbdfQgA==/lib/x86/libflutter.so+0x16df797
E/DartVM (13721): pc 0xc064c6a0 fp 0xaa0fb588 /data/app/~~kmt9Q9_XJc8qao_sCSt-TQ==/com.nevercode.triage-hpmNQvNMjCystuibbdfQgA==/lib/x86/libflutter.so+0x17876a0
E/DartVM (13721): pc 0xc06a4b9a fp 0xaa0fb5d8 /data/app/~~kmt9Q9_XJc8qao_sCSt-TQ==/com.nevercode.triage-hpmNQvNMjCystuibbdfQgA==/lib/x86/libflutter.so+0x17dfb9a
E/DartVM (13721): pc 0xc088dbc5 fp 0xaa0fb628 /data/app/~~kmt9Q9_XJc8qao_sCSt-TQ==/com.nevercode.triage-hpmNQvNMjCystuibbdfQgA==/lib/x86/libflutter.so+0x19c8bc5
E/DartVM (13721): pc 0xc063cd95 fp 0xaa0fb6b8 /data/app/~~kmt9Q9_XJc8qao_sCSt-TQ==/com.nevercode.triage-hpmNQvNMjCystuibbdfQgA==/lib/x86/libflutter.so+0x1777d95
E/DartVM (13721): pc 0xc063bcbf fp 0xaa0fb778 /data/app/~~kmt9Q9_XJc8qao_sCSt-TQ==/com.nevercode.triage-hpmNQvNMjCystuibbdfQgA==/lib/x86/libflutter.so+0x1776cbf
E/DartVM (13721): pc 0xc063b647 fp 0xaa0fb7d8 /data/app/~~kmt9Q9_XJc8qao_sCSt-TQ==/com.nevercode.triage-hpmNQvNMjCystuibbdfQgA==/lib/x86/libflutter.so+0x1776647
E/DartVM (13721): pc 0xc063bdeb fp 0xaa0fbac8 /data/app/~~kmt9Q9_XJc8qao_sCSt-TQ==/com.nevercode.triage-hpmNQvNMjCystuibbdfQgA==/lib/x86/libflutter.so+0x1776deb
E/DartVM (13721): pc 0xc0953c49 fp 0xaa0fbb78 /data/app/~~kmt9Q9_XJc8qao_sCSt-TQ==/com.nevercode.triage-hpmNQvNMjCystuibbdfQgA==/lib/x86/libflutter.so+0x1a8ec49
E/DartVM (13721): pc 0xc0137a67 fp 0xaa0fbba8 /data/app/~~kmt9Q9_XJc8qao_sCSt-TQ==/com.nevercode.triage-hpmNQvNMjCystuibbdfQgA==/lib/x86/libflutter.so+0x1272a67
E/DartVM (13721): pc 0xc0137b62 fp 0xaa0fbc18 /data/app/~~kmt9Q9_XJc8qao_sCSt-TQ==/com.nevercode.triage-hpmNQvNMjCystuibbdfQgA==/lib/x86/libflutter.so+0x1272b62
I/flutter (13721): DateTime.now():
E/DartVM (13721): pc 0xc0139f02 fp 0xaa0fbc68 /data/app/~~kmt9Q9_XJc8qao_sCSt-TQ==/com.nevercode.triage-hpmNQvNMjCystuibbdfQgA==/lib/x86/libflutter.so+0x1274f02
E/DartVM (13721): pc 0xc00faaa2 fp 0xaa0fbc98 /data/app/~~kmt9Q9_XJc8qao_sCSt-TQ==/com.nevercode.triage-hpmNQvNMjCystuibbdfQgA==/lib/x86/libflutter.so+0x1235aa2
E/DartVM (13721): pc 0xc00fa9ff fp 0xaa0fbcc8 /data/app/~~kmt9Q9_XJc8qao_sCSt-TQ==/com.nevercode.triage-hpmNQvNMjCystuibbdfQgA==/lib/x86/libflutter.so+0x12359ff
E/DartVM (13721): pc 0xc0138b9e fp 0xaa0fbd18 /data/app/~~kmt9Q9_XJc8qao_sCSt-TQ==/com.nevercode.triage-hpmNQvNMjCystuibbdfQgA==/lib/x86/libflutter.so+0x1273b9e
E/DartVM (13721): pc 0xc0136bb5 fp 0xaa0fbd88 /data/app/~~kmt9Q9_XJc8qao_sCSt-TQ==/com.nevercode.triage-hpmNQvNMjCystuibbdfQgA==/lib/x86/libflutter.so+0x1271bb5
E/DartVM (13721): pc 0xc013867e fp 0xaa0fbfa8 /data/app/~~kmt9Q9_XJc8qao_sCSt-TQ==/com.nevercode.triage-hpmNQvNMjCystuibbdfQgA==/lib/x86/libflutter.so+0x127367e
E/DartVM (13721): pc 0xc05bb16b fp 0xaa0fc028 /data/app/~~kmt9Q9_XJc8qao_sCSt-TQ==/com.nevercode.triage-hpmNQvNMjCystuibbdfQgA==/lib/x86/libflutter.so+0x16f616b
E/DartVM (13721): pc 0xc05bb0f5 fp 0xaa0fc058 /data/app/~~kmt9Q9_XJc8qao_sCSt-TQ==/com.nevercode.triage-hpmNQvNMjCystuibbdfQgA==/lib/x86/libflutter.so+0x16f60f5
E/DartVM (13721): pc 0xc074923c fp 0xaa0fc0e8 /data/app/~~kmt9Q9_XJc8qao_sCSt-TQ==/com.nevercode.triage-hpmNQvNMjCystuibbdfQgA==/lib/x86/libflutter.so+0x188423c
E/DartVM (13721): pc 0xc074954a fp 0xaa0fc118 /data/app/~~kmt9Q9_XJc8qao_sCSt-TQ==/com.nevercode.triage-hpmNQvNMjCystuibbdfQgA==/lib/x86/libflutter.so+0x188454a
E/DartVM (13721): pc 0xc06cb7e6 fp 0xaa0fc178 /data/app/~~kmt9Q9_XJc8qao_sCSt-TQ==/com.nevercode.triage-hpmNQvNMjCystuibbdfQgA==/lib/x86/libflutter.so+0x18067e6
E/DartVM (13721): pc 0xee4f4975 fp 0xaa0fc198 /apex/com.android.runtime/lib/bionic/libc.so+0xe6975
E/DartVM (13721): pc 0xee486568 fp 0xaa0fc1c8 /apex/com.android.runtime/lib/bionic/libc.so+0x78568
E/DartVM (13721): -- End of DumpStackTrace
F/libc (13721): Fatal signal 6 (SIGABRT), code -1 (SI_QUEUE) in tid 13959 (DartWorker), pid 13721 (evercode.triage)
Lost connection to device.
This is also reproducible with a regular callback.
Minimal reproducible code sample
import 'dart:async';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
Future<void> main() async {
WidgetsFlutterBinding.ensureInitialized();
await Firebase.initializeApp();
runApp(MyApp());
}
class MyApp extends StatefulWidget {
@override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
Timer timer;
num i = 0;
@override
void initState() {
super.initState();
FirebaseFirestore.instance.collection('test').snapshots().listen((event) => print(event.docs[0].get("int")));
}
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text("DocumentReference example"),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
RaisedButton(
child: Text(timer == null ? "Start updating document" : "Stop"),
onPressed: () {
if (timer == null) {
setState(() {
timer = Timer.periodic(Duration(milliseconds: 100), (t) {
i++;
FirebaseFirestore.instance.collection('test').doc('testA').set({"int": i}).catchError((e) => print(e));
FirebaseFirestore.instance.collection('test').doc('testB').set({"int": i}).catchError((e) => print(e));
});
});
} else {
setState(() {
timer.cancel();
timer = null;
i = 0;
});
}
},
),
CircularProgressIndicator(),
],
),
),
),
);
}
}
Logs
W/libc (19208): pthread_create failed: couldn't allocate 1085440-bytes mapped space: Out of memory
W/evercode.triag(19208): Throwing OutOfMemoryError "pthread_create (1040KB stack) failed: Try again" (VmSize 4011424 kB)
E/AndroidRuntime(19208): FATAL EXCEPTION: main
E/AndroidRuntime(19208): Process: com.nevercode.triage, PID: 19208
E/AndroidRuntime(19208): java.lang.OutOfMemoryError: pthread_create (1040KB stack) failed: Try again
E/AndroidRuntime(19208): at java.lang.Thread.nativeCreate(Native Method)
E/AndroidRuntime(19208): at java.lang.Thread.start(Thread.java:887)
E/AndroidRuntime(19208): at java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:975)
E/AndroidRuntime(19208): at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1393)
E/AndroidRuntime(19208): at com.google.android.gms.tasks.Tasks.call(Unknown Source:14)
E/AndroidRuntime(19208): at io.flutter.plugins.firebase.firestore.FlutterFirebaseFirestorePlugin.documentSet(FlutterFirebaseFirestorePlugin.java:407)
E/AndroidRuntime(19208): at io.flutter.plugins.firebase.firestore.FlutterFirebaseFirestorePlugin.onMethodCall(FlutterFirebaseFirestorePlugin.java:537)
E/AndroidRuntime(19208): at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:233)
E/AndroidRuntime(19208): at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:85)
E/AndroidRuntime(19208): at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:735)
E/AndroidRuntime(19208): at android.os.MessageQueue.nativePollOnce(Native Method)
E/AndroidRuntime(19208): at android.os.MessageQueue.next(MessageQueue.java:335)
E/AndroidRuntime(19208): at android.os.Looper.loop(Looper.java:183)
E/AndroidRuntime(19208): at android.app.ActivityThread.main(ActivityThread.java:7656)
E/AndroidRuntime(19208): at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime(19208): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
E/AndroidRuntime(19208): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
I/Process (19208): Sending signal. PID: 19208 SIG: 9
Lost connection to device.
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Most helpful comment
This is also reproducible with a regular callback.
Minimal reproducible code sample
Logs