SocketException: Reading from a closed socket

[huangsir0]

Steps to Reproduce

I don't know how to reproduce this SocketException，it suddenly report an error during the application.

flutter doctor

[✓] Flutter (Channel stable, 2.2.0, on macOS 11.2.3 20D91 darwin-x64, locale zh-Hans-CN)
    • Flutter version 2.2.0 at /Users/huangsir/flutter-2.0.6/flutter
    • Framework revision b22742018b (3 months ago), 2021-05-14 19:12:57 -0700
    • Engine revision a9d88a4d18
    • Dart version 2.13.0
    • Pub download mirror https://pub.flutter-io.cn
    • Flutter download mirror https://storage.flutter-io.cn

error stack

flutter: content: Caught error: SocketException: Reading from a closed socket
flutter: content: #0      _RawSecureSocket.read (dart:io/secure_socket.dart:662:7)
dart-lang/http#1      _Socket._onData (dart:io-patch/socket_patch.dart:2159:28)
dart-lang/http#2      _rootRunUnary (dart:async/zone.dart:1362:47)
dart-lang/http#3      _CustomZone.runUnary (dart:async/zone.dart:1265:19)
dart-lang/http#4      _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)
dart-lang/http#5      _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)
dart-lang/http#6      _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)
dart-lang/http#7      _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:733:19)
dart-lang/http#8      _StreamController._add (dart:async/stream_controller.dart:607:7)
dart-lang/http#9      _StreamController.add (dart:async/stream_controller.dart:554:5)
dart-lang/http#10     _RawSecureSocket._sendReadEvent (dart:io/secure_socket.dart:991:19)
dart-lang/http#11     _rootRun (dart:async/zone.dart:1346:47)
dart-lang/http#12     _CustomZone.run (dart:async/zone.dart:1258:19)
dart-lang/http#13     _CustomZone.runGuarded (dart:async/zone.dart:1162:7)
dart-lang/http#14     _CustomZone.bindCallbackGuarded.<an<…>

[alaatm]

I am having similar crash reports:

SocketException: Reading from a closed socket

[
  "_RawSecureSocket.read (dart:io/secure_socket.dart:770)",
  "_Socket._onData (dart:io-patch/socket_patch.dart:2323)",
  "_RootZone.runUnaryGuarded (dart:async/zone.dart:1586)",
  "_BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:339)",
  "_BufferingStreamSubscription._add (dart:async/stream_impl.dart:271)",
  "_SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:774)",
  "_StreamController._add (dart:async/stream_controller.dart:648)",
  "_StreamController.add (dart:async/stream_controller.dart:596)",
  "_RawSecureSocket._sendReadEvent (dart:io/secure_socket.dart:1107)",
  "Timer._createTimer.<anonymous closure> (dart:async-patch/timer_patch.dart:18)",
  "_Timer._runTimers (dart:isolate-patch/timer_impl.dart:398)",
  "_Timer._handleMessage (dart:isolate-patch/timer_impl.dart:429)",
  "_RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:192)"
]

I am unable to reproduce this as well, this crash is reported from some devices and the app state is always in the paused state when this happens. It happens after interacting with a chat page (using sockets with signalR client) then minimizing the app.

[JimmyHuang454]

Same thing happens to me too. This crash really confuse me, It seem this crash comes from .../io/secure_socket.dart, when a TLS socket closed, it raw socket keep sending data to TLS handler, then tigger this crash.

[a-siva]

Bumping priority as folks seem to run into this frequently

[a-siva]

//cc @brianquinlan

[bagedevimo]

Happy to have a go at a fix for this, if it's on the less-tricky side of hard. My suggestion in #52210 was to change from a exception to returning nil, like the other conditional checks in that method (a few lines below).

If someone can provide a steer on writing a test and/or a fix, very happy to have a go.

[a-siva]

I was looking at adding the suggested fix, I am in the process of trying to add a regression test that will work with our test harness.

[afl-dev]

up

[ZaneCode6574]

I met this problem too. Have no idea.