FlutterRealtime

Flutter Realtime: Concurrent Modification during iteration

Apr 29, 2024, 02:00

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Mosh OntongOriginal post

Quality

Apr 29, 2024, 01:26

#0  _CompactIterator.moveNext (dart:collection-patch/compact_hash.dart:714:7)
#1  RealtimeMixin._createSocket.<anonymous closure> (package:appwrite/src/realtime_mixin.dart:91:49)
#2  _RootZone.runGuarded (dart:async/zone.dart:1582:10)
#3  _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:392:13)
#4  _BufferingStreamSubscription._sendDone (dart:async/stream_impl.dart:402:7)
#5  _BufferingStreamSubscription._close (dart:async/stream_impl.dart:291:7)
#6  _ForwardingStream._handleDone (dart:async/stream_pipe.dart:99:10)
#7  _ForwardingStreamSubscription._handleDone (dart:async/stream_pipe.dart:161:13)
#8      _RootZone.runGuarded (dart:async/zone.dart:1582:10)
#9      _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:392:13)

Summary

Developers are experiencing a Concurrent Modification error while using the latest Appwrite Flutter SDK for Realtime. The issue is occurring during socket creation and stream handling, resulting in errors related to stream subscription and WebSocket closure. The error likely stems from iteration conflicts in the code, possibly in the RealtimeMixin file. Solution: Review the RealtimeMixin.dart file around line 91 to ensure proper handling of stream iteration and modifications during socket creation. Consider restructuring the code to prevent concurrent modifications during iteration to resolve the issue.

Mosh Ontong

Quality

Apr 29, 2024, 01:26

#10     _BufferingStreamSubscription._sendDone (dart:async/stream_impl.dart:402:7)
#11     _BufferingStreamSubscription._close (dart:async/stream_impl.dart:291:7)
#12     _SyncStreamControllerDispatch._sendDone (dart:async/stream_controller.dart:792:19)
#13     _StreamController._closeUnchecked (dart:async/stream_controller.dart:647:7)
#14     _StreamController.close (dart:async/stream_controller.dart:640:5)
#15     new _WebSocketImpl._fromSocket.<anonymous closure> (dart:_http/websocket_impl.dart:1171:19)
#16     _RootZone.runGuarded (dart:async/zone.dart:1582:10)
#17     _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:392:13)
#18     _BufferingStreamSubscription._sendDone (dart:async/stream_impl.dart:402:7)
#19     _BufferingStreamSubscription._close (dart:async/stream_impl.dart:291:7)
#20     _SinkTransformerStreamSubscription._close (dart:async/stream_transformers.dart:87:11)
#21     _EventSinkWrapper.close (dart:async/stream_transformers.dart:21:11)
#22     _WebSocketProtocolTransformer.close (dart:_http/websocket_impl.dart:118:17)

Mosh Ontong

Quality

Apr 29, 2024, 01:26

#23     _SinkTransformerStreamSubscription._handleDone (dart:async/stream_transformers.dart:132:24)
#24     _RootZone.runGuarded (dart:async/zone.dart:1582:10)
#25     _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:392:13)
#26     _BufferingStreamSubscription._sendDone (dart:async/stream_impl.dart:402:7)
#27     _BufferingStreamSubscription._close (dart:async/stream_impl.dart:291:7)
#28     _SyncStreamControllerDispatch._sendDone (dart:async/stream_controller.dart:792:19)
#29     _StreamController._closeUnchecked (dart:async/stream_controller.dart:647:7)
#30     _StreamController.close (dart:async/stream_controller.dart:640:5)
#31     _Socket._onData (dart:io-patch/socket_patch.dart:2454:21)
#32     _RootZone.runUnaryGuarded (dart:async/zone.dart:1594:10)
#33     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:339:11)
#34     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)
#35     _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:784:19)
#36     _StreamController._add (dart:async/stream_controller.dart:658:7)
#37     _StreamController.add (dart:async/stream_controller.dart:606:5)
#38     _RawSecureSocket._closeHandler (dart:io/secure_socket.dart:899:21)
#39     _RawSecureSocket._tryFilter (dart:io/secure_socket.dart:1029:11)<asynchronous suspension>

Mosh Ontong

Quality

Apr 29, 2024, 01:27

For more information: I am using the latest sdk of appwrite flutter

Mosh Ontong

Quality

Apr 29, 2024, 01:28

#1  RealtimeMixin._createSocket.<anonymous closure> (package:appwrite/src/realtime_mixin.dart:91:49)

Flutter Realtime: Concurrent Modification during iteration

Need support?_