FlutterRealtime

Realtime Flutter SDK exception: Concurrent modification during iteration: _Map len:0.

May 23, 2024, 09:00

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memoonliteOriginal post

Rank 3: Container

May 23, 2024, 08:04

Hello everyone! I'd like to report a problem regarding the Realtime SDK on Flutter. Sometimes, but not always, an exception is thrown by the Realtime SDK after connecting:

Plain text

E/flutter ( 4989): #0      _CompactIterator.moveNext (dart:collection-patch/compact_hash.dart:714:7)
E/flutter ( 4989): #1      RealtimeMixin._createSocket.<anonymous closure> (package:appwrite/src/realtime_mixin.dart:91:49)
E/flutter ( 4989): #2      _RootZone.runGuarded (dart:async/zone.dart:1582:10)
E/flutter ( 4989): #3      _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:392:13)
E/flutter ( 4989): #4      _BufferingStreamSubscription._sendDone (dart:async/stream_impl.dart:402:7)
E/flutter ( 4989): #5      _BufferingStreamSubscription._close (dart:async/stream_impl.dart:291:7)
E/flutter ( 4989): #6      _ForwardingStream._handleDone (dart:async/stream_pipe.dart:99:10)
E/flutter ( 4989): #7      _ForwardingStreamSubscription._handleDone (dart:async/stream_pipe.dart:161:13)
E/flutter ( 4989): #8      _RootZone.runGuarded (dart:async/zone.dart:1582:10)
E/flutter ( 4989): #9      _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:392:13)
E/flutter ( 4989): #10     _BufferingStreamSubscription._sendDone (dart:async/stream_impl.dart:402:7)

(Exception continues in message below this post, because of Discord stupid message limit)

I'm using version 12.0.3 of the Appwrite SDK. Does anyone know what could cause this problem?

Summary

Developers are encountering a Concurrent modification during iteration error with the Realtime SDK on Flutter. The issue seems to arise inconsistently after connecting, with stack traces indicating modification during iteration. This problem has been noted using Appwrite SDK version 12.0.3. No specific solutions were provided in the thread.

memoonlite

Rank 3: Container

May 23, 2024, 08:04

Exception continues:

Plain text

E/flutter ( 4989): #12     _SyncStreamControllerDispatch._sendDone (dart:async/stream_controller.dart:792:19)
E/flutter ( 4989): #13     _StreamController._closeUnchecked (dart:async/stream_controller.dart:647:7)
E/flutter ( 4989): #14     _StreamController.close (dart:async/stream_controller.dart:640:5)
E/flutter ( 4989): #15     new _WebSocketImpl._fromSocket.<anonymous closure> (dart:_http/websocket_impl.dart:1156:19)
E/flutter ( 4989): #16     _RootZone.runBinaryGuarded (dart:async/zone.dart:1606:10)
E/flutter ( 4989): #17     _BufferingStreamSubscription._sendError.sendError (dart:async/stream_impl.dart:358:15)
E/flutter ( 4989): #18     _BufferingStreamSubscription._sendError (dart:async/stream_impl.dart:373:9)
E/flutter ( 4989): #19     _BufferingStreamSubscription._addError (dart:async/stream_impl.dart:280:7)
E/flutter ( 4989): #20     _SinkTransformerStreamSubscription._addError (dart:async/stream_transformers.dart:75:11)
E/flutter ( 4989): #21     _SinkTransformerStreamSubscription._handleData (dart:async/stream_transformers.dart:113:7)
E/flutter ( 4989): #22     _HttpDetachedStreamSubscription._maybeScheduleData.<anonymous closure> (dart:_http/http_parser.dart:173:20)
E/flutter ( 4989): #23     _microtaskLoop (dart:async/schedule_microtask.dart:40:21)
E/flutter ( 4989): #24     _startMicrotaskLoop (dart:async/schedule_microtask.dart:49:5)
E/flutter ( 4989): ```

Realtime Flutter SDK exception: Concurrent modification during iteration: _Map len:0.

Need support?_