[bug] Disconnection is impossible at connectivity lost #799
Description
Describe the bug
Given a correct flow of connection to a room and publication of audio and video tracks, if the connection is lost and at that moment the disconnect action to the room is invoked with room.disconnect(), the room will be blocked indefinitely with no possibility of disconnection, whether or not the Internet connection is reestablished.
To Reproduce
Occurs on disconnection attempt flow after loss of internet connection, can be verified using the sample app included with the library.
Expected behavior
It is a very common scenario that, given the loss of connectivity, it is desired to close and terminate the communication; this should be possible at any time, whether or not there is Internet connectivity; however, this bug presents a scenario in which the room will remain permanently active and without the possibility of closing it properly.
Platform information
- Flutter version: Flutter version 3.29.2 on channel stable
- Plugin version: 2.4.7
- Flutter target OS: Android
- Flutter target OS version: 14
- Flutter console log:
The Log shows a loss of connectivity and two consecutive attempts to disconnect from the room:
2025-06-03 17:41:23.375 7886-8484 org.webrtc.Logging io.livekit.example I EglRenderer: Duration: 4004 ms. Frames received: 34. Dropped: 0. Rendered: 34. Render fps: 8.5. Average render time: 6826 us. Average swapBuffer time: 8640 us.
2025-06-03 17:41:23.538 7886-7912 libEGL io.livekit.example E called unimplemented OpenGL ES API
2025-06-03 17:41:23.576 7886-7975 org.webrtc.Logging io.livekit.example I EglRenderer: Duration: 4010 ms. Frames received: 34. Dropped: 0. Rendered: 34. Render fps: 8.5. Average render time: 1240 us. Average swapBuffer time: 11136 us.
2025-06-03 17:41:24.417 7886-8013 org.webrtc.Logging io.livekit.example I NetworkMonitorAutoDetect: Network handle: 450082295821, 104 is disconnected
2025-06-03 17:41:24.456 7886-7886 org.webrtc.Logging io.livekit.example I NetworkMonitorAutoDetect: Network connectivity changed, type is: CONNECTION_NONE
2025-06-03 17:41:24.557 7886-7912 libEGL io.livekit.example E called unimplemented OpenGL ES API
2025-06-03 17:41:24.931 7886-7886 flutter io.livekit.example I 15:41:24: lost connectivity
2025-06-03 17:41:24.931 7886-7886 flutter io.livekit.example I 15:41:24: lost connectivity
2025-06-03 17:41:24.932 7886-7886 flutter io.livekit.example I 15:41:24: [SignalEvent] Instance of 'SignalConnectivityChangedEvent'
2025-06-03 17:41:24.933 7886-7886 flutter io.livekit.example I 15:41:24: [SignalEvent] Instance of 'SignalConnectivityChangedEvent'
2025-06-03 17:41:25.152 7886-7960 org.webrtc.Logging io.livekit.example I CameraStatistics: Camera fps: 9.
2025-06-03 17:41:25.564 7886-7912 libEGL io.livekit.example E called unimplemented OpenGL ES API
2025-06-03 17:41:26.573 7886-7912 libEGL io.livekit.example E called unimplemented OpenGL ES API
2025-06-03 17:41:27.157 7886-7960 org.webrtc.Logging io.livekit.example I CameraStatistics: Camera fps: 9.
2025-06-03 17:41:27.379 7886-8484 org.webrtc.Logging io.livekit.example I EglRenderer: Duration: 4003 ms. Frames received: 34. Dropped: 0. Rendered: 34. Render fps: 8.5. Average render time: 9451 us. Average swapBuffer time: 7543 us.
2025-06-03 17:41:27.600 7886-7912 libEGL io.livekit.example E called unimplemented OpenGL ES API
2025-06-03 17:41:27.639 7886-7975 org.webrtc.Logging io.livekit.example I EglRenderer: Duration: 4063 ms. Frames received: 34. Dropped: 0. Rendered: 34. Render fps: 8.4. Average render time: 1838 us. Average swapBuffer time: 12034 us.
2025-06-03 17:41:28.608 7886-7912 libEGL io.livekit.example E called unimplemented OpenGL ES API
2025-06-03 17:41:29.158 7886-7960 org.webrtc.Logging io.livekit.example I CameraStatistics: Camera fps: 9.
2025-06-03 17:41:29.280 7886-7886 flutter io.livekit.example I 15:41:29: [EngineEvent] Engine#1068919483 Instance of 'EngineClosingEvent'
2025-06-03 17:41:29.623 7886-7912 libEGL io.livekit.example E called unimplemented OpenGL ES API
2025-06-03 17:41:30.623 7886-7912 libEGL io.livekit.example E called unimplemented OpenGL ES API
2025-06-03 17:41:30.946 7886-7956 FlutterWebRTCPlugin io.livekit.example D onConnectionChangeDISCONNECTED
2025-06-03 17:41:30.947 7886-7886 flutter io.livekit.example I 15:41:30: subscriber iceConnectionState: RTCIceConnectionState.RTCIceConnectionStateDisconnected
2025-06-03 17:41:30.948 7886-7886 flutter io.livekit.example I 15:41:30: subscriber connectionState: RTCPeerConnectionState.RTCPeerConnectionStateDisconnected
2025-06-03 17:41:30.949 7886-7886 flutter io.livekit.example I 15:41:30: handleDisconnect: engine is closed, skip
2025-06-03 17:41:30.949 7886-7886 flutter io.livekit.example I 15:41:30: [EngineEvent] Engine#1068919483 EngineSubscriberPeerStateUpdatedEvent(state: RTCPeerConnectionState.RTCPeerConnectionStateDisconnected, isPrimary: true)
2025-06-03 17:41:31.102 7886-7956 FlutterWebRTCPlugin io.livekit.example D onConnectionChangeDISCONNECTED
2025-06-03 17:41:31.103 7886-7886 flutter io.livekit.example I 15:41:31: publisher iceConnectionState: RTCIceConnectionState.RTCIceConnectionStateDisconnected
2025-06-03 17:41:31.107 7886-7886 flutter io.livekit.example I 15:41:31: publisher connectionState: RTCPeerConnectionState.RTCPeerConnectionStateDisconnected
2025-06-03 17:41:31.110 7886-7886 flutter io.livekit.example I 15:41:31: handleDisconnect: engine is closed, skip
2025-06-03 17:41:31.111 7886-7886 flutter io.livekit.example I 15:41:31: [EngineEvent] Engine#1068919483 EnginePublisherPeerStateUpdatedEvent(state: RTCPeerConnectionState.RTCPeerConnectionStateDisconnected, isPrimary: false)
2025-06-03 17:41:31.159 7886-7960 org.webrtc.Logging io.livekit.example I CameraStatistics: Camera fps: 9.
2025-06-03 17:41:31.381 7886-8484 org.webrtc.Logging io.livekit.example I EglRenderer: Duration: 4002 ms. Frames received: 34. Dropped: 0. Rendered: 34. Render fps: 8.5. Average render time: 6589 us. Average swapBuffer time: 9363 us.
2025-06-03 17:41:31.637 7886-7912 libEGL io.livekit.example E called unimplemented OpenGL ES API
2025-06-03 17:41:31.648 7886-7975 org.webrtc.Logging io.livekit.example I EglRenderer: Duration: 4009 ms. Frames received: 34. Dropped: 0. Rendered: 34. Render fps: 8.5. Average render time: 2244 us. Average swapBuffer time: 10911 us.
2025-06-03 17:41:32.645 7886-7912 libEGL io.livekit.example E called unimplemented OpenGL ES API
2025-06-03 17:41:33.161 7886-7960 org.webrtc.Logging io.livekit.example I CameraStatistics: Camera fps: 9.
2025-06-03 17:41:33.658 7886-7912 libEGL io.livekit.example E called unimplemented OpenGL ES API
2025-06-03 17:41:34.670 7886-7912 libEGL io.livekit.example E called unimplemented OpenGL ES API
2025-06-03 17:41:35.119 7886-7886 flutter io.livekit.example I 15:41:35: ping timeout
2025-06-03 17:41:35.120 7886-7886 flutter io.livekit.example I 15:41:35: SignalClient did disconnect ConnectionState.connected
2025-06-03 17:41:35.122 7886-7886 flutter io.livekit.example I 15:41:35: [SignalEvent] Instance of 'SignalDisconnectedEvent'
2025-06-03 17:41:35.124 7886-7886 flutter io.livekit.example I 15:41:35: Signal disconnected DisconnectReason.disconnected
2025-06-03 17:41:35.162 7886-7960 org.webrtc.Logging io.livekit.example I CameraStatistics: Camera fps: 9.
2025-06-03 17:41:35.384 7886-8484 org.webrtc.Logging io.livekit.example I EglRenderer: Duration: 4002 ms. Frames received: 33. Dropped: 0. Rendered: 33. Render fps: 8.2. Average render time: 3577 us. Average swapBuffer time: 3888 us.
2025-06-03 17:41:35.650 7886-7975 org.webrtc.Logging io.livekit.example I EglRenderer: Duration: 4002 ms. Frames received: 34. Dropped: 0. Rendered: 34. Render fps: 8.5. Average render time: 1314 us. Average swapBuffer time: 6529 us.
2025-06-03 17:41:35.677 7886-7912 libEGL io.livekit.example E called unimplemented OpenGL ES API
2025-06-03 17:41:36.686 7886-7912 libEGL io.livekit.example E called unimplemented OpenGL ES API
2025-06-03 17:41:37.164 7886-7960 org.webrtc.Logging io.livekit.example I CameraStatistics: Camera fps: 9.
2025-06-03 17:41:37.689 7886-7912 libEGL io.livekit.example E called unimplemented OpenGL ES API
2025-06-03 17:41:38.690 7886-7912 libEGL io.livekit.example E called unimplemented OpenGL ES API
2025-06-03 17:41:39.165 7886-7960 org.webrtc.Logging io.livekit.example I CameraStatistics: Camera fps: 9.
2025-06-03 17:41:39.286 7886-7886 flutter io.livekit.example I 15:41:39: EventsListener<EngineEvent>#971132859 event was cancelled by func
2025-06-03 17:41:39.289 7886-7886 flutter io.livekit.example E [ERROR:flutter/runtime/dart_vm_initializer.cc(40)] Unhandled Exception: LiveKit Exception: [TimeoutException] Timeout
#0 EventsListenable.waitFor.<anonymous closure> (package:livekit_client/src/managers/event.dart:214:39)
#1 _RootZone.run (dart:async/zone.dart:1843:54)
#2 Future.timeout.<anonymous closure> (dart:async/future_impl.dart:1036:34)
<asynchronous suspension>
#3 EventsListenable.waitFor (package:livekit_client/src/managers/event.dart:212:14)
<asynchronous suspension>
#4 Room.disconnect (package:livekit_client/src/core/room.dart:631:5)
<asynchronous suspension>
#5 _ControlsWidgetState._onTapDisconnect (package:livekit_example/widgets/controls.dart:216:25)
<asynchronous suspension>
2025-06-03 17:41:39.389 7886-8484 org.webrtc.Logging io.livekit.example I EglRenderer: Duration: 4004 ms. Frames received: 34. Dropped: 0. Rendered: 34. Render fps: 8.5. Average render time: 2817 us. Average swapBuffer time: 4341 us.
2025-06-03 17:41:39.653 7886-7975 org.webrtc.Logging io.livekit.example I EglRenderer: Duration: 4002 ms. Frames received: 34. Dropped: 0. Rendered: 34. Render fps: 8.5. Average render time: 1321 us. Average swapBuffer time: 3675 us.
2025-06-03 17:41:39.710 7886-7912 libEGL io.livekit.example E called unimplemented OpenGL ES API
2025-06-03 17:41:40.065 7886-7886 flutter io.livekit.example I 15:41:40: [SignalClient#501094614] Could not send message, socket not connected
2025-06-03 17:41:40.724 7886-7912 libEGL io.livekit.example E called unimplemented OpenGL ES API
2025-06-03 17:41:41.173 7886-7960 org.webrtc.Logging io.livekit.example I CameraStatistics: Camera fps: 9.
2025-06-03 17:41:41.740 7886-7912 libEGL io.livekit.example E called unimplemented OpenGL ES API
2025-06-03 17:41:42.755 7886-7912 libEGL io.livekit.example E called unimplemented OpenGL ES API
2025-06-03 17:41:43.176 7886-7960 org.webrtc.Logging io.livekit.example I CameraStatistics: Camera fps: 8.
2025-06-03 17:41:43.392 7886-8484 org.webrtc.Logging io.livekit.example I EglRenderer: Duration: 4004 ms. Frames received: 34. Dropped: 0. Rendered: 34. Render fps: 8.5. Average render time: 3300 us. Average swapBuffer time: 2894 us.
2025-06-03 17:41:43.658 7886-7975 org.webrtc.Logging io.livekit.example I EglRenderer: Duration: 4004 ms. Frames received: 33. Dropped: 0. Rendered: 33. Render fps: 8.2. Average render time: 1092 us. Average swapBuffer time: 4098 us.
2025-06-03 17:41:43.756 7886-7912 libEGL io.livekit.example E called unimplemented OpenGL ES API
2025-06-03 17:41:44.759 7886-7912 libEGL io.livekit.example E called unimplemented OpenGL ES API
2025-06-03 17:41:45.071 7886-7886 flutter io.livekit.example I 15:41:45: [SignalClient#501094614] Could not send message, socket not connected
2025-06-03 17:41:45.177 7886-7960 org.webrtc.Logging io.livekit.example I CameraStatistics: Camera fps: 9.
2025-06-03 17:41:45.774 7886-7912 libEGL io.livekit.example E called unimplemented OpenGL ES API
2025-06-03 17:41:45.957 7886-7886 flutter io.livekit.example I 15:41:45: Engine is already closed
2025-06-03 17:41:46.809 7886-7912 libEGL io.livekit.example E called unimplemented OpenGL ES API
2025-06-03 17:41:47.178 7886-7960 org.webrtc.Logging io.livekit.example I CameraStatistics: Camera fps: 9.
2025-06-03 17:41:47.395 7886-8484 org.webrtc.Logging io.livekit.example I EglRenderer: Duration: 4002 ms. Frames received: 34. Dropped: 0. Rendered: 34. Render fps: 8.5. Average render time: 6656 us. Average swapBuffer time: 4639 us.
2025-06-03 17:41:47.660 7886-7975 org.webrtc.Logging io.livekit.example I EglRenderer: Duration: 4001 ms. Frames received: 34. Dropped: 0. Rendered: 34. Render fps: 8.5. Average render time: 1305 us. Average swapBuffer time: 7158 us.
2025-06-03 17:41:47.822 7886-7912 libEGL io.livekit.example E called unimplemented OpenGL ES API