Always needs to debug and run flutter app timeout error

Question

I have created simple flutter app with images and animations,

It runs very smoothly when I debug and run app using 'flutter run' command

But when I try to hot reload, it timeout with below error list and I always need to redebug flutter app and run It again.

Initializing hot reload...
Syncing files to device Redmi Note 4...
TimeoutException: Request to Dart VM Service timed out: 
ext.flutter.evict({value
: AssetManifest.json, isolateId: isolates/428680573})
#0      VM.invokeRpcRaw (package:flutter_tools/src/vmservice.dart:741)
<asynchronous suspension>
#1      Isolate.invokeRpcRaw 
(package:flutter_tools/src/vmservice.dart:998)
#2      Isolate.invokeFlutterExtensionRpcRaw 
(package:flutter_tools/src/vmservic
e.dart:1127)
<asynchronous suspension>
#3      Isolate.flutterEvictAsset 
(package:flutter_tools/src/vmservice.dart:1204
)
<asynchronous suspension>
#4      HotRunner._evictDirtyAssets 
(package:flutter_tools/src/run_hot.dart:302)

<asynchronous suspension>
#5      HotRunner._reloadSources 
(package:flutter_tools/src/run_hot.dart:615)
<asynchronous suspension>
#6      HotRunner.restart (package:flutter_tools/src/run_hot.dart:457)
<asynchronous suspension>
#7      HotRunner.handleTerminalCommand 
(package:flutter_tools/src/run_hot.dart:
236)
<asynchronous suspension>
#8      ResidentRunner.processTerminalInput 
(package:flutter_tools/src/resident_
runner.dart:740)
<asynchronous suspension>
#9      _rootRunUnary (dart:async/zone.dart:1134)
#10     _CustomZone.runUnary (dart:async/zone.dart:1031)
#11     _CustomZone.runUnaryGuarded (dart:async/zone.dart:933)
#12     _BufferingStreamSubscription._sendData 
(dart:async/stream_impl.dart:330)

#13     _BufferingStreamSubscription._add 
(dart:async/stream_impl.dart:257)
#14     _SyncBroadcastStreamController._sendData 
(dart:async/broadcast_stream_co
ntroller.dart:379)
#15     _BroadcastStreamController.add 
(dart:async/broadcast_stream_controller.d
art:254)
#16     _AsBroadcastStreamController.add 
(dart:async/broadcast_stream_controller
.dart:480)
#17     _rootRunUnary (dart:async/zone.dart:1134)
#18     _CustomZone.runUnary (dart:async/zone.dart:1031)
#19     _CustomZone.runUnaryGuarded (dart:async/zone.dart:933)
#20     _BufferingStreamSubscription._sendData 
(dart:async/stream_impl.dart:330)

#21     _BufferingStreamSubscription._add 
(dart:async/stream_impl.dart:257)
#22     _SinkTransformerStreamSubscription._add 
(dart:async/stream_transformers.
dart:68)
#23     _EventSinkWrapper.add (dart:async/stream_transformers.dart:15)
#24     _StringAdapterSink.add (dart:convert/string_conversion.dart:268)
#25     _SimpleAsciiDecoderSink.add (dart:convert/ascii.dart:298)
#26     _ConverterStreamEventSink.add 
(dart:convert/chunked_conversion.dart:86)
#27     _SinkTransformerStreamSubscription._handleData 
(dart:async/stream_transf
ormers.dart:120)
#28     _rootRunUnary (dart:async/zone.dart:1134)
#29     _CustomZone.runUnary (dart:async/zone.dart:1031)
#30     _CustomZone.runUnaryGuarded (dart:async/zone.dart:933)
#31     _BufferingStreamSubscription._sendData 
(dart:async/stream_impl.dart:330)

#32     _BufferingStreamSubscription._add 
(dart:async/stream_impl.dart:257)
#33     _StreamController&&_SyncStreamControllerDispatch._sendData 
(dart:async/s
tream_controller.dart:763)
#34     _StreamController._add (dart:async/stream_controller.dart:639)
#35     _StreamController.add (dart:async/stream_controller.dart:585)
#36     _Socket._onData (dart:io-patch/socket_patch.dart:1654)
#37     _rootRunUnary (dart:async/zone.dart:1138)
#38     _CustomZone.runUnary (dart:async/zone.dart:1031)
#39     _CustomZone.runUnaryGuarded (dart:async/zone.dart:933)
#40     _BufferingStreamSubscription._sendData 
(dart:async/stream_impl.dart:330)
#41     _BufferingStreamSubscription._add 
(dart:async/stream_impl.dart:257)
#42     _StreamController&&_SyncStreamControllerDispatch._sendData 
(dart:async/s
tream_controller.dart:763)
#43     _StreamController._add (dart:async/stream_controller.dart:639)
#44     _StreamController.add (dart:async/stream_controller.dart:585)
#45     new _RawSocket.<anonymous closure> (dart:io-
patch/socket_patch.dart:1231
)
#46     _NativeSocket.issueReadEvent.issue (dart:io-
patch/socket_patch.dart:784)

#47     _microtaskLoop (dart:async/schedule_microtask.dart:41)
#48     _startMicrotaskLoop (dart:async/schedule_microtask.dart:50)
#49     _runPendingImmediateCallback (dart:isolate-
patch/dart:isolate/isolate_pa
tch.dart:113)
#50     _RawReceivePortImpl._handleMessage (dart:isolate-
patch/dart:isolate/isol
ate_patch.dart:166)

Application finished.

This error is not showing detail about where it is occuring.

If it is problem with loading image asset, I've added images in images directory in root folder, and also given asset links in pubspec.yaml file

Images are displaying well now while I run app but app refused to hot restart or hot reload.

I tried reinstall Flutter SDK and also tried in other project samples, hot reload works well in other projects.

Answer 1

Okay I found the issue, It was problem with the timer class I was using for splash screen,

I didn't use async with calling method that use Duration and Timer Class and it runs on main thread,

It was working well without async but it also created issue for hot reload as it was not running on background.