[web] OS Error: Connection refused connecting to Chrome debug port when launching from VS Code

[bsutton]

I've have a small project I'm using to develop/test a widget.

https://github.com/bsutton/minicard

I'm using the flutter beta channel and running the project as a flutter web app.

If I run the project from the cli it runs fine, chrome starts and I can run the app and do hot reloads.

If I try to run it from vscode I get the following error:

Launching lib/main.dart on Chrome in debug mode...
Unable to connect to Chrome debug port: 37523
 SocketException: OS Error: Connection refused, errno = 111, address = localhost, port = 46082
Exited (sigterm)

Running from the cli

flutter run -d chrome
Launching lib/main.dart on Chrome in debug mode...
Building application for the web...                                 8.6s
Attempting to connect to browser instance..                         2.2s

Warning: Flutter's support for web development is not stable yet and hasn't
been thoroughly tested in production environments.
For more information see https://flutter.dev/web

🔥  To hot restart changes while running, press "r". To hot restart (and refresh the browser), press "R".
For a more detailed help message, press "h". To quit, press "q".
Debug service listening on ws://127.0.0.1:36553/-CtK986JrCQ=

flutter doctor -v
[✓] Flutter (Channel beta, v1.12.13+hotfix.6, on Linux, locale en_AU.UTF-8)
    • Flutter version 1.12.13+hotfix.6 at /home/bsutton/apps/flutter
    • Framework revision 18cd7a3601 (4 weeks ago), 2019-12-11 06:35:39 -0800
    • Engine revision 2994f7e1e6
    • Dart version 2.7.0

 
[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
    • Android SDK at /home/bsutton/Android/Sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-29, build-tools 29.0.2
    • Java binary at: /home/bsutton/apps/android-studio/jre/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
    • All Android licenses accepted.

[✓] Chrome - develop for the web
    • Chrome at google-chrome

[✓] Android Studio (version 3.5)
    • Android Studio at /home/bsutton/apps/android-studio
    • Flutter plugin version 40.2.2
    • Dart plugin version 191.8423
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)

[✓] IntelliJ IDEA Community Edition (version 2018.3)
    • IntelliJ at /home/bsutton/apps/intellij/idea-IC-183.5912.21
    • Flutter plugin version 37.0.1
    • Dart plugin version 183.6270

[✓] Connected device (2 available)
    • Chrome     • chrome     • web-javascript • Google Chrome 79.0.3945.88
    • Web Server • web-server • web-javascript • Flutter Tools

• No issues found!

vs code details

Version: 1.41.1
Commit: 26076a4de974ead31f97692a0d32f90d735645c0
Date: 2019-12-18T15:04:31.999Z
Electron: 6.1.5
Chrome: 76.0.3809.146
Node.js: 12.4.0
V8: 7.6.303.31-electron.0
OS: Linux x64 5.3.0-26-generic snap

[iapicca]

Hi @bsutton
can you please provide your flutter run -d chrome --verbose?
Thank you

[bsutton]

logs

flutter run -d chrome --verbose
[  +15 ms] executing: [/home/bsutton/apps/flutter/] git -c log.showSignature=false log -n 1
--pretty=format:%H
[  +25 ms] Exit code 0 from: git -c log.showSignature=false log -n 1 --pretty=format:%H
[        ] 18cd7a3601bcffb36fdf2f679f763b5e827c2e8e
[        ] executing: [/home/bsutton/apps/flutter/] git describe --match v*.*.* --first-parent --long
--tags
[   +5 ms] Exit code 0 from: git describe --match v*.*.* --first-parent --long --tags
[        ] v1.12.13+hotfix.6-0-g18cd7a360
[   +5 ms] executing: [/home/bsutton/apps/flutter/] git rev-parse --abbrev-ref --symbolic @{u}
[   +5 ms] Exit code 0 from: git rev-parse --abbrev-ref --symbolic @{u}
[        ] origin/beta
[        ] executing: [/home/bsutton/apps/flutter/] git ls-remote --get-url origin
[   +4 ms] Exit code 0 from: git ls-remote --get-url origin
[        ] https://github.com/flutter/flutter.git
[  +39 ms] executing: [/home/bsutton/apps/flutter/] git rev-parse --abbrev-ref HEAD
[   +6 ms] Exit code 0 from: git rev-parse --abbrev-ref HEAD
[        ] beta
[  +67 ms] executing: /home/bsutton/Android/Sdk/platform-tools/adb devices -l
[  +11 ms] Exit code 0 from: /home/bsutton/Android/Sdk/platform-tools/adb devices -l
[        ] List of devices attached
           emulator-5554          device product:sdk_gphone_x86 model:Android_SDK_built_for_x86
           device:generic_x86 transport_id:1
[  +20 ms] Artifact Instance of 'AndroidMavenArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'AndroidGenSnapshotArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'AndroidInternalBuildArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'IOSEngineArtifacts' is not required, skipping update.
[   +2 ms] Artifact Instance of 'WindowsEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'MacOSEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'LinuxEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'LinuxFuchsiaSDKArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'MacOSFuchsiaSDKArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'FlutterRunnerSDKArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'FlutterRunnerDebugSymbols' is not required, skipping update.
[ +103 ms] Generating
/home/bsutton/git/minicard/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
[ +105 ms] Launching lib/main.dart on Chrome in debug mode...
[        ] Building application for the web...
[+6550 ms] Daemon is already running.
[  +92 ms] Serving DevTools at http://127.0.0.1:38235

[ +380 ms] About to build [web]...
[   +3 ms] Running build...
[  +55 ms] Running build completed, took 19ms

[        ] Caching finalized dependency graph...
[        ] Caching finalized dependency graph completed, took 43ms

[        ] Succeeded after 64ms with 0 outputs (0 actions)

[   +5 ms] Building application for the web... (completed in 7.1s)
[        ] Attempting to connect to browser instance..
[+1940 ms] Debug service listening on ws://127.0.0.1:40403/_UCF85NiTbQ=

[ +304 ms]       Failed to load asset at path: packages/build_web_compilers/src/dev_compiler/dart_sdk.js.

                          Status code: 404

                          Headers:
                          {
                      "date": "Thu, 09 Jan 2020 11:37:24 GMT",
                      "content-length": "9",
                      "x-frame-options": "SAMEORIGIN",
                      "content-type": "text/plain; charset=utf-8",
                      "x-xss-protection": "1; mode=block",
                      "x-content-type-options": "nosniff",
                      "server": "dart:io with Shelf",
                      "via": "1.1 shelf_proxy"
                    }

                          Content:
                          Not Found}

[  +25 ms] Attempting to connect to browser instance.. (completed in 2.3s)
[   +1 ms] Warning: Flutter's support for web development is not stable yet and hasn't
[        ] been thoroughly tested in production environments.
[        ] For more information see https://flutter.dev/web
[        ] 🔥  To hot restart changes while running, press "r". To hot restart (and refresh the browser),
press "R".
[   +1 ms] For a more detailed help message, press "h". To quit, press "q".
[   +6 ms] Debug service listening on ws://127.0.0.1:40403/_UCF85NiTbQ=

[KarimMohamed20]

try to delete build folder and run it again

[bsutton]

thanks for the response however Ive just tried that with the same result (i.e. it still fails with the same message.).

…

On Fri, 10 Jan 2020 at 00:15, Karim Mohamed ***@***.***> wrote: try to delete build folder and run it again — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#48483?email_source=notifications&email_token=AAG32OATWTFI5BS4KMGTAJ3Q44PQBA5CNFSM4KEVISL2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEIQIFGQ#issuecomment-572555930>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAG32OHGWWNP2YBCMDGEL6DQ44PQBANCNFSM4KEVISLQ> .

[iapicca]

Closely related to #48481

[yjbanov]

/cc @DanTup @jacob314

[yjbanov]

@bsutton have you tried the latest dev channel version or master version?

[DanTup]

If you run the command Dart: Capture Logs in VS Code (untick Analyzer since it'll just log lots of unnecessary noise here, but leave everything else ticked) and then repro, you should get a log with all the verbose output from Flutter that might be useful.

Are you running VS code normally (eg. locally, and not using remote/container/etc.)? I can't think of any obvious difference there should be here.