Unable to connect to VM service at https... WebSocket connection failed

[intfract]

Flutter DevTools won't work after flutter run and 2 for chrome. I can't connect to my flutter app.

• Gitpod
• Brave Browser

Manually connecting doesn't work either.

[CoderDake]

Hey @intfract I've tried to reproduce but it seems to work fine for me.
Can you please give more detail about how you are running your app, and how you are trying to connect to it?
Could you also please post the results of running flutter doctor?

[intfract]

Issue

Sure, thanks for the reply. I am currently relying on Gitpod's slow linux noVNC because I can't use flutter devtools. It would be nice to get this working.

Flutter Doctor

The flutter doctor command only found 1 issue because I don't have android studio installed (not possible on Gitpod).

Source Code

If it helps, the source code can be found at this repo. I've checked my dart extension and it looks fine. However, my gitpod.yml and analysis_options.yaml both have 1 warning.

Gitpod Config

dart-code.dart-code extension is not synced, but not added in .gitpod.yml

Analysis Options

The include file 'package:lints/recommended.yaml' in '/home/gitpod/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_lints-2.0.1/lib/flutter.yaml' can't be found when analyzing '/workspace/flutter'.

[polina-c]

Thanks. For app started with flutter run the options to starte DevTools are:

1. Click DevTools URL in the output of flutter run:

If you use this way, DevTools should be already connected to the app. If it is not, do you see error details in console?

2. Run dart devtools, copy VM Service URL to the textbox, and click 'Connect'

Can you try both ways and check if there is error details in console?

May I also ask you to experiment with latest DevTools, and, if it fails, provide the error details in console: https://github.com/flutter/devtools/blob/master/BETA_TESTING.md

[intfract]

DevTools

I just get a blank page after running flutter run and selecting 2 for chrome. I clicked the link and waited for some time. The brave browser console (not linux terminal) showed some errors along with a Disconnected message.

main.dart.js:15698 WebSocket connection to 'ws://127.0.0.1:37565/nwxpJ58sXt8=/ws' failed:
WebSocketChannelException: WebSocket connection failed.
GET https://docs.flutter.dev/tools/devtools/release-notes/release-notes-2.12.2-src.md

I get a blank page again if I type dart devtools in the terminal.

It just says that I can't connect to the flutter VM service.

Other Info

Gitpod is a linux VM. This might be a problem because apparently kubernetes doesn't support VM nesting.

[polina-c]

It seems release notes for 2.12.2 are missing: https://docs.flutter.dev/tools/devtools/release-notes/release-notes-2.12.2-src.md

It was cherrypick: #3961

[polina-c]

Preparing fix.

[polina-c]

Fix: flutter/website#8977

[intfract]

Do I have to update flutter devtools or has nothing changed?

[CoderDake]

https://docs.flutter.dev/tools/devtools/release-notes/release-notes-2.12.2-src.md now has the release notes posted to it, thanks for Polina's fix.
@intfract I think that you should be able to give it a whirl without any extra effort on your part.

[polina-c]

@intfract , things should start working now
please, reopen the issue, if not

[kenzieschmoll]

The failure to load release notes should not block connection. The failure to connect to the vm service is a separate and independent issue.

[kenzieschmoll]

Please leave this issue open - the release notes fix did not solve the issue. The failure to connect is a separate error that we need to investigate and solve.

[bernaferrari]

Sorry, I have no idea what happened. Apparently I forked flutter website and it affected this somehow. Crazy!