Attaching python debugger fails in rarely

[cedric-fauth]

Type: Bug

Behaviour

Expected vs. Actual

The following launch config sometimes fails but port is open and the debugee process is waiting for the debugger to attach:

        {
            "name": "Manual: Attach debugger",
            "type": "python",
            "request": "attach",
            "connect": {
                "host": "127.0.0.1",
                "port": 5678
            },
            "pathMappings": [
                {
                    "localRoot": "${workspaceFolder}",
                    "remoteRoot": "."
                }
            ],
            "justMyCode": false,
            "logToFile": true,
            "redirectOutput": true,
            "django": true
        },

Steps to reproduce:

1. Cannot be reproduced even not by me it just happens sometimes when intensively using a python process and the debugger.

Diagnostic data

• Python version (& distribution if applicable, e.g. Anaconda): 3.9.2
• Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): Global
• Value of the python.languageServer setting: Pylance

Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

2023-12-05 15:15:02.885 [error] Cannot read properties of undefined (reading 'defaultEncoding'): TypeError: Cannot read properties of undefined (reading 'defaultEncoding')
    at _write (node:internal/streams/writable:294:24)
    at Writable.write (node:internal/streams/writable:337:10)
    at u.log (/home/vscode/.vscode-server/extensions/ms-python.python-2023.20.0/out/client/extension.js:2:345214)
    at u.onWillStopSession (/home/vscode/.vscode-server/extensions/ms-python.python-2023.20.0/out/client/extension.js:2:344975)
    at /vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:122:386
    at Array.forEach (<anonymous>)
    at m.onWillStopSession (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:122:353)
    at a.$stopDASession (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:121:9917)
    at i.N (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:117:10813)
    at i.M (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:117:10579)
    at i.H (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:117:9660)
    at i.G (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:117:8736)
    at n.value (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:117:7566)
    at m.w (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:63:1902)
    at m.fire (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:63:2119)
    at v.fire (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:79:13940)
    at n.value (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:136:7901)
    at m.w (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:63:1902)
    at m.fire (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:63:2119)
    at v.fire (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:79:13940)
    at s.z (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:79:17005)
    at n.value (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:79:16410)
    at m.w (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:63:1902)
    at m.fire (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:63:2119)
    at n.acceptChunk (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:79:11714)
    at n.value (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:79:11001)
    at m.w (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:63:1902)
    at m.fire (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:63:2119)
    at m.u (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:133:19093)
    at m.acceptFrame (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:133:18899)
    at a.l (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:133:17532)
    at /vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:133:14879
    at Socket.p (/vscode/vscode-server/bin/linux-x64/8b617bd08fd9e3fc94d14adb8d358b56e3f72314/out/vs/workbench/api/node/extensionHostProcess.js:133:12793)
    at Socket.emit (node:events:513:28)
    at Socket.emit (node:domain:489:12)
    at addChunk (node:internal/streams/readable:324:12)
    at readableAddChunk (node:internal/streams/readable:297:9)
    at Readable.push (node:internal/streams/readable:234:10)
    at TCP.onStreamRead (node:internal/stream_base_commons:190:23)
2023-12-05 15:15:12.404 [error] Error while getting the engine for the version 0.6.0. Server returned 404```

</p>
</details>

<details>

<summary>User Settings</summary>

<p>

languageServer: "Pylance"

testing
• pytestEnabled: true

</p>
</details>


Extension version: 2023.20.0
VS Code version: Code 1.84.2 (1a5daa3a0231a0fbba4f14db7ec463cf99d7768e, 2023-11-09T10:51:52.184Z)
OS version: Windows_NT x64 10.0.22621
Modes:
Remote OS version: Linux x64 5.15.133.1-microsoft-standard-WSL2


<!-- generated by issue reporter -->

[paulacamargo25]

Hin @cedric-fauth, thanks for your bug report, could you try in insiders using the new Python Debugger extension? Thanks

[daniel-westerfeld]

I also get this error @paulacamargo25 and it is extremely annoying. Anything one can do about it?

[paulacamargo25]

Thanks for the issue report @daniel-westerfeld , could you send me your launch.json config and the output of the Python Debugger Extension?

[vs-code-engineering]

Hey @karthiknadig, this issue might need further attention.

@cedric-fauth, you can help us out by closing this issue if the problem no longer exists, or adding more information.

[cedric-fauth]

The problem still exists, but I don't know what more information to provide.

[vs-code-engineering]

Hey @karthiknadig, this issue might need further attention.

@cedric-fauth, you can help us out by closing this issue if the problem no longer exists, or adding more information.

[vs-code-engineering]

This issue has been closed automatically because it needs more information and has not had recent activity. See also our issue reporting guidelines.

Happy Coding!