Python Language Server does not Restart

[CristopherH95]

Type: Bug

Behaviour

Attempting to restart the Python language server, when running inside a Dev Container, stops the server but never starts it again.

Note: I encountered this while using Dev Container volume mounting on Windows.

Steps to reproduce:

1. Create a Dev Container where the Python extension is installed.
2. Once the workspace is setup, attempt to restart the Python language server via the "Python: Restart Language Server" command in the Command Palette.
3. Observe in the "Python Language Server" output, that the server processes has exited.
4. Wait for server to start again, observe that it does not start.

Diagnostic data

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

2024-09-16 18:35:33.091 [info] Telemetry level is off
2024-09-16 18:35:33.091 [info] Experiments are disabled, only manually opted experiments are active.
2024-09-16 18:35:33.091 [warning] Dir "/workspace/.pixi/envs" is not watchable (directory does not exist)
2024-09-16 18:35:33.091 [info] Default formatter is set to ms-python.black-formatter for workspace /workspace
2024-09-16 18:35:33.092 [info] Python interpreter path: /usr/local/bin/python
2024-09-16 18:35:33.382 [info] > pyenv which python
2024-09-16 18:35:33.382 [info] cwd: .
2024-09-16 18:35:43.737 [info] Starting Pylance language server.
2024-09-16 18:36:52.899 [error] [
  'Failed to start language server, Class name = h, completed in 4ms, has a falsy return value, Arg 1: <Uri:/workspace>, Arg 2: {"id":"/usr/local/bin/python","sysPrefix":"/usr/local","envType":"Global","envName":"","envPath":"","path":"/usr/local/bin/python","architecture":3,"sysVersion":"3.9.19 (main, May 14 2024, 09:00:30) \\n[GCC 12.2.0]","version":{"raw":"3.9.19","major":3,"minor":9,"patch":19,"build":[],"prerelease":["final","0"]},"displayName":"Python 3.9.19 64-bit","detailedDisplayName":"Python 3.9.19 64-bit"}, Arg 3: {"documentSelector":[{"scheme":"file","language":"python"},{"scheme":"untitled","language":"python"},{"scheme":"vscode-notebook","language":"python"},{"scheme":"vscode-notebook-cell","language":"python"},{"scheme":"vscode-interactive-input","language":"python"}],"synchronize":{"configurationSection":["python","jupyter.runStartupCommands"]},"outputChannel":{"name":"Python Language Server","logLevel":3},"revealOutputChannelOn":4,"initializationOptions":{"experimentationSupport":true,"trustedWorkspaceSupport":true},"middleware":{"serviceContainer":{"container":{"options":{"autoBindInjectable":false,"defaultScope":"Transient","skipBaseClassChecks":true},"id":0,"_bindingDictionary":{"_map":{}},"_snapshots":[],"_middleware":null,"_activations":{"_map":{}},"_deactivations":{"_map":{}},"parent":null,"_metadataReader":{},"_moduleActivationStore":{"_map":{}}}},"serverVersion":"2024.9.1","lastCaptured":{},"nextWindow":0,"eventCount":0,"workspace":{},"connectedPromise":{"scope":null,"_resolved":true,"_rejected":false,"_promise":{}},"notebooks":{},"eventName":"LANGUAGE_SERVER.REQUEST"}}, Return Value: undefined',
  [Error: LanguageStatusItem with id 'python.analysis.typeCheckingMode' ALREADY exists
  	at c.createLanguageStatusItem (/root/.vscode-server/bin/38c31bc77e0dd6ae88a4e9cc93428cc27a56ba40/out/vs/workbench/api/node/extensionHostProcess.js:161:163942)
  	at Object.createLanguageStatusItem (/root/.vscode-server/bin/38c31bc77e0dd6ae88a4e9cc93428cc27a56ba40/out/vs/workbench/api/node/extensionHostProcess.js:171:38483)
  	at _0xbcc266.createStatusItem (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:275986)
  	at _0xbcc266.updateStatusItem (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:289545)
  	at _0xbcc266.activate (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:273499)
  	at _0x31c314 (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:321112)
  	at _0x2858ed (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:246910)
  	at async _0xe3bdb8._startClient (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:193154)
  	at async _0xe3bdb8._createNewRequest (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:192675)
  	at async _0xe3bdb8._enqueueRequestAndWaitForRun (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:191917)
  	at async _0xe3bdb8.startClient (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:191380)
  	at async h.start (/root/.vscode-server/extensions/ms-python.python-2024.14.1-linux-x64/out/client/extension.js:2:39659)]
]
2024-09-16 18:36:52.899 [error] [
  'Starting language server, Class name = d, completed in 6ms, has a falsy return value, , Return Value: undefined',
  [Error: LanguageStatusItem with id 'python.analysis.typeCheckingMode' ALREADY exists
  	at c.createLanguageStatusItem (/root/.vscode-server/bin/38c31bc77e0dd6ae88a4e9cc93428cc27a56ba40/out/vs/workbench/api/node/extensionHostProcess.js:161:163942)
  	at Object.createLanguageStatusItem (/root/.vscode-server/bin/38c31bc77e0dd6ae88a4e9cc93428cc27a56ba40/out/vs/workbench/api/node/extensionHostProcess.js:171:38483)
  	at _0xbcc266.createStatusItem (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:275986)
  	at _0xbcc266.updateStatusItem (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:289545)
  	at _0xbcc266.activate (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:273499)
  	at _0x31c314 (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:321112)
  	at _0x2858ed (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:246910)
  	at async _0xe3bdb8._startClient (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:193154)
  	at async _0xe3bdb8._createNewRequest (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:192675)
  	at async _0xe3bdb8._enqueueRequestAndWaitForRun (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:191917)
  	at async _0xe3bdb8.startClient (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:191380)
  	at async h.start (/root/.vscode-server/extensions/ms-python.python-2024.14.1-linux-x64/out/client/extension.js:2:39659)]
]
2024-09-16 18:36:52.899 [error] [
  'Restarting language server, Class name = d, completed in 9ms, has a falsy return value, , Return Value: undefined',
  [Error: LanguageStatusItem with id 'python.analysis.typeCheckingMode' ALREADY exists
  	at c.createLanguageStatusItem (/root/.vscode-server/bin/38c31bc77e0dd6ae88a4e9cc93428cc27a56ba40/out/vs/workbench/api/node/extensionHostProcess.js:161:163942)
  	at Object.createLanguageStatusItem (/root/.vscode-server/bin/38c31bc77e0dd6ae88a4e9cc93428cc27a56ba40/out/vs/workbench/api/node/extensionHostProcess.js:171:38483)
  	at _0xbcc266.createStatusItem (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:275986)
  	at _0xbcc266.updateStatusItem (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:289545)
  	at _0xbcc266.activate (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:273499)
  	at _0x31c314 (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:321112)
  	at _0x2858ed (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:246910)
  	at async _0xe3bdb8._startClient (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:193154)
  	at async _0xe3bdb8._createNewRequest (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:192675)
  	at async _0xe3bdb8._enqueueRequestAndWaitForRun (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:191917)
  	at async _0xe3bdb8.startClient (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:191380)
  	at async h.start (/root/.vscode-server/extensions/ms-python.python-2024.14.1-linux-x64/out/client/extension.js:2:39659)]
]
2024-09-16 18:36:52.899 [error] [
  'Failed to restart language server, Class name = d, completed in 9ms, has a falsy return value, , Return Value: undefined',
  [Error: LanguageStatusItem with id 'python.analysis.typeCheckingMode' ALREADY exists
  	at c.createLanguageStatusItem (/root/.vscode-server/bin/38c31bc77e0dd6ae88a4e9cc93428cc27a56ba40/out/vs/workbench/api/node/extensionHostProcess.js:161:163942)
  	at Object.createLanguageStatusItem (/root/.vscode-server/bin/38c31bc77e0dd6ae88a4e9cc93428cc27a56ba40/out/vs/workbench/api/node/extensionHostProcess.js:171:38483)
  	at _0xbcc266.createStatusItem (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:275986)
  	at _0xbcc266.updateStatusItem (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:289545)
  	at _0xbcc266.activate (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:273499)
  	at _0x31c314 (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:321112)
  	at _0x2858ed (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:246910)
  	at async _0xe3bdb8._startClient (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:193154)
  	at async _0xe3bdb8._createNewRequest (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:192675)
  	at async _0xe3bdb8._enqueueRequestAndWaitForRun (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:191917)
  	at async _0xe3bdb8.startClient (/root/.vscode-server/extensions/ms-python.vscode-pylance-2024.9.1/dist/extension.bundle.js:1:191380)
  	at async h.start (/root/.vscode-server/extensions/ms-python.python-2024.14.1-linux-x64/out/client/extension.js:2:39659)]
]

Extension version: 2024.14.1
VS Code version: Code 1.93.1 (38c31bc77e0dd6ae88a4e9cc93428cc27a56ba40, 2024-09-11T17:20:05.685Z)
OS version: Windows_NT x64 10.0.19045
Modes:
Remote OS version: Linux x64 5.15.153.1-microsoft-standard-WSL2
Remote OS version: Linux x64 5.15.153.1-microsoft-standard-WSL2

• Python version (& distribution if applicable, e.g. Anaconda): 3.9.19
• Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): Global
• Value of the python.languageServer setting: Default

User Settings

languageServer: "Pylance"

Installed Extensions

Extension Name	Extension Id	Version
autopep8	ms-python.autopep8	2024.0.0
Black Formatter	ms-python.black-formatter	2024.2.0
Django	batisteo.vscode-django	1.15.0
ESLint	dbaeumer.vscode-eslint	3.0.10
Flake8	ms-python.flake8	2023.10.0
JavaScript Debugger	ms-vscode.js-debug	1.93.0
Pylance	ms-python.vscode-pylance	2024.9.1
Python	ms-python.python	2024.14.1
Python Debugger	ms-python.debugpy	2024.10.0
Table Visualizer for JavaScript Profiles	ms-vscode.vscode-js-profile-table	1.0.9

[rchiodo]

This should be a dupe of #6378

Alternatively, Developer : Restart Extension Host should do the same thing as restart language server.