Leftover process python_server.py with 100% after closing VSCode #25620
Description
Type: Bug
Behaviour
After closing VSCode, a leftover process remains running.
-
This happens locally on my macOS (using about 2.4% of a CPU core):
/Users/faber/.vscode/extensions/ms-python.python-2025.18.0-darwin-arm64/python_files/python_server.py -
as well as vis SSH Remote extension on a Linux cluster (using 100% of a CPU core [!]):
/bin/python /storage/homefs/fb24k097/.vscode-server/extensions/ms-python.python-2025.18.0-linux-x64/python_files/python_server.py
Steps to reproduce:
- Open up VSCode
- Open a python file
- Shift Enter in the python file to start a session and send some commands to the python REPL (e.g.
import pprint) - Close VSCode
- Check running processes with
htop
Diagnostic data
2025-12-03 11:28:43.148 [info] Experiment 'pythonSurveyNotification' is active
2025-12-03 11:28:43.485 [info] Native locator: Refresh started
2025-12-03 11:28:44.296 [info] > pyenv which python
2025-12-03 11:28:44.296 [info] cwd: .
2025-12-03 11:28:46.936 [info] Native locator: Refresh finished in 3452 ms
2025-12-03 11:28:49.055 [info] Starting Pylance language server.
2025-12-03 11:28:49.058 [info] Active interpreter [/storage/homefs/fb24k097/GitHub/fabern/aggregate-ERA5Land-daily]: /storage/homefs/fb24k097/GitHub/fabern/aggregate-ERA5Land-daily/.venv/bin/python
2025-12-03 11:29:00.927 [info] > /bin/python ~/.vscode-server/extensions/ms-python.python-2025.18.0-linux-x64/python_files/normalizeSelection.py
Extension version: 2025.18.0
VS Code version: Code 1.106.3 (bf9252a2fb45be6893dd8870c0bf37e2e1766d61, 2025-11-25T22:28:18.024Z)
OS version: Darwin arm64 24.6.0
Modes:
- Python version (& distribution if applicable, e.g. Anaconda): 3.13.7.final.0
- Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): System
- Value of the
python.languageServersetting: Default
User Settings
languageServer: "Pylance"
Installed Extensions
| Extension Name | Extension Id | Version |
|---|---|---|
| cmake-tools | ms- | 1.21.36 |
| copilot-chat | Git | 0.33.3 |
| cpptools | ms- | 1.28.3 |
| cpptools-extension-pack | ms- | 1.3.1 |
| cpptools-themes | ms- | 2.0.0 |
| debugpy | ms- | 2025.16.0 |
| fortran-ls | han | 0.6.2 |
| github-local-actions | San | 1.2.5 |
| gitlens | eam | 17.7.1 |
| js-debug | ms- | 1.105.0 |
| js-debug-companion | ms- | 1.1.3 |
| language-julia | jul | 1.158.2 |
| linter-gfortran | for | 3.4.2025101501 |
| makefile-tools | ms- | 0.12.17 |
| python | ms- | 2025.18.0 |
| r | REd | 2.8.6 |
| r-syntax | REd | 0.1.3 |
| remote-explorer | ms- | 0.5.0 |
| remote-ssh | ms- | 0.120.0 |
| remote-ssh-edit | ms- | 0.87.0 |
| vscode-js-profile-table | ms- | 1.0.10 |
| vscode-latex | mat | 1.3.0 |
| vscode-lldb | vad | 1.11.5 |
| vscode-peacock | joh | 4.2.2 |
| vscode-pylance | ms- | 2025.10.3 |
| vscode-python-envs | ms- | 1.12.0 |
System Info
| Item | Value |
|---|---|
| CPUs | Apple M4 (10 x 2400) |
| GPU Status | 2d_canvas: enabled direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: enabled_on trees_in_viz: disabled_off video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off |
| Load (avg) | 5, 3, 3 |
| Memory (System) | 16.00GB (0.18GB free) |
| Process Argv | --crash-reporter-id 08ffa65a-dbb4-4eb7-984b-8800380a22c8 |
| Screen Reader | no |
| VM | 0% |
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