"Too many open files" #2834
Description
(copied from tox-dev/tox#3472)
Issue
Running tox in https://github.com/nedbat/django_coverage_plugin results in "Too many open files" errors from inside tox, virtualenv, etc.
Environment
Provide at least:
- OS: Mac OS 15.2
Output of pip list of the host Python, where tox is installed
% pip list
Package Version
------------------ -----------
attrs 25.1.0
backports.tarfile 1.2.0
build 1.2.2.post1
cachetools 5.5.1
certifi 2024.12.14
chardet 5.2.0
charset-normalizer 3.4.1
click 8.1.8
click-log 0.4.0
colorama 0.4.6
distlib 0.3.9
docutils 0.21.2
filelock 3.17.0
id 1.5.0
idna 3.10
importlib_metadata 8.6.1
jaraco.classes 3.4.0
jaraco.context 6.0.1
jaraco.functools 4.1.0
Jinja2 3.1.5
keyring 25.6.0
markdown-it-py 3.0.0
MarkupSafe 3.0.2
mdurl 0.1.2
more-itertools 10.6.0
nh3 0.2.20
packaging 24.2
pip 24.2
platformdirs 4.3.6
pluggy 1.5.0
Pygments 2.19.1
pyproject-api 1.9.0
pyproject_hooks 1.2.0
readme_renderer 44.0
requests 2.32.3
requests-toolbelt 1.0.0
rfc3986 2.0.0
rich 13.9.4
scriv 1.5.1
setuptools 74.0.0
tomli 2.2.1
tox 4.24.1
twine 6.1.0
typing_extensions 4.12.2
urllib3 2.3.0
virtualenv 20.29.1
wheel 0.44.0
zipp 3.21.0Output of running tox
Output of tox -rvv
It's 5200 lines, I put it in a gist: https://gist.github.com/nedbat/9f54a1756f4d3d3f34d00cf9cceb8440
Minimal example
% git clone https://github.com/nedbat/django_coverage_plugin.git
% cd django_coverage_plugin
% git checkout a1f1d93bccbd495e0d019052a6e411f88f5cbc6f
% pip install -r requirements.txt
% tox Sorry I don't have a smaller example.