[Python] Numpy importing error in mod_wsgi app on Fedora 43

I'm getting an error when importing numpy from an Apache mod_wsgi application on Fedora 43. It does not happen in Rocky Linux 9, the production server.

app.wsgi:

import sys
sys.path.insert(0, '/var/www/html/test/')
from test import application


test.py:

import numpy

def application(environ, start_response):
status = '200 OK'
output = b'Hello World!'

response_headers = [('Content-type', 'text/plain'),
('Content-Length', str(len(output)))]
start_response(status, response_headers)

return [output]


Error log:

mod_wsgi (pid=187553): Failed to exec Python script file '/var/www/html/test/app.wsgi'.
mod_wsgi (pid=187553): Exception occurred processing WSGI script '/var/www/html/test/app.wsgi'.
Traceback (most recent call last):
File "/var/www/html/test/venv/lib64/python3.14/site-packages/numpy/_core/__init__.py", line 22, in <module>
from . import multiarray
File "/var/www/html/test/venv/lib64/python3.14/site-packages/numpy/_core/multiarray.py", line 11, in <module>
from . import _multiarray_umath, overrides
ImportError: /var/www/html/test/venv/lib64/python3.14/site-packages/numpy/_core/_multiarray_umath.cpython-314-x86_64-linux-gnu.so: failed to map segment from shared object

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/var/www/html/test/venv/lib64/python3.14/site-packages/numpy/__init__.py", line 112, in <module>
from numpy.__config__ import show_config
File "/var/www/html/test/venv/lib64/python3.14/site-packages/numpy/__config__.py", line 4, in <module>
from numpy._core._multiarray_umath import (
...<3 lines>...
)
File "/var/www/html/test/venv/lib64/python3.14/site-packages/numpy/_core/__init__.py", line 48, in <module>
raise ImportError(msg) from exc
ImportError:

IMPORTANT: PLEASE READ THIS FOR ADVICE ON HOW TO SOLVE THIS ISSUE!

Importing the numpy C-extensions failed. This error can happen for
many reasons, often due to issues with your setup or how NumPy was
installed.

We have compiled some common reasons and troubleshooting tips at:

https://numpy.org/devdocs/user/troubleshooting-importerror.html

Please note and check the following:

* The Python version is: Python3.14 from "/var/www/html/test/venv/bin/python"
* The NumPy version is: "2.3.5"

and make sure that they are the versions you expect.
Please carefully study the documentation linked above for further help.

Original error was: /var/www/html/test/venv/lib64/python3.14/site-packages/numpy/_core/_multiarray_umath.cpython-314-x86_64-linux-gnu.so: failed to map segment from shared object


The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/var/www/html/test/app.wsgi", line 3, in <module>
from test import application
File "/var/www/html/test/test.py", line 1, in <module>
import numpy
File "/var/www/html/test/venv/lib64/python3.14/site-packages/numpy/__init__.py", line 117, in <module>
raise ImportError(msg) from e
ImportError: Error importing numpy: you should not try to import numpy from
its source directory; please exit the numpy source tree, and relaunch
your python interpreter from there.
mod_wsgi (pid=187552): Failed to exec Python script file '/var/www/html/test/app.wsgi'.
mod_wsgi (pid=187552): Exception occurred processing WSGI script '/var/www/html/test/app.wsgi'.
Traceback (most recent call last):
File "/var/www/html/test/venv/lib64/python3.14/site-packages/numpy/_core/__init__.py", line 22, in <module>
from . import multiarray
File "/var/www/html/test/venv/lib64/python3.14/site-packages/numpy/_core/multiarray.py", line 11, in <module>
from . import _multiarray_umath, overrides
ImportError: /var/www/html/test/venv/lib64/python3.14/site-packages/numpy/_core/_multiarray_umath.cpython-314-x86_64-linux-gnu.so: failed to map segment from shared object

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/var/www/html/test/venv/lib64/python3.14/site-packages/numpy/__init__.py", line 112, in <module>
from numpy.__config__ import show_config
File "/var/www/html/test/venv/lib64/python3.14/site-packages/numpy/__config__.py", line 4, in <module>
from numpy._core._multiarray_umath import (
...<3 lines>...
)
File "/var/www/html/test/venv/lib64/python3.14/site-packages/numpy/_core/__init__.py", line 48, in <module>
raise ImportError(msg) from exc
ImportError:

IMPORTANT: PLEASE READ THIS FOR ADVICE ON HOW TO SOLVE THIS ISSUE!

Importing the numpy C-extensions failed. This error can happen for
many reasons, often due to issues with your setup or how NumPy was
installed.

We have compiled some common reasons and troubleshooting tips at:

https://numpy.org/devdocs/user/troubleshooting-importerror.html

Please note and check the following:

* The Python version is: Python3.14 from "/var/www/html/test/venv/bin/python"
* The NumPy version is: "2.3.5"

and make sure that they are the versions you expect.
Please carefully study the documentation linked above for further help.

Original error was: /var/www/html/test/venv/lib64/python3.14/site-packages/numpy/_core/_multiarray_umath.cpython-314-x86_64-linux-gnu.so: failed to map segment from shared object


The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/var/www/html/test/app.wsgi", line 3, in <module>
from test import application
File "/var/www/html/test/test.py", line 1, in <module>
import numpy
File "/var/www/html/test/venv/lib64/python3.14/site-packages/numpy/__init__.py", line 117, in <module>
raise ImportError(msg) from e
ImportError: Error importing numpy: you should not try to import numpy from
its source directory; please exit the numpy source tree, and relaunch
your python interpreter from there.


If I import requests it works. Apache site config file setting the virtual environment:

<VirtualHost *:80>

ServerName test.local
ErrorLog logs/test-error_log
CustomLog logs/test-access_log combined

WSGIScriptAlias / /var/www/html/test/app.wsgi
WSGIDaemonProcess test processes=2 threads=15 display-name=%{GROUP} python-home=/var/www/html/test/venv
WSGIProcessGroup test

<Directory /var/www/htm/test>
Require all granted
</Directory>

</VirtualHost>


When I change the above config to not set the python-home variable, thus using the system environment, the error changes to

mod_wsgi (pid=189077): Failed to exec Python script file '/var/www/html/test/app.wsgi'.
mod_wsgi (pid=189077): Exception occurred processing WSGI script '/var/www/html/test/app.wsgi'.
Traceback (most recent call last):
File "/var/www/html/test/app.wsgi", line 3, in <module>
from test import application
File "/var/www/html/test/test.py", line 1, in <module>
import numpy
File "/usr/local/lib64/python3.14/site-packages/numpy/__init__.py", line 112, in <module>
from numpy.__config__ import show_config
File "/usr/local/lib64/python3.14/site-packages/numpy/__config__.py", line 4, in <module>
from numpy._core._multiarray_umath import (
...<3 lines>...
)
File "/usr/local/lib64/python3.14/site-packages/numpy/_core/__init__.py", line 22, in <module>
from . import multiarray
File "/usr/local/lib64/python3.14/site-packages/numpy/_core/multiarray.py", line 11, in <module>
from . import _multiarray_umath, overrides
RuntimeError: CPU dispatcher tracer already initlized
mod_wsgi (pid=189076): Failed to exec Python script file '/var/www/html/test/app.wsgi'.
mod_wsgi (pid=189076): Exception occurred processing WSGI script '/var/www/html/test/app.wsgi'.
Traceback (most recent call last):
File "/var/www/html/test/app.wsgi", line 3, in <module>
from test import application
File "/var/www/html/test/test.py", line 1, in <module>
import numpy
File "/usr/local/lib64/python3.14/site-packages/numpy/__init__.py", line 112, in <module>
from numpy.__config__ import show_config
File "/usr/local/lib64/python3.14/site-packages/numpy/__config__.py", line 4, in <module>
from numpy._core._multiarray_umath import (
...<3 lines>...
)
File "/usr/local/lib64/python3.14/site-packages/numpy/_core/__init__.py", line 22, in <module>
from . import multiarray
File "/usr/local/lib64/python3.14/site-packages/numpy/_core/multiarray.py", line 11, in <module>
from . import _multiarray_umath, overrides
RuntimeError: CPU dispatcher tracer already initlized


Importing numpy from both the venv and the system (as root) command line interpreter works

(venv) cpn@d3:/var/www/html/test$ python
Python 3.14.0 (main, Oct 17 2025, 00:00:00) [GCC 15.2.1 20251022 (Red Hat 15.2.1-3)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import numpy
>>>


root@d3:/etc/httpd/conf.d# python
Python 3.14.0 (main, Oct 17 2025, 00:00:00) [GCC 15.2.1 20251022 (Red Hat 15.2.1-3)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import numpy
>>>


Any ideas?

As suggested by @Nick Odell:

(venv) cpn@d3:/var/www/html/test$ python -c 'import sys; print(sys.prefix)'
/var/www/html/test/venv

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