Error when starting server

[Erispoe974]

Hi,
I'm trying to install mod_wsgi for running with Apache server V2.4.54.
After the pip installation, i try to check if it works with mod_wsgi-express start-server but i got an error :

Server URL : http://localhost:8000/
Server Root : C:/Users/ADMINI1/AppData/Local/Temp/2/mod_wsgi-localhost-8000-Administrateur
Server Conf : C:/Users/ADMINI1/AppData/Local/Temp/2/mod_wsgi-localhost-8000-Administrateur/httpd.conf
Error Log File : C:/Users/ADMINI~1/AppData/Local/Temp/2/mod_wsgi-localhost-8000-Administrateur/error_log (warn)
Operating Mode : daemon
Request Capacity : 5 (1 process * 5 threads)
Request Timeout : 60 (seconds)
Startup Timeout : 15 (seconds)
Queue Backlog : 100 (connections)
Queue Timeout : 45 (seconds)
Server Capacity : 20 (event/worker), 20 (prefork)
Server Backlog : 500 (connections)
Locale Setting : fr_FR.cp1252

WARNING: The ability to use the start-server option on Windows
WARNING: is highly experimental and various things don't quite
WARNING: work properly. If you understand a lot about using
WARNING: Python on Windows and Windows programming in general,
WARNING: and would like to help to get it working properly, then
WARNING: you can ask about Windows support for the start-server
WARNING: option on the mod_wsgi mailing list.

Traceback (most recent call last):
File "C:\Program Files\Python311\Scripts\mod_wsgi-express-script.py", line 33,
in
sys.exit(load_entry_point('mod-wsgi==4.9.4', 'console_scripts', 'mod_wsgi-express')())
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
^^^^^^^^^
File "C:\Program Files\Python311\Lib\site-packages\mod_wsgi\server_init_.py", line 3839, in main
cmd_start_server(args)
File "C:\Program Files\Python311\Lib\site-packages\mod_wsgi\server_init_.py", line 3672, in cmd_start_server
subprocess.call([executable]+httpd_arguments)
File "C:\Program Files\Python311\Lib\subprocess.py", line 389, in call
with Popen(*popenargs, **kwargs) as p:
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\subprocess.py", line 1026, in init
self._execute_child(args, executable, preexec_fn, close_fds,
File "C:\Program Files\Python311\Lib\subprocess.py", line 1538, in _execute_child
hp, ht, pid, tid = _winapi.CreateProcess(executable, args,
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
FileNotFoundError: [WinError 2] Le fichier spécifié est introuvable

Could you help me ?
My root apache directory : C:\wamp64\bin\apache\apache2.4.54.2

Thx for your help.
Regards,
Alexandre

[GrahamDumpleton]

As the message which is displayed indicates when it is started, mod_wsgi-express start-server on Windows isn't really supported and doesn't necessarily work. You need to manually configure Apache httpd on Windows to use the mod_wsgi module.

[Erispoe974]

Hi, Thanks for your ansswer.
It's what i'have done. And since it didn't work, I tried running this command to understand.
Because, when i restart apache with mod_wsgi, none of my websites are working anymore, I have a 500 error

[GrahamDumpleton]

What are the error messages in the Apache error log?

[Erispoe974]

Here is my configuration in httpd.conf :
# Django Project
LoadFile "C:/Program Files/Python311/python311.dll"
LoadModule wsgi_module "C:/Program Files/Python311/Lib/site-packages/mod_wsgi/server/mod_wsgi.cp311-win_amd64.pyd"
WSGIPythonHome "C:/Program Files/Python311"
WSGIScriptAlias / "C:/wamp64/www/BioSite_33/src/wsgi.py"
WSGIPythonPath "C:/wamp64/www/BioSite_33/"

I have no really errors :
[Wed Jun 28 13:52:02.043268 2023] [mpm_winnt:notice] [pid 2136:tid 252] AH00422: Parent: Received shutdown signal -- Shutting down the server.
[Wed Jun 28 13:52:04.090160 2023] [mpm_winnt:notice] [pid 4104:tid 268] AH00364: Child: All worker threads have exited.
[Wed Jun 28 13:52:09.558961 2023] [mpm_winnt:notice] [pid 2136:tid 252] AH00430: Parent: Child process 4104 exited successfully.
[Wed Jun 28 13:52:58.005595 2023] [mpm_winnt:notice] [pid 4640:tid 252] AH00455: Apache/2.4.54 (Win64) PHP/8.0.26 mod_fcgid/2.3.10-dev mod_wsgi/4.9.4 Python/3.11 configured -- resuming normal operations
[Wed Jun 28 13:52:58.005595 2023] [mpm_winnt:notice] [pid 4640:tid 252] AH00456: Apache Lounge VS16 Server built: Nov 2 2022 10:09:33
[Wed Jun 28 13:52:58.005595 2023] [core:notice] [pid 4640:tid 252] AH00094: Command line: 'c:\wamp64\bin\apache\apache2.4.54.2\bin\httpd.exe -d C:/wamp64/bin/apache/apache2.4.54.2'
[Wed Jun 28 13:52:58.005595 2023] [mpm_winnt:notice] [pid 4640:tid 252] AH00418: Parent: Created child process 2596
[Wed Jun 28 13:52:58.552476 2023] [mpm_winnt:notice] [pid 2596:tid 268] AH00354: Child: Starting 64 worker threads.

[GrahamDumpleton]

Ensure LogLevel in Apache is set to at least info and not err or warn. This will give extra information about what mod_wsgi is doing and whether it is even attempting to load your WSGI application. Because you have mod_fcgid loaded, it could be highjacking the request, as could mod_cgi depending on what other config you have.

[Erispoe974]

I change httpd.conf the LogLevel to Info, and the result :
[Wed Jun 28 15:58:50.114456 2023] [mpm_winnt:notice] [pid 3508:tid 252] AH00455: Apache/2.4.54 (Win64) PHP/8.0.26 mod_fcgid/2.3.10-dev mod_wsgi/4.9.4 Python/3.11 configured -- resuming normal operations
[Wed Jun 28 15:58:50.114456 2023] [mpm_winnt:notice] [pid 3508:tid 252] AH00456: Apache Lounge VS16 Server built: Nov 2 2022 10:09:33
[Wed Jun 28 15:58:50.114456 2023] [core:notice] [pid 3508:tid 252] AH00094: Command line: 'c:\wamp64\bin\apache\apache2.4.54.2\bin\httpd.exe -d C:/wamp64/bin/apache/apache2.4.54.2'
[Wed Jun 28 15:58:50.115448 2023] [mpm_winnt:notice] [pid 3508:tid 252] AH00418: Parent: Created child process 4732
[Wed Jun 28 15:58:50.498710 2023] [wsgi:info] [pid 4732:tid 276] mod_wsgi (pid=4732): Initializing Python.
[Wed Jun 28 15:58:50.543764 2023] [wsgi:info] [pid 4732:tid 276] mod_wsgi (pid=4732): Attach interpreter ''.
[Wed Jun 28 15:58:50.557751 2023] [wsgi:info] [pid 4732:tid 276] mod_wsgi (pid=4732): Adding 'C:/Program Files/Python311/Lib/site-packages' to path.
[Wed Jun 28 15:58:50.560777 2023] [wsgi:info] [pid 4732:tid 276] mod_wsgi (pid=4732): Adding 'C:/wamp64/www/BioSite_33/' to path.
[Wed Jun 28 15:58:50.588797 2023] [wsgi:info] [pid 4732:tid 276] mod_wsgi (pid=4732): Imported 'mod_wsgi'.
[Wed Jun 28 15:58:50.589797 2023] [mpm_winnt:notice] [pid 4732:tid 276] AH00354: Child: Starting 64 worker threads.
[Wed Jun 28 15:59:14.397548 2023] [wsgi:info] [pid 4732:tid 1160] mod_wsgi (pid=4732): Create interpreter 'localhost|'.
[Wed Jun 28 15:59:14.412534 2023] [wsgi:info] [pid 4732:tid 1160] mod_wsgi (pid=4732): Adding 'C:/Program Files/Python311/Lib/site-packages' to path.
[Wed Jun 28 15:59:14.419540 2023] [wsgi:info] [pid 4732:tid 1160] mod_wsgi (pid=4732): Adding 'C:/wamp64/www/BioSite_33/' to path.
[Wed Jun 28 15:59:14.462575 2023] [wsgi:info] [pid 4732:tid 1160] [client 10.33.6.10:64032] mod_wsgi (pid=4732, process='', application='localhost|'): Loading Python script file 'C:/wamp64/www/BioSite_33/src/wsgi.py'.

[GrahamDumpleton]

The WSGI application is at least being loaded. The fact that there is no trace back though indicates that if the 500 error is being generated as a result of the WSGI application, that the web framework you are using is internally capturing the error and turning it into a HTTP 500 response itself, without logging the details.

This lack of logging for internal code errors and return a HTTP 500 response is what some Python web frameworks will do unless you specifically configure them to log details of the exceptions. What Python web framework are you using?

[Erispoe974]

Thanks for your answers.
My framework : Django

Regards,
Alexandre

[GrahamDumpleton]

Have a read of:

• https://www.agiliq.com/blog/2017/12/configure-django-log-exceptions-production/

At the minimum, set Django DEBUG mode on to work out what the error is.

[Erispoe974]

Debug_mode is already on TRUE, but no error on the ie or chrome.
And we finely finf the issue :
If i add "WSGIScriptAlias / "C:/wamp64/www/BioSite_33/src/wsgi.py"" in httpd.conf file, the serveur doen't anwser, no error.
This line must be adding into httpd-vhosts.conf file beteween and

Thanks a lot GrahamDumpleton, you're a boss and you was very helpfull.

Regards.