Mod_wsgi fails

I tried to emphasize my server a bit and something strange happened. I am using mod_wsgi, with the base script connected:

import socket def application(environ, start_response): status = '200 OK' output = 'Hello World!' response_headers = [('Content-type', 'text/plain'), ('Content-Length', str(len(output)))] start_response(status, response_headers) return [output] 

I tried to emphasize this a bit with the simple β€œhit all I can”:

 #!/bin/zsh for i in {1..50} do wget http://$this_site/ & done 

And a strange thing happened - wget threw a 500 error message on me on the server.

when i checked apache logs, this is what i found

 [Sat Mar 10 21:46:18 2012] [error] [client 95.49.81.25] mod_wsgi (pid=23632): Target WSGI script '/home/tricky/www/run.py' cannot be loaded as Python module. [Sat Mar 10 21:46:18 2012] [error] [client 95.49.81.25] mod_wsgi (pid=23632): Exception occurred processing WSGI script '/home/tricky/www/run.py'. [Sat Mar 10 21:46:18 2012] [error] [client 95.49.81.25] Traceback (most recent call last): [Sat Mar 10 21:46:18 2012] [error] [client 95.49.81.25] File "/home/tricky/www/run.py", line 1, in <module> [Sat Mar 10 21:46:18 2012] [error] [client 95.49.81.25] import web [Sat Mar 10 21:46:18 2012] [error] [client 95.49.81.25] File "/usr/local/lib/python2.7/site-packages/web.py-0.36-py2.7.egg/web/__init__.py", line 14, in <module> [Sat Mar 10 21:46:18 2012] [error] [client 95.49.81.25] import utils, db, net, wsgi, http, webapi, httpserver, debugerror [Sat Mar 10 21:46:18 2012] [error] [client 95.49.81.25] File "/usr/local/lib/python2.7/site-packages/web.py-0.36-py2.7.egg/web/wsgi.py", line 8, in <module> [Sat Mar 10 21:46:18 2012] [error] [client 95.49.81.25] import http [Sat Mar 10 21:46:18 2012] [error] [client 95.49.81.25] ImportError: No module named http 

How is this possible? And why is this happening?

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Well, I found a solution - apache2 had some weird race condition after it was messing around with this configuration. After service apache2 restart everything returned to normal :)

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