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POmod_wsgi fails under pressure
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  1. POmod_wsgi fails under pressure
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    copied!<p>I tried to stress my server a little, and something weird happened. I'm using mod_wsgi, with basic script plugged in:</p> <pre><code>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] </code></pre> <p>I tried to stress it a little with simple "hit it all I can":</p> <pre><code>#!/bin/zsh for i in {1..50} do wget http://$this_site/ &amp; done </code></pre> <p>And weird thing happened - wget thrown at me reports about error 500 on server.</p> <p>when I checked out apache logs, this is what I found</p> <pre><code>[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 &lt;module&gt; [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 &lt;module&gt; [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 &lt;module&gt; [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 </code></pre> <p>How is this possible? And why is it happening?</p>
 

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