mod_wsgi在压力下失败

我试图强调我的服务器一点，发生了一些奇怪的事情。我使用mod_wsgi的，基本的脚本插上电源：mod_wsgi在压力下失败

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]

我想强调这一点用简单的“打我所能”：

#!/bin/zsh 

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

而且奇怪的事情发生了 - 抛出的wget在我报告有关服务器上的错误500。

当我检查了Apache日志，这是我发现

[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

这怎么可能？为什么会发生？

来源

2012-03-10 Bugari

错误指出您的wswgi脚本导入了网页，而网页模块依赖于http模块，这在系统中找不到 – 2012-03-10 21:20:48

而且，这不会在'normal'下发生，加载？ – 2012-03-10 22:42:35

棘手的部分是，在正常的负载下一切正常工作... – Bugari 2012-03-11 09:24:15

好吧，我发现解决方案 - apache2在弄乱了配置之后出现了一些奇怪的竞态。 service apache2 restart之后的一切都恢复正常:)

来源

2012-05-04 10:04:47 Bugari

mod_wsgi在压力下失败

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