关于python：Apache / Wsgi – 脚本在返回标题之前超时

Apache/Wsgi - Script timed out before returning headers

我在Ubuntu上遇到Apache / wsgi的问题。我正在尝试为django网站提供服务。
我已经在SO和其他网站上阅读了所有相同的问题，但我真的无法解决它。

我和其他成员有同样的问题。 2到3分钟后，请求以500错误结束，日志告诉我：在返回标题之前脚本超时 - wsgi.py.

权利还可以，Apache 2.4.7，libapache2-mod-wsgi 4ubuntu2.1.14.04.2。

启用的mod列表：

access_compat.load
alias.conf
alias.load
auth_basic.load
authn_core.load
authn_file.load
authz_core.load
authz_groupfile.load
authz_host.load
authz_user.load
autoindex.conf
autoindex.load
cgi.load
deflate.conf
deflate.load
dir.conf
dir.load
env.load
filter.load
mime.conf
mime.load
mpm_prefork.conf
mpm_prefork.load
negotiation.conf
negotiation.load
php5.conf
php5.load
reqtimeout.conf
reqtimeout.load
rewrite.load
setenvif.conf
setenvif.load
status.conf
status.load
wsgi.conf
wsgi.load

这是我的虚拟主机

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<VirtualHost *:80>
ServerAdmin info@rescuecode.fr
ServerName fiches.rescuecode.fr

DocumentRoot /home/repos/git/rescuecode-fiches

WSGIDaemonProcess rescuecode-fiches python-path=/home/repos/git/rescuecode-fiches:/home/virtualenvs/rescuecode-fiches/lib/python2.7/site-packages processes=4 threads=25
WSGIProcessGroup rescuecode-fiches
WSGIScriptAlias / /home/repos/git/rescuecode-fiches/project/wsgi.py
WSGIApplicationGroup %{GLOBAL}

Alias /static /home/repos/git/rescuecode-fiches/project/static/

<Directory /home/repos/git/rescuecode-fiches/project/static>
Require all granted
</Directory>

Alias /site_media /home/repos/git/rescuecode-fiches/project/site_media/

<Directory /home/repos/git/rescuecode-fiches/project/site_media>
Require all granted
</Directory>

<Directory /home/repos/git/rescuecode-fiches/project>
<Files wsgi.py>
Require all granted
</Files>
</Directory>

Loglevel warn
ErrorLog /var/log/apache2/fiches.rescuecode.fr-error.log
CustomLog /var/log/apache2/fiches.rescuecode.fr-access.log combined
ServerSignature Off

谁能告诉我我哪里错了？

谢谢！