apache mod_wsgi仅在守护程序模式下崩溃

Question

I was using apache webserver and mod_python as my interface.I am in the process of moving from mod_python to mod_wsgi. I have done all the setup and everything was working fine. Now when i added the following line(to enable daemon mode), the site was not working.

WSGIDaemonProcess test.tessite.com processes=5 threads=10 display-name=%{GROUP}

I got a 500 error as response from the server. When i looked into Apache's error log, i have the follwoing,

[Mon Oct 22 12:31:07 2012] [error] [client 58.68.24.230] Premature end of script headers: ls.wsgi

This is my WSGI setup in conf,

#Set the number of process and threads for each process. process*thread number of requests can be handled at a time
WSGIDaemonProcess test.testsite.com processes=5 threads=10 display-name=%{GROUP}
#Sets which process group WSGI application is assigned to.
WSGIProcessGroup test.testsite.com
#Maps a URL to a filesystem location and designates the target as a WSGI script.
WSGIScriptAlias / /public/gdp/trunk/src/ukl/lis/process/ls.wsgi
<Directory /public/gdp/trunk/src/ukl/lis/process/>
    Order allow,deny
    Allow from all
</Directory>

Why does this happen only in Daemon mode? How, to fix this problem? Is it safe to run in a non-daemon mode?

Answer 1

Have a look at https://code.google.com/p/modwsgi/wiki/FrequentlyAskedQuestions , section "Apache Process Crashes", last question. Is the mod_python apache module still loaded? Are you using any third party libraries that have a C component?