May not be relevant any more as this is an old message from when I was
on holidays, but it indicates that the Django application running in
daemon mode likely blocked on something. Because it was a single
daemon process running a single thread, there would be no ability to
do parallel requests, so a single request blocking would easily cause
problems.

Graham

On 11 September 2012 21:04, grindo <[email protected]> wrote:
> I have an old Django app that has been working for couple of years without
> problems and today it became unresponsive with error:
> Script timed out before returning headers: bbb.wsgi
> I've restarted Apache, and even the server, but still get the same error.
>
> Nothing was changed in Django app nor server configuration in the last
> couple of weeks.
>
> I'm running Ubuntu 10.10 with apache 2.2.
>
> apache config:
>
> WSGIDaemonProcess www.bbb.aaa threads=1
> WSGIProcessGroup www.bbb.aaa
> WSGIApplicationGroup %{GLOBAL}
> WSGIScriptAlias /bbb /somepath/bbb.wsgi
>
> wsgi config:
>
> import site
> site.addsitedir('somepath/pyenv/django-1.1.2/lib/python2.6/site-packages')
>
> import os, sys
> sys.path.append('/somepath/django')
> os.environ['DJANGO_SETTINGS_MODULE'] = 'bbb.settings'
> import django.core.handlers.wsgi
> application = django.core.handlers.wsgi.WSGIHandler()
>
> apache.log (after restart)
>
> [Tue Sep 11 11:48:45 2012] [info] mod_wsgi (pid=2255): Attach interpreter
> ''.
> [Tue Sep 11 11:48:45 2012] [debug] mod_wsgi.c(8702): mod_wsgi (pid=2255):
> Starting 1 threads in daemon process 'www.bbb.aaa'.
> [Tue Sep 11 11:48:45 2012] [debug] mod_wsgi.c(8708): mod_wsgi (pid=2255):
> Starting thread 1 in daemon process 'www.bbb.aaa'.
> [Tue Sep 11 11:48:45 2012] [info] mod_wsgi (pid=2255): Enable deadlock
> thread in process 'www.bbb.aaa'.
> [Tue Sep 11 11:48:45 2012] [info] mod_wsgi (pid=2255): Enable monitor thread
> in process 'www.bbb.aaa'.
> [Tue Sep 11 11:48:45 2012] [debug] mod_wsgi.c(8542): mod_wsgi (pid=2255):
> Deadlock timeout is 300.
> [Tue Sep 11 11:48:45 2012] [debug] mod_wsgi.c(8545): mod_wsgi (pid=2255):
> Inactivity timeout is 0.
> [Tue Sep 11 11:48:51 2012] [info] [client 192.168.190.129] mod_wsgi
> (pid=2255, process='www.bbb.aaa', application=''): Loading WSGI script
> '/somepath/bbb.wsgi'.
> [Tue Sep 11 11:55:09 2012] [error] [client 192.168.191.16] Script timed out
> before returning headers: bbb.wsgi
> [Tue Sep 11 11:55:09 2012] [debug] mod_deflate.c(615): [client
> 192.168.191.16] Zlib: Compressed 609 to 376 : URL /bbb/
>
> Any help appreciated.
>
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