[Mono-list] Internal Server Error 500 caused by mod-mono-server

[Antonello Provenzano]

Hi guys,

In the past week-end I posted a problem I had with mono_mono. Maybe
because of the week-end time, nobody answered me and I'm scared the
post was "lost", so I decided to post it again.


I set up a test environment on my Ubuntu 6.0 with Apache 2.0 and Mono
1.1.13.6 (the latest found on repository
http://people.debian.org/~formoer/mono).
The first tests I've made on the website were successful and very good
(I also launched a flood test to check the response time and the
memory load with excellent results), using the following configuration
(in the /etc/apache2/sites-enabled/default configuration file):

       DocumentRoot /path/to/the/web/site
       <Directory />
               Options FollowSymLinks
               AllowOverride None
       </Directory>
       MonoApplications default "/:/path/to/the/web/site"
       <Directory /path/to/the/web/site/>
               Options Indexes FollowSymLinks MultiViews
               AllowOverride None
               Order allow,deny
               allow from all
               SetHandler mono
       </Directory>

As you can see, I stripped any advanced configuration to mod_mono (eg.
MonoMaxMemory or MonoCPUTime).

Anyway, after a while I started having some troubles, since the site
begun responding with a 500 error code (internal server error).
I checked the Apache error files log and this is what I found:

[Sat Sep 30 16:12:58 2006] [notice] Apache/2.0.55 (Ubuntu)
mod_mono/1.1.10 configured -- resuming normal operations
Another mod-mono-server with the same arguments is already running.
Another mod-mono-server with the same arguments is already running.

I tried killing all the mod-mono-server processes pointing to
/path/to/the/web/site and restarting Apache, but with the same result.

Anyone could explain me how to fix this permanently or what
configuration should I adopt to avoid such this error in production?

Thanks
Antonello