Re: Can't locate object method "new" via package "CGI::Cookie"

On 31.05.2020 20:49, Vincent Veyron wrote:
> Hi List,
> 
> I have two servers using mod_perl, both having the same modules installed and enabled; server1 got a fresh install of Debian Buster, while server2 was upgraded to Buster from Stretch.
> 
> This code :
> 	my $cookie = CGI::Cookie->new(-name  => 'session',
>   				      -value => $session_id,
> 				      -domain => $hostname
> 	    ) ;
> 
> generates the following error on server2 :
> 
> [Sun May 31 19:54:03.053725 2020] [perl:error] [pid 30663] [client 83.113.48.133:59196] Can't locate object method "new" via package "CGI::Cookie" (perhaps you forgot to load "CGI::Cookie"?) at /home/lib/Marica/Base/login.pm line 198.\n, referer: https://marica.fr/site/abonnes/index.html
> 
> It works fine if add "use CGI::Cookie" to my module.
> 
> What could be the reason why it works on server1 without "use CGI::Cookie" and not on server2?
> 

Hi.
Since the two systems were installed/upgraded differently  ..

When I configure mod_perl on a Debian system, I usually have a "startup script" running 
from within the /etc/apache2/mod_enabled/perl.conf file, e.g. via

PerlPostConfigRequire "/etc/apache2/modperl2_startup.pl"

This startup script, among other things, preloads frequently-used modules, so that they 
will be loaded and available later in any Apache child/thread. Like :

...
   use lib "some_path_with_proprietary_modules";
...
   use ModPerl::Registry ();
   use CGI ();
   CGI->compile(':all');
   use My::Module;
...

Maybe you forgot this on one of the systems, and not the other ?

P.S.
I also use the same startup script to log some information to the Apache error log at 
startup, such as this for example :

[Sun May 31 06:25:08.054152 2020] [:error] [pid 5519] mp2-startup: EFSDIR is : /home/EFS
[Sun May 31 06:25:08.054160 2020] [:error] [pid 5519] mp2-startup: AUTHZ_GRANTED is : 1
[Sun May 31 06:25:08.054166 2020] [:error] [pid 5519] mp2-startup: AUTHZ_DENIED is : 0
[Sun May 31 06:25:08.054173 2020] [:error] [pid 5519] mp2-startup: AUTHZ_DENIED_NO_USER is : 4
[Sun May 31 06:25:08.054184 2020] [:error] [pid 5519] mp2-startup: @INC is now : 
/home/EFS/lib / /etc/perl / /usr/local/lib/x86_64-linux-gnu/perl/5.20.2 / 
/usr/local/share/perl/5.20.2 / /usr/lib/x86_64-linux-gnu/perl5/5.20 / /usr/share/perl5 / 
/usr/lib/x86_64-linux-gnu/perl/5.20 / /usr/share/perl/5.20 / /usr/local/lib/site_perl / . 
/ /etc/apache2

precisely so that I would know what the perl module library search paths would be under 
Apache when it runs.