[EP-tech] Apache and PerlSwitches

Matthew Brady Matthew.Brady at usq.edu.au
Wed May 13 08:51:39 BST 2020


Hi David,

Always something new to learn... Its in the list, last entry...

$ httpd -M
Loaded Modules:
 core_module (static)
 so_module (static)
 http_module (static)
...
...
perl_module (shared)


________________________________
From: eprints-tech-bounces at ecs.soton.ac.uk <eprints-tech-bounces at ecs.soton.ac.uk> on behalf of David R Newman via Eprints-tech <eprints-tech at ecs.soton.ac.uk>
Sent: Wednesday, May 13, 2020 5:45 PM
To: eprints-tech at ecs.soton.ac.uk <eprints-tech at ecs.soton.ac.uk>; Matthew Brady <Matthew.Brady at usq.edu.au>
Subject: Re: [EP-tech] Apache and PerlSwitches


Hi Matt,


It is possible the module is installed but not loaded.  You can check by running one of the following commands:


RedHat/CentOS/Fedora: httpd -M

Debian/Ubuntu: source /etc/apache2/envvars && apache2 -M


You should see perl_module in the list returned.  My general experience is that Mod Perl is enabled automatically on RedHat-based Linux OS but often you need to run "a2enmod perl" on Debian based systems.  On RedHat based systems there should be the file /etc/httpd/conf.modules.d/02-perl.conf that loads Mod Perl.  On Debian-based systems there should be a symlinked file in /etc/apache2/mods-enabled/ called perl.load that symlinks to /etc/apache2/mods-available/perl.load.


Regards


David Newman


On 13/05/2020 08:29, Matthew Brady via Eprints-tech wrote:
Hi Yuri,

Yes, seems to be

$ yum list installed | grep mod_perl

mod_perl.x86_64                      2.0.11-1.el7               @epel
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From: eprints-tech-bounces at ecs.soton.ac.uk<mailto:eprints-tech-bounces at ecs.soton.ac.uk> <eprints-tech-bounces at ecs.soton.ac.uk><mailto:eprints-tech-bounces at ecs.soton.ac.uk> on behalf of Yuri via Eprints-tech <eprints-tech at ecs.soton.ac.uk><mailto:eprints-tech at ecs.soton.ac.uk>
Sent: Wednesday, May 13, 2020 4:38 PM
To: eprints-tech at ecs.soton.ac.uk<mailto:eprints-tech at ecs.soton.ac.uk> <eprints-tech at ecs.soton.ac.uk><mailto:eprints-tech at ecs.soton.ac.uk>
Subject: Re: [EP-tech] Apache and PerlSwitches

is mod_perl installed?


Il 13/05/20 04:17, Matthew Brady via Eprints-tech ha scritto:
> Hi All,
>
> We are in the process of running up new servers to migrate across to,
> and I am getting a problem when starting Apache.
>
> Syntax error on line 17 of /opt/eprints3/cfg/apache.conf:
>
> Line 17 contains:
>
>     PerlSwitches -I/opt/eprints3/perl_lib
>
>
> I can run epadmin with various options, which seems to indicate its
> loading the EPrints::SystemSettings into $conf and can connect to
> database etc...
>
>     $ ./epadmin --verbose test repoep3
>
>     Starting EPrints Repository.
>     Connecting to DB ... done.
>     PID: 10718
>     Everything seems OK.
>
>
>     $ ./epadmin update_dry_run repoep3
>     Dry run: Fixed saved_search__rindex.field collation
>     Dry run: Fixed document__rindex.field collation
>     Dry run: Fixed author__rindex.field collation
>     Dry run: Fixed user__rindex.field collation
>     Dry run: Fixed eprint__rindex.field collation
>     Dry run: Fixed request__rindex.field collation
>     Dry run: Fixed subject__rindex.field collation
>     Dry run: 0 datasets added
>     Dry run: 0 fields added
>     Dry run: 0 counters were added
>
>
> As this is a completely new system, there are lots of variables at play...
> Upgraded OS, Upgraded Apache  2.2 to 2.4
> I have installed the same Perl modules on this system as the existing
> systems, but I am at a loss where to start to investigate the cause...
>
> If anyone has any thoughts on where to start troubleshooting this, I'm
> all ears.
>
>
> Cheers
>
> Matt.
>
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