Apache2.so: undefined symbol: modperl_xs_sv2request_rec

Also fails in

Description: Ubuntu 13.10
Release: 13.10

Same failure in

Description: Ubuntu 14.04 LTS
Release: 14.04

Note also that you might get a different error once this missing symbol issue is fixed - this is a part of mod_perl and is meant to be used under apache while servicing web requests, which would be great if it worked. I suppose most people are using commercial alternatives, though, perhaps because no one has been adequately testing things like this.

(Just in case last comment was not clear: it's probably ok if you get a different error after fixing the missing symbol issue. I'll be happy to test an interim release...)

Actually, this problem can be resolved by (as root):

cd /etc/apache2/mods-enabled
ln -s ../mods-available/apreq.load
/etc/init.d/apache2 restart

So this should be classified as a documentation issue.

That said, this is not an easy documentation problem to resolve. To illustrate this, here's a mod_perl page that works:

#!/usr/bin/perl
use Apache2::RequestUtil ();
my $r = Apache2::RequestUtil->request;
$r->content_type("text/plain");
$r->print("works?");

And here is one that fails with the apreq module not loaded:

#!/usr/bin/perl
use Apache2::RequestUtil ();
use Apache2::Upload;
use IO::Handle;
open DBG, ">/tmp/dbg";
DBG->autoflush();
print DBG 1;
my $r = Apache2::RequestUtil->request;
print DBG 2;
my $req = Apache2::Request->new($r);
print DBG 3;
$r->content_type("text/plain");
print DBG 4;
$r->print("works?");
print DBG 5;

The failing program needs those print statements since nothing shows up even in the apache error log for this failure mode.

Probably perldoc Apache2::Upload should document the apreq issue, and the upstream perl developers should get a polite request for a more informative failure mode for this case (for webmin users).

Status changed to 'Confirmed' because the bug affects multiple users.

same problem on Ubuntu 21.10
found the cause was a miss-configuration of mod_perl

not sure of details as I'm not the admin at work