[rt-users] RT3 failure after RH4 updates -- SOLVED

[Stuart J. Browne]

> > > We're using RT 3.6.0 with mod_perl-2.0.2, and up until 
> > > yesterday, it was working fine.
> > 
> > Make sure your Apache perl modules are up-to-date, in
> > particular the perl-libapreq2 RPM
> 
> Never had that package installed.
> 
> ... And as a follow-up, I found the package and installed it, 
> still getting the same error ..

Was completely unrelated to this.

After trying this, I downgraded all the packages to their pre-update
versions, and tried it all again.  It all failed, this time failing to find
the 'content_type' method of 'Apache2::RequestRec'.

So I went hunting.  After muddling through the Wiki, and not really finding
anything suitable there, I went back to reading the mod_perl2 documentation,
and came across 'mod_perl 2.0 renaming'
(http://perl.apache.org/docs/2.0/rename.html).

At the bottom of the article, it mentions this:

	"* In a script or module, replace Apache->request() by
	Apache2::RequestUtil->request() and Apache->server() by
	Apache2::ServerUtil->server()."

Having trawled through 'CGI.pm' yesterday, I noticed that this wasn't what
was happening after the update(s).

Even though the latest RHEL4 updates upgrades Perl to a different sub-build
within RH's source tree (5.8.5-36.el4_5.2 as against what we were using,
5.8.5-36.RHEL4), this of course replaces the version of 'CGI.pm' that's in
use with their distributed one, an old v3.05.

CGI.pm -> 3.05 (as distributed with the EL4 'perl' RPM):

314:  if ($MOD_PERL) {
315:    $self->r(Apache->request) unless $self->r;
316:    my $r = $self->r;
317:    if ($MOD_PERL == 1) {
318:      $r->register_cleanup(\&CGI::_reset_globals);
319:    }
320:    else {
321:      # XXX: once we have the new API
322:      # will do a real PerlOptions -SetupEnv check
323:      $r->subprocess_env unless exists $ENV{REQUEST_METHOD};
324:      $r->pool->cleanup_register(\&CGI::_reset_globals);
325:    }
326:    undef $NPH;
327:  }

In newer versions of CGI.pm (3.29 in this case), it looks like this:

350:  if ($MOD_PERL) {
351:    if ($MOD_PERL == 1) {
352:      $self->r(Apache->request) unless $self->r;
353:      my $r = $self->r;
354:      $r->register_cleanup(\&CGI::_reset_globals);
355:    }
356:    else {
357:      # XXX: once we have the new API
358:      # will do a real PerlOptions -SetupEnv check
359:      $self->r(Apache2::RequestUtil->request) unless $self->r;
360:      my $r = $self->r;
361:      $r->subprocess_env unless exists $ENV{REQUEST_METHOD};
362:      $r->pool->cleanup_register(\&CGI::_reset_globals);
363:    }
364:    undef $NPH;
365:  }

It seems somewhere in the past, I upgraded 'CGI.pm' (and associated other
pieces) to a newer mod_perl2 happy version, and didn't write it down in an
obvious place.

Anyway, thanks to all who read this thead.

Stuart Browne