Re: [mp1] Method handler that eventually seems to "forget" it's a method handler

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From: Martin Moss
Subject: Re: [mp1] Method handler that eventually seems to "forget" it's a method handler
Date: 15:11 on 02 Feb 2005
I've seen this problem and never got to the bottom of
it, on a redhat box with 5.8.3 (I think) and same
apache and mod_perl,

Marty




 --- Andrew Green <andrew@xxxxxxxx.xx.xx> wrote: 
> Hi,
> 
> I seem to have a bizarre problem with method
> handlers on my setup.  I 
> have a set of different handlers, all of which are
> method handlers so 
> that I can easily inherit shared code across a
> collection of different 
> installations of my application on the same server.
> 
> The first handler to get invoked is a
> PerlTransHandler -- everything 
> works fine (or at least seems to) for quite some
> time, but then the 
> handler begins "forgetting" that it's a method
> handler, and instead of 
> the class being passed before $r, $r becomes the
> first thing passed.  
> At least, that seems to be what's happening.  Is
> this a known problem?
> 
> My setup is as follows:
> 
> 	 Perl 5.8.0 (Red Hat EL 3 default)
> 	 Apache/1.3.29
> 	 mod_perl/1.29
> 
> 
> Here's what I imagine to be the relevant bits of
> httpd.conf:
> 
> 	MinSpareServers 10
> 	MaxSpareServers 20
> 	StartServers 10
> 	MaxClients 60
> 	MaxRequestsPerChild 1000
> 	...
> 	<VirtualHost xxx>
> 		PerlTransHandler MyApp::MyInstall::Dispatcher
> 		...
> 
> 
> Here's the relevant bits of Dispatcher.pm:
> 
> 	package MyApp::MyInstall::Dispatcher;
> 
> 	use strict;
> 	use Apache::Constants qw(OK DECLINED NOT_FOUND
> REDIRECT FORBIDDEN);
> 	use Apache::URI;
> 
> 	our @ISA = qw(MyApp::Core::Dispatcher);
> 
> 	1;
> 
> 	####
> 
> 	sub handler ($$) {
> 
> 		my ($class,$r) = @_;
> 		return DECLINED unless ($r->is_initial_req());
> 		...
> 
> 
> And here's the error (that only starts appearing
> after the server's 
> been running for a while:
> 
> 	Can't call method "is_initial_req" on an undefined
> value...
> 
> The error then points to the line quoted above.  Of
> course, Apache 
> never gets to other handlers later in the sequence,
> so I can't easily 
> see whether the problem is limited to TransHandlers,
> or whether all my 
> method handlers would stop acting as such. 
> Restarting the server makes 
> the problem go away -- for a while!
> 
> I'd really like to avoid having to upgrade/change
> Perl or mod_perl if 
> at all possible.  Nonetheless, any help, advice or
> guidance anyone can 
> provide would be very much appreciated.
> 
> Cheers,
> Andrew.
>  


	
	
		
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Re: [mp1] Method handler that eventually seems to "forget" it's a method handler
Martin Moss 15:11 on 02 Feb 2005

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