Re: mod_perl causing seg faults in apache2?

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Grant wrote:
>>>I tracked down an unofficial mod_perl-2.0.0rc5 ebuild and followed
>>>this stuff to the letter:
>>>
>>>http://perl.apache.org/docs/2.0/rename.html
>>>
>>>but got nothing but 500s.  You're right it doesn't make sense to track
>>>down segfaults for old software, but upgrading right now seems
>>>impossible.  I'm backing way off this.  Thanks for your help though.
>>
>>Or you could explain what the problems are, posting the relevant bits of
>>your error_log so we could help you fix the problems. Mind you, 2.0.0 is
>>planned to be released next week.
> 
> 
> I would really love to get rid of those segfaults.  My store gets
> about 800 visitors/days and my error_log shows about 100 segs/day. 
> The segs look like 404s in IE so I must be losing a lot of business.

You mean you are updating the live server with an untested code? or do you 
just say that that's what you have in production now?

> It looks like when I set up 2.0.0rc5 I was getting one type of error,
> that stopped, and then another type of error.  I bet that correlates
> to me setting up 2.0.0rc5, starting to roll back to 1.99.17, and then
> setting 2.0.0rc5 back up when I realized I needed to try removing
> 1.99.17.

when you get this kind of random behavior you should start the server in a 
single server mode, in which case you have only one process and all errors 
are seen right away. See the online docs for details.

> The first type of error was like this:
> 
> failed to resolve handler `Interchange::Link': Bareword
> "Apache2::Const::OK" not allowed while "strict subs" in use at
> /usr/lib/perl5/vendor_perl/5.8.5/i686-linux/ModPerl/RegistryCooker.pm
> line 161.\nBareword "Apache2::Const::OK" not allowed while "strict
> subs" in use at
> /usr/lib/perl5/vendor_perl/5.8.5/i686-linux/ModPerl/RegistryCooker.pm
> line 163.\nBareword "Apache2::Const::OK" not allowed while "strict
> subs" in use at
> /usr/lib/perl5/vendor_perl/5.8.5/i686-linux/ModPerl/RegistryCooker.pm
> line 171.\nBEGIN not safe after errors--compilation aborted at
> /usr/lib/perl5/vendor_perl/5.8.5/i686-linux/ModPerl/RegistryCooker.pm
> line 201.\nCompilation failed in require at (eval 3) line
> 3.\n\t...propagated at /usr/lib/perl5/5.8.5/base.pm line 85.\nBEGIN
> failed--compilation aborted at
> /usr/lib/perl5/vendor_perl/5.8.5/i686-linux/ModPerl/Registry.pm line
> 25.\nCompilation failed in require at
> /usr/lib/perl5/site_perl/5.8.5/Interchange/Link.pm line 27.\nBEGIN
> failed--compilation aborted at
> /usr/lib/perl5/site_perl/5.8.5/Interchange/Link.pm line
> 27.\nCompilation failed in require at (eval 2) line 3.\n, referer:

Hmm, we just saw this one a few days ago in another report. I've suggested 
that the user had a mixed mp2 build where the pre-RC5 install was getting 
in the way. Make sure that you nuke all mod_perl modules from 
/usr/lib/perl5/ and then do a fresh install. Any chance with that?

I'm pretty sure you get this error because mp2-pre-RC5 didn't have 
Apache2::Const::OK, but it was Apache::OK.

> and the second was like this:
> 
> failed to resolve handler `Interchange::Link': Can't locate
> ModPerl/Registry.pm in @INC (@INC contains:
> /usr/lib/perl5/5.8.5/i686-linux /usr/lib/perl5/5.8.5
> /usr/lib/perl5/site_perl/5.8.5/i686-linux
> /usr/lib/perl5/site_perl/5.8.5 /usr/lib/perl5/site_perl
> /usr/lib/perl5/vendor_perl/5.8.5/i686-linux
> /usr/lib/perl5/vendor_perl/5.8.5 /usr/lib/perl5/vendor_perl .
> /usr/lib/apache2/ /usr/lib/apache2/lib/perl) at
> /usr/lib/perl5/site_perl/5.8.5/Interchange/Link.pm line 27.\nBEGIN
> failed--compilation aborted at
> /usr/lib/perl5/site_perl/5.8.5/Interchange/Link.pm line
> 27.\nCompilation failed in require at (eval 2) line 3.\n, referer:
> 
> What do you think?

Well, where ModPerl/Registry.pm is? What find(1) says?

        -- 
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Stas Bekman            JAm_pH ------> Just Another mod_perl Hacker
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