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From Carl Eklof <c...@beesw.com>
Subject Re: Intermittent Segfaults
Date Wed, 22 Mar 2006 15:13:47 GMT
FYI, I also got the same error, with the exact same epparse.c.reg file, trying to patch my
2.0.0 release.
 
Thanks,
 
-Carl


----- Original Message ----
From: Gerald Richter <richter@ecos.de>
To: BeeThere Admin <carl@beesw.com>; Hartmaier Alexander <Alexander.Hartmaier@t-systems.at>;
embperl@perl.apache.org
Sent: Tuesday, March 21, 2006 11:53:38 PM
Subject: RE: Intermittent Segfaults


Hi,

Could you please give the attached patch a try and let me know if it fixes
the segfaults.

Gerald


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Gerald Richter            ecos electronic communication services gmbh
IT-Securitylösungen * Webapplikationen mit Apache/Perl/mod_perl/Embperl

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> -----Original Message-----
> From: BeeThere Admin [mailto:admin@beethere.net] 
> Sent: Tuesday, March 21, 2006 12:38 AM
> To: Hartmaier Alexander; embperl@perl.apache.org
> Subject: Re: Intermittent Segfaults
> 
> I don't know the details, it seems to be a pretty general 
> problem. Gerald seems to be on it though. He even said that 
> he was working through the weekend (bless his heart :-)
>  
> The symptom on the user side, at least for me is a completely 
> blank page. It looks like the server sends back a 200 OK, but 
> then nothing else. There doesn't seem to be any way to debug 
> the problem at the Embperl-user side because none of the page 
> code ever gets executed, not even your base.epl (or whatever 
> you call it). A page refresh will usually result in the 
> expected page rendering, but at least for us, this is a 
> critical issue holding a major release, business deals, etc.
>  
> I looked into the logs because a user told me they couldn't 
> get into a section of the site because they only got a blank 
> page. The page seems to be random, but I can easily reproduce 
> the problem in my dev environment now.
>  
> FYI,
>  
> -Carl
>  
> Bee Software LLC
> See us in action at: http://beethere.net/
> 
> ----- Original Message ----
> From: Hartmaier Alexander <Alexander.Hartmaier@t-systems.at>
> To: embperl@perl.apache.org
> Sent: Monday, March 20, 2006 12:50:29 PM
> Subject: RE: Intermittent Segfaults
> 
> 
> I just found out that I have segfaults on my servers too.
> OS is debian testing
> The apache startup message should include all infos you might 
> want to know too:
> [Mon Mar 20 18:27:05 2006] [notice] Apache/2.0.55 (Debian) 
> Embperl/2.1.0 mod_ssl/2.0.55 OpenSSL/0.9.8a 
> mod_apreq2-20051231/2.5.7 mod_perl/2.0.2 Perl/v5.8.8 
> configured -- resuming normal operations
> 
> I've recompiled Embperl today to make sure it uses the 
> current software versions but that didn't help.
> 
> -Alex
> 
> 
> -----Original Message-----
> From: Gerald Richter [mailto:richter@ecos.de]
> Sent: Friday, March 17, 2006 9:16 PM
> To: 'BeeThere Admin'; embperl@perl.apache.org
> Subject: RE: Intermittent Segfaults
> 
> 
> >  
> > I have continued testing, and I can confidently say that the 
> > problem is definitely not an out-of-memory issue. 
> 
> ok
> 
> > The new dev 
> > version you sent is segfaulting about once for every 100 page 
> > requests in dev now, with no load except me clicking around, 
> > on a machine with 2G total RAM and plenty of free memory. 
> >  
> > The segfaults have occurred during pretty much every type of 
> > page request, and also not occurred on those same requests. 
> > Hitting refresh will always result in the page being 
> > correctly sent, with not segfault, on at most a couple pushes.
> >  
> > Did you get the back-traces I sent? 
> 
> Yes. These backtraces are with the new version I sent, right? 
> (I need to
> make sure the line numbers of the backtrace matches my source)
> 
> > I sent them to your 
> > personal account, but I realized that you may check the list 
> > more. Every back-trace points to "EMBPERL2_Node_appendChild 
> > .... at epdom.c:2835" as the point of segfaulting.
> >  
> > The only Embperl tags I ever use are the PerlBlock '[* *], [+ 
> > +], [- -]' tags. Is there someway I can bypass this 'epdom' 
> > code all together? (I don't see any reason for dom-parsing)
> >  
> 
> This code also parses [..] tags, so you will need it. (It 
> never builds a
> full dom tree of your source, it only parses out the tags 
> that you tell
> Embperl to process)
> 
> I have to take a deeper look at the backtraces. I will come 
> back to you as
> soon as possible
> 
> Gerald
> 
> 
> 
> 
> 
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