[moby] Re: [MOBY-dev] Apache2 & mod_perl 2

[Mark Wilkinson]

Hi Jose (c.c. Jason)

My first instinct was a memory problem as well, but I have asked the
sysadmin to look into this and he doesn't think that is the case.  The
Google searches are split between those who say that the errors come
from physical memory problems, and those who say that they are from
Apache incompatibilities.  I've chased down all of the Apache
incompatibilities that I could find, and have done a completely fresh
install of Apache and mod-perl over the weekend, but that hasn't helped.

...if it is a memory problem, it's a hard one to spot!  :-)

M



On Tue, 2005-04-05 at 08:23, José María Fernández González wrote:
> If the segfaults are more or less random, it could be an almost broken
> memory module, which makes jam with some of its bits when it gets hot.
> 
> Are segfaults happening when the server is under heavy load? Or does
> they appear when about an hour has been spent doing almost "nothing"?
> 
> If it is a software problem, a fresh, known stable installation should
> be the answer.
> 
> 	Best Regards,
> 		José María
> 
> Mark Wilkinson wrote:
> > I don't think that Apache/mod_perl are the problem - I think the problem
> > is with the (known) incompatibilities between Apache1 and EXPAT.  This
> > would make some sense, since we recently migrated from XML::DOM to
> > XML::LibXML, and that seems to be when the worst of the symptoms
> > started.
> > 
> > The problem is that I have tried all the fixes for this problem that I
> > could find through Google and none of them have worked so far, so I am
> > left with no other option but to try upgrading in hopes that Apache2 has
> > no incompatibilities (if that really is the problem...).  The concern
> > with doing so is that I know there were incompatibilities between
> > Apache2 and mod_perl a year or so ago when I last tried this, so I am
> > wondering if anyone knows if these have now been resolved.
> > 
> > M
> > 
> > 
> > 
> > On Tue, 2005-04-05 at 07:45, Martin Senger wrote:
> > 
> >>Mark,
> >>   Why would you think that Apache & perl_mod is the cause of the current
> >>problems, considering that Moby Central was running without flaws many
> >>mnths before? What has changed before the current problems started? If you
> >>changed more things now - like having Apache2 - you could never be able to
> >>find what *really* was a problem... Just my 2c...
> >>
> >>   Martin
-- 
Mark Wilkinson
Assistant Professor (Bioinformatics)
Dept. Medical Genetics, UBC, Canada