Fwd: Call For Assistance #4 - slapd won't die gracefully, multiple versions.

Matthew Seaman m.seaman at infracaninophile.co.uk
Sat Apr 17 03:44:33 PDT 2004


On Sat, Apr 17, 2004 at 01:22:00AM -0400, Jason Lixfeld wrote:
> I've been having this issue with openldap for over a month now and they 
> folks at openldap seem to think this may be a FreeBSD issue.  Not sure 
> if it's a general FreeBSD issue or an AMD64 issue so it's going to 
> both.
> Can anyone have a look at this and tell me what they think?

It looks to me as if you've discovered quite a tricky bug here.  It's
not clear from the symptoms you describe if the fault is in the
OpenLDAP code, the code of any of the dependencies it links against --
although I think your testing of BDB vs LDBM has eliminated those as
suspects -- or the underlying FreeBSD system libraries.  Neither is it
clear if the problem is a coding mistake in any of those projects, or
perhaps a bug in the compiler.

Now, I assume that egregious errors due to being on a 64bit rather
than a 32bit platform are not likely to happen in the OpenLDAP code,
since it runs on any number of 64bit platforms like solaris-sparc.
Subtle errors are a different matter.  AMD64 is now a tier-1 platform
on FreeBSD, which means it's been through a lot of testing to prove
it's stability and correct operation, but that status is new with 5.x,
so there are undoubtedly plenty of bugs still there to fix.  5.x is
also using gcc-3.3.x as the system compiler, again in a large part for
the ability to support the new tier-1 platforms.  In other words it's
pretty hard to even predict which of those areas is most likely to be
the cause of the problem.

As Kris said, running the program under a debugger -- in the hands of
an expert programmer -- will be the best route towards dignosing the
problem and finding a cure.  If you're not capable of doing that sort
of thing yourself, finding such a person will be your best route to a
proper fix.  If you need the LDAP server for business purposes, then
offering payment would not be out of order.

In the mean time, you need a work-around.  I'm not sure if you can run
FreeBSD 5.x in 32bit mode on an AMD64 box, but that might be a thing
to try.  Compiling the software with different versions of gcc (there
are several available in ports) and with different optimization levels
is worth a go.  Failing that, probably the best thing would be to find
a spare IA32 machine and use that for your server temporarily.  or
even (horrors!) try a different OS on your AMD64 box.



Dr Matthew J Seaman MA, D.Phil.                       26 The Paddocks
                                                      Savill Way
PGP: http://www.infracaninophile.co.uk/pgpkey         Marlow
Tel: +44 1628 476614                                  Bucks., SL7 1TH UK
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