Re: slapd quits under heavy load

[Quanah Gibson-Mount <quanah@stanford.edu>]

--On Tuesday, March 14, 2006 1:08 PM -0800 Herb Hrowal <hhrowal@gmail.com> 
wrote:

> > What version of OpenLDAP are you running?  What operating system are you
> > running under?
> >
> > That particular bit of code was to address a *bug* in the /Solaris
> > Kernel/. Basically, that clause is only going to get triggered when
> > there are serious problems with your OS.
> >
> > --Quanah
> >
> > --
> > Quanah Gibson-Mount
> > Principal Software Developer
> > ITS/Shared Application Services
> > Stanford University
> > GnuPG Public Key: http://www.stanford.edu/~quanah/pgp.html
>
> We're running Openldap 2.2.23 under Solaris 8 Generic_108528-26.
> However, the section of code above was copied from OpenLDAP 2.3.17 and
> is virtually identical to the same section in 2.2.23. We run on
> various hardware configurations including V210, 280r, and 440 and they
> all exhibit the same behaviour.
>
> What is the bug in the kernel that you were trying to work around? Is
> there a better way to address it? Does it even exist in the latest
> patches?

Yes, this bug exists in all Solaris 8 kernels that I've used.

> Our work around for slapd quitting is to have a watchdog process
> relaunch it whenever it quits, but we would like to move away from
> that method of keeping it running.

You need to upgrade to 2.3.20, which has a workaround for the problems in 
the Solaris kernel.  The problem is that the kernel will allow selects on 
filehandles that are no longer in existence.

--Quanah


--
Quanah Gibson-Mount
Principal Software Developer
ITS/Shared Application Services
Stanford University
GnuPG Public Key: http://www.stanford.edu/~quanah/pgp.html