Problems with FreeBSD and Nagios

[Kyle Sexton]

On 12/14/06, Andreas Ericsson <ae at op5.se> wrote:
> Jonathan Call wrote:
> >
> > Given your ideas and some google work I seem to have found my problem:
> >
> > http://lists.freebsd.org/pipermail/freebsd-hackers/2005-August/013247.ht
> > ml
> >
> > Not a pretty discussion. :(
> >
>
> Nope. Definitely not.
>
> The problem for Nagios is that threading was added after the fact so
> nagios actually breaks some of the *strong* recommendations on what to
> do and what not to do in a threaded application after a fork().
>
> The problem for *BSD and their thread implementation of the thread
> library is that Nagios actually works everywhere but on *BSD, and it
> *often* works there too, but not always. This "often-but-not-always" is
> usually a sign of a broken implementation, although exactly
> "often-but-not-always" is a sign of the errors you'll run into when you
> do what Nagios does post-fork().
>
> I don't know of any other program that has the same problem on *BSD, but
> it would be interesting to see if there's a common pattern so one can
> pinpoint the exact pattern that causes the lock contention and races. It
> would, from a practical point of view, be best to patch it in the
> library, as that is a fix that would work for all possible future
> problems as well, although it's technically more correct to fix it in
> Nagios.
>
> Ugly discussion indeed.
>
>
> > I'll try using a non SMP kernel to see it might help. If it doesn't this
> > pretty much renders Nagios useless on FreeBSD. (Which makes me wonder
> > why they even bother maintaining it in ports?)
> >
>
> Out of curiousity, do you use passive checks, active checks or a mix of
> both in your setup?
>
> --
> Andreas Ericsson                   andreas.ericsson at op5.se
> OP5 AB                             www.op5.se
> Tel: +46 8-230225                  Fax: +46 8-230231
>
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Was there ever a solution found to this problem?

-- 
Kyle Sexton

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