[Xymon] c-ares

[Mark Felder]

On Fri, Nov 1, 2013, at 15:43, John Thurston wrote:
> On 11/1/2013 10:11 AM, John Thurston wrote:
> > On 11/1/2013 9:35 AM, Mark Felder wrote:
> >> Is there any hope of getting xymon to compile against the system
> >> provided c-ares, or is xymon always going to bundle it? Just seems like
> >> it would be more efficient to use the system-provided c-ares if it's
> >> there...
> >
> > It's funny you bring this up right now. I am currently struggling with
> > my pre-production xymon instance. The only way I seem able to get it to
> > behave is to start xymonnet with --no-ares. When using c-ares, I
> > routinely get hundreds of test failures due to inability to resolve names.
> 
> I've been working on this today and have found the undocumented option 
> to xymonnet "--maxdnsqueue". With this, I can limit the number of 
> queries xymonnet sends to name servers in each batch. When I set it to 
> =10, I get solid results. When I set it to =25 (or higher), I get 
> hundreds of name resolution failures.
> 
> When I use --no-ares, it also works fine.
> 
> My original question remains, "Why is c-ares the default rather than the 
> system resolver?" But more important is the practical question . . .
> 
> Which way should I go:
>    --no-ares and use the name server caching daemon (nscd) in Solaris?
>    --maxdnsqueue and hope it becomes documented and not deleted?
> 

Honestly, I'd ask Henrik directly