[hobbit] Two DNS lookups for a server but one fails

[Ward, Martin]

Hi Henrik,

I compiled that in and installed it but it seems to have messed up all the remote port checks. All my ssh port tests, which are initiated from the server, are now purple, as well as the DNS checks, syslog port checks and others besides.

Rebuilding with the previous version has restored the remote port checks as well as the dual-DNS-check errors.

|\/|artin

> -----Original Message-----
> From: Henrik Størner [mailto:henrik at hswn.dk] 
> Sent: 07 January 2009 13:30
> To: hobbit at hswn.dk
> Subject: Re: [hobbit] Two DNS lookups for a server but one fails
> 
> 
> Hi Martin,
> 
> On Mon, Jan 05, 2009 at 01:58:56PM -0000, Ward, Martin wrote:
> > *** DNS lookup of 'a:smtp.server.com' ***
> > Timeout (channel destroyed)
> > 
> > In this instance it was the A record that failed but in 
> others it is 
> > the NS record. I always get one of the queries back 
> successfully, but 
> > not both.
> > 
> > These were working fine until I upgraded to Xymon 4.2.2 so 
> this looks 
> > like the culprit. Any ideas or suggestions?
> 
> there was a change done in 4.2.2 - backported from the 4.3.x 
> code - to fix a bug that could cause the network tests to 
> lockup while doing the DNS lookups. It is probably that "fix" 
> that causes the problem.
> 
> Going over the DNS code again, I think there's some flawed 
> logic in how it handles the lookups. Could you try the 
> attached version of 
> xymon-4.2.2/bbnet/dns.c ? Just copy it on top of the existing 
> one, then run "make" and copy the resulting 
> xymon-4.2.2/bbnet/bbtest-net 
> binary to your ~xymon/server/bin/ directory (save the 
> existing one just in case this completely breaks stuff).
> 
> 
> Let me know if that is better.
> 
> 
> Regards,
> Henrik
> 
> 


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