Re: named: 'error sending response: unexpected error'

[Mark Foster <mark@foster.cc>]

John Keimel wrote:

> On Wed, Jul 13, 2005 at 08:25:37AM +0200, Adrian von Bidder wrote:
>  
>
> > | Jul 12 18:41:07 zbasel named[5317]: client 24.93.40.63#38829: error 
> > sending response: unexpected error
> >
> >    
> I see this error when a particular server of mine cannot confirm that it
> sent an answer to a query, most often due to a network problem. See, my
> server occasionally loses its network, so while BIND is still trying to
> send replies, no network is available. It prints the error just like
> you're seeing in the logs. 
>
> I'd imagine that a misconfigured firewall (allow DNS queries, but not
> answers) might also show the same error. 
>
> So, I've seen it and under my circumstances, I consider it harmless. 
>  

Second that. You might be triggering a TCP-based query with such a large 
record set, and it's a well-known that DNS and TCP do not always work as 
they should.
If it is true that your nameservers are truncating the response (no idea 
since you didn't say what domain name), you should probably reduce the 
size of your record set for the round robin or look into using a real 
load balancer.

--
Some days it's just not worth chewing through the restraints...
Mark D. Foster, CISSP <mark@foster.cc>  http://mark.foster.cc/