named[353]: sysquery: no addrs found for root NS ..........

[horio shoichi]

On Tue, 7 Sep 2004 14:24:37 +0300
"Toomas Aas" <toomas.aas at raad.tartu.ee> wrote:
> Hi!
> 
> > >From time to time I get this:
> > 
> > Sep  7 12:57:44 it named[353]: sysquery: no addrs found for root NS (d.root-servers.net)
> > Sep  7 12:57:44 it named[353]: sysquery: no addrs found for root NS (a.root-servers.net)
> > Sep  7 12:57:44 it named[353]: sysquery: no addrs found for root NS (c.root-servers.net)
> > Sep  7 12:57:45 it named[353]: sysquery: no addrs found for root NS (h.root-servers.net)
> > Sep  7 12:57:45 it named[353]: sysquery: no addrs found for root NS (f.root-servers.net)
> > Sep  7 12:57:45 it named[353]: sysquery: no addrs found for root NS (b.root-servers.net)
> > 
> 
> This problem plagued me for a long time on several FreeBSD 4 servers 
> running BIND 8 from the base system. Google finds numerous discussions 
> on this problem in various lists/newsgroups but a solution is rarely 
> offered.
> 
> Finally, I found someone's theory in a NetBSD (or was it OpenBSD) 
> forum. I can't tell whether it is true or not, but it makes sense 
> to me.
> 
> If your BIND is configured to use a forwarder and this forwarder is 
> really good then BIND (almost) never needs to contact the root servers. 
> The root zone times out in memory and it is not reloaded from disk. It 
> is only loaded when BIND is started. Thus, if your BIND finally needs 
> to contact a root name server after a long time of getting all 
> responses from forwarder, it turns out that the data for root zone is 
> not available...
> 
> Now, as I said, I cannot tell whether this theory is true or not. What 
> I can say is that on all 4 machines where I run BIND I configured 
> one of two workarounds:
> - use "forward only" so you *never* need to check the root zone
> - do not use forwarders at all so you check the root zone fairly 
>   frequently.
> 
> I did this almost a year ago, and after that I never have had this 
> problem again. HTH.
> --
> Toomas Aas | toomas.aas at raad.tartu.ee | http://www.raad.tartu.ee/~toomas/
> * Press any key to continue or any other key to quit.
> 
> _______________________________________________
> freebsd-questions at freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-questions
> To unsubscribe, send any mail to "freebsd-questions-unsubscribe at freebsd.org"
> 

Hmm, then the easiest cure against OP's would be
periodically (say, per week) requesting purposely
wrong request (e.g., nslookup example.heh) ? 


horio shoichi