how to log all recursive query responses?

[JINMEI Tatuya / 神明達哉]

At Fri, 08 Aug 2008 16:56:25 -0700,
"David Sparks" <dave at ca.sophos.com> wrote:
> 
> > If, on the other hand, you're trying to answer the question "why do I 
> > get a SERVFAIL, some of the time, for some names, seemingly at random?", 
> > then I don't know that a targeted tcpdump is going to help. You might 
> > have to capture *everything*, detect the error, and then wade through 
> > the data later.
> 
> This is exactly the problem.  Is there some way to get named to dump its 
> internal state so you can see why its returning a (cached?) SERVFAIL for what 
> should be a working query?  When I run rndc dumpdb and look at the output I 
> can't find anything about the query its returning SERVFAIL for, is there some 
> extra cache or rndc dumpdb flag I need to use?
> 
> This problem usually only happens on the busier of two named instances and 
> only after a week or so of uptime.  If no-one else knows of this problem I 
> guess I need to start collecting more data.

Which version of BIND are you using?

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JINMEI, Tatuya
Internet Systems Consortium, Inc.