Problem with BIND 9.10.1-P1 recursion limits

Stuart Henderson stu at
Tue Dec 9 17:46:36 UTC 2014

On 2014/12/09 17:37, Evan Hunt wrote:
> On Tue, Dec 09, 2014 at 05:17:52PM +0000, Tony Finch wrote:
> > Yes, I could reproduce it after flushing my cache. Had to wait five
> > minutes before the queries succeeded, which seems unpleasantly long.
> > I don't know where that time comes from - the ARM says the default
> > servfail-ttl is 10s.
> You're running unreleased code, there.  "Servfail-ttl" is a feature slated
> for 9.11, but the recursion limits have only been added in the past few
> weeks as a patch for the infinite DNS bug, and we're clearly going to have
> to modify the SERVFAIL caching feature in light of this new reality.  (We
> might arrange for SERVFAILs that occur as a result of recursion limits not
> to be cached.)
> When I tested this on 9.9, I got the problem with on the first
> query, but it succeeded on the second.

It's 5 minutes with 9.10.1-P1 as well.

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