+++ This bug was initially created as a clone of Bug #1664863 +++
Description of problem:
Support for stale-answer-enable and others is missing. Allows responding from cache when authoritative servers are under attack or not responding.
4700. [func] Serving of stale answers is now supported. This
allows named to provide stale cached answers when
the authoritative server is under attack.
See max-stale-ttl, stale-answer-enable,
stale-answer-ttl. [RT #44790]
Check bug #1653111 comment #7 for more details.
Version-Release number of selected component (if applicable):
Upstream has no support for stale cache in 9.11 ESV version, the feature was introduced in 9.12 version.
--- Additional comment from Petr Menšík on 2019-08-29 11:40:50 CEST ---
Previous refractoring of resolver  makes backport hard. Not simple to check it is possible or not, have to decipher which changes would land where in the old code.
Built on rawhide already. No plans to backport it to stable releases now.