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Description of problem:
Sssd AD (and probably IPA) provider's failing dynamic DNS updates are not retried, another update attempt is only done after refresh interval.

With default refresh interval, a failed update means than new or changed host DNS records wouldn't be created for at least another 24 hours.

Version-Release number of selected component (if applicable):
1.11.2-29.el7.x86_64

How reproducible:
Always.

Note for potential implementation - http://tools.ietf.org/html/rfc1536#section-1 :
[...]
   Both name servers and stub
   resolvers should, therefore, implement some kind of a retransmission
   policy based on round trip time estimates of the name servers. The
   client should back-off exponentially, probably to a maximum timeout
   value.
[...]

Note that nsupdate, by default, seem to do 3 attempts to do the update, with 3 seconds in between. So, sssd shouldn't do it, but indeed some exponential retry scheme might be used instead.

I'm not against three successive attempts with timeout = 3 seconds but then the timeout raise exponentially.

Upstream ticket:
https://fedorahosted.org/sssd/ticket/2206

Makes sense, but not too urgent for 7.3

Since this problem is already tracked in an upstream ticket and this bugzilla is not being planned for any immediate release either in RHEL or upstream, I'm closing this bugzilla with the resolution UPSTREAM.

Please reopen this bugzilla report if you disagree.