What causes "Could not resolve ... no name for ..." log entries?
I am seeing quite a few lines in my log files on the Puppet CA server like this:
puppet-master: Could not resolve 172.16.216.200: no name for 172.16.216.200
At first I thought it was because the address 172.16.216.200 did not have an associated DNS entry, but that is not the case: it does.
What else might be causing these log entries?