On 17 May 2018 at 17:05, Rob Moser <rob.mo...@nau.edu> wrote: > We're running a series of RHEL 7.4 machines (kernel version > 3.10.0-693.1.1.el7.x86_64) running bind version 9.9.4-RedHat-9.9.4-51.el7. > Our configuration consists of a hidden master and three hidden > slave/recursive resolvers. I'm getting a LOT of errors on the slaves that > look like: > > 17-May-2018 13:27:28.421 general: info: zone > 34.22.10.in-addr.arpa/IN/internal-view: > refresh: failure trying master 10.20.30.3#53 (source 0.0.0.0#0): operation > canceled > > In addition to checking for firewalls and other stateful network devices as Tony mentions, you should also have a look at the condition of the network in between the hosts. That feels a lot like moderate packet loss, or extreme latency, to me.
Are these machines all on the same LAN? Are there multiple networks in between them?
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