The named service fails to start at boot with 'address not available'

Issue

• The named service fails to start at system boot.

  Aug 14 18:17:58 node1.example.com named[4258]: could not get query source dispatcher (x.x.x.x#0)
  Aug 14 18:17:58 node1.example.com named[4258]: loading configuration: address not available
  Aug 14 18:17:58 node1.example.com named[4258]: exiting (due to fatal error)
  Aug 14 18:17:58 node1.example.com systemd[1]: named.service: Control process exited, code=exited status=1
  Aug 14 18:17:58 node1.example.com systemd[1]: named.service: Failed with result 'exit-code'.
  

• The named reports 'could not get query source dispatcher' and 'loading configuration: address not available' during system boot.