You can use also this:
# curl ftp://ftp.internic.net/domain/named.cache > /etc/bind/db.root
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https://bugs.launchpad.net/bugs/1531438
Title:
/etc/bind/db.root is out of date on Trusty
I updated db.root with
# dig +bufsize=1200 +norec NS . @a.root-servers.net > /etc/bind/db.root
# rndc reload
now the log messages are gone.
general: warning: checkhints: view xxx: h.root-servers.net/
(2001:500:1::53) missing from hints
general: warning: checkhints: view xxx: h.root-servers.n