named daemon did started after upgrade bind 8.1.2 to 9.2.0

[Muhammad Yaqoob_2]

Hi,
Could any one help to look into this issue, I upgraded bind 8.1.2 to 9.2.0, after installation named daemon is not starting, here is error message from syslog.

named[7039]: starting BIND 9.2.0
named[7039]: using 6 CPUs
named[7039]: loading configuration from '/etc/named.conf'
named[7039]: /etc/named.conf:4: option 'check-names' is not implemented
named[7039]: /etc/named.conf:5: option 'check-names' is not implemented
named[7039]: no IPv6 interfaces found
named[7039]: listening on IPv4 interface lan11, 172.19.132.34#53
named[7039]: listening on IPv4 interface lan2, 172.19.130.2#53
named[7039]: listening on IPv4 interface lan1, 172.19.129.2#53
named[7039]: listening on IPv4 interface lan8, 143.242.125.2#53
named[7039]: listening on IPv4 interface lo0, 127.0.0.1#53
named[7039]: listening on IPv4 interface lan5, 172.19.131.2#53
named[7039]: dns_master_load: db.cache:15: no current owner name
named[7039]: could not configure root hints from 'db.cache': no owner
named[7039]: loading configuration: no owner
named[7039]: exiting (due to fatal error)

[Muhammad Yaqoob_2]

after following change in db.cache file named started and its working fine.

. 99999999 IN NS pri-dns.com.
. 99999999 IN NS pri-dns-com.

basically we added . (dots) in front of these lines.