IPA service fails to come up with the error : "named[27587]: Failed to init credentials (Generic error (see e-text))"

Issue

• Started experiencing slowness in IPA DNS services so we stopped the DNS service manually.
• Attempts to restart the ipa service failed with errors below :

named[27587]: starting BIND 9.8.2rc1-RedHat-9.8.2-0.23.rc1.el6_5.1 -u named
named[27587]: built with '--build=x86_64-redhat-linux-gnu' ...
named[27587]: ----------------------------------------------------
named[27587]: BIND 9 is maintained by Internet Systems Consortium,
named[27587]: Inc. (ISC), a non-profit 501(c)(3) public-benefit
named[27587]: corporation.  Support and training for BIND 9 are
named[27587]: available at https://www.isc.org/support
named[27587]: ----------------------------------------------------
named[27587]: adjusted limit on open files from 4096 to 1048576
named[27587]: found 2 CPUs, using 2 worker threads
named[27587]: using up to 4096 sockets
named[27587]: loading configuration from '/etc/named.conf'
named[27587]: using default UDP/IPv4 port range: [1024, 65535]
named[27587]: using default UDP/IPv6 port range: [1024, 65535]
named[27587]: no IPv6 interfaces found
named[27587]: listening on IPv4 interface lo, 127.0.0.1#53
named[27587]: listening on IPv4 interface eth0, x.x.x.x#53
named[27587]: generating session key for dynamic DNS
named[27587]: sizing zone task pool based on 6 zones
named[27587]: /etc/named.conf:12: no forwarders seen; disabling forwarding
named[27587]: set up managed keys zone for view _default, file 'dynamic/managed-keys.bind'
named[27587]: Failed to init credentials (Generic error (see e-text))

• Or following error

named[65393]: set up managed keys zone for view _default, file 'dynamic/managed-keys.bind'
named[65393]: bind to LDAP server failed: Invalid credentials
named[65393]: loading configuration: permission denied
named[65393]: exiting (due to fatal error)