No server available message during undercloud installation

Issue

While installing the undercloud using "openstack undercloud install", I get the following messages on console.

haproxy[22552]: proxy ironic has no server available!


Message from syslogd@director at Nov  7 11:44:38 ...
 haproxy[22552]:proxy ironic has no server available!

Broadcast message from systemd-journald@director.example.com (Thu 2019-11-07 11:44:38 PST):

haproxy[22552]: proxy nova_placement has no server available!
...truncated...