This is closed, we had a hostname which was not reflecting in DNS entry. Hostname name of primary was added to /etc/host file to fix this connectivity issue.
I am having the same issue , I checked the firewall between master and backup , all the required ports are opened both side -A IN_public_allow -p tcp -m tcp --dport 22 -m conntrack --ctstate NEW -j ACCEPT -A IN_public_allow -p tcp -m tcp --dport 80 -m conntrack --ctstate NEW -j ACCEPT -A IN_public_allow -p tcp -m tcp --dport 3306 -m conntrack --ctstate NEW -j ACCEPT -A IN_public_allow -p tcp -m tcp --dport 4444 -m conntrack --ctstate NEW -j ACCEPT -A IN_public_allow -p tcp -m tcp --dport 4446 -m...