yppasswdd not running on nis master host on centos 7

1) Make sure you have the correct DNS entries and hosts file entries

# yppasswd
yppasswd: yppasswdd not running on NIS master host

2) Include Master server and slave server details in /etc/hosts file.

# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
#::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
134.18.X.X  testclient.wing.com testclient
134.18.X.X  testslave.wing.com testslave
134.18.X.X  testmaster.wing.com  testmaster

3) Now it works

# yppasswd
Changing NIS account information for dumper on testserver.
Please enter old password:
Changing NIS password for dumper on testserver.
Please enter new password: