rpcbind service fails to start with below error message in /var/log/messages
I got this error the other day while working on Red Hat Enterprise Linux 7.3 and after digging for a while I got to know there is a sort of a BUG in RHEL 7.3.
I found a BUG reported for this issue and I was facing the exact one.
As explained by one of the engineers on the above page
Just to summarise if you have disabled ipv6 using your sysctl configurations then it is disabled only on kernel level but not via GRUB so it is not disabled completely hence systemd will attempt to make a connection on port 111 on any ipv6 address, [::]:111 during the boot up.
To know more on how to disable ipv6 follow below link
How to disable or enable ipv6 in Linux