I typed the following commands on the Linux terminal for both servers, namely test01 and test02.
useradd -g hacluster -d /home/hacluster -m hacluster
On test01, the following entry was found in /etc/passwd
On test02, the following entry was found in /etc/passwd
I rebooted both test01 and test02. After reboot, I confirmed that the entries were still available in /etc/passwd for both servers. However the crash still occurs.