RHEL machine is getting powered off automatically with 'gnome-power-manager: (root) Gnome logout dialog, Cause: You pressed the power button'

Issue

• Even though there is no one has pressed the power button, this message is shown sometimes and then power goes down.
• You can see this message in /var/log/message:

"gnome-power-manager: (root) Gnome logout dialog, Cause: You pressed the power button".