[ovirt-users] Admin user locked

Hi Team, What is the reason for the following lock error for admin user? 2018-04-16 21:12:38,278+05 INFO [org.ovirt.engine.extension.aaa.jdbc.core.Authentication] (default task-17) [] locking user: admin due to interval failures I am able to unlock it. But I would like to know the reason for this error? Thanks, Hari