In the Identity Manager log file, there are several messages about the time difference between the database and vApp machine
"The time difference between the database server for DSN= WPDS and this machine has changed by 76424ms since last computed"
Virtual Appliance 14.x
The time in the Database server and vApp (Identity Manager) have some differences
Check if the time in both vApp machines and Database server has the time in sync
For Virtual Appliance you have the option to enable Network Time Protocol (NTP) in all vApp machines
Configure Network Time Protocol