Today I faced the a weird situation when trying to login to OracleVM Manager 3.0.1 console. OVMM console did show up and provided me login screen. After entering username and password I got a weird internal error claiming login failed. Username and password were the right ones.
After a while of of debugging I noticed that all the passwords had expired from the OracleDB that holds the OracleVM repository.
I logged in as sys user and changed the default profile:
alter profile default limit password_life_time unlimited;
Then altered the passwords for the most important accounts: SYSTEM, OVS.
SYS user seemed to be in ok condition.
Then I restarted the OVMM process (root):
service ovmm stop
service ovmm start
After this login worked fine.