If you have recently restored your Internal Database or moved it to a new system. There could be problems with the hpdp and hpdpidb_app user passwords when authenticating to access Media and devices database.
If you see authentication problems in the AppServer log files (run.log):
Access Denied:Unauthenticated caller:null: java.lang.SecurityException:
You can set new passwords for these users by running this:
omnidbutil -set_passwd hpdp -pass MyNewPassword
omnidbutil -set_passwd hpdpidb_app -pass MyNewPassword
This should update the standalone.xml file so the correct passwords are stored there and the authentication issue should be resolved.