ORA-12527: TNS:listener: all instances are in

admin

ORA-12527:TNS:listener: all instances are in restricted mode or blocking new
connections
Cause: All appropriate database instances supporting theservice requested by the
client reported that they either were in restricted mode or were blocking thenew
connections. The Listener does not allow connections to such instances. This
condition may be temporary, such as at instance startup.
Action: Attemptthe connection again. If error persists, then contact the database
administrator to check the status of the instances.