In 12c using cuurent logfile is deprecated and if you issue the below command:
ALTER DATABASE RECOVER managed standby database using current logfile disconnect
You will notice the below warning in the alert log file.
ALTER DATABASE RECOVER managed standby database using current logfile disconnect
You will notice the below warning in the alert log file.
Warning: ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE has been deprecated
Instead of using the current log file, use below command.
SQL> alter database recover managed standby database disconnect nodelay;