startup mount;
alter database recover automatic standby database until cancel;
alter database recover automatic cancel;


ORA-01081: cannot start already-running ORACLE - shut it down first
alter database recover automatic standby database until cancel
*
ERROR at line 1:
ORA-00279: change 5329849953 generated at 10/24/2019 02:17:15 needed for thread
1
ORA-00289: suggestion : /u04/archive/1_36748_785270236.dbf
ORA-00280: change 5329849953 for thread 1 is in sequence #36748
ORA-00278: log file '/u04/archive/1_36748_785270236.dbf' no longer needed for
this recovery
ORA-00308: cannot open archived log '/u04/archive/1_36748_785270236.dbf'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3