ORA-01111: name for data file 975 is unknown - rename to correct file MRP0: Background Media Recovery terminated with error 1111

 ORA-01111: name for data file 975 is unknown - rename to correct file  MRP0: Background Media Recovery terminated with error 1111

Issue: 

Standby database throws below errors and stops the MRP. 

MRP0: Background Media Recovery terminated with error 1111

Errors in file /u01/app/oraprod/diag/diag/rdbms/sprod/SPROD1/trace/SPROD1_pr00_23061.trc:

ORA-01111: name for data file 975 is unknown - rename to correct file

ORA-01110: data file 975: '/u01/app/oraprod/11.2.0.4/dbs/UNNAMED00975'

ORA-01157: cannot identify/lock data file 975 - see DBWR trace file

ORA-01111: name for data file 975 is unknown - rename to correct file

ORA-01110: data file 975: '/u01/app/oraprod/11.2.0.4/dbs/UNNAMED00975'

Recovery Slave PR00 previously exited with exception 1111

Solution:

- Please cancel the managed recovery by

SQL>ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL;

- Set standby_file_management=manual

SQL>ALTER SYSTEM SET STANDBY_FILE_MANAGEMENT=MANUAL;

If the physical standby database is RAC, then please make the change to all standby instances.

SQL>ALTER SYSTEM SET STANDBY_FILE_MANAGEMENT=MANUAL SID='*';

alter database create datafile '/u01/app/oraprod/11.2.0.4/dbs/UNNAMED00975' as '+DATA_DG' size 30g;

- Set standby_file_management=auto 

SQL>ALTER SYSTEM SET STANDBY_FILE_MANAGEMENT=AUTO;

If the physical standby database is RAC, then please make the change to all standby instances.   

SQL>ALTER SYSTEM SET STANDBY_FILE_MANAGEMENT=AUTO SID='*';

- Start managed recovery by  

SQL>ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT;