ORA-01110ORA-01111: namefordatafile69isunknown-renametocorrectfile

Today, I has added a datafile of an tablespace with 'alter tablespace tbs_name add datafile' + DATA '8g '. I have Ed a critical warning that the data guard standby machine done which cocould not synchronous the data after a period time.

I viewed the alert log and found that the DG machine's asm disk group has a little space which less then 8g, and can not synchronous the 'create datafile ...'.

So, I added the space of the asm disk group. When I startup the DG instance, encountered the error

MRP0: Background Media Recovery terminated with error 1111Errors in file /u01/app/oracle/diag/rdbms/db4dg/cedb/trace/cedb_pr00_25766.trc:ORA-01111: name for data file 69 is unknown - rename to correct fileORA-01110: data file 69: '/u01/app/oracle/product/11.2.0/db_1/dbs/UNNAMED00069'ORA-01157: cannot identify/lock data file 69 - see DBWR trace fileORA-01111: name for data file 69 is unknown - rename to correct fileORA-01110: data file 69: '/u01/app/oracle/product/11.2.0/db_1/dbs/UNNAMED00069'Managed Standby Recovery not using Real Time ApplySlave exiting with ORA-1111 exception

In order to deal with the erro, I done as the following:

alter system set standby_file_management=manual;alter database create datafile   '/u01/app/oracle/product/11.2.0/db_1/dbs/UNNAMED00069' as '+DATA/db4dg/datafile/tbs_name';  alter system set standby_file_management=auto;alter database recover managed standby database disconnect from session using current logfile;  (11g)alter database recover managed standby database disconnect from session;(10g)