Standby logfile missing error

Question

Hello all,
I am getting this following error in standby alertlog file.
ORA-00313: open failed for members of log group 8 of thread 2
ORA-00312: online log 8 thread 2: '+DG_FLASH/hsstl/onlinelog/group_8.273.779638759'
ORA-17503: ksfdopn:2 Failed to open file +DG_FLASH/hsstl/onlinelog/group_8.273.779638759
ORA-15012: ASM file '+DG_FLASH/hsipstl/onlinelog/group_8.273.779638759' does not exist
ORA-00312: online log 8 thread 2: '+DG_DATA/hsstl/onlinelog/group_8.1766.779638759'
ORA-17503: ksfdopn:2 Failed to open file +DG_DATA/hsstl/onlinelog/group_8.1766.779638759
ORA-15012: ASM file '+DG_DATA/hsipstl/onlinelog/group_8.1766.779638759' does not exist
When i manually check the diskgroup '+DG_FLASH, +DG_DATA, i can see the group_8 file with some other numbers.
Kindly let me know how to proceed for that. oracle 11g database, standalone standby database in aix box
My guess is control file is still thinking that the group 8 file is present and looks for it when starting the standby, but actually that file is not there in the diskgroup. instead some other filename is there for the same group.
Either i want to update the control file about the new log group 8, or drop the log 8 group, delete the log 8 group files from the disgroups +DG_FLASH, +DG_DATA and create a new log 8 group
Kindly suggest
Regards,

Answer 1

Test
SQL> Select GROUP#, THREAD#, SEQUENCE#, BYTES from v$standby_log;
  GROUP# THREAD# SEQUENCE# BYTES
  4 1 0 52428800
  5 1 1327 52428800
  6 1 0 52428800
SQL> alter database recover managed standby database cancel;
Database altered.
SQL> ALTER DATABASE ADD STANDBY LOGFILE GROUP 7 '/u01/app/oracle/oradata//redo07.log' SIZE 50M;
Database altered.
SQL> alter database recover managed standby database disconnect from session;
Database altered.
SQL> Select GROUP#, THREAD#, SEQUENCE#, BYTES from v$standby_log;
  GROUP# THREAD# SEQUENCE# BYTES
  4 1 0 52428800
  5 1 1327 52428800
  6 1 0 52428800
  7 0 0 52428800 
ALTER DATABASE CLEAR LOGFILE GROUP 7; 
SQL> alter database recover managed standby database cancel;
Database altered.
SQL> ALTER DATABASE CLEAR LOGFILE GROUP 7;
Database altered.
SQL> alter database recover managed standby database disconnect from session;
Database altered.
SQL> Select GROUP#, THREAD#, SEQUENCE#, BYTES from v$standby_log;
  GROUP# THREAD# SEQUENCE# BYTES
  4 1 0 52428800
  5 1 1327 52428800
  6 1 0 52428800
  7 0 0 52428800
SQL> /
  GROUP# THREAD# SEQUENCE# BYTES
  4 1 1330 52428800
  5 1 0 52428800
  6 1 0 52428800
  7 0 0 52428800
What I noticed is no matter how many switches I do the Standby only uses group 4 and 5. If I recreate with a Thread number it seems to work.
SQL> alter database recover managed standby database cancel;
Database altered.
SQL> ALTER DATABASE DROP STANDBY LOGFILE GROUP 7;
Database altered.
SQL> !rm /u01/app/oracle/oradata//redo07.log
SQL> ALTER DATABASE ADD STANDBY LOGFILE THREAD 1 GROUP 7 '/u01/app/oracle/oradata//redo07.log' SIZE 50M;
Database altered.
SQL> alter database recover managed standby database disconnect from session;
Database altered.
SQL> Select GROUP#, THREAD#, SEQUENCE#, BYTES from v$standby_log;
  GROUP# THREAD# SEQUENCE# BYTES
  4 1 0 52428800
  5 1 1343 52428800
  6 1 0 52428800
  7 1 0 52428800
SQL>
Check
SQL> select GROUP#,BYTES/1024/1024/1024 , STATUS, FIRST_TIME,NEXT_TIME from v$standby_log;
  GROUP# BYTES/1024/1024/1024 STATUS FIRST_TIM NEXT_TIME
  4 .048828125 UNASSIGNED
  5 .048828125 ACTIVE 29-NOV-13
  6 .048828125 UNASSIGNED
  7 .048828125 UNASSIGNED
SQL>