Failed to request gap sequence. Thread #: 1, gap sequence: 6859-6859

Question

Dear all,
1.while applying the log manually 6859 it tells that is already registered. then i appplied 6860,6861,6862,6863 its get appplied.
2.But while check on the alertlog it tells
Failed to request gap sequence. Thread #: 1, gap sequence: 6859-6859,All FAL server has been attempted.
Thu May 17 13:04:59 2012
idle dispatcher 'D000' terminated, pid = (11, 18)"
3.the alert logfile from standby is given below
Completed: ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DI
Thu May 17 13:04:20 2012
Failed to request gap sequence. Thread #: 1, gap sequence: 6859-6859
All FAL server has been attempted.
Thu May 17 13:04:59 2012
idle dispatcher 'D000' terminated, pid = (11, 18)
thanks in advance,
regards,
DB

Answer 1

Hello again;
12154 is a common error. If this was Oracle 11 i would say check your Standby password file, I assume this is OK.
If not you must copy the password to the standby and rename it. After that you must cancel recovery and shutdown the standby
and START MOUNT on the new password file.
Can you tnsping both servers from the other?
Can you connect from ( sqlplus ) from each server to the other?
Example :
sqlplus sys/password@primary as sysdba (from the standby system)
Most likely your tnsname is missing an entry or has an incorrect entry. Sometimes this is a listener issue, double check your status.
Is your listener setup correctly?
If you do a :
lsnrctl status
The READY status comes from the instance registering with the listener.
The UNKNOWN status comes from the sid list entry in listener.ora.
from standby
$lsnrctl services
And make sure your service is available.
You can compare you tnsnames and listener.ora setup with my short notes :
http://www.visi.com/~mseberg/data_guard_on_oracle_11_step_by_step.html
Best Regards
mseberg