Error ORA-10458: Standby Database Requires Recovery?

Hello DBA Experts,

Can anyone help me to solve the following query faced me:

SQL> startup mount;
ORACLE instance started.
Total System Global Area 1140850688 bytes
Fixed Size 2923584 bytes
Variable Size 419431360 bytes
Database Buffers 704643072 bytes
Redo Buffers 13852672 bytes
Database mounted.
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-10458: standby database requires recovery
ORA-01152: file 1 was not restored from a sufficiently old backup
ORA-01110: data file 1:
\'/u01/app/oracle/oradata/DG11G_STBY/datafile/o1_mf_system_bjl6rb9q_.dbf\'

Thanks in Advance!

Cause of the Error:

This error typically occurs when the standby database is not in sync with the primary database. Specifically:

• The standby database requires additional redo logs to be applied to bring it up to date.
• The data files may not be consistent because they are from an incomplete or outdated backup.

Solution:

1) Verify the Standby Configuration:

• Ensure that the standby database is configured correctly as a physical standby database.

2) Check for Missing Redo Logs:

• Identify which redo logs are missing by querying the standby database.

SELECT THREAD#, SEQUENCE# 
     FROM V$ARCHIVED_LOG 
     WHERE APPLIED = 'NO' ORDER BY SEQUENCE#;

Apply the Missing Redo Logs:

• Use the following command to manually recover the standby database:

SELECT NAME, STATUS FROM V$DATAFILE;

• If prompted for an archive log, specify its location or ensure it is accessible.

Verify Data File Consistency:

• Check the status of the data files:

SELECT NAME, STATUS FROM V$DATAFILE;

If any data file shows RECOVER, ensure that all redo logs are applied.

Sync the Standby Database:

• Start redo log apply in real-time.

ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE DISCONNECT FROM SESSION;

Open the Standby Database:

• After recovery, attempt to open the database in read-only mode:

ALTER DATABASE OPEN READ ONLY;

Resolve Backup Issues (if applicable):

• If the error ORA-01152: file 1 was not restored from a sufficiently old backup persists, restore the required data files from a valid backup and apply the necessary logs.

Note:

• Ensure that the primary database is functioning correctly and generating redo logs.
• Regularly monitor the Data Guard environment using tools like DGMGRL or Oracle Enterprise Manager.
• Validate the backup strategy to avoid such issues in the future.

Conclusion:

The ORA-10458 error indicates a recovery issue in the standby database, which can typically be resolved by applying the necessary redo logs and ensuring data file consistency. Following the outlined steps should help resolve the problem and bring the standby database into sync with the primary.