REDO or ARCHIVE Logfile Numbers Out Of Sync ORA-312 ORA-314

(Doc ID 1108550.1)

Last updated on JULY 21, 2017

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.4 and later
Information in this document applies to any platform.


Symptoms

During the investigation of the ALERT.LOG due to some problem you notice error messages in the ALERT.LOG regarding: ORA-00314 ; ORA-00312

Errors in file /XX/opt/oracle/admin/mydb/bdump/mydb_arc2_9000.trc:
ORA-00314: log 4 of thread 1, expected sequence# 35836 doesn't match 35832
ORA-00312: online log 4 thread 1: '/XX/oradata/mydb/redolog4b.ora'

Not knowing if this was the source of the problem they contacted OSS

On further investigation it was found that this problem had been ongoing for several days
and did not impact the integrity of the database

Further research show that the database opened cleanly after a normal shutdown immediate and startup

You may find that these error messages are not related to the problem you were investigating.

Changes

Reviewing the ALERT.LOG

Cause

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