In this post, you’ll learn more about the Oracle ErrorORA-01197: thread string only contains one log with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
ORA-01197: thread string only contains one log
Reason for the Error ORA-01197: thread string only contains one log
During CREATE CONTROLFILE all threads represented in the logs must be represented by at least two logs. A “last log” and a second log. The named thread does not contain two such logs.
How to fix the Error ORA-01197: thread string only contains one log ?
You can fix this error in Oracle by following the below steps
Either find more logs from the named thread. Or use the RESETLOGS option to CREATE CONTROLFILE.