How to fix the Oracle error ORA-38853: cannot mark instance string (redo thread string) as disabled?

In this post, you’ll learn more about the Oracle ErrorORA-38853: cannot mark instance string (redo thread string) as disabled with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-38853: cannot mark instance string (redo thread string) as disabled

Reason for the Error ORA-38853: cannot mark instance string (redo thread string) as disabled

The standby switchover or failover operation failed because it needs to mark an instance (redo thread) as disabled. That instance was up, which prevented it from being disabled.

How to fix the Error ORA-38853: cannot mark instance string (redo thread string) as disabled ?

You can fix this error in Oracle by following the below steps

Shut down the specified instance and retry this command.