ORA-38855: cannot mark instance string (redo thread string) as enabled
Cause: The standby switchover or failover operation failed because it needs to mark an instance (redo thread) as enabled. However, it had less than 2 online redo logs, which prevented it from being enabled.
Action: Add more logfiles to the specified instance and retry the command.
Cause: The standby switchover or failover operation failed because it needs to mark an instance (redo thread) as enabled. However, it had less than 2 online redo logs, which prevented it from being enabled.
Action: Add more logfiles to the specified instance and retry the command.
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