ORA-01616: instance string (thread string) is open - cannot disable

ORA-01616: instance string (thread string) is open - cannot disable


Cause:


The thread is not closed. The last instance to use the thread died leaving the thread open. A thread cannot be disabled until it is closed. It is still required for crash or instance recovery.



Action:


If the database is open, instance recovery should close the thread soon - wait a few minutes. Otherwise open the database - crash recovery will close the thread.