ORA-01620: no public threads are available for mounting
Answer Posted / guest
Cause: The INIT.ORA parameter "thread" is zero, its default
value. There are no threads which have been publicly
enabled, and not mounted.
Action: Shutdown the instance, change the INIT.ORA parameter
to a thread which is privately enabled and not mounted. If
the database is open in another instance, then a thread may
be publicly enabled.
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