ORA-01155: the database is being opened, closed, mounted or
dismounted



ORA-01155: the database is being opened, closed, mounted or dismounted..

Answer / guest

Cause: The requested operation needs the instance to be in a
particular state but the state is being changed.

Action: Wait for the open, close, mount, or dismount to
complete then retry the operation. If necessary, a SHUTDOWN
ABORT will always work.

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