ORA-12528: TNS:listener: all appropriate instances are
blocking new connections

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ORA-12528: TNS:listener: all appropriate instances are blocking new connections..

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ORA-12528: TNS:listener: all appropriate instances are blocking new connections..

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Cause: All instances supporting the service requested by the
client reported that they were blocking the new connections.
This condition may be temporary, such as at instance startup.

Action: Attempt the connection again. If error persists,
then contact the administrator to check the status of the
instances.

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