TNS-12528: TNS:listener: all appropriate instances are
blocking new connections
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Answer Posted / guest
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.
Please add more information about this Error
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