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TNS-12519: TNS:no appropriate service handler found



TNS-12519: TNS:no appropriate service handler found..

Answer / guest

Cause: The listener could not find any available service
handlers that are appropriate for the client connection.

Action: Run "lsnrctl services" to ensure that the
instance(s) have registered with the listener, and are
accepting connections.

Please add more information about this Error

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