ORA-12514: TNS:listener does not currently know of service requested in connect descriptor

Cause : The listener received a request to establish a connection to a database or other service. The connect descriptor received by the listener specified a service name for a service (usually a database service) that either has not yet dynamically registered with the listener or has not been statically configured for the listener. This may be a temporary condition such as after the listener has started, but before the database instance has registered with the listener.

Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts

- Wait a moment and try to connect a second time. - Check which services are currently known by the listener by executing: lsnrctl services - Check that the SERVICE_NAME parameter in the connect descriptor of the net service name used specifies a service known by the listener. - If an easy connect naming connect identifier was used, check that the service name specified is a service known by the listener. - Check for an event in the listener.log file.

update : 21-08-2017
ORA-12514

ORA-12514 - TNS:listener does not currently know of service requested in connect descriptor
ORA-12514 - TNS:listener does not currently know of service requested in connect descriptor

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