listener.ora
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = G:\oracle\product\10.2.0\db_1)
(PROGRAM = extproc)
)
(SID_DESC =
(GLOBAL_DBNAME = ORCL)
(ORACLE_HOME = G:\oracle\product\10.2.0\db_1)
(SID_NAME = ORCL)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = zyk)(PORT = 1521))
)
)

Error Id: ORA-12514

Title: TNS:listener does not currently know of service requested in connect descriptor

Description:

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

Action:

- Wait a moment and try to connect a second time. - Check which services are currently known by the listener by executing: lsnrctl services <listener name> - 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.

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.

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