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via Oracle Community by 974328, 2 years ago
Listener refused the connection with the following error: 203 ORA-12505, TNS:listener does not currently know of SID given in connect descriptor 204 205
via GitHub by alexey-maksimov
, 2 years ago
Listener refused the connection with the following error: ORA-12520, TNS:listener could not find available handler for requested type of server
via Stack Overflow by Dreamer
, 2 years ago
Listener refused the connection with the following error: ORA-12519, TNS:no appropriate service handler found
java.sql.SQLException: Listener refused the connection with the following error:ORA-12514, TNS:listener does not currently know of service requested in connect descriptor at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:443)