Only one thing that can be sure in ORA-12514 is that the target listener is up and running. Here I divide scenarios that could throw ORA-12514 into several error patterns as below: As a result, it responds ORA-12514 to alert the failed connection.Īs a DBA, I have seen several kinds of ORA-12514 in different scenarios and solved them by different means. ORA-12514 means that the listener cannot find any matched service with yours, so it cannot establish the connection with the database for you.
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