Problem: The JDBC connection succeeds but the error log receives continuous errors.
Explanation: This can occur if the connection includes any incorrect property which could cause a connection failure (for example, non-existing database name, incorrect URL format (specific to different types of database servers), referencing the wrong JDBC driver, or the JDBC driver does not exist (if you have not downloaded the driver).
Solution: When you create the connection, ensure that all properties are correct, and that you have the required drivers.