@daniel_sahal,

I tried uninstalling the JDBC driver but this time I am getting the below classNotFound error.

java.lang.ClassNotFoundException: com.mysql.jdbc.Driver

 Also, I tried using the one (jdbc) from above link which you shared. I am getting the below error.

java.sql.SQLInvalidAuthorizationSpecException: Could not connect to address=(host=test-db-dev.cluster-ro-pkh5s13hvg.us-west-2.rds.amazonaws.com)
(port=3306)(type=master) : (conn=12345676) Access denied for user 'test_user'@'10.2255.1134.111' (using password: YES)