dataSource or dataSourceClassName or jdbcUrl is required

The error message "dataSource or dataSourceClassName or jdbcUrl is required" typically occurs when you are configuring a database connection in your application and you have not provided the necessary information.

To resolve this error, you need to provide one of the following:

1. dataSource: This is an instance of a data source object that provides the necessary information to establish a database connection. You can create a data source object and configure its properties such as URL, username, and password.

2. dataSourceClassName: This is the fully qualified class name of the data source implementation that you want to use. You need to specify the class name and its required properties.

3. jdbcUrl: This is the URL string that specifies the database connection details, such as the database type, host, port, and database name. You need to provide a valid JDBC URL that matches the database you are connecting to.

Make sure you have provided one of these options with the correct information in your application configuration