MySQLNonTransientConnectionException: Could not create connection to database server

There are several reasons why you might be getting a MySQLNonTransientConnectionException when trying to connect to a database server:

1. Incorrect login credentials: One of the most common reasons for this error is incorrect login credentials. Make sure that you are using the correct username and password to connect to the database server.

2. Firewall or network issues: If your network or firewall is blocking the connection to the database server, you may get this error. Check with your network administrator to make sure that the necessary ports are open for MySQL connections.

3. Database server downtime: If the database server is down or undergoing maintenance, you won't be able to connect to it. Check with your database administrator to see if there are any issues with the server.

4. Insufficient permissions: Make sure that the user account you are using to connect to the database server has sufficient permissions to access the database.

5. Outdated drivers or software: If you are using outdated drivers or software to connect to the database server, you may get this error. Make sure that you are using the latest version of MySQL and the JDBC driver.

To resolve this issue, you can try the following:

1. Double-check your login credentials, making sure that you are using the correct username and password.

2. Check with your network administrator to ensure that the necessary ports are open for MySQL connections.

3. Contact your database administrator to see if there are any issues with the database server.

4. Ensure that the user account you are using has sufficient permissions to access the database.

5. Update to the latest version of MySQL and the JDBC driver.

If none of these solutions work, you may need to contact your IT department or a database administrator for further assistance.