C3p0 too many connections

olá, pessoal alguém pode ajudar com esse erro? rodo a aplicação e fica carregando, de cara ja apresenta o seguinte erro,

12-Dec-2017 21:14:39.436 WARNING [http-nio-8084-exec-1] com.mchange.v2.resourcepool.BasicResourcePool. Bad pool size config, start 3 < min 10. Using 10 as start.

demora muito e em seguida apresenta o seguinte

A C3P0Registry mbean is already registered. This probably means that an application using c3p0 was undeployed, but not all PooledDataSources were closed prior to undeployment. This may lead to resource leaks over time. Please take care to close all PooledDataSources.

Segue abaixo a minha connection pool

public class ConnectionPool {
private static final String DB_USERNAME = "********";
private static final String DB_PASSWORD = "********";
private static final String DB_URL = "jdbc:mysql://********sa-east-1.rds.amazonaws.com:3306/nadalspringmvc?autoReconnect=true&useSSL=false";
private static final String DB_DRIVER_CLASS = "com.mysql.jdbc.Driver";

private static ComboPooledDataSource dataSource;

static {
    try {
        dataSource = new ComboPooledDataSource();
        dataSource.setDriverClass(DB_DRIVER_CLASS);

        dataSource.setJdbcUrl(DB_URL);
        dataSource.setUser(DB_USERNAME);
        dataSource.setPassword(DB_PASSWORD);

        dataSource.setMinPoolSize(10); //Minimo de conexões paradas(standby)   
        dataSource.setMaxPoolSize(100);
        dataSource.setAcquireIncrement(5);
        //dataSource.setCheckoutTimeout(100);
        dataSource.setMaxIdleTimeExcessConnections(600);
        dataSource.setUnreturnedConnectionTimeout(1800);
        dataSource.setUnreturnedConnectionTimeout(1800);
        dataSource.setAcquireRetryAttempts(30);
        dataSource.setMaxIdleTime(60);

    } catch (PropertyVetoException e) {
        e.printStackTrace();
    }
}

public static DataSource getDataSource() {
    return dataSource;
}}