Access to DialectResolutionInfo cannot be null when hibernate.dialect not set

spring.jpa.database=mysql

add spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQLDialect

@Configuration        
public class HibernateConfig {

    @Bean
    public HibernateJpaSessionFactoryBean sessionFactory(EntityManagerFactory emf) {
         HibernateJpaSessionFactoryBean factory = new HibernateJpaSessionFactoryBean();
         factory.setEntityManagerFactory(emf);
         return factory;
    }
}