Spring Boot : Error creating bean with name 'jpaMappingContext': java.lang.NullPointerException

Question

My combination of is Spring Boot + Spring Data Jpa + Multiple Databases. I am getting following NullPointer exception when starting the application. Feels like SPring Data with

Answer 1

Spring boot have AutoConfiguration classes enabled by default for the data sources allready on classpath. You should explicitly exclude AutoConfiguration class to disable.

Example :

@EnableAutoConfiguration(exclude = {JndiConnectionFactoryAutoConfiguration.class,DataSourceAutoConfiguration.class,
                                    HibernateJpaAutoConfiguration.class,JpaRepositoriesAutoConfiguration.class,DataSourceTransactionManagerAutoConfiguration.class})
@ComponentScan
public class MyBootApplication {
    public static void main(String[] args) {
        SpringApplication.run(MyBootApplication.class, args);
    }
}