Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured

Question

I am working on a Spring Boot Batch example with MongoDB and I have already started the mongod server.

When I launch my application, I

Answer 1

This link helped.

Spring Boot auto-configuration tries to configure beans automatically based on the dependencies added to the classpath. And because we have a JPA dependency (spring-data-starter-jpa) on our classpath, it tries to configure it.

The problem: Spring boot doesn't have the all the info needed to configure the JPA data source i.e. the JDBC connection properties. Solutions:

1. provide the JDBC connection properties (best)
2. postpone supplying connection properties by excluding some AutoConfig classes (temporary - should be removed eventually)

The above link excludes the DataSourceAutoConfiguration.class with

@SpringBootApplication(exclude={DataSourceAutoConfiguration.class})

But this didn't work for me. I instead, had to exclude 2 AutoConfig classes:

@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class, XADataSourceAutoConfiguration.class})