SpringBoot Mention @DependsOnDatabaseInitialization and when you may want to use it in the release notes

Dear Spring Boot team,

with the refactoring of the datasource initialization you introduced an incompatible change regarding the datasource DDL initialization. Earlier the DDL initialization was performed directly after the initilization of the datasource which we assume was achieved by the DataSourceInitializerPostProcessor. Now the datasource initialization is executed by the DataSourceScriptDatabaseInitializer which is an InitializingBean that runs at some (random?) point during initialization. This leads to the problem that you get a datasource during initialization that is not initialized with the DDL statements causing SQL errors.

Best regards, Marcel

Comment From: wilkinsona

If you use the DataSource via JdbcTemplate, JPA, jOOQ, etc, it's guaranteed that the DataSource will have been initialized before it's used. If you're working with the DataSource directly you can use @DependsOnDatabaseInitialization on a bean's class or @Bean method to indicate that the bean should be initialized after the datasource. This is described in the documentation but we should mention it in the release notes as well. We can use this issue to do that.

Comment From: wilkinsona

I've added a note about initialization ordering to the release notes.

Comment From: MarcelMerkle

Thank you!