Spring Boot 2.1 EntityManagerFactory Bean could not be found

Question

I have simple Spring Boot project with JPA, Web and PostgreSQL. I'm using the latest Spring Boot version 2.1.3.RELEASE .

After adding simple JpaRepository application fails on startup with the following error:

***************************
APPLICATION FAILED TO START
***************************

Description:

Field dataMappingRepository in com.my.example.service.impl.SimpleServiceImpl required a bean named 'entityManagerFactory' that could not be found.

The injection point has the following annotations:
    - @org.springframework.beans.factory.annotation.Autowired(required=true)


Action:

Consider defining a bean named 'entityManagerFactory' in your configuration.

I have a simple @Service class like:

public class SimpleServiceImpl implements SimpleService {
  @Autowired private SimpleJpaRepository repo;
}

And JpaRepository:

public interface SimpleJpaRepository extends JpaRepository<SimpleEntity, Long> {}

And here is my application.yml:

spring:
   datasource:
      url: jdbc:postgresql://localhost:5432/simple
      username: user
      password: pass
      driver-class-name: org.postgresql.Driver
   jpa:
      show-sql: false
      properties:
         hibernate:
            dialect: org.hibernate.dialect.PostgreSQLDialect
      hibernate:
         ddl-auto: validate

If I change spring-boot-starter-parent to 2.0.8.RELEASE the application starts correctly.

Answer 1

Ok, so finally the problem was as Andy Wilkinson said with cached Hibernate dependency.

After deleting org.hibernate folder from my M2 repo and updating maven project, it works correctly.

Answer 2

I'm using the latest Spring Boot version 2.1.2.RELEASE.
But mistakenly, in properties tag i forget to delete 4.3.5 version as you see below which cause confusion between library loaded.
<properties><hibernate.version>4.3.5.Final</hibernate.version></properties>
In .m2 repository of org.hibernate folder, i got both version library downloaded. Delete org.hibernate folder and update maven project. It will run.