When I was migrating a maven project implemented with Spring to Spring Boot 1.5.20.RELEASE. I realized of this issue related with a final public method inside a non final class annotated with @Transactional, causing injected beans within class became ``null`.

In order to resolve the issue I could reproduce it in this small project. For more information visit stackoverflow

The project uses the following technologies:

• Spring Boot v1.5.20.RELEASE
• Spring Data JPA
• Hibernate
• H2 embedded database
• Lombock

In order to run the application you must have JDK 8 installed on your local machine. The solution has been tested on JDK 8 update 172.

During the start process the solution will execute two sql scripts to create the database shema (schema.sql) and import test data (data.sql)

When you have JDK 8 installed you need to perform the following steps:

1. Execute the following command on the command line ./mvnw clean install
2. The implemented unit test should fail for the update operation because of the bug.
3. Go to UserServiceImpl.java file and remove de final keyword in line 19.
4. Save changes and perform step 1, once again. The unit test should not fail during its execution