Spring Boot applications that are ran by the Maven plugin are forked by default. If you were customizing properties using -D, these are no longer passed to the Spring Boot application.

For example, if you were trying to run and debugging your spring boot application using the below command, the debugging will not work with Spring boot version , 

clean install spring-boot:run -Dspring-boot.run.arguments=--spring.profiles.active=test

You need to pass -Dspring-boot.run.fork=false along with the above command to make the debugging/break point work