java.lang.NoClassDefFoundError: org/springframework/core/env/ConfigurableEnvironment

Question

I am trying to write a simple RESTful service using Spring Boot. However, there is an error message I am not able to solve. I have been researching and it looks like it is a

Answer 1

I had same problem with Spring boot 2.1.9.RELEASE

    
        org.springframework.boot
        spring-boot-starter-parent
        2.1.9.RELEASE
         
    

Added pom dependency eliminated this exception:

    
        org.springframework
        spring-core
        5.2.0.RELEASE
    

EDIT - better approach.

Also clean up of maven repository with spring dependencies resolved problem for me, there were not need to add spring-core 5.2.0.RELEASE in pom. Seems that when I had many versions of spring in repo some problem occurs. Also before again resolve dependencies dont forget clean project.

rm -rf ~/.m2/repository/org/springframework/