Illegal reflective access by org.springframework.cglib.core.ReflectUtils$1

Question

My JDK 9+181 Spring Boot 2.0.0.BUILD-SNAPSHOT CLI application displays this warning on startup:

WARNING: An illegal reflective access operation has occurred
         


        

Answer 1

This also happened to me on JDK 11 and Spring Boot 2.2.1 (Spring Core 5.2.1).

What helped was removing the dependency to org.springframework.boot:spring-boot-devtools, as suggested in some comments to Spring Framework issue #22814.