illegal reflective access on SpringBoot 2.1.2

[xbaker]

WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access using Lookup on org.springframework.cglib.core.ReflectUtils (file:/home/user/.m2/repository/org/springframework/spring-core/5.1.4.RELEASE/spring-core-5.1.4.RELEASE.jar) to class java.lang.Object
WARNING: Please consider reporting this to the maintainers of org.springframework.cglib.core.ReflectUtils
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

Spring boot : 2.1.2
java : OpenJDK Runtime Environment AdoptOpenJDK (build 11.0.5+10)

[bclozel]

Closing as a duplicate of #22674, see this comment for more details.

[buckett]

You should read the linked comment @bclozel mentioned, #22674 (comment) . If you have a Spring Boot application and have enabled devtools using an optional dependency:

	<dependency>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-devtools</artifactId>
		<optional>true</optional>
	</dependency>

Then running the application while in development (mvn spring-boot:run or through the IDE) will cause this dependency to be on the classpath and you will see this warning, however when you build a JAR/WAR for production, this dependency is not pulled in and so you won't see this warning in production.