What to do if you get a groovy warning in Thymeleaf Layout

Overview

Reflection-related warning whose specifications have changed from JDK9 Groovy seems to support from 3.0. Reference Since the beta version is out, if you temporarily replace the groovy jar of the target library, the warning will disappear.

environment

warning

WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.codehaus.groovy.vmplugin.v7.Java7$1 (file:.m2/repository/org/codehaus/groovy/groovy/2.5.6/groovy-2.5.6.jar) to constructor java.lang.invoke.MethodHandles$Lookup(java.lang.Class,int)
WARNING: Please consider reporting this to the maintainers of org.codehaus.groovy.vmplugin.v7.Java7$1
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

Countermeasures

Replace groovy in the target library

[pom.xml]


		<dependency>
		  <groupId>nz.net.ultraq.thymeleaf</groupId>
		  <artifactId>thymeleaf-layout-dialect</artifactId>
		  <exclusions>
		  	<exclusion>
		  		<groupId>org.codehaus.groovy</groupId>
		  	    <artifactId>groovy</artifactId>
		  	</exclusion>
		  </exclusions>
		</dependency>

		<!--Waiting for TODO official release-->
		<dependency>
		    <groupId>org.codehaus.groovy</groupId>
		    <artifactId>groovy</artifactId>
		    <version>3.0.0-beta-1</version>
		</dependency>

It's just a warning, so it seems like it's a good idea to simply not issue a warning. Introductory notes when developing Spring Boot 2.0 applications in Java 10

It's still a beta version, so let's wait for the official release to the production environment!

reference

https://issues.apache.org/jira/browse/GROOVY-8339 https://qiita.com/rubytomato@github/items/3d9f657196c1e941699a

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