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From "Kerridge, Jon" <>
Subject Warnings when using J11 and groovy3.0.0-alpha-3
Date Wed, 05 Sep 2018 09:27:29 GMT
I am using J11 latest Oracle build plus groovy 3.0.0-alpha-3.

The groovy test program is a simple print hello script

I am using Intellij with Gradle and the relevant parts of the build file are:

repositories {
    maven {
        url ""

dependencies {
    compile 'org.codehaus.groovy:groovy:3.0.0-alpha-3'
    compile group: 'javax.xml.bind', name: 'jaxb-api', version: '2.3.0'

The program works but I get a warning as follows:

"C:\Program Files\Java\jdk-11\bin\java.exe" "-Dtools.jar=C:\Program Files\Java\jdk-11\lib\tools.jar"
"-Dgroovy.starter.conf=C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2018.2.2\plugins\Groovy\lib\groovy-starter.conf"
"-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2018.2.2\lib\idea_rt.jar=58513:C:\Program
Files\JetBrains\IntelliJ IDEA Community Edition 2018.2.2\bin" -Dfile.encoding=UTF-8 -classpath
C:\Users\Jon\.gradle\caches\modules-2\files-2.1\org.codehaus.groovy\groovy\3.0.0-alpha-3\81b3f93dc6c8cdecdca450c6d5326abe9ea28971\groovy-3.0.0-alpha-3.jar --conf "C:\Program Files\JetBrains\IntelliJ IDEA Community
Edition 2018.2.2\plugins\Groovy\lib\groovy-starter.conf" --main groovy.ui.GroovyMain --classpath
--encoding=UTF-8 D:\IJTest\testj10g2.5.2\src\main\groovy\test1.groovy
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.codehaus.groovy.vmplugin.v7.Java7$1 (file:/C:/Users/Jon/.gradle/caches/modules-2/files-2.1/org.codehaus.groovy/groovy/3.0.0-alpha-3/81b3f93dc6c8cdecdca450c6d5326abe9ea28971/groovy-3.0.0-alpha-3.jar)
to constructor java.lang.invoke.MethodHandles$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
WARNING: All illegal access operations will be denied in a future release
hello from test

Process finished with exit code 0

Where hello from test is what I was expecting!

Is this currently expected behaviour or is something amiss?

Jon Kerridge

From: Paul King <>
Sent: 14 August 2018 12:21
Subject: Re: Java 11 Compatibility check: Apache-groovy

On Tue, Aug 14, 2018 at 9:10 PM Dragan, Krzysztof <<>>
We are reaching out to you to check Java 11 compatibility of the library Apache-groovy

Could you help us by answering the following questions:

Col 1






Library name

Latest version

Is the library compatible with Java 11 Compatible?

Is the library supported with Java 11?

(If ā€œNā€ in compatibility or support)
What is the versions that would be compatible and Supported?

Date of support availability?

Apache Groovy

Stable: 2.5.2, Preliminary: 3.0.0-alpha-3

For 2.5, Groovy classes compiled with JDK10 should run on JDK11. Groovy 3.0 builds and all
tests pass on JDK11 but further testing is required.

See previous answer.

See previous answer.

2.5.2 was released yesterday. Groovy 3.0.0 final doesn't have a set target date yet but isn't
due in the next few months.

Appreciate your response by 17.08.2018

Krzysztof Dragan
PTC Inc. Contractor

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