Illegal reflective access (ArrayList.size) – Fixed in any Groovy 3.x/4.x version?

Hello Groovy Team,

We are using Groovy 3.0.12 with JDK 11 and see the following warning
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.codehaus.groovy.vmplugin.v9.Java9
(file: .../groovy-3.0.12.jar) to field java.util.ArrayList.size
WARNING: Please consider reporting this to the maintainers of org.codehaus.groovy.vmplugin.v9.Java9
WARNING: All illegal access operations will be denied in a future release

We also tested with Groovy 4.x and observed similar behavior.

Environment details:

Groovy: 3.0.12 (also tested 4.x)
Java: 11.0.29
Maven: 3.5.2

Could you please let us know:


  1.
Has this been fixed in any newer Groovy 3.x or 4.x version?
  2.
If yes, which version should we upgrade to?
  3.
Is there any recommended approach to avoid this without using --add-opens JVM options?

Thank you for your help.

Best regards,
Anjan

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