An illegal reflective access operation has occurred

[chkpnt]

I'm getting the following warning when using remap with Java 11:

WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by net.sf.cglib.core.ReflectUtils$1 (file:/Users/ich/.gradle/caches/modules-2/files-2.1/cglib/cglib/3.2.9/a4b7af2ea0a5ecad2d283c2fff119009f0c60d20/cglib-3.2.9.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)
WARNING: Please consider reporting this to the maintainers of net.sf.cglib.core.ReflectUtils$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

What is the recommended way to suppress this warning?

[schuettec]

Hi, this occurs on Java version >= 9. If you created a module you can fix this by declaring your module as 'open module' in module-info. This way you allow reflective access in a Java >= 9 compatible way. Gregor Dschung <notifications@github.com> schrieb am Mi., 18. Nov. 2020, 11:50:

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I'm getting the following warning when using remap with Java 11: WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by net.sf.cglib.core.ReflectUtils$1 (file:/Users/ich/.gradle/caches/modules-2/files-2.1/cglib/cglib/3.2.9/a4b7af2ea0a5ecad2d283c2fff119009f0c60d20/cglib-3.2.9.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) WARNING: Please consider reporting this to the maintainers of net.sf.cglib.core.ReflectUtils$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 What is the recommended way to suppress this warning? — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#138>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ADNFVQQJ2G7NT4HTQK4HSSDSQORIFANCNFSM4TZZVGDQ> .

[chkpnt]

Thanks for the quick response, which gave me the correct hint (towards the module system). Credits also to @nipafx, whose blog post gave me further insights.

At the moment I do not want to migrate to the JPMS , so I'm now using the --add-opens argument for the JVM, i.e. the following for Gradle:

application {
    applicationDefaultJvmArgs = ["--add-opens", "java.base/java.lang=ALL-UNNAMED"]
}

[nipafx]

Glad to hear, the blog post helped, @chkpnt!

Huh, I didn't know Remondis had an IT branch - talk about garbage collection... 😂 Sorry for the silly pun, I couldn't resist.

[schuettec]

Haha yes, default joke for new employees ;)