Illegal reflective access operation has occurred

[MarcusTXK]

Please include the steps to reproduce the bug.

1. Run any tests from ConfigSystemTest
2. A warning will appears: WARNING: Illegal reflective access by com.google.gson.internal.reflect.ReflectionHelper.

What was expected to happen?

Illegal reflective access should not occur.

What actually happened? Please include a screenshot of the output.

[MarcusTXK]

Preliminary investigation shows that the problem can likely be solved if we locate the offending class (likely a java.* class) and avoiding serializing java.* classes without writing an explicit type-adapter. More on potential solutions on this issue here.

I am still trying to detect the exact source (other than that it comes from java.util.Collections), but have not found it yet. If anyone has any idea of the source, please do add it to the issue. My current suspicion is with SystemTestUtil.

[yhtMinceraft1010X]

Just to check, are you using Java 8?

Sometimes I encounter this, only to realise that I'm on Java 11. That being said though, we claim to support Java 11 in our DG.

[MarcusTXK]

Im currently using Java 11, but with a language level of 8 (in Intellij IDEA). That said, Im not exactly sure how much the language level affects the compiler, or if it just impacts the intellisense provided by the IDE. It might be just a Java 9 and above bug.

[sikai00]

I am using Azul Java 11.0.16 on M2 Macbook Air, and I actually encounter this error in almost all if not all my runs of RepoSense. It does not seem to affect the runs however in my case.

[MarcusTXK]

To clarify, this does not affect my runs either, but it might be good to resolve as All illegal access operations will be denied in a future release. This affects future java releases, such as in Java 17 onwards where reflective access is no longer permitted. This can be read more about here in oracle's blog post detailing Java 17's changes and going into detail about this error message.

[ckcherry23]

Referenced in discussion #1997