Micronaut 4 is unable to validate classes from another module

[sergey-morenets]

Expected Behavior

Micronaut 4 should apply validation annotations even if class is in another module(jar).

Actual Behaviour

Hi

We tried to migrate Micronaut 3 project to Micronaut 4 however our tests started failing because validation stopped working.
After detailed investigation it turned out that Micronaut 4 doesn't apply validation annotation on the classes that come from another jar. For example:

@Getter
@Setter
public class Product {

    @NotEmpty
    @Size(
            min = 3,
            max = 16
    )
    private String name;

    private int id;
}

We can't put @introspected annotation there so we use another approach:

@Introspected(classes = Product.class)
public class BeanValidationConfiguration {
}

We debugged this behavior to the method in AnnotationMetadataSupport:

    @Internal
    static void registerRepeatableAnnotation(@NonNull String repeatable, @NonNull String repeatableContainer) {
        REPEATABLE_ANNOTATIONS_CONTAINERS.put(repeatable, repeatableContainer);
    }

It seems that REPEATABLE_ANNOTATIONS_CONTAINERS map contains only those annotations that are found inside current module.
So to workaround that we need to create dummy class and put there @notempty and @SiZe annotations.

Steps To Reproduce

No response

Environment Information

JDK 21

Example Application

No response

Version

4.1.4