Custom @NotNull annotations stopped working between 2.8.5 and 2.8.6

[kevinm416]

Describe the bug

OpenAPI spec changes from 2.8.5 -> 2.8.6.

To Reproduce
Steps to reproduce the behavior:

• What version of spring-boot you are using? 3.4.5
• What modules and versions of springdoc-openapi are you using? 2.8.6
• What is the actual and the expected result using OpenAPI Description (yml or json)?

@Target({METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER, TYPE_USE})
@Retention(RUNTIME)
@Documented
public @interface NotNull {
  String message() default "must not be null";
  Class<?>[] groups() default {};
  Class<? extends Payload>[] payload() default {};
  String fieldOverride() default "";
}

public record Address(
    @NotNull String address1,
    Optional<String> address2) {}

In springdoc v2.8.5:

      "Address": {
        "properties": {
          "address1": {
            "type": "string"
          },
          "address2": {
            "type": "string"
          }
        },
        "required": [
          "address1"
        ],
        "type": "object"
      },

In springdoc 2.8.6:

      "Address": {
        "properties": {
          "address1": {
            "type": "string"
          },
          "address2": {
            "type": "string"
          }
        },
        "type": "object"
      },

• Provide with a sample code (HelloController) or Test that reproduces the problem

@RestController
@RequestMapping("/api/hello")
public class HelloController {

  @Target({ElementType.METHOD, ElementType.FIELD, ElementType.ANNOTATION_TYPE, ElementType.CONSTRUCTOR, ElementType.PARAMETER, ElementType.TYPE_USE})
  @Retention(RetentionPolicy.RUNTIME)
  @Documented
  public @interface NotNull {
    String message() default "must not be null";
    Class<?>[] groups() default {};
    Class<? extends Payload>[] payload() default {};
    String fieldOverride() default "";
  }

  public record Address(@NotNull String address1, Optional<String> address2) {}

  @GetMapping
  public Address getAddress() {
    return new Address("1", Optional.of("2"));
  }
}

Expected behavior

• A clear and concise description of what you expected to happen.
  I expect address1 to remain a required field.

• What is the expected result using OpenAPI Description (yml or json)?

      "Address": {
        "properties": {
          "address1": {
            "type": "string"
          },
          "address2": {
            "type": "string"
          }
        },
        "required": [
          "address1"
        ],
        "type": "object"
      },

[bnasslahsen]

This is related to the change of swagger-core from 2.2.28 to 2.2.29.
Nothing we can handle directly in springdoc-openapi.

Please feel free to report the issue to the swagger-core project instead.

[kevinm416]

@bnasslahsen And there are no extension points in springdoc I could use to work around this issue either?