InaccessibleObjectException with OpenAPI 3 and Java 16 - spring-boot

Question

I am trying to implement a new project with OpenAPI 3 and Java 16. Every time I am trying to build I am seeing errors due to internal dependencies.
This is the error I am seeing every time I try to build.
[JAVA] java.lang.reflect.InaccessibleObjectException: Unable to make public boolean java.util.Collections$EmptyMap.isEmpty() accessible
I just want to know if people have used OpenAPI 3 with Java 16 and if did what dependencies they have used.

Answer 1

I was curious and just created a Java 16 Spring Boot 2.5.2 application with spring-boot-starter-web via https://start.spring.io. Then I added a #RestController and this springdoc dependency:
<dependency>
<groupId>org.springdoc</groupId>
<artifactId>springdoc-openapi-webmvc-core</artifactId>
<version>1.5.9</version>
</dependency>
At least that worked.
{
"openapi": "3.0.1",
"info": {
"title": "OpenAPI definition",
"version": "v0"
},
"servers": [
{
"url": "http://localhost:8080",
"description": "Generated server url"
}
],
"paths": {
"/hello": {
"get": {
"tags": [
"my-controller"
],
"operationId": "hello",
"responses": {
"200": {
"description": "OK",
"content": {
"application/json": {
"schema": {
"type": "object",
"additionalProperties": {
"type": "string"
}
}
}
}
}
}
}
}
},
"components": {}
}