Solved
Unable to set header parameter to optional
I'm using Java 11.0.2, Spring Boot 2.2.6 and Spring OpenApi Core 1.1.49 to create an OpenApi documentation using annotations. The issue: During the request for creating a client in the Controller...
Found the solution - the problem wasn't in OpenApi annotation @Parameter, but in Spring binding annotation @RequestHeader, which binds the header field to the method parameter. @RequestHeader has also field "required" and by default, it's set on "true" and it overrides the one in @Parameter. So the solution was the following syntax - @RequestHeader(name = "X-Request-Correlation-Id", required = false).
