Unsupported Media Type (415) in POST request after upgrading to 3.2.3 about spring-boot

[bclozel]

Thanks for reaching out.
I think this is similar to spring-projects/spring-framework#31959 - the only difference between the two Spring Boot versions is the registration of the parameter name module in Spring Framework. This module was already registered in the Spring Boot JSON codec in 3.1.x

With 3.1.x, the first codec instance fails with Failed to evaluate Jackson deserialization for type [[simple type, class com.example.unsupported.LoginRequestBody]]: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot define Creator property "email" as @JsonUnwrapped: combination not yet supported and the second works because it does not have this module registered.

With 3.2.x, both codecs fail the same way.

I think there is a way to reproduce this problem without Spring being involved at all. You can choose to work on such setup to report this behavior difference, or only fix the invalid setup in your Email class which was broken in the first place.

I'm closing this issue here as Spring Boot has nothing to do with this and the module registration change in Spring Framework has already been documented.

Thanks!