"Content type 'application/json;charset=UTF-8' not supported" in Spring Rest application

I was able to solve it by removing @JsonManagedReference.

In my case there was a Jackson fail, logged as a WARN:

Failed to evaluate Jackson deserialization for type [[simple type, class ***]]: com.fasterxml.jackson.databind.JsonMappingException: Conflicting setter definitions for property [...]

I had overloaded a setter by accident, so it could not be resolved by Jackson and spring has thrown 415.