Body parameters cannot be used with form parameters - Feign client with Headers and json data

Wow this a tricky one. The order of parameters matter here.

@RequestLine("POST /enroll")
@Headers({ "header1: {header1}", "header2: {header2}", "Content-Type: application/json" })
ResponseDto enroll(RequestDto requestDto, @Param("header1") String header1,@Param("header1") String header1)throws MyCustomException;

This works!!!

Thanks to my senior developer. He found it.

Order of parameters in feign should not matter as stated by spencergibb in this issue : https://github.com/spring-cloud/spring-cloud-netflix/issues/1915. If you don't use form parameters alongside body parameters you should search why one of your parameters is interpreted as a form parameter.

My specific problem, using spring @RequestMapping annotation was that feign was misinterpreting one of my param anotations because of a typo, in my case I provided a request path value /path/{pathParam} and mistype spring annotation with @PathVariable("pathparam") with lower case typo.