public ModelAndView Details(@ModelAttribute(\"\") @Validated App app, BindingResult result, @RequestParam(value=\"paramSessionAttr\", required=false) String session
I used sts to generate the spring project. I was getting the above error. After spending 2 days, I figured adjusting the version fix the problem.
In the parent section of pom.xml, I replaced 1.5.4 with 1.2.5
org.springframework.boot spring-boot-starter-parent 1.2.5.RELEASE