Error receiving POST request in Spring with Jackson JSON conversion

I'm new to both Jackson and Spring, so please excuse me if this is a dumb question. I've been working on a simple spring project which handles JSON requests. I have GET and DELETE working, but I'm getting an error when I try to POST:

SEVERE: Servlet.service() for servlet [mvc-dispatcher] in context with path [/CynergyRestStarterKit] threw exception [Handler processing failed; ...with root cause
at org.springframework.http.converter.json.MappingJacksonHttpMessageConverter.getJavaType(

Here is my Java service:

@RequestMapping(value = "/todos", method = RequestMethod.GET)
public @ResponseBody
List<TodoItem> getTodos() {     
    return tasks;

@RequestMapping(value = "/todo/create", method = RequestMethod.POST)
public @ResponseBody
TodoItem createTodo(@RequestBody TodoItem item) {
    return null;

What am I doing wrong?


What version of Spring and Jackson are you using?

This seems to indicate a version issue.

I see that you are using 1.x of Jackson (codehaus vs fasterxml). I would upgrade both Spring and Jackson to the latest version.

I had the same problem using spring-webmvc 3.2.9, after several retires i found that my project needed the following libraries:

  • jackson-annotations-2.3.3
  • jackson-core-2.3.3
  • jackson-mapper-asl-1.9.13
  • jackson-core-asl-19.3

So adding these solved the problem

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