Facing ambiguous map found exception while loading Spring web app

Question

java.lang.IllegalStateException: Ambiguous mapping found. Cannot map 'roleTaskListController' bean method
public com.hp.dsm.usermgmt.model.Role com.hp.dsm.usermgmt.web.RoleTaskListController.listTask(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse) throws java.lang.Exception
to {[/usermgmt/listTask],methods=[GET],params=[],headers=[],consumes=[],produces=[],custom=[]}: There is already 'roleTaskListController' bean method
protected java.util.Map com.hp.dsm.usermgmt.web.RoleTaskListController.referenceData(javax.servlet.http.HttpServletRequest) throws java.lang.Exception mapped.

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• The above is the log snippet.
• I do not have any duplicate mappings and the spring version I am using is Spring 3.2.1

Comments

Is it possible to put code sinppet here. U can edit the question and put more detail i.e. code.

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@Controller
@RequestMapping("usermgmt/listTask")
public class RoleTaskListController extends BaseFormController {

    private static final long serialVersionUID = 8638654067225936024L;
    @Autowired
    private RoleManager roleManager;

    public void setRoleManager(RoleManager roleManager) {
        this.roleManager = roleManager;
    }

    @Autowired
    private GroupManager groupManager;

    public void setGroupManager(GroupManager groupManager) {
        this.groupManager = groupManager;
    }

    public RoleTaskListController() {

    }

    @RequestMapping(method = RequestMethod.GET)
    @ModelAttribute
    public Role listTask(HttpServletRequest request,
            HttpServletResponse response) throws Exception {
    // list task
    }
       

    @ModelAttribute
    protected Role showForm(HttpServletRequest request,
            HttpServletResponse response) throws Exception {
            // show form
    }

    @SuppressWarnings("rawtypes")
    @RequestMapping(method = RequestMethod.GET)
    protected Map referenceData(HttpServletRequest request) throws Exception {
        // return map
    }

}

---

In your code you have two requestMethod.Get (i.e. listTask and referenceData) which is root cause of the issue.
Check if you can add something like @RequestMapping(value = "myEdit", method = RequestMethod.GET) in one function and  @RequestMapping(value = "myCopy", method = RequestMethod.GET)  in other.

Answer 1

Just making a guess of the common problem check if it helps:

If you have a controller as given below, all requests other than /book/edit will be directed to mydefault() while /book/edit will be sent to meet().

@Controller
@RequestMapping("/book")
public class BookController {

    @RequestMapping
    public @ResponseBody String mydefault() {
        return "Hi Book!";
    }

    @RequestMapping("/edit")
    public @ResponseBody String meet() {
        return "Nice to meet you Book!";
    }
}

It is a common problem where you have two methods without explicit path mapping.