Java springboot POST request giving 404 - spring-boot

Question

I am trying a POST request in POSTMAN but even though its reaching the tomcat server node, I get following error in my localhost_access.log file
"POST /app/MyService/myControllerMethod HTTP/1.1" 404 1010
My Controller class is something like this :
#Controller("myServicecontroller")
#RequestMapping({"/MyService"})
public class MyServiceController {
#RequestMapping(value = {"myControllerMethod"}, method = {RequestMethod.POST})
public String myControllerMethodBackgroundCallBack(HttpServletRequest httpReq,
#RequestBody String request) {
// rest piece of code
}
}
Now my postman curl I am trying with empty data (tried with some value also) but get above 404 error response
curl --location --request POST 'http://my-ip-address:8080/app/MyService/myControllerMethod' \
--header 'Accept: application/json' \
--header 'Content-Type: application/json' \
--header 'My-Header-One: lskdnansdlknalkasndl' \
--header 'My-Header-Two: sadasdsa' \
--data-raw '{}'
What am I doing wrong? (app in above url is my service which works fine in other requests)
Same thing when I try with following code it is able to hit the api 200
HttpClient httpClient = new HttpClient();
PostMethod postMethod = new PostMethod(url);
postMethod.setRequestBody(requestString);
httpClient.setConnectionTimeout(httpReadTimeOut);
httpClient.executeMethod(postMethod);

Answer 1

I have successfully replicated this issue and found the root cause.
Root Cause
#ResponseBody annotation is missing in myControllerMethodBackgroundCallBack method.
Fix
#RequestMapping(value = {"myControllerMethod"}, method = {RequestMethod.POST})
#ResponseBody
public String myControllerMethodBackgroundCallBack(HttpServletRequest httpReq,
#RequestBody String request) {
// rest piece of code
}
}
Why?
#ResponseBody annotation is required with #Controller annotation and if use #RestController annotation then #ResponseBody annotation is not required.
In Short-
#RestController = #Controller + #ResponseBody
You can read more about #Controller and #RestController here https://medium.com/#akshaypawar911/java-spring-framework-controller-vs-restcontroller-3ef2eb360917