SpringBoot RestApi call 404 Not Found error - spring-boot

Question

I have a SpringBoot application that I am able to start ( http://localhost:80 ).
In my application.yml :
application:
baseurl: /respViewer/api
In my application I defined a #RestController and an endpoint :
#RestController
#RequestMapping("${application.baseurl}/viewer")
....
#PostMapping(value = "/getRespList", consumes = MediaType.APPLICATION_JSON_VALUE,
produces = MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity<Object> getResponsibilities(#RequestBody RequestDetail requestDetail)
When I try to access my application using Insomnia or through the Browser I am getting 404 Error.
http://localhost:8080/respViewer/api/viewer/getRespList
{
"timestamp": "2022-04-25T19:52:32.426+00:00",
"status": 404,
"error": "Not Found",
"message": "",
"path": "/respViewer/api/viewer/getRespList"
}
I also checked console output and found these messages :
POST "/respViewer/api/viewer/getRespList", parameters={}
2022-04-25 15:52:32.253 DEBUG 3744 --- [nio-8080-exec-1] o.s.w.s.h.SimpleUrlHandlerMapping : Mapped to ResourceHttpRequestHandler ["classpath:/META-INF/resources/", "classpath:/resources/", "classpath:/static/", "classpath:/public/", "/"]
2022-04-25 15:52:32.382 DEBUG 3744 --- [nio-8080-exec-1] o.s.w.s.r.ResourceHttpRequestHandler : Resource not found
2022-04-25 15:52:32.387 DEBUG 3744 --- [nio-8080-exec-1] o.s.w.s.DispatcherServlet : Completed 404 NOT_FOUND
What am I doing wrong?
Update 1 :
I added packages location where I have a REST Controller to application.yml :
spring:
component:
scan:
packages: com.example.demoRespManager
and now I am not getting 404 Error, however it doesn't look like I am getting into the body of implementation method. I setup a break-point in the first line of the method but never stop there. An output in the Console is :
2022-04-25 21:25:43.749 INFO 27996 --- [nio-8080-exec-1] o.s.w.s.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
2022-04-25 21:25:43.750 DEBUG 27996 --- [nio-8080-exec-1] o.s.w.s.DispatcherServlet : Detected StandardServletMultipartResolver
2022-04-25 21:25:43.915 DEBUG 27996 --- [nio-8080-exec-1] o.s.w.s.DispatcherServlet : enableLoggingRequestDetails='false': request parameters and headers will be masked to prevent unsafe logging of potentially sensitive data
2022-04-25 21:25:43.915 INFO 27996 --- [nio-8080-exec-1] o.s.w.s.DispatcherServlet : Completed initialization in 166 ms
2022-04-25 21:25:44.134 DEBUG 27996 --- [nio-8080-exec-1] o.s.w.s.DispatcherServlet : POST "/respViewer/api/viewer/getRespList", parameters={}
2022-04-25 21:25:44.180 DEBUG 27996 --- [nio-8080-exec-1] .m.m.a.ExceptionHandlerExceptionResolver : Using #ExceptionHandler com.<my_package_path>.exception.ApplicationExceptionHandler#handleException(Exception, WebRequest)
2022-04-25 21:25:44.254 DEBUG 27996 --- [nio-8080-exec-1] o.s.w.s.m.m.a.HttpEntityMethodProcessor : No match for [application/json], supported: []
2022-04-25 21:25:44.261 DEBUG 27996 --- [nio-8080-exec-1] .m.m.a.ExceptionHandlerExceptionResolver : Resolved [org.springframework.web.HttpMediaTypeNotSupportedException: Content type '' not supported]
2022-04-25 21:25:44.262 DEBUG 27996 --- [nio-8080-exec-1] o.s.w.s.DispatcherServlet : Completed 415 UNSUPPORTED_MEDIA_TYPE
UPDATE 2 :
In the Header section of the INSOMNIA application I added Content-type = application/json, since I defined it in my endpoint, and after that it started to work. I was able to start an application in the DEBUG mode and when I made a POST request in INSOMNIA I stopped at the first line of my method implementation.

Answer 1

I solved this issue :
updated my properties file with the list of the packages that contain the beans, it's an equivalent of #ComponentScan in Application ( spring.component.scan.packages )
Added Content-type = application/json to the Header in the Insomnia.