RestClientException : No HttpMessageConverter - spring

Question

This appears to be a common error, but there also appears to be various solutions.
I have tried a number of them without any luck. The Jackson dependency was added, the MappingJackson2HttpMessageConverter object was used. Verified the MediaType.APPLICATION_JSON is being set.
Converting the POJO to a json string first and changing the Controller to accept a String instead of the specific object it works.
The following is a code snippet showing the controller which accepts a POJO and it generates the exception. There were some slight changes and hopefully no syntax errors.
The Controller
#RestController
#RequestMapping(path = "/main")
public class TestController
{
#GetMapping(path="/firstTest", consumes = {MediaType.APPLICATION_JSON_VALUE}, produces = "application/json")
public String login(#RequestBody MyObject1 obj1)
{
System.out.println("============Inside routine=============");
return "Returning....";
}
}
The Cosumer
private static void runTest()
{
MyObject1 obj1 = new MyObject(101, "Test");
HttpHeaders headers = new HttpHeaders();
headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON));
headers.setContentType(MediaType.APPLICATION_JSON);
headers.set("key", "value");
HttpEntity<MyObject1 > packetEntity = new HttpEntity<>(obj1,headers);
ResponseEntity<String>result = restTemplate.exchange("http://localhost:8080/main/FirstTest", HttpMethod.GET, packetEntity, String.class);
System.out.println(result);
}
The Exception
Exception in thread "main" org.springframework.web.client.RestClientException: No HttpMessageConverter for com.demo.MyObject1 and content type "application/json"
at org.springframework.web.client.RestTemplate$HttpEntityRequestCallback.doWithRequest(RestTemplate.java:964)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:740)
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:677)
at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:586)
at com.demo.clientSide.SimplestGetExample.attemptLogin(Test.java:106)
at com.demo.clientSide.SimplestGetExample.main(Test.java:56)
POJO
import lombok.Data;
import lombok.Getter;
import lombok.Setter;
public class MyObject1
{
#Setter #Getter int x;
#Setter #Getter String y;
public MyObject1() {}
public MyObject1(int x, String y)
{
this.x = x;
this.y = y;
}
}
Is there anything obvious that was missed with this example?
Since not completely certain the #RequestBody is required within the Controller.
Should I be able to pass in a POJO and have Spring do the conversion to json behind the scenes or it is expected that I explicitly do the conversion to json?
Updated Info
If the following line is commented out a slightly different Exception is received.
headers.setContentType(MediaType.APPLICATION_JSON);
One thread mentioned since this is a GET routine the ContentType shouldn't be set. The exception is basically the same but without the last part of the string "....and content type "application/json"