获取resttemplate请求期间的httpclienterror

Question

I keep getting the below exception when I try to do a GET request. A direct curl request to the url works fine but this doesn't. I'm trying to call service on port 8085 from the service on port 8082 .

Code

ResponseEntity<List<String>> quoteResponse = restTemplate.exchange("http://localhost:8085/rest/test/{username}", HttpMethod.GET,
        null, new ParameterizedTypeReference<List<String>>() {
        },userName);

Curl

curl 'http://localhost:8082/rest/test/user1' -H "Content-Type: application/json"

Error

org.springframework.web.client.HttpClientErrorException$NotFound: 404 : [<Map><timestamp>2020-06-18T23:35:31.449+00:00</timestamp><status>404</status><error>Not Found</error><message></message><path>/rest/test/user1</path></Map>]
    at org.springframework.web.client.HttpClientErrorException.create(HttpClientErrorException.java:113) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:184) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:125) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.web.client.ResponseErrorHandler.handleError(ResponseErrorHandler.java:63) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]

Answer 1

where is your request header "Content-Type: application/json"

HttpHeaders httpHeaders = new HttpHeaders();
httpHeaders.setContentType(MediaType.APPLICATION_JSON);
HttpEntity<JSONObject> req = new HttpEntity<>(new HashMap(), httpHeaders);
ResponseEntity<List<String>> quoteResponse = restTemplate.exchange("http://localhost:8085/rest/test/{username}", HttpMethod.GET,
        req, new ParameterizedTypeReference<List<String>>() {
        },userName);

Answer 2

The issue seems to be with the ports 8081 worked fine. So there seems to be some connectivity issue between 8082 and 8085 . Very Strange for me.