CacheConfig在本地系统中工作，但是在服务器上部署时不工作

Question

我正在尝试敲一个api，并在应用程序启动时将数据加载到缓存中。 代码在本地运行，我可以看到缓存在那里，但是当部署在服务器上时，我看到日志可以打印出来进行缓存，但是它没有提供数据。

@Service
@CacheConfig(cacheNames = { "sampleData" })
public class TestService
{
    private static final String API = "LInk to some API the data of which need to be cached."

    private static final RestTemplate restTemplate = restTemplate();
    @Getter
    public static Map<String, String> testCountry = new TreeMap<>(String.CASE_INSENSITIVE_ORDER);

    @Autowired
    TestService()
    {
    }

    @PostConstruct
    private static void getCountryData()
    {
        testCountry = TestService.code();
        log.info("Caching completed.");
    }

    public static Map<String, String> code()
    {
        log.info("Caching  is invoked {} ", API);
        Map<String, String> map = new TreeMap<>();

        try
        {
            ResponseEntity<SampleCountry[]> responseEntity = restTemplate
                    .getForEntity(API
                            , SampleCountry[].class);
            List<SampleCountry> SampleCountryList = Arrays.asList(responseEntity.getBody());
            map = SampleCountryList.stream()
                    .collect(Collectors.toMap(SampleCountry::getCode, SampleCountry::getName));

        }

        catch (HttpClientErrorException | HttpServerErrorException httpClientOrServerExc)
        {
            log.error("Error {} ",
                    httpClientOrServerExc.getStatusCode());
        }



        return map;
    }

    @Bean
    public static RestTemplate restTemplate()
    {
        RestTemplate restTemp = new RestTemplate();
        ((SimpleClientHttpRequestFactory) restTemp.getRequestFactory()).setConnectTimeout(CONNECTION_TIMEOUT);
        ((SimpleClientHttpRequestFactory) restTemp.getRequestFactory()).setReadTimeout(CONNECTION_TIMEOUT);

        return restTemp;
    }
}

我正在从另一堂课上调用它。

String countryName = Optional.ofNullable(TestService.testCountry).map(m -> m.get(code))
            .orElse(code);

countryName正在从缓存中提取数据。