Как избежать утечки памяти JVM в приложении при общении с более чем одним сервером? с CloseableHttpClients и непрерывным CloseableHttpRequests

Question

Мое приложение выполняет вызовы API для двух разных серверов для получения данных. Итак, я заменил Http Classes на CloseableHttp Classes. Пожалуйста, посоветуйте лучшую практику, чтобы избежать проблемы утечки памяти JVM.

    @Service
    @Transactional(rollbackFor={Exception.class},
     propagation=Propagation.REQUIRED)
      public class LoanService {
        static Logger log = (Logger) 
                LoggerFactory.getLogger(LoanService.class);


            // First API Call request starts here 
   public String getLanguagePreferenceFromFirstAPI(BigInteger loanNumber) throws Exception {
    CloseableHttpResponse response = null;
    try {       
        log.info("First API Call with Get Request starts here with LoanID :"+loanNumber );
        response = getApiResponse(LSASConstants.FIRST_API, loanNumber, LSASConstants.HTTP_GET_METHOD);

        if(response.getStatusLine() !=null && response.getStatusLine().getStatusCode() ==200){
            log.info("Received LanguagePreferenceJSON Response from CustMart API  ");
            String responseString = EntityUtils.toString(response.getEntity(), "UTF-8");
            return responseString;
        }else{
            String errorMsg = "ERRMSG: FirsttAPI Failed : HTTP error code : ";
            if (response.getStatusLine()!=null) errorMsg +=response.getStatusLine();
            log.error(errorMsg);
            throw new LSASException(errorMsg);
        }
    } catch (LSASException ex) {
        throw ex;
    }
    catch (Exception ex) {
        ex.printStackTrace();
        throw new LSASException(ex.getMessage());
    }finally{
        response.close();
    }
}


      // Second API Call request starts here
      public LoanServicesResponse getLoanFromLoanServices(BigInteger loanNumber) throws LSASException, IOException {
    CloseableHttpResponse response = null;
    try{
        response = getApiResponse(LSASConstants.SECOND_API, loanNumber, LSASConstants.HTTP_GET_METHOD);

        if(response.getStatusLine() !=null && response.getStatusLine().getStatusCode() ==200){
            log.info("Received LoanServicesResponse (Loan Summary) from "+LSASConstants.SECOND_API);
            String responseJson = EntityUtils.toString(response.getEntity());
            LoanServicesResponse loanServicesResponse = new Gson().fromJson(responseJson, LoanServicesResponse.class);
            return loanServicesResponse;

        }else{
            String errorMsg = "ERRMSG: Second API API Failed : HTTP error code : ";
            if (response.getStatusLine()!=null) errorMsg +=response.getStatusLine();
            throw new LSASException(errorMsg);
        }
    } catch (LSASException ex) {
        throw ex;
    }
    catch (Exception ex) {
        ex.printStackTrace();
        throw new LSASException(ex.getMessage());
    }finally{
        response.close();
    }
}



    // Actual API Call goes here

    private CloseableHttpResponse getApiResponse(String apiName, BigInteger loanNumber, byte methodType) throws LSASException, ClientProtocolException, IOException, URISyntaxException {
    String url="";
    CloseableHttpResponse response = null;
    URIBuilder uriBuilder=null;
        if(apiName.equalsIgnoreCase(LSASConstants.FIRST_API)) {
            String firstURL = LSASProperties.getProperty("firstService.url");
            if(firstURL !=null && !firstURL .isEmpty())
                url = String.format(LSASProperties.getProperty("firstService.url"), loanNumber.toString());
            else{
                log.error("ERRMSG : " + apiName + "API Failed : URL missing from properties file.");
                throw new LSASException("ERRMSG: " + apiName + "API Failed : URL missing from properties file.");
            }
        }
        else if(apiName.equalsIgnoreCase(LSASConstants.SECOND_API)) {
            String secURL=LSASProperties.getProperty("sec.url");
            if(secURL!=null && !secURL.isEmpty()){  
                uriBuilder = new URIBuilder(sec.URL);
                uriBuilder.setParameter("id", String.valueOf(loanNumber));
                url = uriBuilder.build().toString();
            }
            else{
                log.error("ERRMSG : " + apiName + "API Failed : URL missing from properties file.");
                throw new LSASException("ERRMSG: " + apiName + "API Failed : URL missing from properties file.");
            }
        }

        String userName=LSASProperties.getProperty("principal");
        String password=LSASProperties.getProperty("credentials");

        CredentialsProvider credsProvider = new BasicCredentialsProvider();
        credsProvider.setCredentials(AuthScope.ANY,
                new NTCredentials(userName, password, null, null));
        CloseableHttpClient client = HttpClientBuilder.create().setDefaultCredentialsProvider(credsProvider).build();

        if(methodType==LSASConstants.HTTP_GET_METHOD) {
            HttpGet httpGetRequest = new HttpGet(url);
            httpGetRequest.setHeader("Content-type", "application/json; charset=utf-8");
            response = client.execute(httpGetRequest);
        }
        else if(methodType==LSASConstants.HTTP_POST_METHOD) {
            HttpPost httpPostRequest = new HttpPost(url);
            httpPostRequest.setHeader("Content-type", "application/json; charset=utf-8");
            response = client.execute(httpPostRequest);
        }
        return response;
}

}

Мне нужны решения по нижеприведенным вопросам. 1. Как предотвратить утечку памяти в JVM? 2. Как закрыть ссылку CloseableHttpCleint с каждым запросом от обоих серверов? пожалуйста, помогите.