当我调用CloseableHttpClient对象的execute方法时，我的程序冻结了

Question

我有一个程序每分钟调查一次比特币价格信息。运行约2小时后，它会冻结。

我发现execute类的方法CloseableHttpClient导致它冻结。我通过输入很多印刷语句找到了这个。 （程序在eclipse中运行）

public PriceTicket[] getFirstDaysSale() throws IOException {
    ////////////////////////////////////////////////////////
    // Gdet first curser for price data
    HttpGet getRequest = new 
      HttpGet("https://api.exchange.coinbase.com/products/BTC-USD/trades");

    System.out.print("create athentication");
    Authentication.setNonAuthenticationHeaders(getRequest);
    CloseableHttpClient temp = HttpClients.createDefault();    

    String g;
    System.out.print("Startexec");

    //PROGRAM WILL FREEZE HERE
    CloseableHttpResponse response = temp.execute(getRequest);

    System.out.print("end exec");
    Header h = response.getFirstHeader("CB-AFTER");
    nextCurId=h.getValue();
    System.out.print("create reader");
    BufferedReader br = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
    System.out.print("create json");
    String json = processStream(br);
    Gson gson = new Gson();
    PriceTicket[] priceData = gson.fromJson(json, PriceTicket[].class);
    return priceData;
}

控制台输出：

......
......
create athentication
Startexec

程序在此处停止