httpclient - CloseableHttpClient : connection hangs forever

Question

我对 CloseableHttpClient 管理的连接有问题。
Spring 服务管理 ny 连接:

@Service
public class MyService {
...
    private CloseableHttpClient closeableHttpClient;

    public String setPayment() {
...
        try {
            HttpPost httpPost = new HttpPost(url);
            httpPost.setHeader(ACCEPT, APP_JSON);
            httpPost.setHeader(CONTENT_TYPE, APP_JSON);
            StringEntity entity = new StringEntity(request, CHARSET);
            httpPost.setEntity(entity);
            CloseableHttpResponse response = closeableHttpClient.execute(httpPost);
            logger.info("Execution");
        } catch (IOException e) {
            logger.error("Error");
        }
    }
}

当执行不成功时，我的 setPayment 方法最多被调用 3 次。有时在第一次执行后我的方法挂起没有响应。
欢迎任何建议。

Answer 1

我建议您执行以下操作:

1)在构造函数中设置超时:

public MyService() {
        int timeout = 180;      
        RequestConfig config = RequestConfig.custom()
                .setConnectTimeout(timeout * 1000)
                .setConnectionRequestTimeout(timeout * 1000)
                .setSocketTimeout(timeout * 1000).build();
        closeableHttpClient = HttpClientBuilder.create().setDefaultRequestConfig(config).build();
    }

2)使用try-with-resources来管理CloseableHttpResponse

    public String setPayment() {
    ...

                HttpPost httpPost = new HttpPost(url);
                httpPost.setHeader(ACCEPT, APP_JSON);
                httpPost.setHeader(CONTENT_TYPE, APP_JSON);
                StringEntity entity = new StringEntity(request, CHARSET);
                httpPost.setEntity(entity);
try (CloseableHttpResponse response = closeableHttpClient.execute(httpPost)){                
                logger.info("Execution");
            } catch (IOException e) {
                logger.error("Error");
            }
        }