CloseableHttpClient 連線超時導致XxlJob排程阻塞,影響排程任務的執行

oktokeep發表於2024-05-22

CloseableHttpClient 連線超時導致XxlJob排程阻塞,影響排程任務的執行

問題原因
1.分析日誌發現,xxlJob後臺介面沒有執行時間和執行結果,在某一個時間點之後,某一個任務因為阻塞全部執行失敗,影響業務系統未正常進行。比如:定時投保,購買保險等。
2.臨時解決:先重啟服務,XxlJob恢復排程,可以正常執行任務。
3.最佳化解決:排查logger日誌,發現請求的日誌有,返回的日誌沒有,分析程式碼發現,CloseableHttpClient未設定超時時間,加上該程式碼,重新上線。
4.業務資料的拉取,提供給業務方來做線下處理等操作。
5.加上python監控,根據SQL查詢業務執行結果,每隔2個小時查詢一次,如果沒有執行結果,則報警提示。達到監控的目的。

DEMO程式碼示例:

package com.example.core.mydemo.http.httpclient;

import com.alibaba.fastjson.JSON;
import com.example.core.mydemo.http.CancelOrderReqVO;
import com.example.core.mydemo.http.CancelRenyunOrderReqVO;
import com.example.core.mydemo.json2.GsonUtils;
import org.apache.http.HttpEntity;
import org.apache.http.StatusLine;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.springframework.http.HttpStatus;

import java.io.IOException;
import java.nio.charset.StandardCharsets;

public class CloseableHttpTest {

    public static void main(String[] args) throws Exception {
        CancelOrderReqVO data = new CancelOrderReqVO();
        data.setOrderNum("111123333");
        data.setServerType("1");

        //僅僅測試
        String url = "http://www.baidu.com";

        String jsonParam = GsonUtils.toJson(data);
        System.out.println("呼叫外部介面入參jsonParam:{}" + jsonParam);
        String resJson = doPost(url,jsonParam);
        System.out.println("呼叫外部介面返回:{}" + resJson);

    }
    static String doPost(String url, String params) throws Exception {
        CloseableHttpClient httpclient = HttpClients.createDefault();
        HttpPost httpPost = new HttpPost(url);// 建立httpPost
        System.out.println("請求url:"+url+",param:" + JSON.toJSONString(params));
        httpPost.setHeader("Accept", "application/json;charset=utf-8");
        httpPost.setHeader("Content-Type", "application/json;charset=utf-8");
        String charSet = "UTF-8";
        StringEntity entity = new StringEntity(params, charSet);
        httpPost.setEntity(entity);
        //設定超時時間【關鍵】
        // 設定連線超時時間(毫秒)
        int connectTimeout = 10000;
        // 設定讀取超時時間(毫秒)
        int socketTimeout = 10000;
        // 設定從連線池中獲取連線的超時時間(毫秒)
        int connectionRequestTimeout = 10000;
        RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(socketTimeout).setConnectTimeout(connectTimeout).setConnectionRequestTimeout(connectionRequestTimeout).build();
        httpPost.setConfig(requestConfig);

        CloseableHttpResponse response = null;
        try {
            response = httpclient.execute(httpPost);
            StatusLine status = response.getStatusLine();
            int state = status.getStatusCode();
            if (state == HttpStatus.OK.value()) {
                HttpEntity responseEntity = response.getEntity();
                String jsonString = EntityUtils.toString(responseEntity);
//                return new String(jsonString.getBytes(),"UTF-8");
                return jsonString;
            } else{
                //logger.error("請求返回:"+state+"("+url+")");
            }
        } finally {
            if (response != null) {
                try {
                    response.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            try {
                httpclient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return null;
    }
}

相關文章