Application on the yarn rest api calls to kill

Application on the yarn rest api calls to kill

Call yarn reat api, application id get by app name

    public static String getApplicationID(String appName){
        String getAppsURL = "http://rm:8088/ws/v1/cluster/apps?queue=default";
        String apps = HttpClient.doGet(getAppsURL);
        JSONObject appsJsonObject = JSONObject.parseObject(apps);
        JSONArray appJsonArray = appsJsonObject.getJSONObject("apps").getJSONArray("app");
        JSONObject resultApp = null;
        for(int i=0;i<appJsonArray.size();i++){
            JSONObject tmpApp = appJsonArray.getJSONObject(i);
            String[] str = tmpApp.getString("name").split("\\.");
            if(str[str.length-1].equals(appName)){
                resultApp = tmpApp;
            }
        }
        if(resultApp != null){
            String applicationID = resultApp.getString("id");
            return applicationID;
        }
        return null;
    }

ssh connection nodes within a cluster, kill the application with command yarn application --kill

   public static boolean killApplication(String appid,String host,String username,String password) throws IOException{
        Connection conn= new Connection(host);
        Session ssh = null;
        conn.connect();
        boolean isconn=conn.authenticateWithPassword(username, password);
        if(!isconn){
            System.out.println("用户名称或者是密码不正确");
        }else{
            System.out.println("已经连接OK");
            ssh=conn.openSession();
            String command = "yarn application --kill "+appid;
            ssh.execCommand(command);
        }
        ssh.close();
        conn.close();
        return true;
    }

http get requests

   public static String doGet(String httpurl) {
        HttpURLConnection connection = null;
        InputStream is = null;
        BufferedReader br = null;
        String result = null;// 返回结果字符串
        try {
            // 创建远程url连接对象
            URL url = new URL(httpurl);
            // 通过远程url连接对象打开一个连接，强转成httpURLConnection类
            connection = (HttpURLConnection) url.openConnection();
            // 设置连接方式：get
            connection.setRequestMethod("GET");
            // 设置连接主机服务器的超时时间：15000毫秒
            connection.setConnectTimeout(15000);
            // 设置读取远程返回的数据时间：60000毫秒
            connection.setReadTimeout(60000);
            // 发送请求
            connection.connect();
            // 通过connection连接，获取输入流
            if (connection.getResponseCode() == 200) {
                is = connection.getInputStream();
                // 封装输入流is，并指定字符集
                br = new BufferedReader(new InputStreamReader(is, "UTF-8"));
                // 存放数据
                StringBuffer sbf = new StringBuffer();
                String temp = null;
                while ((temp = br.readLine()) != null) {
                    sbf.append(temp);
                    sbf.append("\r\n");
                }
                result = sbf.toString();
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            // 关闭资源
            if (null != br) {
                try {
                    br.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

            if (null != is) {
                try {
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

            connection.disconnect();// 关闭远程连接
        }

        return result;
    }

main method

    public static void main(String[] args) {
        String host = "";
        String username = "";
        String password = "";
        String appName= "";
        String appID=getApplicationID(appName);
        try {
            killApplication(appID,host,username,password);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }