client.js

require('skywalking-nodejs').start({
  applicationCode: 'test'
});

let requestModule = require("request");

var http = require('http');
const port = 3001

callback = function (response) {
  var str = ''
  response.on('data', function (chunk) {
    str += chunk;
  });

  response.on('end', function () {
    console.log(str);
  });
}

const requestHandler = (request, response) => {
  requestModule('http://localhost:3000/1', function (error, response, body) {
    console.log('error:', error); // Print the error if one occurred
    console.log('statusCode:', response && response.statusCode); // Print the response status code if a response was received
    console.log('body:', body); // Print the HTML for the Google homepage.
  });
}

const server = http.createServer(requestHandler)

server.listen(port, (err) => {
  if (err) {
    return console.log('something bad happened', err)
  }
  console.log(`server is listening on ${port}`)
})

server.js

require('skywalking-nodejs').start({
    applicationCode: 'test1'
});

const http = require('http')
var mysql = require('mysql');
const port = 3000

const requestHandler = (request, response) => {
    var connection = mysql.createConnection({
        host: 'localhost',
        port: 3307,
        user: 'root',
        password: 'root',
        database: 'test'
    });

    connection.connect();

    connection.query('SELECT SLEEP(1)', function (error, results, fields) {
        if (error) throw error;

        connection = mysql.createConnection({
            host: 'localhost',
            port: 3307,
            user: 'root',
            password: 'root',
            database: 'test'
        });

        connection.connect();

        connection.query('SELECT SLEEP(3)', function (error, results, fields) {
            if (error) throw error;
        });
    });

    connection.query('SELECT SLEEP(2)', function (error, results, fields) {
        if (error) throw error;
    });

    response.end("test");
}

const serverB = http.createServer(requestHandler)

serverB.listen(port, (err) => {
    if (err) {
        return console.log('something bad happened', err)
    }
    console.log(`server is listening on ${port}`)
})