'use strict'; const net = require('net'); var errors = 0, connections = 0; function connect() { process.nextTick(function() { var s = net.Stream(); var gotConnected = false; s.connect(9000); s.on('connect', function() { gotConnected = true; connections++; connect(); }); s.on('close', function() { if (gotConnected) connections--; }); s.on('error', function() { errors++; }); }); } connect(); var oldConnections, oldErrors; // Try to start new connections every so often setInterval(connect, 5000); setInterval(function() { if (oldConnections != connections) { oldConnections = connections; console.log('CLIENT %d connections: %d', process.pid, connections); } if (oldErrors != errors) { oldErrors = errors; console.log('CLIENT %d errors: %d', process.pid, errors); } }, 1000);