node.js dgram socket send doesn't work from within process.on('xxxx')

dgram_in_processon_issue

var http = require("http");
var dgram = require('dgram');

process.on('uncaughtException', function(err) {
	console.log(err);
	
	var message = new Buffer("bad things happened uncaughtException");
	var client3 = dgram.createSocket("udp4");
	client3.send(message, 0, message.length, 514, "127.0.0.1");
	process.exit(1);
});
process.on('SIGINT', function(err) {
	console.log('in SIGINT');
	var message = new Buffer("Some bytes sigint");
	var client2 = dgram.createSocket("udp4");
	client2.send(message, 0, message.length, 514, "127.0.0.1");
	process.exit(1);
});

	console.log('in main');
	var message = new Buffer("in main");
	var client1 = dgram.createSocket("udp4");
	client1.send(message, 0, message.length, 514, "127.0.0.1");


http.createServer(function(request, response) {
	throw new Error('some error');
}).listen(3003);