NodeJS联接MySQL出现Cannot enqueue Handshake after invoking quit

NodeJS连接MySQL出现Cannot enqueue Handshake after invoking quit.
原因在于node连接上mysql后如果因网络原因丢失连接或者用户手工关闭连接后，原有的连接挂掉，需要重新连接；如下代码，每次访问结束都关闭，每次开始访问前重连接下，代码中没有监听连接的fatal错误，copy需谨慎

var mysql = require('mysql');

var connection = mysql.createConnection({
	host     : 'localhost',
	user     : 'root',
	password : '123456',
	database : 'test'
})
,slice = [].slice
;

var commonMethod = function(callback){
	connection = mysql.createConnection(connection.config);
	connection.connect();
	callback.call(connection,callback);
	connection.end();
};

var onerror = function(){
	console.log(err);
};

var query = function(){
	var args = arguments;
	commonMethod(function(){
		connection.query.apply(connection,args)
		.on('error',onerror);	
	});
};