Angular2-Meteor : Database (mysql) closing error

angular
1

Am using mysql within my angular2-meteor app , am trying to conclude a full transaction including opening , inserting … and closing my database.

i’m confronting a problem of a closed socket which causes a full crash of my app when i’m closing it , here is my code and the error ,

if there is any propositions ???

  • My code :*
  1. Main.ts

import {loaduser} from “./load-users”;

if(Meteor.isServer){
Meteor.onConnection(loaduser)
}
2) My function :(load-users.ts)

var Users: Mysql.Collection;
var db : Mysql.MeteorDatabase;
export function loaduser() {

    if(!db) {
        connexion();
    }
traitement();

db.end(function(err){ //the error is here });
function connexion() {
var connectionSettings = {
host: ‘localhost’,
user: ‘root’,
port: 3300,
password: ‘’,
database: ‘my_db’
};
db = Mysql.connect(connectionSettings);
}
function traitement (){

    Users = db.meteorCollection<Object>("users", "usersCollection");
    console.log("condition " + Users.find().count());
}

};
3) The error :

W20160413-16:37:48.281(2)? (STDERR) throw err; W20160413-16:37:48.281(2)? (STDERR) ^ W20160413-16:37:48.281(2)? (STDERR) Error: This socket is closed. W20160413-16:37:48.281(2)? (STDERR) at Socket._write (net.js:638:19)
ANy ideas ?