mongodb - Mongoose Disconnect/reconnect Issue -

i using mongoose@4.0.4, whenever manually disconnect mongodb, mongoose disconnect/reconnect event not fired corrected, reconnect event fired , disconnect not being fired every time mongodb disconnect/started manually. problem handle mongodb connect , disconnected status every request made server see status of mongodb connection/disconnection , send appropriate response(may 500 code) because request hangs in middle if mongodb not connected. see if version issue stated version 3.8.x , went 4.0.4 see events fired properly. able catch reconnect event version 4.0.x not disconnect event. wanted know version can use connect/disconnect events fired or way handle issue.

below code handle events

var db = mongoose.connection; var connected; db.on('open', function (ref) {     connected = true;     console.log('open connection mongo server.'); });  db.on('connected', function (ref) {     global.mongo_conn=true;     console.log('connected connection mongo server.'); });  db.on('disconnected', function (ref) {     connected = false;     console.log('disconnected connection.'); }); db.on('disconnect', function (err) {     console.log('error...disconnect', err); }); db.on('connecting', function (ref) {     connected = false;     console.log('connecting.'); });  db.on('close', function (ref) {     global.mongo_conn=false;     console.log('close connection.');     connect(); });  db.on('error', function (ref) {     connected = false;     console.log('error connection.');     //mongoose.disconnect();     global.mongo_conn=false; });  db.on('reconnected', function () {     global.mongo_conn=true;     console.log('mongodb reconnected!'); }); db.on('reconnecting', function () {     global.mongo_conn=true;     console.log('reconnecting!'); }); function connect() {     mongoose.connect(config.mongo.uri, opts); }  connect(); 

mongoose.connect(url,     {       server: {           auto_reconnect: true,          reconnecttries: number.max_value,          reconnectinterval: 1000,          socketoptions: {keepalive: 1, connecttimeoutms: 30000}       }     } );