Warning: connect.session() MemoryStore is not designed for a production environment, as it will leak memory, and will not scale past a single process

I hope this would help to someone who's struggling the same problem as mine . Just dug it by myself .

//-momery unleaked---------
app.set('trust proxy', 1);

app.use(session({
cookie:{
    secure: true,
    maxAge:60000
       },
store: new RedisStore(),
secret: 'secret',
saveUninitialized: true,
resave: false
}));

app.use(function(req,res,next){
if(!req.session){
    return next(new Error('Oh no')) //handle error
}
next() //otherwise continue
});

Using cookie-session instead of express-session solved this issue for me.

You store the session on the client and not on the server with cookies.

Simply:

1. Install it with npm install cookie-session
2. Change

   var session = require('express-session');

   to var session = require('cookie-session');

It's all about storing sessions, you should add a storing system that store sessions into your database. This help your app to manage sessions.

For example, in mongodb you can use connect-mongo, you should found a store package and for other databases.

https://www.npmjs.com/package/connect-mongo

const session = require('express-session');
const MongoStore = require('connect-mongo')(session);

app.use(session({
    secret: 'foo',
    store: new MongoStore(options)
}));