When the Internet is disconnected, I can not connect via nodejs to mongodb. Where is the mistake?

Question

JavaScript

I connect through the console without any problems, but when I start the application it gives an error:

Error Connecting to database: { [MongoError: getaddrinfo ENOENT localhost:27017]
  name: 'MongoError',
  message: 'getaddrinfo ENOENT localhost:27017' }

Monoga connection string:

db: 'mongodb://' + (process.env.DB_PORT_27017_TCP_ADDR || 'localhost') + '/mean-dev',

Interestingly, when there is Internet on the computer, the node connects, and when I disconnect, it gives the error above.
Here is what I get when I start mongo without internet:

And here is what I get when I start mongo with internet:

WTF ? Why doesn't it work without internet?
I have everything offline. I use full stack
mean.io

Answer 1

message: 'getaddrinfo ENOENT localhost:27017'

"Can't get DNS for localhost domain - no internet."
In theory, for a localhost, there should be no recourse to DNS. Apparently, it is not registered in your hosts.
Change localhost to 127.0.0.1 and it should work.