Because of what the server does not rise on nodejs running ubuntu?

Question

ubuntu

Hello! I set up a server here on nodejs running ubuntu. I built nodejs from source, installed NPM, loaded all modules. In general, everything is ok. I tried to start the server and got this warning:

The server starts successfully and does not cause any errors. But this notification is annoying me.
Google did not give an answer, aptitude on the request "bson" too.

Answer 1

The error is nothing to worry about. It's just that instead of the native bson, the JS implementation is used.
The binary bson comes with the C driver for MongoDB. Here is its source https://github.com/mongodb/mongo-c-driver/tree/master/src/bson.c