Node Http server - request received twice

I am learning Node.js and I have created this simple http server.

var http = require('http');

var server = http.createServer(function(req,res){
    console.log('request accepted');
    res.end();
});

server.listen(3000,function(){
    console.log("Server listening on port #3000");
});

It is working fine but when I visit http://localhost:3000/ the console logs request accepted thing twice. In short, if I'm understanding correctly, the request is received twice.

Is it a correct behavior or am I doing something wrong here?