Port not available. Exiting... for golang selenium webdriver

I use selenium golang webdriver example.

package main

import (
	"github.com/fedesog/webdriver"
	"log"
	"time"
)

func main() {
	chromeDriver := webdriver.NewChromeDriver("/path/To/Chrome/Driver/chromedriver")
	err := chromeDriver.Start()
	if err != nil {
		log.Println(err)
	}
	desired := webdriver.Capabilities{"Platform": "Linux"}
	required := webdriver.Capabilities{}
	session, err := chromeDriver.NewSession(desired, required)
	if err != nil {
		log.Println(err)
	}
	err = session.Url("http://golang.org")
	if err != nil {
		log.Println(err)
	}
	time.Sleep(10 * time.Second)
	session.Delete()
	chromeDriver.Stop()
}

It works but logs error:

Port not available. Exiting..

Full output is :

Starting ChromeDriver (v2.9.248307) on port 9515
Port not available. Exiting...

It looks as though the fedesog/webdriver is trying to open up a listener on port 9515 and that is failing:

https://github.com/fedesog/webdriver/blob/master/chromedriver.go

You could try switching ports or seeing what if anything might be blocking that port on your machine.

Try to check chromedriver log or run it from console.

It maybe some package dependencies like dbus.