RSelenium Connecting to a running server - r

Question

I am trying to use Rselenium to automate some of my more tedious reporting tasks
I have downloaded the Java virtual machine as per the instructions
I have gotten it running by using the code below
# Run the Command at the command line
cd selenium
java -jar selenium-server-standalone-3.0.1.jar
In R i then add the following code
require(RSelenium)
remDr <- remoteDriver(remoteServerAddr = "localhost"
, port = 4445L
, browserName = "firefox"
)
remDr <- remoteDriver(port = 4445L)
remDr$open()
When i run the last line i get the error
[1] "Connecting to remote server"
Error in checkError(res) :
Couldnt connect to host on http://localhost:4445/wd/hub.
Please ensure a Selenium server is running.
I can see in the command line window that the server is running as i am getting the message Selenium Server is up and Running
Can anyone see what I'm doing incorrectly?
Update
I have tried switching the port to 4444 as based on the advice below but i get the error
From the Cmd Prompt
Selenium message:The path to the driver executable must be set by the webdriver.gecko.driver system property; for more information, see https://github.com/mozilla/geckodriver. The latest version can be downloaded from https://github.com/mozilla/geckodriver/releases
From R
Error: Summary: UnknownError
Detail: An unknown server-side error occurred while processing the command.
class: java.lang.IllegalStateException
Further Details: run errorDetails method

Answer 1

From Firefox version 48 the gecko driver is also required to drive a Firefox browser with Selenium Server. The geckodriver can be downloaded at https://github.com/mozilla/geckodriver/releases. If you wish to run the Selenium server manually you should then either
Add the geckodriver path to PATH
Or set the webdriver.gecko.driver system property on the JVM
The second method would be done as:
java -Dwebdriver.gecko.driver="path-to-geckodriver" -jar selenium-server-standalone-3.0.1.jar
If you are running windows and have downloaded the Selenium standalone to C:\Selenium and the geckodriver to the same location then this would look like:
C:\Users\john>cd C:\Selenium
C:\Selenium>java -Dwebdriver.gecko.driver="C:\Selenium\geckodriver.exe" -jar selenium-server-standalone-3.0.1.jar
NOTE: on a 32bit windows machine you will need the 32bit geckodriver and on a 64bit machine the corresponding 64bit geckodriver.
Alternatively the recommended way to run a Selenium server with RSelenium is to run a Docker container which includes the Selenium Server, geckodriver and appropriate Firefox browser:
docker run -d -p 5901:5900 -p 127.0.0.1:4444:4444 --link http-server selenium/standalone-firefox-debug:3.0.1-barium
see the vignette at http://rpubs.com/johndharrison/RSelenium-Docker