Selenium: Invalid “already running” error when starting server

Question

I am trying to get the Selenium server up and running. However, when I type:

java -jar selenium-server-standalone-2.0b3.jar

I get an Exception

Answer 1

If you are using Windows, you can open the task manager and locate the java.exe or javaw.exe process and kill it. This will release port 4444 and you should be able to restart the Selenium server.