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

The error message Selenium offers up is a little confusing. It really should be telling you you're making a syntax error. I had this problem as well. Make sure the cmd string is PRECISELY like this:

http://localhost:4444/selenium-server/driver/?cmd=shutDownSeleniumServer

That means using the full command shutDownSeleniumServer, and make sure the s in shut is lower-case (That was my mistake).

Hope this helps.