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Selenium: Invalid "already running" error when starting server

Asked 2011-05-04T12:36:31.967
39

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:

Selenium is already running on port 4444. Or some other service is.

I have tried to stop it, just in case it really is running:

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

That gets me the message:

ERROR Server Exception: sessionId should not be null; has this session been started yet?

If I just write:

http://localhost:4444/

I get:

HTTP ERROR: 403
Forbidden for Proxy

Ideas?

selenium
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3 Answers

1

I had the same problem , I started my Jboss AP where i have my application deployed and after that tried to run the selenium server and couldn t start. The problem was that Jboss uses the same port that Selenium server uses, so what I did is to start selenium server on a different port

Solution:

java -jar selenium-server-standalone-2.0b3.jar -port 1234 -htmlSuite "*firefox" "http://localhost:8080/" "path to the suite" "path to the results"
answered 2011-05-11T19:50:55.650
0

If you get a 403 error on 127.0.01:4444 and not a 404 one, something is running there. (You're positive it cannot be a previous instance Selenium ? It'd be the most logical.)

Sometimes Selenium continue running in the background after an unexpected exit. I'd suggest checking the running processes, or rebooting the machine if everything else fails.

It happens to me frequently when Hudson asks Selenium-Server to run some tests and it fails in the middle for some reasons. Killing the process solves the problem.

answered 2011-05-04T13:25:48.507
0

If all the above is not working, please save your work and reboot your system. It will solve the problem

answered 2011-05-10T00:39:23.190

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