By: Kathy

Kathy — Thu, 23 Jun 2011 14:00:49 +0000

I’m running into a strange problem with multiple uses on the same server. I log into one (my development system), and launch the selenium server on port 4444. Then I log into the system as a different user (QA System) from a different computer and launch the selenium server on port 4445. When I try to run a script from the QA System, the script runs, but the browser displays on the development system. All the user shows is the console and status of the test. If I shut down the server on the development system, I will get an error when I try to run a script from the QA system saying the server session should not be null (full text below). Has anyone run into this? (BTW, I’m running Firefox with separate profiles)

Thanks,

Kathy

09:58:14.852 INFO – Java: Sun Microsystems Inc. 19.1-b02
09:58:14.852 INFO – OS: Windows 2003 5.2 x86
09:58:14.868 INFO – v1.0.1 [2696], with Core v@VERSION@ [@REVISION@]
09:58:14.993 INFO – Version Jetty/5.1.x
09:58:14.993 INFO – Started HttpContext[/selenium-server/driver,/selenium-server
/driver]
09:58:14.993 INFO – Started HttpContext[/selenium-server,/selenium-server]
09:58:14.993 INFO – Started HttpContext[/,/]
09:58:15.024 INFO – Started SocketListener on 0.0.0.0:4445
09:58:15.024 INFO – Started org.mortbay.jetty.Server@1960f05
09:58:26.836 INFO – Checking Resource aliases
09:58:26.852 INFO – Command request: deleteAllVisibleCookies[, ] on session null

09:58:26.852 ERROR – Exception running ‘deleteAllVisibleCookies ‘command on sess
ion null
java.lang.NullPointerException: sessionId should not be null; has this session b
een started yet?
at org.openqa.selenium.server.FrameGroupCommandQueueSet.getQueueSet(Fram
eGroupCommandQueueSet.java:214)
at org.openqa.selenium.server.commands.SeleniumCoreCommand.execute(Selen
iumCoreCommand.java:34)
at org.openqa.selenium.server.SeleniumDriverResourceHandler.doCommand(Se
leniumDriverResourceHandler.java:549)
at org.openqa.selenium.server.SeleniumDriverResourceHandler.handleComman
dRequest(SeleniumDriverResourceHandler.java:364)
at org.openqa.selenium.server.SeleniumDriverResourceHandler.handle(Selen
iumDriverResourceHandler.java:125)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1530)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1482)
at org.mortbay.http.HttpServer.service(HttpServer.java:909)
at org.mortbay.http.HttpConnection.service(HttpConnection.java:820)
at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:986)
at org.mortbay.http.HttpConnection.handle(HttpConnection.java:837)
at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:
245)
at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)
09:58:26.852 INFO – Got result: ERROR Server Exception: sessionId should not be
null; has this session been started yet? on session null
09:58:26.868 INFO – Command request: getLocation[, ] on session null
09:58:26.868 ERROR – Exception running ‘getLocation ‘command on session null
java.lang.NullPointerException: sessionId should not be null; has this session b
een started yet?
at org.openqa.selenium.server.FrameGroupCommandQueueSet.getQueueSet(Fram
eGroupCommandQueueSet.java:214)
at org.openqa.selenium.server.commands.SeleniumCoreCommand.execute(Selen
iumCoreCommand.java:34)
at org.openqa.selenium.server.SeleniumDriverResourceHandler.doCommand(Se
leniumDriverResourceHandler.java:549)
at org.openqa.selenium.server.SeleniumDriverResourceHandler.handleComman
dRequest(SeleniumDriverResourceHandler.java:364)
at org.openqa.selenium.server.SeleniumDriverResourceHandler.handle(Selen
iumDriverResourceHandler.java:125)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1530)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1482)
at org.mortbay.http.HttpServer.service(HttpServer.java:909)
at org.mortbay.http.HttpConnection.service(HttpConnection.java:820)
at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:986)
at org.mortbay.http.HttpConnection.handle(HttpConnection.java:837)
at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:
245)
at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)
09:58:26.868 INFO – Got result: ERROR Server Exception: sessionId should not be
null; has this session been started yet? on session null

By: Raghu

Raghu — Tue, 22 Jun 2010 05:07:27 +0000

hi all,
I am learning the Selenium, but i need the information regarding Selenium, How can i connect the perl client driver with selenium and how can i configure with IDE.
I was searching in the net but i didn’t get the much information.

With Regards,
V Raghu.

By: holminator

holminator — Fri, 27 Nov 2009 13:04:13 +0000

I am using Selenium RC at work. Up to 4 clients may run tests on a single server including IE. The reason for the IE browsers to interfere is:

“For firefox, user can create a user profiles, and specify a profile for a particular test, therefore, multiple tests can run concurrently on the same machine. For IE, Selenium RC modify registry settings and configures the LAN connection settings directly, therefore only a single test can be run on a single machine.”
(from http://khaidoan.wikidot.com/selenium-rc)

My solution:
I created 4 windows users each running a selenium rc server (on different ports of course) – so the IE browsers cannot interact with each other. BUT: The 4 users must all be logged on otherwise the IE does not start (they may be inactive or disconnected).
But be sure to have enough CPU power – IE is 5-10 (!) times slower than firefox, which may cause waitFor-commands to time out.

By: Young

Young — Tue, 20 Oct 2009 04:34:32 +0000

Works well with Firefox. Does not seem to work with Internet Explorer.

Selenium tests always try to re-use the existing IE window (instead of launching a new IE window), causing tests to collide in the same IE window.

By: anil

anil — Thu, 16 Jul 2009 11:27:42 +0000

means we can run multiple RC one with each browser at a time? if so then it is great

By: Php Class Tutorial

Php Class Tutorial — Sat, 28 Jun 2008 15:47:13 +0000

Good site I “Stumbledupon” it today and gave it a stumble for you.. looking forward to seeing what else you have..later

By: João Prado Maia’s Weblog » Using Selenium RC with multiple users

João Prado Maia’s Weblog » Using Selenium RC with multiple users — Thu, 26 Jun 2008 19:17:50 +0000

[...] Fox (from Alert Logic too) wrote a very good tutorial on how to run Selenium RC to execute unit tests in a team [...]