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Tuesday, September 16, 2008

How to over come "Failed to start: SocketListener0@"

This is the most common error which is encountered while starting the
selenium server. The origin of this error is the fact that selenium server always
tries to listen at port 4444 by default so when following is written at command
prompt -

java -jar selenium-server.jar

The server starts running on port 4444 but if this post is already occupied
then server will fail to listen at this port and following error will be
encountered -

Failed to start: SocketListener0@

To over come this one can force server to listen at port any other port while
starting the selenium server as following -

java -jar selenium-server.jar -port 5555

and this will start server as following -

10:55:14.440 INFO - Java: Sun Microsystems Inc. 1.5.0_05-b05
10:55:14.440 INFO - OS: Windows XP 5.1 x86
10:55:14.456 INFO - v1.0-SNAPSHOT [1123], with Core v1.0-SNAPSHOT [2101]
10:55:14.549 INFO - Version Jetty/5.1.x
10:55:14.549 INFO - Started HttpContext[/,/]
10:55:14.549 INFO - Started HttpContext[/selenium-server,/selenium-server]
10:55:14.549 INFO - Started
10:55:14.565 INFO - Started SocketListener on
10:55:14.565 INFO - Started org.mortbay.jetty.Server@e0e1c6
If same error is encountered again then keep changing port till server gets
started on a port.

You could also shut down Selenium Server using following URL in your browser -


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