Sep 24, 2011 6:53:53 PM org.openqa.grid.selenium.GridLauncher main
INFO: Launching a standalone server
18:53:53.356 INFO - Java: Sun Microsystems Inc. 20.0-b11
18:53:53.361 INFO - OS: Windows Vista 6.0 x86
18:53:53.382 INFO - v2.7.0, with Core v2.7.0. Built from revision 13926
18:53:53.740 INFO - RemoteWebDriver instances should connect to: http://127.0.0.1:4444/wd/hub
18:53:53.743 INFO - Version Jetty/5.1.x
18:53:53.746 INFO - Started HttpContext[/selenium-server/driver,/selenium-server/driver]
18:53:53.749 INFO - Started HttpContext[/selenium-server,/selenium-server]
18:53:53.750 INFO - Started HttpContext[/,/]
18:53:53.823 INFO - Started org.openqa.jetty.jetty.servlet.ServletHandler@15b7986
18:53:53.824 INFO - Started HttpContext[/wd,/wd]
18:53:53.831 INFO - Started SocketListener on 0.0.0.0:4444
18:53:53.832 INFO - Started org.openqa.jetty.jetty.Server@1050e1f
18:54:16.337 INFO - Executing: [new session: {javascriptEnabled=true, browserName=firefox, nativeEvents=false, version=}] at URL: /session)
18:54:22.984 INFO - Done: /session
18:54:23.003 INFO - Executing: org.openqa.selenium.remote.server.handler.GetSessionCapabilities@1ce85c4 at URL: /session/1316915633606)
18:54:23.004 INFO - Done: /session/1316915633606
18:54:23.007 INFO - WebDriver remote server: Fatal, unhandled exception: /session/1316915633606: java.util.concurrent.ExecutionException: java.lang.NullPointerException
18:54:23.008 WARN - EXCEPTION
javax.servlet.ServletException: java.util.concurrent.ExecutionException: java.lang.NullPointerException
        at org.openqa.selenium.remote.server.DriverServlet.handleRequest(DriverServlet.java:454)
        at org.openqa.selenium.remote.server.DriverServlet.doGet(DriverServlet.java:426)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
        at org.openqa.jetty.jetty.servlet.ServletHolder.handle(ServletHolder.java:428)
        at org.openqa.jetty.jetty.servlet.ServletHandler.dispatch(ServletHandler.java:677)
        at org.openqa.jetty.jetty.servlet.ServletHandler.handle(ServletHandler.java:568)
        at org.openqa.jetty.http.HttpContext.handle(HttpContext.java:1530)
        at org.openqa.jetty.http.HttpContext.handle(HttpContext.java:1482)
        at org.openqa.jetty.http.HttpServer.service(HttpServer.java:909)
        at org.openqa.jetty.http.HttpConnection.service(HttpConnection.java:820)
        at org.openqa.jetty.http.HttpConnection.handleNext(HttpConnection.java:986)
        at org.openqa.jetty.http.HttpConnection.handle(HttpConnection.java:837)
        at org.openqa.jetty.http.SocketListener.handleConnection(SocketListener.java:243)
        at org.openqa.jetty.util.ThreadedServer.handle(ThreadedServer.java:357)
        at org.openqa.jetty.util.ThreadPool$PoolThread.run(ThreadPool.java:534)
Caused by: java.util.concurrent.ExecutionException: java.lang.NullPointerException
        at java.util.concurrent.FutureTask$Sync.innerGet(Unknown Source)
        at java.util.concurrent.FutureTask.get(Unknown Source)
        at org.openqa.selenium.remote.server.DefaultSession.execute(DefaultSession.java:118)
        at org.openqa.selenium.remote.server.handler.WebDriverHandler.execute(WebDriverHandler.java:90)
        at org.openqa.selenium.remote.server.rest.ResultConfig.handle(ResultConfig.java:203)
        at org.openqa.selenium.remote.server.DriverServlet.handleRequest(DriverServlet.java:450)
        ... 15 more
Caused by: java.lang.NullPointerException
        at org.openqa.selenium.remote.server.renderer.ForwardResult.render(ForwardResult.java:39)
        at org.openqa.selenium.remote.server.rest.ResultConfig$1.call(ResultConfig.java:198)
        at org.openqa.selenium.remote.server.rest.ResultConfig$1.call(ResultConfig.java:1)
        at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
        at java.util.concurrent.FutureTask.run(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
18:54:23.022 WARN - /wd/hub/session/1316915633606:
java.util.concurrent.ExecutionException: java.lang.NullPointerException
        at java.util.concurrent.FutureTask$Sync.innerGet(Unknown Source)
        at java.util.concurrent.FutureTask.get(Unknown Source)
        at org.openqa.selenium.remote.server.DefaultSession.execute(DefaultSession.java:118)
        at org.openqa.selenium.remote.server.handler.WebDriverHandler.execute(WebDriverHandler.java:90)
        at org.openqa.selenium.remote.server.rest.ResultConfig.handle(ResultConfig.java:203)
        at org.openqa.selenium.remote.server.DriverServlet.handleRequest(DriverServlet.java:450)
        at org.openqa.selenium.remote.server.DriverServlet.doGet(DriverServlet.java:426)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
        at org.openqa.jetty.jetty.servlet.ServletHolder.handle(ServletHolder.java:428)
        at org.openqa.jetty.jetty.servlet.ServletHandler.dispatch(ServletHandler.java:677)
        at org.openqa.jetty.jetty.servlet.ServletHandler.handle(ServletHandler.java:568)
        at org.openqa.jetty.http.HttpContext.handle(HttpContext.java:1530)
        at org.openqa.jetty.http.HttpContext.handle(HttpContext.java:1482)
        at org.openqa.jetty.http.HttpServer.service(HttpServer.java:909)
        at org.openqa.jetty.http.HttpConnection.service(HttpConnection.java:820)
        at org.openqa.jetty.http.HttpConnection.handleNext(HttpConnection.java:986)
        at org.openqa.jetty.http.HttpConnection.handle(HttpConnection.java:837)
        at org.openqa.jetty.http.SocketListener.handleConnection(SocketListener.java:243)
        at org.openqa.jetty.util.ThreadedServer.handle(ThreadedServer.java:357)
        at org.openqa.jetty.util.ThreadPool$PoolThread.run(ThreadPool.java:534)
Caused by: java.lang.NullPointerException
        at org.openqa.selenium.remote.server.renderer.ForwardResult.render(ForwardResult.java:39)
        at org.openqa.selenium.remote.server.rest.ResultConfig$1.call(ResultConfig.java:198)
        at org.openqa.selenium.remote.server.rest.ResultConfig$1.call(ResultConfig.java:1)
        at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
        at java.util.concurrent.FutureTask.run(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)