Sep 25, 2011 11:51:05 AM org.openqa.grid.selenium.GridLauncher main
INFO: Launching a standalone server
11:51:05.322 INFO - Java: Sun Microsystems Inc. 20.0-b11
11:51:05.325 INFO - OS: Windows Vista 6.0 x86
11:51:05.340 INFO - v2.7.0, with Core v2.7.0. Built from revision 13926
11:51:05.575 INFO - RemoteWebDriver instances should connect to: http://127.0.0.1:4444/wd/hub
11:51:05.578 INFO - Version Jetty/5.1.x
11:51:05.581 INFO - Started HttpContext[/selenium-server/driver,/selenium-server/driver]
11:51:05.583 INFO - Started HttpContext[/selenium-server,/selenium-server]
11:51:05.584 INFO - Started HttpContext[/,/]
11:51:05.632 INFO - Started org.openqa.jetty.jetty.servlet.ServletHandler@87816d
11:51:05.633 INFO - Started HttpContext[/wd,/wd]
11:51:05.639 INFO - Started SocketListener on 0.0.0.0:4444
11:51:05.640 INFO - Started org.openqa.jetty.jetty.Server@1050e1f
11:52:40.694 INFO - Executing: [new session: {platform=ANY, javascriptEnabled=true, browserName=firefox, nativeEvents=false, version=}] at URL: /session)
11:52:47.391 INFO - Done: /session
11:52:47.408 INFO - Executing: org.openqa.selenium.remote.server.handler.GetSessionCapabilities@1cc5069 at URL: /session/1316976665486)
11:52:47.410 INFO - Done: /session/1316976665486
11:52:47.411 INFO - WebDriver remote server: Fatal, unhandled exception: /session/1316976665486: java.util.concurrent.ExecutionException: java.lang.NullPointerException
11:52:47.412 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)
11:52:47.419 WARN - /wd/hub/session/1316976665486:
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)
11:52:47.457 INFO - Executing: [get: http://www.yahoo.com] at URL: /session/1316976665486/url)
11:52:49.212 INFO - Done: /session/1316976665486/url
11:52:49.230 INFO - Executing: [find element: By.tagName: a] at URL: /session/1316976665486/element)
11:52:49.563 INFO - Done: /session/1316976665486/element
11:52:49.583 INFO - Executing: [delete session: 1316976665486] at URL: /session/1316976665486)
11:52:50.873 INFO - Done: /session/1316976665486