org.openqa.selenium.WebDriverException: Error forwarding the new session Empty pool of VM for setup Capabilities [{browserName=firefox, version=, platform=ANY}] Command duration or timeout: 181 milliseconds Build info: version: '2.40.0', revision: '4c5c0568b004f67810ee41c459549aa4b09c651e', time: '2014-02-19 11:13:01' System info: host: 'Sarads-MBP.fios-router.home', ip: '192.168.1.182', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.12.2', java.version: '1.8.0_91' Driver info: org.openqa.selenium.remote.RemoteWebDriver at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:193) at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:145) at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:573) at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:218) at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:113) at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:131) at com.javacodegeeks.seleniumexample.SeleniumGridDocker.SeleniumGridDocker.Driver(SeleniumGridDocker.java:35) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:84) at org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:564) at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:213) at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:138) at org.testng.TestRunner.beforeRun(TestRunner.java:641) at org.testng.TestRunner.run(TestRunner.java:609) at org.testng.SuiteRunner.runTest(SuiteRunner.java:348) at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:343) at org.testng.SuiteRunner.privateRun(SuiteRunner.java:305) at org.testng.SuiteRunner.run(SuiteRunner.java:254) at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52) at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86) at org.testng.TestNG.runSuitesSequentially(TestNG.java:1224) at org.testng.TestNG.runSuitesLocally(TestNG.java:1149) at org.testng.TestNG.run(TestNG.java:1057) at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:132) at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:236) at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:81) Caused by: org.openqa.selenium.remote.ErrorHandler$UnknownServerException: Error forwarding the new session Empty pool of VM for setup Capabilities [{browserName=firefox, version=, platform=ANY}] Build info: version: '2.40.0', revision: '4c5c0568b004f67810ee41c459549aa4b09c651e', time: '2014-02-19 11:13:01' System info: host: 'Sarads-MBP.fios-router.home', ip: '192.168.1.182', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.12.2', java.version: '1.8.0_91' Driver info: driver.version: unknown at org.openqa.grid.web.servlet.handler.RequestHandler.process(RequestHandler.java:113) at org.openqa.grid.web.servlet.DriverServlet.process(DriverServlet.java:83) at org.openqa.grid.web.servlet.DriverServlet.doPost(DriverServlet.java:67) at javax.servlet.http.HttpServlet.service(HttpServlet.java:707) at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) at org.seleniumhq.jetty9.servlet.ServletHolder.handle(ServletHolder.java:808) at org.seleniumhq.jetty9.servlet.ServletHandler.doHandle(ServletHandler.java:587) at org.seleniumhq.jetty9.server.session.SessionHandler.doHandle(SessionHandler.java:221) at org.seleniumhq.jetty9.server.handler.ContextHandler.doHandle(ContextHandler.java:1127) at org.seleniumhq.jetty9.servlet.ServletHandler.doScope(ServletHandler.java:515) at org.seleniumhq.jetty9.server.session.SessionHandler.doScope(SessionHandler.java:185) at org.seleniumhq.jetty9.server.handler.ContextHandler.doScope(ContextHandler.java:1061) at org.seleniumhq.jetty9.server.handler.ScopedHandler.handle(ScopedHandler.java:141) at org.seleniumhq.jetty9.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97) at org.seleniumhq.jetty9.server.Server.handle(Server.java:499) at org.seleniumhq.jetty9.server.HttpChannel.handle(HttpChannel.java:310) at org.seleniumhq.jetty9.server.HttpConnection.onFillable(HttpConnection.java:257) at org.seleniumhq.jetty9.io.AbstractConnection$2.run(AbstractConnection.java:540) at org.seleniumhq.jetty9.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635) at org.seleniumhq.jetty9.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555) at java.lang.Thread.run(Thread.java:745)