Selenium remoteWebDriver : connection to selenium-standalone-server fail (driver version unknown)

Question

I received an exception after trying to setup a connection to selenium-server-standalone by using remoteWebDriver in an application test written in Java.

The issue is related the usage of remoteWebDriver starting selenium-server-standalone (with Xvfb) by using maven (because by running manually by a different session Xvfb and then selenium-server stand alone the application test is working). The environment is composed by RH Linux R4.1.x , Selenium 2.1, firefox 3.6. Both selenium-server-standalone and application test are executed on the same machine (Virtual Machine).

As previously said, the application test run successfully connecting to the instance of selenium-server-standalone-2.21.0 if this instance is started by a separate PUTTY session (separate from the one used for starting the application test) with the following commands:

#Xvfb :20 &

#export DISPLAY=:20

#Java –Dwebdriver.firefox.firefox=“/opt/firefox/firefox”  –jar selenium-server-standalone-2-.21.0.jar  -port 4441.

The application test code for connecting to selenium-server-standalone is the following :

DesiredCapabilities capability = DesiredCapabilities.firefox();

capability.setPlatform(Platform.LINUX);

WebDriver driver = new RemoteWebDriver (new URL("http://127.0.0.1:14444/wd/hub"),capability);

driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);

Now trying to use maven for starting also xvfb and selenium-server-stand alone before starting the application test I get the following error (then within same putty session):

selenium server conenction string: http://127.0.0.1:14444/wd/hub

brand community file name orig :/opt/optism_svn/trunk/ITests/Projects/core/bbCampaigns/BrandCommunitiesWD/src/test/resources/Orig_BrandCommunity_Test6386.csv

before connecting to web driver

15:17:05.591 INFO - Executing: [new session: {platform=LINUX, browserName=firefox, version=}] at URL: /session)

15:17:05.651 WARN - Exception thrown

java.util.concurrent.ExecutionException: org.openqa.selenium.WebDriverException: java.lang.reflect.InvocationTargetException

Build info: version: '2.2.1', revision: '16551', time: '2012-04-11 21:42:35'

System info: os.name: 'Linux', os.arch: 'amd64', os.version: '2.6.18-194.el5', java.version: '1.6.0_22'

Driver info: driver.version: unknown

        at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222)

        at java.util.concurrent.FutureTask.get(FutureTask.java:83)

        at org.openqa.selenium.remote.server.DefaultSession.execute(DefaultSession.java:158)

        at org.openqa.selenium.remote.server.DefaultSession.<init>(DefaultSession.java:112 )

        at org.openqa.selenium.remote.server.DefaultSession.createSession(DefaultSession.java:89)

        at org.openqa.selenium.remote.server.DefaultDriverSessions.newSession(DefaultDriverSessions.java:92)

        at org.openqa.selenium.remote.server.handler.NewSession.handle(NewSession.java:62)

        at org.openqa.selenium.remote.server.rest.ResultConfig.handle(ResultConfig.java:202)

        at org.openqa.selenium.remote.server.DriverServlet.handleRequest(DriverServlet.java:597)

        at org.openqa.selenium.remote.server.DriverServlet.doPost(DriverServlet.java:548)

        at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)

        at org.openqa.selenium.remote.server.DriverServlet.service(DriverServlet.java:520)

        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: org.openqa.selenium.WebDriverException: java.lang.reflect.InvocationTargetException

Build info: version: '2.2.1', revision: '16551', time: '2012-04-11 21:42:35'

System info: os.name: 'Linux', os.arch: 'amd64', os.version: '2.6.18-194.el5', java.version: '1.6.0_22'

**Driver info: driver.version: unknown**

        at org.openqa.selenium.remote.server.DefaultDriverFactory.callConstructor(DefaultDriverFactory.java:68)

        at org.openqa.selenium.remote.server.DefaultDriverFactory.newInstance(DefaultDriverFactory.java:52)

        at org.openqa.selenium.remote.server.DefaultSession$BrowserCreator.call(DefaultSession.java:197)

        at org.openqa.selenium.remote.server.DefaultSession$BrowserCreator.call(DefaultSession.java:184)

        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)

        at java.util.concurrent.FutureTask.run(FutureTask.java:138)

        at org.openqa.selenium.remote.server.DefaultSession$1.run(DefaultSession.java:151)

        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)

        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)

        at java.lang.Thread.run(Thread.java:662)

Caused by: java.lang.reflect.InvocationTargetException

        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)

        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)

        at java.lang.reflect.Constructor.newInstance(Constructor.java:513)

        at org.openqa.selenium.remote.server.DefaultDriverFactory.callConstructor(DefaultDriverFactory.java:58)

        ... 9 more

**Caused by: java.lang.IllegalStateException: The path to the chromedriver executable must be set by the webdriver.chrome.driver system property**

        at com.google.common.base.Preconditions.checkState(Preconditions.java:172)

        at org.openqa.selenium.chrome.ChromeDriverService.createDefaultService(ChromeDriverService.java:90)

        at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:107)

        ... 14 more

**15:17:05.659 WARN - Exception: The path to the chromedriver executable must be set by the  webdriver.chrome.driver system property**

The pom.xml used for starting xvfb and selenium server is the following one (extract of part related xvfb and selenium) :

<properties>

    <!-- Dependencies -->

    <selenium-version>2.21.0</selenium-version>

<selenium-plugin-version>2.3</selenium-plugin-version>

<dependency>

<groupId>org.seleniumhq.selenium</groupId>

<artifactId>selenium-java</artifactId>

<version>${selenium-version}</version>

</dependency>

.....

<plugin>

<groupId>org.codehaus.mojo</groupId>

<artifactId>selenium-maven-plugin</artifactId>

<version>${selenium-plugin-version}</version>

<configuration>

<background>true</background>

<port>14444</port>

</configuration>

<executions>

<execution>

<id>xvfb</id>

<phase>pre-integration-test</phase>

<goals>

<goal>xvfb</goal>

</goals>

….                      

<execution>

<id>start-selenium-server</id>

<phase>pre-integration-test</phase>

<goals>

<goal>start-server</goal>

</goals>

</execution>

Answer 1

I had the same error :

 

Exception: The path to the chromedriver executable must be set by the  webdriver.chrome.driver system property**

I solved it by adding the chromedriver.exe in the path of the node machine. Get the chrome driver from here(https://sites.google.com/a/chromium.org/chromedriver/). But it's weird to have this problem if you try to launch firefox.

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