Selenium UnreachableBrowserException - "Could not start a new session" in SoapUI Groovy TestStep

Question

I use SoapUI Pro 5.1.2 on Win7 x32, and try to connect to Selenium Webdriver in Groovy TestStep.

For this purpose I added selenium-standalone-server.jar v2.45.0 in $SOAP_HOME$\bin\ext folder.

My Groovy TestStep code:

import org.openqa.selenium.WebDriver
import org.openqa.selenium.chrome.ChromeDriver

System.setProperty('webdriver.chrome.driver', 'C:\\\\Windows\\system32\\chromedriver.exe')
log.info(System.getProperty('webdriver.chrome.driver')) //got 'C:\\Windows\system32\chromedriver.exe'

WebDriver driver = new ChromeDriver() // this line causes error

driver.get('http://google.com')
driver.quit()

When I try to run this step, SoapUI returns message:

org.openqa.selenium.remote.UnreachableBrowserException: 
Could not start a new session. 
Possible causes are invalid address of the remote server or browser start-up failure. 
Build info: 
    version: '2.45.0', 
    revision: '5017cb8', 
    time: '2015-02-26 23:59:50' 
System info: 
    host: 'SmithPC', 
    ip: '10.0.2.15', 
    os.name: 'Windows 7', 
    os.arch: 'x86', 
    os.version: '6.1', 
    java.version: '1.8.0_45' 
Driver info: 
    driver.version: ChromeDriver 
error at line: 7

I tried to run this piece of code through the Netbeans IDE, after adding the same selenium-standalone-server.jar package to empty java project. And it has completed without problems!

This is error-log of soapUI:

org.openqa.selenium.remote.UnreachableBrowserException: Could not start a new session. Possible causes are invalid address of the remote server or browser start-up failure.
Build info: version: '2.45.0', revision: '5017cb8', time: '2015-02-26 23:59:50'
System info: host: 'SmithPC', ip: '10.0.2.15', os.name: 'Windows 7', os.arch: 'x86', os.version: '6.1', java.version: '1.8.0_45'
Driver info: driver.version: ChromeDriver
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:593)
    at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:240)
    at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:126)
    at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:139)
    at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:171)
    at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:160)
    at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:117)
    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:422)
    at org.codehaus.groovy.reflection.CachedConstructor.invoke(CachedConstructor.java:77)
    at org.codehaus.groovy.runtime.callsite.ConstructorSite$ConstructorSiteNoUnwrapNoCoerce.callConstructor(ConstructorSite.java:102)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallConstructor(CallSiteArray.java:57)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:182)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:186)
    at Script3.run(Script3.groovy:7)
    at com.eviware.soapui.support.scripting.groovy.SoapUIGroovyScriptEngine.run(SoapUIGroovyScriptEngine.java:92)
    at com.eviware.soapui.support.scripting.groovy.SoapUIProGroovyScriptEngineFactory$SoapUIProGroovyScriptEngine.run(SourceFile:79)
    at com.eviware.soapui.impl.wsdl.teststeps.WsdlGroovyScriptTestStep.run(WsdlGroovyScriptTestStep.java:138)
    at com.eviware.soapui.impl.wsdl.panels.teststeps.GroovyScriptStepDesktopPanel$RunAction$1.run(GroovyScriptStepDesktopPanel.java:250)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
    at org.apache.http.impl.conn.SystemDefaultRoutePlanner.determineProxy(SystemDefaultRoutePlanner.java:79)
    at org.apache.http.impl.conn.DefaultRoutePlanner.determineRoute(DefaultRoutePlanner.java:77)
    at org.apache.http.impl.client.InternalHttpClient.determineRoute(InternalHttpClient.java:124)
    at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:183)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:71)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:55)
    at org.openqa.selenium.remote.internal.ApacheHttpClient.fallBackExecute(ApacheHttpClient.java:126)
    at org.openqa.selenium.remote.internal.ApacheHttpClient.execute(ApacheHttpClient.java:72)
    at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:133)
    at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:66)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:572)
    ... 23 more

I also tried use FirefoxDriver() instead of ChromeDriver(), and got the same error.

Answer 1

In selenium this error message:

org.openqa.selenium.remote.UnreachableBrowserException: Could not start a new session. Possible causes are invalid address of the remote server or browser start-up failure.

Could have a lot of causes. However looking at the stacktrace in this case is due to a NullPointerException:

Caused by: java.lang.NullPointerException
    at org.apache.http.impl.conn.SystemDefaultRoutePlanner.determineProxy(SystemDefaultRoutePlanner.java:79)
    at org.apache.http.impl.conn.DefaultRoutePlanner.determineRoute(DefaultRoutePlanner.java:77)
    at org.apache.http.impl.client.InternalHttpClient.determineRoute(InternalHttpClient.java:124)

The problem is that you're using selenium inside SOAPUI. SOAPUI seems to set the default proxy to null (ProxySelector.setDefault(null)). So when selenium gets the default proxy an invoke a method on it, a NullPointerException is thrown.

The problem is that you executes your code inside SOAPUI so you can not get the default proxy before SOAPUI set it to null... then a possible workaround is in your Groovy testStep try to create a ProxySelector an set it as default before WebDriver is executed:

import org.openqa.selenium.WebDriver
import org.openqa.selenium.chrome.ChromeDriver
import java.net.Proxy
import java.net.ProxySelector

def selectDirectProxy(URI uri) {
  final List<Proxy> proxy = new ArrayList<Proxy>()
  proxy.add(Proxy.NO_PROXY)
  return proxy
}

// create a ProxySelector
ProxySelector proxySelector = [ select : { uri->selectDirectProxy(uri) } ] as ProxySelector
// set as default to avoid null pointer
ProxySelector.setDefault(proxySelector);

// now it's safe to invoke WebDriver...
System.setProperty('webdriver.chrome.driver', 'C:\\\\Windows\\system32\\chromedriver.exe')
log.info(System.getProperty('webdriver.chrome.driver')) //got 'C:\\Windows\system32\chromedriver.exe'

WebDriver driver = new ChromeDriver()

In this example I extend the ProxySelector abstract class in a groovy way, to set at least one direct proxy. If its necessary it's also possible to use the Proxy class to configure a no direct proxy and set it in the list, but with this code I'm trying to avoid the NPE due to SOAPUI ProxySelector.setDefault(null).