Why is selenium script throwing SERVER INERNAL ERROR while running from GRID?

[Poovaraj Thangamariappan]

Hi Team,

I have executed selenium script using Grid. Script is failed due to SERVER INERNAL ERROR message.  Please help me on this.

 

Selenium Version: 2.53

OS: MAC OS

Safari Brower version 9

 

 

Error Message :-

 

Returned value cannot be converted to WebElement: SERVER INTERNAL ERROR: Serve() returned a null response. Build info: version: '2.53.0', revision: '35ae25b1534ae328c771e0856c93e187490ca824', time: '2016-03-15 10:43:46' System info: host: 'TEST', ip: '101.17.12.197', os.name: 'Windows Server 2008 R2', os.arch: 'amd64', os.version: '6.1', java.version: '1.8.0_131' Driver info: driver.version: RemoteWebDriver Caused by: java.lang.ClassCastException: java.lang.String cannot be cast to org.openqa.selenium.WebElement

Regards

Poovaraj

 

[Krishnan Mahadevan]

You might want to try using the latest released version of Selenium [3.5.1].

I am not sure what is causing the ClassCastException because you haven’t shown us the code that you are working with.

 

Thanks & Regards

Krishnan Mahadevan

 

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[Poovaraj Thangamariappan]

Hi Team,

I am running script using GRID option and it is running iteration mode. Script was passed in first iteration and same script was failed in second iteration after launching browser. It is not entering username and password. Script is same for both iteration and data is different. Script was failing only GRID execution but same script is working in local system. Could you please help me how to fix below issue ?

Steps:

• Launch the browser
  
• Enter the User name and Password
  
• Click on Login button
  

Selenium Version: 2.53

OS: MAC OS

Safari Browser version 9 

Detailed Error Message :-

Aug 24, 2017 2:23:33 PM org.openqa.selenium.support.ui.ExpectedConditions findElement

WARNING: WebDriverException thrown by findElement(By.id: MainContent_LoginButton)

org.openqa.selenium.WebDriverException: Returned value cannot be converted to WebElement: SERVER INTERNAL ERROR: Serve() returned a null response.

Build info: version: '2.53.0', revision: '35ae25b1534ae328c771e0856c93e187490ca824', time: '2016-03-15 10:43:46'

System info: host: 'Testing', ip: '101.71.2.07', os.name: 'Windows Server 2008 R2', os.arch: 'amd64', os.version: '6.1', java.version: '1.8.0_131'

Driver info: driver.version: RemoteWebDriver

at org.openqa.selenium.remote.RemoteWebDriver.findElement(RemoteWebDriver.java:370)

at org.openqa.selenium.remote.RemoteWebDriver.findElementById(RemoteWebDriver.java:413)

at org.openqa.selenium.By$ById.findElement(By.java:218)

at org.openqa.selenium.remote.RemoteWebDriver.findElement(RemoteWebDriver.java:355)

at org.openqa.selenium.support.ui.ExpectedConditions.findElement(ExpectedConditions.java:899)

at org.openqa.selenium.support.ui.ExpectedConditions.access$000(ExpectedConditions.java:41)

at org.openqa.selenium.support.ui.ExpectedConditions$7.apply(ExpectedConditions.java:205)

at org.openqa.selenium.support.ui.ExpectedConditions$7.apply(ExpectedConditions.java:201)

at org.openqa.selenium.support.ui.ExpectedConditions$22.apply(ExpectedConditions.java:653)

at org.openqa.selenium.support.ui.ExpectedConditions$22.apply(ExpectedConditions.java:646)

at org.openqa.selenium.support.ui.FluentWait.until(FluentWait.java:238)

at businessComponents.GeneralComponents.invokeApplication(GeneralComponents.java:77)

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 com.test.Framework.DriverScript.invokeBusinessComponent(DriverScript.java:699)

at com.test.Framework.DriverScript.executeTestcase(DriverScript.java:642)

at com.test.Framework.DriverScript.executeFRAMEWORKTestIterations(DriverScript.java:589)

at com.test.Framework.DriverScript.executeFramework(DriverScript.java:156)

at com.test.Framework.DriverScript.driveTestExecution(DriverScript.java:149)

at runners.ParallelRunner.run(ParallelRunner.java:48)

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:748)

Caused by: java.lang.ClassCastException: java.lang.String cannot be cast to org.openqa.selenium.WebElement

at org.openqa.selenium.remote.RemoteWebDriver.findElement(RemoteWebDriver.java:368)

... 24 more

Regards,

Poovaraj