title: Selenium webdriver "Error communicating with remote browser. It may have died" when I run test in parralel
body: <p>I am working on client side. I have created around 150 test scripts. But during execution, after some script execution, Selenium throws below error and it close the browser. Time is not a fix for this error. It comes when I am executing all the test scripts together in parallel. </p>
  
  <p>The error shows on Google Chrome and Firefox browsers. I am using <em>selenium-server-standalone-2.26.0.jar</em> file and doing execution on FF 13.0.1 version. I have also tried with FF version 14, but I get the same error. My client is not happy with this error because we dont have workaround for this issue.</p>
  
  <pre><code>  **Error message:**
  Caused by: org.openqa.selenium.remote.ErrorHandler$UnknownServerException: Error communicating with the remote browser. It may have died
  </code></pre>