title: Unable to connect to host 127.0.0.1 on port 7055 after 45000 ms. with FF version 26.0 and selenium standalone jar 2.39
body: <p>I am trying to connect to selenium 2.30 with FF version 26.0 installed in my AWS unix machine but I am getting below error when I start both my client which access selenium.</p>
  
  <p>Also, when I try the same with selenium standalone jar 2.38.0, it works fine but suddenely after some time in a day or two, it starts giving below error with 2.38.0 as well. Not sure why this is happening? Any idea??</p>
  
  <p>project is I have a multithreadin app wherein client keeps executing some threads which pings some URLS and all, it keeps on happening unless some issue like below occurs.</p>
  
  <pre><code>Caused by: org.openqa.selenium.remote.ErrorHandler$UnknownServerException: Unable to connect to host 127.0.0.1     on port 7055 after 45000 ms. Firefox console output:
  Error: no display specified
  Error: no display specified
  
  Build info: version: 'unknown', revision: 'unknown', time: 'unknown'
  System info: os.name: 'Linux', os.arch: 'amd64', os.version: '3.4.76-65.111.amzn1.x86_64', java.version:  '1.7.0_51'
   Driver info: driver.version: FirefoxDriver
      at      org.openqa.selenium.firefox.internal.NewProfileExtensionConnection.start(NewProfileExtensionConnection.java:118)
      at org.openqa.selenium.firefox.FirefoxDriver.startClient(FirefoxDriver.java:250)
      at org.openqa.selenium.remote.RemoteWebDriver.&lt;init&gt;(RemoteWebDriver.java:110)
      at org.openqa.selenium.firefox.FirefoxDriver.&lt;init&gt;(FirefoxDriver.java:197)
      at org.openqa.selenium.firefox.FirefoxDriver.&lt;init&gt;(FirefoxDriver.java:190)
      at org.openqa.selenium.firefox.FirefoxDriver.&lt;init&gt;(FirefoxDriver.java:108)
  </code></pre>