selenium - Unable to bind to locking port 7054 within 45000 ms

Question

While running automation in webdriver standalone server, i get this exception randomly. Once it comes, I killed all java process . So what is the solution for this exception ? Why it comes randomly ?

Unfortunately as far as i know, all have suggested to use latest version of selenium jar or come compatible firefox version depending on the selenium version or they have said to check if that port is on use (though it won't!) or reboot system.Few have suggested to uninstall firefox version and reinstall it. Any permanent solution or any idea why it comes?

org.openqa.selenium.WebDriverException: Unable to bind to locking port 7054 within 45000 ms 
Build info: version: '2.30.0', revision: 'dc1ef9c', time: '2013-02-19 00:15:27' 
System info: os.name: 'Windows 7', os.arch: 'x86', os.version: '6.1', java.version: '1.7.0' 
Driver info: driver.version: FirefoxDriver 
Command duration or timeout: 47.94 seconds 
Build info: version: '2.28.0', revision: '18309', time: '2012-12-11 15:53:30' 
System info: os.name: 'Windows 7', os.arch: 'x86', os.version: '6.1', java.version: '1.7.0' 
Driver info: org.openqa.selenium.remote.RemoteWebDriver

Answer 1

Seems like previous webDriver instance (or something else) didn't release the port. Here is workaround (bad practice) for this problem (Java):

 public static FirefoxBrowser forceInit() {
        try {
            return new FirefoxBrowser();
        } catch (WebDriverException exc) {
            return forceInit();
        }
    }

Make sure your tests close driver correctly by:

   driver.quit();