jenkins版本: 1.598
selenium版本: 1.42.2
firefox版本: 2.7
系统: windows2008 and windows2003

webtest.py

 from selenium import webdriver

class Webtest(unittest.TestCase):
    def setUp(self):
        self.driver = webdriver.Firefox()
    ...

我在windows的cmd里面执行 "python webtest.py"，毫无问题，浏览器正常打开，测试结果也正常。

 d:\python webtest.py
.
--------------------------------------------------
Ran 1 test in 42.978s
OK

但如果是在jenkins里，选择 "execute windows batch command"，配置 "python webtest.py"跑测试，这时候就会有问题，firefox浏览器并不会打开，但是后台有进程，webtest会在后台运行，但运行起来总是会有点问题，例如

 File "C:\Python27\lib\site-packages\selenium-2.42.1-py2.7.egg\selenium\webdriver\remote\webelement.py", line 370, in _execute
return self._parent.execute(command, params)
File "C:\Python27\lib\site-packages\selenium-2.42.1-py2.7.egg\selenium\webdriver\remote\webdriver.py", line 173, in execute
self.error_handler.check_response(response)
File "C:\Python27\lib\site-packages\selenium-2.42.1-py2.7.egg\selenium\webdriver\remote\errorhandler.py", line 164, in check_response
raise exception_class(message, screen, stacktrace)
StaleElementReferenceException: Message: u'Element not found in the cache - perhaps the page has changed since it was looked up' ;
but，webtest.py in windows cmd executed is successed.

但webtest.py在cmd里直接执行是没有问题的。
所以不知道是什么问题？是版本问题还是什么？怎么才能让浏览器打开？