在本地计算机上使用硒网格运行并行测试时，webdriver返回与浏览器的通信错误

Question

I'm running tests on local machine on Mac OS Python 2.7.5

Selenium hub:

java -jar ~/Downloads/selenium-server-standalone-2.42.2.jar -role hub

Selenium node:

java -jar ~/Downloads/selenium-server-standalone-2.42.2.jar -Dwebdriver.chrome.driver=/usr/local/bin/chromedriver -role node http://127.0.0.1:4444/grid/register

chromedriver is:

ChromeDriver 2.10.267517

I'm using behave framework and open new instance of chrome driver before each scenarion and use quit method avery after scenario hook.

When i'm running tests one by one a have no problems.

When i running tests in parallel on firefox driver everything is fine but with crome i have unexpected behavior.

When first step in number of parallel tests on one node is over all other steps crashed with:

WebDriverException: Message: u"Error communicating with the remote browser. It may have died.\\nBuild info: version: '2.42.2', revision: '6a6995d', time: '2014-06-03 17:42:03'\\nSystem info: host: 'point', ip: '127.0.0.1', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.9.2', java.version: '1.7.0_51'\\nDriver info: driver.version: EventFiringWebDriver" ; Stacktrace:

On selenium grid console i see that first selenium session is closed but all others are present.

I'm sure that i have only one instance of driver per test. i run tests parallel with multiprocessing module support:

for n in range(N):
    p = multiprocessing.Process(target=worker_wrapper, args=(compiled_cmd,))
    jobs.append(p)
    p.start()
    time.sleep(3)

for j in jobs:
    j.join()
    if j.exitcode != 0:
        sys.exit(1)

I appreciate any advice on my problem.

Answer 1

Sounds as if your driver is being stored a static or some such global variable.

Posting your initialization code may show the issue

Answer 2

通过在Linux平台（Ubuntu）上移动解决了问题。