使用 docker selenium Hub + Node 的方式运行测试用例，遇到报错：
raise exception_class(message, screen, stacktrace) selenium.common.exceptions.WebDriverException: Message: unknown error: unable to discover open pages (Driver info: chromedriver=2.33.506092 (733a02544d189eeb751fe0d7ddca79a0ee28cce4),platform=Linux 5.10.76-linuxkit x86_64) (WARNING: The server did not provide any stacktrace information) Command duration or timeout: 60.41 seconds Build info: version: '3.7.1', revision: '8a0099a', time: '2017-11-06T21:07:36.161Z' System info: host: 'c8dee7c5d345', ip: '172.17.0.3', os.name: 'Linux', os.arch: 'amd64', os.version: '5.10.76-linuxkit', java.version: '1.8.0_151' Driver info: driver.version: unknown
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