Selenium 独立服务器在启动时挂起

Question

我在新的 digital ocean ubuntu 14.04 服务器上部署了 selenium 独立服务器。它无法正常启动。它给出的日志是

13:33:57.853 INFO - Launching a standalone server
13:33:57.929 INFO - Java: Oracle Corporation 25.25-b02
13:33:57.930 INFO - OS: Linux 3.13.0-37-generic amd64
13:33:57.950 INFO - v2.44.0, with Core v2.44.0. Built from revision 76d78cf
13:33:58.060 INFO - Default driver org.openqa.selenium.ie.InternetExplorerDriver registration is skipped: registration capabilities Capabilities [{ensureCleanSession=true, browserName=internet explorer, version=, platform=WINDOWS}] does not match with current platform: LINUX
13:33:58.191 INFO - RemoteWebDriver instances should connect to: http://127.0.0.1:4444/wd/hub
13:33:58.196 INFO - Version Jetty/5.1.x
13:33:58.199 INFO - Started HttpContext[/selenium-server,/selenium-server] 

我猜日志中缺少 2 行。

14:54:06.454 INFO - Started SocketListener on 0.0.0.0:4444
14:54:06.462 INFO - Started org.openqa.jetty.jetty.Server@b1bc7ed

有人知道为什么会发生吗？

Answer 1

当 selenium 尝试生成随机种子，但内核缺乏熵时，就会发生这种情况。

解决方案是安装可以添加熵的软件，例如 haveged。请参阅https://www.digitalocean.com/community/tutorials/how-to-setup-additional-entropy-for-cloud-servers-using-haveged