Selenium stand alone server hang while starting

Question

I deployed the selenium standalone server on new digital ocean ubuntu 14.04 server. Its not able to start properly. The log its giving is

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] 

I guess 2 lines are missing in the log it.

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

Does anybody have any idea why its happening??

Answer 1

It happens when selenium tries to generate a random seed, but the kernel lacks entropy.

The solution is to install software that adds entropy like haveged. See https://www.digitalocean.com/community/tutorials/how-to-setup-additional-entropy-for-cloud-servers-using-haveged