Separate Selenium server hangs on startup
I have deployed a selenium standalone server on the new ubuntu 14.04 digital ocean. It fails to start correctly. Log of its provision
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 it is missing 2 lines in the log.
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 anyone have any idea why this is happening?
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This happens when selenium tries to generate a random seed, but there is no entropy in the core.
The solution is to install software that adds entropy, for example haveged
. See https://www.digitalocean.com/community/tutorials/how-to-setup-additional-entropy-for-cloud-servers-using-haveged
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If the same problem for RHEL 7 ... was also entropy
To check if you have one problem:
cat /proc/sys/kernel/random/entropy_avail
shows a really low number ... (I had 3)
To make it work:
yum install rng-tools
systemctl enable rngd.service
systemctl start rngd.service
Subsequently, the number increased to 3000, and the selenium server came up ...
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