Service unavailable error on website

[Manish]

Hello,

One of our client was getting "Service Unavailable" error on website. Further checking it was generating below errors on the server.

INFO: validateJarFile(/home/username/public_html/WEB-INF/lib/selenium-server-standalone-2.52.0.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class

There was compatibility issue of selenium-server-standalone-2.52.0.jar with the Tomcat server as it is a standalone server.

In order to fix issue don't use the standalone selenium jar, instead use the small non-standalone selenium jar and also use all the jars it depends on.

Download the full zip from HERE
After that Open the zip and copy selenium-java-2.53.0.jar in WEB-INF/lib folder and restart the Tomcat service.

That's it. Now your website should work fine