While deploying IDP on a Tomcat instance, I would then receive a 500 internal error response when I tried to access the shibboleth status page (e.g. http://localhost/idp/status)
The ISSUE
The main error response would be that there's no class definition found 'shibboleth java.lang.noclassdeffounderror javax/servlet/jsp/jstl/core/config'
Why?
The issue here is because you've downloaded a fresh version of Tomcat however Tomcat by default does not come with the Java Server Tag Library that is required for JSP page as Spring views. The Shibboleth JSP status page is built on a JSP file and therefore it's unable to render successfully.
The SOLUTION
You will need to download the missing Java Server Tag Library files and place them into the Tomcat lib directory
You can download these jar files from the two following URLs:
http://repo2.maven.org/maven2/javax/servlet/jstl/1.2/jstl-1.2.jar
http://repo1.maven.org/maven2/javax/servlet/jsp-api/2.0/jsp-api-2.0.jar
Once you've downloaded these files, place them into the lib directory. Restart the Tomcat services for the jar files to become in effect. Simply copy and paste into the lib directory as illustrated within the screenshot. The shibboleth status page should now be accessible. The other solution to this is to include the jar file within the pom.xml if you're compiling the CAS server from scratch though a quick fix, a copy and page would be sufficient
About the author
Daniel is a Technical Manager with over 10 years of consulting expertise in the Identity and Access Management space.Daniel has built from scratch this blog as well as technicalconfessions.com
Follow Daniel on twitter @nervouswiggles
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