Hi Rajkiran
I believe that the above reply does not answer your question. You are asking about Tomcat 8, and Vijay's reply was for Red Hat Linux 8.
Are you asking whether the SSO Federation Web Services can be deployed on Tomcat 8 so that SSO can act as the IDP?
Or are you asking whether SSO can federate with some application on Tomcat where SSO is the IDP and Tomcat is the SP?
If you are asking the first question, then you need to look up the platform support matrix (PSM) for whatever version of SSO that you are using for your web agent and web agent option pack (note that r12.7 is a release of the Policy Server and Access Gateway only). See the product documentation for details on how to find your PSM. If you are using SSO r12.52 and a 64-bit web agent, then section 4.2 of the PSM states that Tomcat 8 is supported for the Web Agent Option Pack only on RHEL 6 or 7. There is no 32-bit support for Tomcat 8.
However, in general CA recommends using the CA Access Gateway (formerly known as Secure Proxy Server) to host the Federation Web Services. It's easier than trying to deploy them on one of the other application servers.
If you are asking the second question, then federation should work fine as long as Tomcat 8 is supporting standard federation protocols.
Pearse