WebSphere


Execute PortalServer/bin/WPVersionInfo.(bat|sh)

You will receive a WebSphere Portal Product Installation Status Report containing detailed information.

Use trace string: com.ibm.ws.security.*=all=enabled and maybe com.ibm.wsspi.wssecurity.*=finest

 SRVE0068E: Uncaught exception thrown in one of the service methods of the servlet: [your servlet here]. Exception thrown : java.lang.ClassCastException: com.ibm.wps.pe.pc.legacy.impl.PortletConfigImpl incompatible with javax.servlet.ServletContext

Find a solution here: http://www-01.ibm.com/support/docview.wss?uid=swg21316024


Hint: Enable the following trace String com.ibm.ws.security.*=all=enabled to get more information.

 

This error occurs during decoding LtpaToken which is a Base64 encoded byte stream. For my case the error occured because LptaToken was not a valid Base64 encoded byte stream, the last character was cut off.