How to see HTTP session content using PSI Probe?

You could use PSI Probe.

Drop probe.war into the webapps folder of your Tomcat, open the probe context in the browser (f.e. localhost:8080/probe) and at “Applications|/MYCONTEXT|Sessions|/SESSIONIDXYZ” you can see the session content of session SESSIONIDXYZ of the context MYCONTEXT.

psiprobe