SLO exception
14.6.3. SLO exception in debug mode

Exception:

FedLib: SPSingleLogout: SPSingleLogout.processLogoutRequest (...) com.sun.identity.plugin.session.Session

Exception:

Current sessionID (...) does not match requested sessionID (...)

Reason:

The SP has multiple stored sessions for the combination of IDP/SP/UserId triple. When processing a logout request from an IDP, it has to loop through all stored sessions to find the correct session and prints a stack trace (on DEBUG only) when looking at another session for the same IDP/SP/UserId triple.

Solution:

This message can be ignored.