Most CWSCJ0371W warning messages are harmless. The majority of these messages are logged as a result of an expired LTPAToken which are cached in browsers. By default, the LTPA token will timeout after 2 hours.
An example of the warning message:
[23/6/16 11:14:24:482 SGT] 000001ba LTPAServerObj W CWSCJ0371W: Validation of the LTPA token failed because the token expired with the following info: Token expiration Date: Wed Jun 22 19:26:00 SGT 2016, current Date: Thu Jun 23 11:14:2 4 SGT 2016 Token attributes: port=xxx, username=user:xxx/xxx.. This warning might indicate expected behavior. Please refer to technote at http://www-01.ibm.com/support/docview.wss?uid=swg21594981.
How to resolve the problem?
As advised by IBM, you may either ignore these warning messages or suppress them by adding “com.ibm.ws.security.ltpa.LTPAServerObject=severe” in IBM Console (Troubleshooting > Logs and trace > <server> > Diagnostic Trace > Change log detail levels).