DistributableSession validate method throw misleading exception message ----------------------------------------------------------------------- Key: WFLY-6808 URL: https://issues.jboss.org/browse/WFLY-6808 Project: WildFly Issue Type: Enhancement Components: Clustering Affects Versions: 10.0.0.Final Reporter: Mathieu Lachance Assignee: Paul Ferraro Fix For: 10.1.0.Final, 11.0.0.Alpha1 In DistributableSession the validate method is getting called for any underlying undertow session access to make sure we are not touching an already invalidated session (which totally make sense): {code} public class DistributableSession implements io.undertow.server.session.Session { private static void validate(Session<LocalSessionContext> session) { if (!session.isValid()) { throw UndertowMessages.MESSAGES.sessionNotFound(session.getId()); } } } {code} The problem though is the exception message that is thrown is really misleading because in reality the session actually exists but is currently invalid and/or getting invalidated. This can happen especially when running in optimistic mode where we can have many differents threads accessing the very same session. I would recommend we do instead: {code} if (!session.isValid()) { throw UndertowMessages.MESSAGES.sessionAlreadyInvalidated(); } {code} or even better: {code} if (!session.isValid()) { throw UndertowMessages.MESSAGES.sessionAlreadyInvalidated(session.getId()); } {code} but it will require also a change in Undertow to actually template/parametize the sessionAlreadyInvalidated message. Thanks,