Resolving as Won't fix since TicketMonster 2.6.x is incompatible with WildFly 8.1 and above. TicketMonster is currently meant to be deployed against EAP 6.x. Read on, for more info on how to make this work in WildFly 8.1+.

As for WildFly 8.1 and above, look at the WFLY8.1 branch on github: https://github.com/jboss-developer/ticket-monster/tree/WFLY8.1
The reason for having a separate branch for WildFly 8.1 is because Jackson 2 is now the serializer used OOTB by RestEasy, and thus, the Jackson 1 annotations used by TicketMonster should be updated to the Jackson 2 equivalents. This change is incompatible with EAP 6.x, and thus resides in a separate branch.