JSF IdMapper can create repeated ids in clustered environments causing: IllegalStateException with postback ----------------------------------------------------------------------------------------------------------- Key: WFLY-13252 URL: https://issues.redhat.com/browse/WFLY-13252 Project: WildFly Issue Type: Bug Components: JSF Affects Versions: 19.0.0.Beta3 Reporter: Ricardo Martin Camarero Assignee: Ricardo Martin Camarero Priority: Major Labels: downstream_dependency Fix For: 20.0.0.Beta1 In the round-robin load-balancing environment, IllegalStateException occurs with postback action. This issue seems to occur notably when set javax.faces.PARTIAL_STATE_SAVING=false.