The WFLY-951enables the way to set the Narayana settings of the expiry class names via system property. The issue enforces users to use only property in form RecoveryEnvironmentBean.expiryScannerClassNames. But Narayana provides to use either this shortened version of the property for any configuration option. But it accepts the longer form for property with fully qualified bean class name (https://jbossts.blogspot.com/2018/01/narayana-periodic-recovery-of-xa.html#configuration). In this case it's com.arjuna.ats.arjuna.common.RecoveryEnvironmentBean.expiryScannerClassNames. That property (which sets the same thing as its shortened version) should be accepted by the WFLY as well.