The default-security-domain attribute in the Undertow subsystem should not support expressions. ----------------------------------------------------------------------------------------------- Key: WFLY-7822 URL: https://issues.jboss.org/browse/WFLY-7822 Project: WildFly Issue Type: Bug Components: Web (Undertow) Reporter: Darran Lofthouse Assignee: Stuart Douglas Fix For: 12.0.0.Final This attribute may be deprecated and removed at some point when we start to transition off PicketBox but for now it leads to a service dependency being set based on the value so should not support expressions.