UndertowSubsystemParser_5_0 could be instantiated twice: once as a reader and once as a writer ---------------------------------------------------------------------------------------------- Key: WFLY-9597 URL: https://issues.jboss.org/browse/WFLY-9597 Project: WildFly Issue Type: Bug Components: Web (Undertow) Reporter: Radoslav Husar Assignee: Tomaz Cerar The org.wildfly.extension.undertow.UndertowSubsystemParser_5_0#xmlDescription could be created twice, the first and last line in the diff should return the same instance or use different approach: https://github.com/rhusar/wildfly/blob/7dbc8bd0c8bcdae5db61ecdff1484a422c... Most likely the same issue is in multiple places.