ee8.preview.mode property is racy --------------------------------- Key: WFLY-10134 URL: https://issues.jboss.org/browse/WFLY-10134 Project: WildFly Issue Type: Bug Components: EE Reporter: David Lloyd Priority: Critical The {{ee8-temp}} tests set the {{ee8.preview.mode}} property in the server management model, relying on system properties to get parsed and set before extensions which use Java EE 8 APIs are loaded. This assumption appears to be invalid. System properties are installed by the boot controller thread, and extensions are loaded in server service threads. In testing with the latest jboss-modules, I've observed cases where the controller thread does not add system properties until after some extension loading has happened in the server service threads. I haven't untangled why this happens only with the most recent jboss-modules in play, but the race exists regardless. Setting the {{ee8.preview.mode}} in {{arquillian.xml}} appears to work around the issue.