Sever level MBean hasn't been initialized yet when a web app starts up, causing javax.management.InstanceNotFoundException -------------------------------------------------------------------------------------------------------------------------- Key: WFLY-3557 URL: https://issues.jboss.org/browse/WFLY-3557 Project: WildFly Issue Type: Bug Security Level: Public(Everyone can see) Components: Web (JBoss Web) Affects Versions: JBoss AS7 7.2.0.Final Reporter: Osamu Nagano Assignee: Remy Maucherat Attachments: module.xml, TestWAR.war, test_valve.jar With "-Dorg.apache.tomcat.util.ENABLE_MODELER=true", server level MBeans like a global valve become available. Those should be visible from start phase of a web app, though sometimes those are missing and javax.management.InstanceNotFoundException is thrown. This sporadically happens due to the parallel nature of WildFly start up. It is reproducible by using a debugger (Eclipse is better than JDB, because JDB stops all threads).