[jboss-jira] [JBoss JIRA] (WFCORE-1039) Intermittent failure in notification listener testing in org.jboss.as.jmx.rbac.JmxRbacEnabledTestCase

Intermittent failure in notification listener testing in org.jboss.as.jmx.rbac.JmxRbacEnabledTestCase ----------------------------------------------------------------------------------------------------- Key: WFCORE-1039 URL: https://issues.jboss.org/browse/WFCORE-1039 Project: WildFly Core Issue Type: Bug Components: JMX, Test Suite Affects Versions: 2.0.0.CR6 Reporter: Brian Stansberry Assignee: Brian Stansberry Fix For: 2.0.0.CR7 For a while we've seen rare failures of that look like this: {code} java.lang.RuntimeException: java.security.PrivilegedActionException: javax.management.ListenerNotFoundException: Unknown listener at org.jboss.as.jmx.rbac.JmxRbacTestCase.checkMBeanAccess(JmxRbacTestCase.java:484) at org.jboss.as.jmx.rbac.JmxRbacTestCase.testMonitorNonSensitiveMBeans(JmxRbacTestCase.java:219) ... Caused by: java.security.PrivilegedActionException: null at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:422) at org.jboss.as.jmx.rbac.JmxRbacTestCase.checkMBeanAccess(JmxRbacTestCase.java:254) at org.jboss.as.jmx.rbac.JmxRbacTestCase.testMonitorNonSensitiveMBeans(JmxRbacTestCase.java:219) ... Caused by: javax.management.ListenerNotFoundException: Unknown listener at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.removeNotificationListener(DefaultMBeanServerInterceptor.java:1339) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.removeNotificationListener(DefaultMBeanServerInterceptor.java:1242) at com.sun.jmx.mbeanserver.JmxMBeanServer.removeNotificationListener(JmxMBeanServer.java:870) at org.jboss.as.jmx.PluggableMBeanServerImpl$TcclMBeanServer.removeNotificationListener(PluggableMBeanServerImpl.java:1544) at org.jboss.as.jmx.PluggableMBeanServerImpl.removeNotificationListener(PluggableMBeanServerImpl.java:969) at org.jboss.as.jmx.rbac.JmxRbacTestCase$1.run(JmxRbacTestCase.java:368) at org.jboss.as.jmx.rbac.JmxRbacTestCase$1.run(JmxRbacTestCase.java:254) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:422) at org.jboss.as.jmx.rbac.JmxRbacTestCase.checkMBeanAccess(JmxRbacTestCase.java:254) at org.jboss.as.jmx.rbac.JmxRbacTestCase.testMonitorNonSensitiveMBeans(JmxRbacTestCase.java:219) {code} The problem is the TestModelMBean used by the test is not holding a ref to the "listenerWrapper" that the JVM MBeanServer passes into its addNotificationListener method. That allows that listenerWrapper to be gc'd, resulting in the failure of the removeNotificationListener call on the next line of the test. The test holding a ref to the listener doesn't matter, as it's a "listenerWrapper" object that matters.