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

[Brian Stansberry (JIRA)]

Brian Stansberry created WFCORE-1039:
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             Summary: 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


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.



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