[jboss-jira] [JBoss JIRA] (WFCORE-2997) Intermittent failures in JmxAuditLogFieldsOfLogTestCase

[Kabir Khan (JIRA)]

Kabir Khan created WFCORE-2997:
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             Summary: Intermittent failures in JmxAuditLogFieldsOfLogTestCase
                 Key: WFCORE-2997
                 URL: https://issues.jboss.org/browse/WFCORE-2997
             Project: WildFly Core
          Issue Type: Bug
            Reporter: Kabir Khan


This test fails due to an extra entry now and again for calls to unregisterMBean for ObjectNames of the type "jboss.modules:type=ModuleLoader,name=ServiceModuleLoader-nnn". 

{code}
java.lang.AssertionError: [{    "type" => "jmx",    "r/o" => false,    "booting" => false,    "version" => "3.0.0.Beta27-SNAPSHOT",    "user" => "anonymous",    "domainUUID" => undefined,    "access" => undefined,    "remote-address" => undefined,    "method" => "unregisterMBean",    "sig" => ["javax.management.ObjectName"],    "params" => ["jboss.modules:type=ModuleLoader,name=ServiceModuleLoader-3"]}, {    "type" => "jmx",    "r/o" => true,    "booting" => false,    "version" => "3.0.0.Beta27-SNAPSHOT",    "user" => "IAmAdmin",    "domainUUID" => undefined,    "access" => "JMX",    "remote-address" => "/0:0:0:0:0:0:0:1",    "method" => "queryMBeans",    "sig" => [        "javax.management.ObjectName",        "javax.management.QueryExp"    ],    "params" => [        "java.lang:*",        undefined    ]}] expected:<1> but was:<2>    at org.junit.Assert.fail(Assert.java:88)    at org.junit.Assert.failNotEquals(Assert.java:834)    at org.junit.Assert.assertEquals(Assert.java:645)    at org.jboss.as.test.manualmode.auditlog.AbstractLogFieldsOfLogTestCase.readFile(AbstractLogFieldsOfLogTestCase.java:144)    at org.jboss.as.test.manualmode.auditlog.JmxAuditLogFieldsOfLogTestCase.testJmxAuditLoggingFields(JmxAuditLogFieldsOfLogTestCase.java:60)
{code}

When the ServiceLoaders are created, these XMBeans are registered and hold a WeakReference to the ServiceLoader, The WeakReference has a reference queue which triggers a Reaper in ModuleLoader. This Reaper is then run when the weak reference is cleared, and results in the call to unregister the mbean which is then logged in the audit log. 

When this happens in not-deterministic and can happen at any time, so the test should strip out these .



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