[jboss-jira] [JBoss JIRA] (WFLY-73) NPE in RootResourceIterator

[RH Bugzilla Integration (JIRA)]

    [ https://issues.jboss.org/browse/WFLY-73?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13038571#comment-13038571 ] 

RH Bugzilla Integration commented on WFLY-73:
---------------------------------------------

Paul Gier <pgier at redhat.com> changed the Status of [bug 1185118|https://bugzilla.redhat.com/show_bug.cgi?id=1185118] from MODIFIED to ON_QA

> NPE in RootResourceIterator
> ---------------------------
>
>                 Key: WFLY-73
>                 URL: https://issues.jboss.org/browse/WFLY-73
>             Project: WildFly
>          Issue Type: Bug
>          Components: Domain Management, JMX
>            Reporter: Brian Stansberry
>            Assignee: Brian Stansberry
>             Fix For: 8.0.0.Alpha1
>
>
> Intermittent testsuite failures, e.g.
> http://lightning.mw.lab.eng.bos.redhat.com/jenkins/job/as7-param-pull/6845/testReport/junit/org.jboss.as.test.integration.osgi.deployment/BundleUninstallTestCase/testActiveJarUninstall/
> Log shows this repeatedly:
> &#27;[0m&#27;[33m18:38:11,612 WARN  [org.jboss.remotingjmx.protocol.v2.ServerCommon] (pool-2-thread-12) Unexpected internal error: java.lang.NullPointerException
>     at org.jboss.as.jmx.model.RootResourceIterator.doIterate(RootResourceIterator.java:49)
>     at org.jboss.as.jmx.model.RootResourceIterator.doIterate(RootResourceIterator.java:55)
>     at org.jboss.as.jmx.model.RootResourceIterator.doIterate(RootResourceIterator.java:55)
>     at org.jboss.as.jmx.model.RootResourceIterator.iterate(RootResourceIterator.java:39)
>     at org.jboss.as.jmx.model.ModelControllerMBeanHelper.getMBeanCount(ModelControllerMBeanHelper.java:103)
>     at org.jboss.as.jmx.model.ModelControllerMBeanServerPlugin.getMBeanCount(ModelControllerMBeanServerPlugin.java:116)
>     at org.jboss.as.jmx.PluggableMBeanServerImpl.getMBeanCount(PluggableMBeanServerImpl.java:220)
>     at org.jboss.remotingjmx.protocol.v2.ServerProxy$GetMBeanCountHandler.handle(ServerProxy.java:618)
>     at org.jboss.remotingjmx.protocol.v2.ServerCommon$MessageReciever$1.run(ServerCommon.java:152)
>     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_13]
>     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_13]
>     at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_13]
> RootResourceIterator.doIterate is reading the resource twice:
> {code}
>                   for (ResourceEntry entry : current.getChildren(type)) {
>                         final PathElement pathElement = entry.getPathElement();
>                         final Resource child = current.getChild(pathElement); //  why this call since "entry" and "child" should be the same object
>                         final PathAddress childAddress = address.append(pathElement);
>                         doIterate(child, childAddress);
>                     }
> {code}
> The problem is "child" is null, which is possible with a dynamic resource. So, either "entry" should be used, or, if there is some reason for the 2nd read, a check for null is needed before the recursive doIterate call.



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