[jboss-jira] [JBoss JIRA] (AS7-4441) JPA hibernate.cache.region_prefix property fails JConsole to connect to JBoss

[Scott Marlow (JIRA)]

    [ https://issues.jboss.org/browse/AS7-4441?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12682741#comment-12682741 ] 

Scott Marlow commented on AS7-4441:
-----------------------------------

I deployed a simple jar with the second level cache enabled (and hibernate.cache.region_prefix set to '').  After deploying the app, I see an error in the AS7 console http://pastie.org/3762616

The same code is reached when attaching jconsole to AS7, so its probably the same issue.  Although, i didn't get the same error as show in the jira description.

I'll submit a pull request to address the NPE.  After the change is merged in, you can get the [nightly build to test |http://community.jboss.org/thread/167590] to verify the fix.
                
> JPA hibernate.cache.region_prefix property fails JConsole to connect to JBoss
> -----------------------------------------------------------------------------
>
>                 Key: AS7-4441
>                 URL: https://issues.jboss.org/browse/AS7-4441
>             Project: Application Server 7
>          Issue Type: Bug
>          Components: JMX, JPA / Hibernate, Server
>    Affects Versions: 7.1.1.Final
>         Environment: Windows Vista 64 bit, JDK 1.6.0_18
>            Reporter: Osten Forshed
>            Assignee: Scott Marlow
>            Priority: Minor
>
> If a web app is deployed (standalone) with a persistence.xml containing:
> <property name="hibernate.cache.region_prefix" value=""/>
> Then it is not possible to connect to the MBean Server with JConsole using instructions here:
> https://community.jboss.org/wiki/UsingJconsoleToConnectToJMXOnAS7
> Following stack trace is written to JBoss log:
> 12:27:03,406 WARN  [org.jboss.remotingjmx.protocol.v1.ServerProxy] (pool-5-thread-16) 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.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.queryNames(ModelControllerMBeanHelper.java:136)
>         at org.jboss.as.jmx.model.ModelControllerMBeanServerPlugin.queryNames(ModelControllerMBeanServerPlugin.java:124)
>         at org.jboss.as.jmx.PluggableMBeanServerImpl.queryNames(PluggableMBeanServerImpl.java:280)
>         at org.jboss.remotingjmx.protocol.v1.ServerProxy$QueryNamesHandler.handle(ServerProxy.java:1197)
>         at org.jboss.remotingjmx.protocol.v1.ServerProxy$MessageReciever$1.run(ServerProxy.java:215)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [rt.jar:1.6.0_18]
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [rt.jar:1.6.0_18]
>         at java.lang.Thread.run(Thread.java:619) [rt.jar:1.6.0_18]
> If property is removed from persistence.xml it is possible to connect using JConsole and browse the MBeans.

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