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Re: Issues with modular classloading
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created by <a href="http://community.jboss.org/people/bstansberry%40jboss.com">Brian Stansberry</a> in <i>JBoss AS7 Development</i> - <a href="http://community.jboss.org/message/565928#565928">View the full discussion</a>
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<div class="jive-rendered-content"><p>Another issue I'm seeing is deployment processor failures processing managed bean jars:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><blockquote class="jive-quote"><p>14:11:52,800 INFO  [stdout] @javax.annotation.Resource(shareable=true, mappedName=, description=, name=, type=class java.lang.Object, authenticationType=CONTAINER) null<br/>14:11:52,800 INFO  [stdout] interface javax.annotation.Resource ClassLoader for Module "module:javax.annotation.api:main"<br/>14:11:52,801 ERROR [deployment] Caught exception handling update (param is f91250dd-121a-4c01-9407-1c91cb53e5cd): java.lang.NullPointerException<br/>    at org.jboss.as.deployment.managedbean.processors.ManagedBeanAnnotationProcessor.processFieldResource(ManagedBeanAnnotationProcessor.java:295)<br/>    at org.jboss.as.deployment.managedbean.processors.ManagedBeanAnnotationProcessor.processResources(ManagedBeanAnnotationProcessor.java:261)<br/>    at org.jboss.as.deployment.managedbean.processors.ManagedBeanAnnotationProcessor.processDeployment(ManagedBeanAnnotationProcessor.java:125)<br/>    at org.jboss.as.deployment.chain.DeploymentChainImpl.processDeployment(DeploymentChainImpl.java:60)<br/>    at org.jboss.as.model.ServerDeploymentStartStopHandler.activate(ServerDeploymentStartStopHandler.java:191)<br/>    at org.jboss.as.model.ServerDeploymentStartStopHandler.deploy(ServerDeploymentStartStopHandler.java:87)<br/>    at org.jboss.as.model.ServerDeploymentStartStopHandler.deploy(ServerDeploymentStartStopHandler.java:71)<br/>    at org.jboss.as.model.ServerDeploymentStartStopHandler.redeploy(ServerDeploymentStartStopHandler.java:117)<br/>    at org.jboss.as.model.ServerModelDeploymentFullReplaceUpdate.applyUpdate(ServerModelDeploymentFullReplaceUpdate.java:75)<br/>    at org.jboss.as.server.mgmt.ServerUpdateController$ServerModelUpdateTuple.applyUpdate(ServerUpdateController.java:387)<br/>    at org.jboss.as.server.mgmt.ServerUpdateController$ServerModelUpdateTuple.access$200(ServerUpdateController.java:357)<br/>    at org.jboss.as.server.mgmt.ServerUpdateController.applyUpdates(ServerUpdateController.java:182)<br/>    at org.jboss.as.server.mgmt.ServerUpdateController.executeUpdates(ServerUpdateController.java:139)<br/>    at org.jboss.as.server.mgmt.deployment.ServerDeploymentManagerImpl$2.run(ServerDeploymentManagerImpl.java:218)<br/>    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [:1.6.0_20]<br/>    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [:1.6.0_20]<br/>    at java.lang.Thread.run(Thread.java:637) [:1.6.0_20]</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p></blockquote><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The NPE happens because a lookup in a Map<Class, Annotation> is unexpectedly returning null. It returns null because the Resource.class passed to the lookup is loaded from a different CL from the Resource.class that's a key in the map.  The first couple lines of logging above are some debug output I threw in; the first line shows the map key was loaded from the system CL while the param was loaded from a module.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I think the problem here is the javax.annotation.api module includes classes that are in the 'system' module.</p></div>
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