[jboss-user] NoClassDefFoundError when class is in JBoss AS7 WAR WEB-INF/classes folder

I'm using JBoss AS7. I get a ClassNotFoundException when attempting to deploy my app - looks like it's not finding JMSException 09:54:53,166 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-7) MSC00001: Failed to start service jboss.deployment.unit."myapp-maventest.war".INSTALL: org.jboss.msc.service.StartException in service jboss.deployment.unit."myapp-maventest.war".INSTALL: Failed to process phase INSTALL of deployment "myapp-maventest.war" at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:121) at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1765) at org.jboss.msc.service.ServiceControllerImpl$ClearTCCLTask.run(ServiceControllerImpl.java:2291) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [:1.6.0_26] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [:1.6.0_26] at java.lang.Thread.run(Thread.java:680) [:1.6.0_26] Caused by: java.lang.RuntimeException: Error getting reflective information for class com.mycompany.myapp.common.jms.servlets.StationLogout at org.jboss.as.server.deployment.reflect.DeploymentReflectionIndex.getClassIndex(DeploymentReflectionIndex.java:70) at org.jboss.as.ee.component.EEModuleClassDescription$DefaultConfigurator.configure(EEModuleClassDescription.java:144) at org.jboss.as.ee.component.EEClassConfigurationProcessor.deploy(EEClassConfigurationProcessor.java:100) at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:115) ... 5 more Caused by: java.lang.NoClassDefFoundError: JMSException at java.lang.Class.getDeclaredMethods0(Native Method) [:1.6.0_26] at java.lang.Class.privateGetDeclaredMethods(Class.java:2427) [:1.6.0_26] at java.lang.Class.getDeclaredMethods(Class.java:1791) [:1.6.0_26] at org.jboss.as.server.deployment.reflect.ClassReflectionIndex.<init>(ClassReflectionIndex.java:65) at org.jboss.as.server.deployment.reflect.DeploymentReflectionIndex.getClassIndex(DeploymentReflectionIndex.java:66) ... 8 more Caused by: java.lang.ClassNotFoundException: JMSException from [Module "deployment.myapp-maventest.war:main" from Service Module Loader] at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:191) at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:358) at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:330) at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:307) at org.jboss.modules.Conc JMSException.class is not in /jboss home/modules/javax/jms . I have this class in a jar file - javaee-api-6.0.jar . I copied this jar file to /my app/src/main/webapp/WEB-INF/lib , but I'm still receiving this ClassNotFoundException. I need help debugging. One thing I tried - I thought maybe the /jboss home/modules/javax module JBoss was loading was conflicting with my javaee-api-6.0.jar file - so I tried to exclude it with a src/main/webapp/WEB-INF/jboss-deployment-structure.xml file <jboss-deployment-structure> <deployment> <exclusions> <module name="javax.jms" /> </exclusions> </deployment> </jboss-deployment-structure> but I still get the same NoClassDefFoundError. Any advice on how to fix?