Steps:
1. Create jpa 2.0 project (target runtime jboss-eap 5.1, hibernate platform, hsql connection, discover classes automatically)
2. Add JPA entity
3. Open hibernate console

org.hibernate.console.HibernateConsoleRuntimeException: Could not create JPA based Configuration
at org.hibernate.console.ConfigurationFactory.buildJPAConfiguration(ConfigurationFactory.java:242)
at org.hibernate.console.ConfigurationFactory.buildConfiguration(ConfigurationFactory.java:172)
at org.hibernate.console.ConfigurationFactory.createConfiguration(ConfigurationFactory.java:94)
at org.hibernate.console.ConsoleConfiguration$3.execute(ConsoleConfiguration.java:209)
at org.hibernate.console.execution.DefaultExecutionContext.execute(DefaultExecutionContext.java:63)
at org.hibernate.console.ConsoleConfiguration.execute(ConsoleConfiguration.java:71)
at org.hibernate.console.ConsoleConfiguration.buildWith(ConsoleConfiguration.java:206)
at org.hibernate.console.ConsoleConfiguration.build(ConsoleConfiguration.java:162)
at org.hibernate.eclipse.console.workbench.ConsoleConfigurationWorkbenchAdapter.getChildren(ConsoleConfigurationWorkbenchAdapter.java:40)
at org.hibernate.eclipse.console.workbench.BasicWorkbenchAdapter.getChildren(BasicWorkbenchAdapter.java:100)
at org.hibernate.eclipse.console.workbench.BasicWorkbenchAdapter.fetchDeferredChildren(BasicWorkbenchAdapter.java:106)
at org.eclipse.ui.progress.DeferredTreeContentManager$1.run(DeferredTreeContentManager.java:235)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.hibernate.console.ConfigurationFactory.buildJPAConfiguration(ConfigurationFactory.java:229)
... 12 more
Caused by: javax.persistence.PersistenceException: [PersistenceUnit: jpatest1] Unable to configure EntityManagerFactory
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:376)
... 17 more
Caused by: org.hibernate.AnnotationException: No identifier specified for entity: org.example2.Customer2
at org.hibernate.cfg.InheritanceState.determineDefaultAccessType(InheritanceState.java:272)
at org.hibernate.cfg.InheritanceState.getElementsToProcess(InheritanceState.java:227)
at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:712)
at org.hibernate.cfg.AnnotationConfiguration.processArtifactsOfType(AnnotationConfiguration.java:636)
at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:359)
at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1206)
at org.hibernate.ejb.Ejb3Configuration.buildMappings(Ejb3Configuration.java:1459)
at org.hibernate.ejb.EventListenerConfigurator.configure(EventListenerConfigurator.java:193)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:1086)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:280)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:364)