From JPA 2.1 section 3.5.1 Entity Listeners:

CDI injection in entity listeners failing ----------------------------------------- Key: WFLY-2387 URL: https://issues.jboss.org/browse/WFLY-2387 Project: WildFly Issue Type: Bug Components: CDI / Weld, Class Loading, JPA / Hibernate Affects Versions: 8.0.0.Beta1 Reporter: Emond Papegaaij Assignee: Scott Marlow Attachments: TEST-org.jboss.as.test.integration.ee.injection.support.jpa.EntityListenerInjectionSupportTestCase.xml When trying to use CDI injection in JPA entity listeners, deployment fails with the following exception: {code} 16:16:37,448 ERROR [org.jboss.msc.service.fail] (ServerService Thread Pool -- 15) MSC000001: Failed to start service jboss.persistenceunit."inject-ear.ear#primary": org.jboss.msc.service.StartException in service jboss.persistenceunit."inject-ear.ear#primary": java.lang.IllegalStateException: JBAS016071: Singleton not set for org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl$AggregatedClassLoader@4eeb95dc. This means that you are trying to access a weld deployment with a Thread Context ClassLoader that is not associated with the deployment. at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:169) at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:117) at java.security.AccessController.doPrivileged(Native Method) [rt.jar:1.7.0_25] at org.wildfly.security.manager.WildFlySecurityManager.doChecked(WildFlySecurityManager.java:463) [wildfly-security-manager-1.0.0.Beta3.jar:1.0.0.Beta3] at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1.run(PersistenceUnitServiceImpl.java:178) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_25] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_25] at java.lang.Thread.run(Thread.java:724) [rt.jar:1.7.0_25] at org.jboss.threads.JBossThread.run(JBossThread.java:122) [jboss-threads-2.1.1.Final.jar:2.1.1.Final] Caused by: java.lang.IllegalStateException: JBAS016071: Singleton not set for org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl$AggregatedClassLoader@4eeb95dc. This means that you are trying to access a weld deployment with a Thread Context ClassLoader that is not associated with the deployment. at org.jboss.as.weld.services.ModuleGroupSingletonProvider$TCCLSingleton.get(ModuleGroupSingletonProvider.java:75) at org.jboss.as.weld.services.ModuleGroupSingletonProvider$TCCLSingleton.get(ModuleGroupSingletonProvider.java:128) at org.jboss.weld.Container.instance(Container.java:65) at org.jboss.weld.manager.BeanManagerImpl.getBeans(BeanManagerImpl.java:563) at org.jboss.weld.injection.FieldInjectionPoint.inject(FieldInjectionPoint.java:90) at org.jboss.weld.util.Beans.injectBoundFields(Beans.java:358) at org.jboss.weld.util.Beans.injectFieldsAndInitializers(Beans.java:369) at org.jboss.weld.injection.producer.DefaultInjector.inject(DefaultInjector.java:72) at org.jboss.weld.injection.producer.ResourceInjector.inject(ResourceInjector.java:60) at org.jboss.weld.injection.producer.DefaultInjector$1.proceed(DefaultInjector.java:66) at org.jboss.weld.injection.InjectionContextImpl.run(InjectionContextImpl.java:48) at org.jboss.weld.injection.producer.DefaultInjector.inject(DefaultInjector.java:64) at org.jboss.weld.injection.producer.BasicInjectionTarget.inject(BasicInjectionTarget.java:90) at org.hibernate.jpa.event.internal.jpa.BeanManagerListenerFactory$BeanMetaData.<init>(BeanManagerListenerFactory.java:82) at org.hibernate.jpa.event.internal.jpa.BeanManagerListenerFactory$BeanMetaData.<init>(BeanManagerListenerFactory.java:71) at org.hibernate.jpa.event.internal.jpa.BeanManagerListenerFactory.buildListener(BeanManagerListenerFactory.java:57) at org.hibernate.jpa.event.internal.jpa.LegacyCallbackProcessor.resolveCallbacks(LegacyCallbackProcessor.java:168) at org.hibernate.jpa.event.internal.jpa.LegacyCallbackProcessor.processCallbacksForEntity(LegacyCallbackProcessor.java:71) at org.hibernate.jpa.event.spi.JpaIntegrator.integrate(JpaIntegrator.java:150) at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:310) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1837) at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:854) at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:847) at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:396) at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:846) at org.jboss.as.jpa.hibernate4.TwoPhaseBootstrapImpl.build(TwoPhaseBootstrapImpl.java:44) at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:151) ... 8 more {code} I've created a small showcase of the problem: https://github.com/papegaaij/listener-injection