@DependsOn not adherent to Java EE 7 spec ----------------------------------------- Key: WFLY-4251 URL: https://issues.jboss.org/browse/WFLY-4251 Project: WildFly Issue Type: Bug Components: EE, EJB Affects Versions: 8.2.0.Final Reporter: Matteo Mortari Assignee: Jason Greene Priority: Minor *Premise*: actually, I'm leveraging this misalignment for implementing a functionality; however, I don't believe is correct behavior accordingly to Java EE 7 specs, hence reporting it. h5. Executive summary With reference to attached reproducer, and example scenario below; the {{@DependsOn}} annotation on wildfly 8.2.0.Final works also against Stateless EJB, but accordingly to Java EE 7 specs {{@DependsOn}} annotation: {quote} Used to express an initialization dependency between singleton components. {quote} h5. Detailed description Assume you have a {{@Singleton}} and while on {{@PreDestroy}} you need to persist some entities, which are normally done through a Stateless EJB serving as a "Controller"/"DAO", example: {code:java} @Singleton @Startup //@DependsOn(value={"AStatelessEJB"}) public class SingletonEJB { private static final Logger LOG = LoggerFactory.getLogger(SingletonEJB.class); @EJB private AStatelessEJB sl; @PostConstruct public void init() { LOG.info("SingletonEJB is here."); } @PreDestroy public void shutdown() { LOG.info("SingletonEJB is about to shutdown..."); sl.dummyPersist(); // line #30 } } {code} with the {{@DependsOn}} annotation currently commented, and where: {code:java} @Stateless(name="AStatelessEJB", mappedName="AStatelessEJB") public class AStatelessEJB { private static final Logger LOG = LoggerFactory.getLogger(AStatelessEJB.class); public void dummyPersist() { LOG.info("called dummyPersist()."); } } {code} just for simulating a "controller"/"DAO" example as a Stateless EJB. Invoking wildfly shutdown will produce the following stacktrace: {noformat} 19:26:34,570 INFO [org.jboss.as] (Controller Boot Thread) JBAS015874: WildFly 8.2.0.Final "Tweek" started in 98671ms - Started 347 of 399 services (107 services are lazy, passive or on-demand) 19:26:45,136 INFO [org.wildfly.extension.undertow] (MSC service thread 1-7) JBAS017535: Unregistered web context: /wildfly82-dependson ... 19:26:45,213 INFO [com.acme.wildfly82_dependson.SingletonEJB] (ServerService Thread Pool -- 24) SingletonEJB is about to shutdown... ... 19:26:45,213 ERROR [org.jboss.as.ejb3.invocation] (ServerService Thread Pool -- 24) JBAS014134: EJB Invocation failed on component AStatelessEJB for method public void com.acme.wildfly82_dependson.AStatelessEJB.dummyPersist(): org.jboss.as.ejb3.component.EJBComponentUnavailableException: JBAS014559: Invocation cannot proceed as component is shutting down ... at com.acme.wildfly82_dependson.AStatelessEJB$$$view2.dummyPersist(Unknown Source) [classes:] at com.acme.wildfly82_dependson.SingletonEJB.shutdown(SingletonEJB.java:30) [classes:] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.8.0_05] {noformat} However, with the annotation un-commented and active: {noformat} 19:21:44,713 INFO [org.jboss.as] (Controller Boot Thread) JBAS015874: WildFly 8.2.0.Final "Tweek" started in 109462ms - Started 347 of 399 services (107 services are lazy, passive or on-demand) ... 19:22:17,908 INFO [org.wildfly.extension.undertow] (MSC service thread 1-3) JBAS017535: Unregistered web context: /wildfly82-dependson 19:22:17,971 INFO [org.wildfly.extension.undertow] (MSC service thread 1-8) JBAS017532: Host default-host stopping ... 19:22:18,017 INFO [com.acme.wildfly82_dependson.SingletonEJB] (ServerService Thread Pool -- 68) SingletonEJB is about to shutdown... 19:22:18,033 INFO [com.acme.wildfly82_dependson.AStatelessEJB] (ServerService Thread Pool -- 68) called dummyPersist(). ... 19:22:18,236 INFO [org.jboss.as.server.deployment] (MSC service thread 1-4) JBAS015877: Stopped deployment wildfly82-dependson.war (runtime-name: wildfly82-dependson.war) in 334ms {noformat} But I'm puzzled because as stated above the Java EE specs javadoc describe the {{@DependsOn}} annotation as _Used to express an initialization dependency between singleton components._ , therefore although I'm happy it actually works, I'm puzzled about the misalignments, hence reporting it.