当我重新启动应用程序时，EntityManager 未注入 @Stateless EJB
EntityManager not injected in a @Stateless EJB, when I restart the app
我的入口点是一个@Singleton，计划每分钟 运行 两次。
@Startup
@Singleton
public class MyScheduledProcess {
@Resource
protected TimerService timerService;
@Inject
private OutgoingMessageProvider provider;
// If I inject the em here, it is always well injected.
// @PersistenceContext
// EntityManager em;
/**
* Default startup method that will be called automatically to schedule the task.
*/
@PostConstruct
public void onStartup() {
// To erase all timers which may already exist...
stopAll();
// Schedule
timerService.createCalendarTimer(getScheduledExpression("* * */30"), new TimerConfig());
}
@Timeout
protected void onTimeout(final Timer timer) {
process(timer);
}
/**
* Business logic called when the timer is triggered.
* @param timer
*/
public void process(Timer t) {
logger.info("Start process");
// When em is injected here, there is no problem.
// OutgoingMessage outMsg = em.find(OutgoingMessage.class, 3L);
// logger.info("found:" + outMsg);
logger.info("provider :" + provider);
List<OutgoingMessage> findAll = provider.findByStatus("CREATED");
logger.info("Nb in list : " + findAll.size());
}
public static ScheduleExpression getScheduledExpression(String stringRepresentation) {
ScheduleExpression expression = new ScheduleExpression();
// [....]
return expression;
}
public void stopAll() {
for(Timer timer : timerService.getTimers()) {
logger.debug("Stopping " + timer);
timer.cancel();
}
}
}
在这个单例中，我注入了我的 OutgoingMessageProvider，一个无状态 bean。
@Stateless
public class OutgoingMessageProvider {
@PersistenceContext(unitName= "DefaultPU")
protected EntityManager em;
public List<OutgoingMessage> findByStatus(String status) {
logger.debug("Value of em : " + em);
return this.em.createQuery("SELECT m FROM OutgoingMessage m WHERE m.status = :status")
.setParameter("status", status)
.getResultList();
}
public OutgoingMessage findByMessageId(String messageId) {
return ........
}
public void create(OutgoingMessage entity) {
em.persist(entity);
}
....
}
当我在 weblogic (12.1.3) 上上传和部署我的 war 时，在第一次启动时，一切正常并且工作正常。
但是当我停止我的应用程序并在 Weblogic 管理控制台中再次启动它时，我有一个 "NoSuchEJBException: Bean is already undeployed." :
22:22:16.216 [[ACTIVE] ExecuteThread: '15' for queue: 'weblogic.kernel.Default (self-tuning)'] INFO com.poc.schedul.MyScheduledProcess - provider :com.poc.schedul.OutgoingMessageProvider_ek022o_NoIntfViewImpl@6b6bebf1
<11-Sep-2016 22:22:16 o'clock CEST> <Error> <EJB> <BEA-011088> <The following error occurred while invoking the ejbTimeout(javax.ejb.Timer) method of EJB MyScheduledProcess(Application: poc2, EJBComponent: poc.war).
javax.ejb.EJBException: EJB Exception: : com.oracle.pitchfork.interfaces.LifecycleCallbackException: Failure to invoke public java.lang.Object org.jboss.weld.ejb.SessionBeanInterceptor.aroundInvoke(javax.interceptor.InvocationContext) throws java.lang.Exception on bean class class org.jboss.weld.ejb.SessionBeanInterceptor with args: [LifecycleEventCallbackInvocationContext(962794227)]
at com.oracle.pitchfork.inject.Jsr250Metadata.invokeLifecycleMethod(Jsr250Metadata.java:379)
at com.oracle.pitchfork.intercept.LifecycleEventCallbackInvocationContext.proceed(LifecycleEventCallbackInvocationContext.java:115)
at com.oracle.pitchfork.intercept.LifecycleEventCallbackInvocationContext.proceed(LifecycleEventCallbackInvocationContext.java:144)
at com.oracle.pitchfork.intercept.InterceptionMetadata.invokeTimeoutMethod(InterceptionMetadata.java:531)
at weblogic.ejb.container.injection.EjbComponentCreatorImpl.invokeTimer(EjbComponentCreatorImpl.java:71)
at weblogic.ejb.container.injection.InjectionBasedEjbComponentCreator.invokeTimer(InjectionBasedEjbComponentCreator.java:152)
at weblogic.ejb.container.manager.BaseEJBManager.invokeTimeoutMethod(BaseEJBManager.java:176)
at weblogic.ejb.container.timer.TimerImpl.timerExpired(TimerImpl.java:340)
at weblogic.timers.internal.TimerImpl.run(TimerImpl.java:304)
at weblogic.work.SelfTuningWorkManagerImpl$WorkAdapterImpl.run(SelfTuningWorkManagerImpl.java:548)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:311)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:263)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedMethodAccessor927.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.oracle.pitchfork.inject.Jsr250Metadata.invokeLifecycleMethod(Jsr250Metadata.java:377)
... 11 more
Caused by: com.oracle.pitchfork.interfaces.LifecycleCallbackException: Failure to invoke timeout method protected void com.poc.schedul.MyScheduledProcess.onTimeout(javax.ejb.Timer) on bean class class com.poc.schedul.MyScheduledProcess_szpi74_Impl with args: [[EJB Timer] id: 44 pk: 1 info: null isAutoCreated: false timer: 1473625336209.6(0) state: 2 ejb: MyScheduledProcess(Application: poc2, EJBComponent: poc.war) Thread: Thread[[ACTIVE] ExecuteThread: '15' for queue: 'weblogic.kernel.Default (self-tuning)',5,Pooled Threads]]]
at com.oracle.pitchfork.inject.Jsr250Metadata.invokeTimeoutMethodInternal(Jsr250Metadata.java:364)
at com.oracle.pitchfork.intercept.LifecycleEventCallbackInvocationContext.proceed(LifecycleEventCallbackInvocationContext.java:120)
at org.jboss.weld.ejb.SessionBeanInterceptor.aroundInvoke(SessionBeanInterceptor.java:49)
... 15 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.oracle.pitchfork.inject.Jsr250Metadata.invokeTimeoutMethodInternal(Jsr250Metadata.java:362)
... 17 more
Caused by: javax.ejb.NoSuchEJBException: Bean is already undeployed.
at weblogic.ejb.container.manager.BaseEJBManager.ensureDeployed(BaseEJBManager.java:131)
at weblogic.ejb.container.manager.BaseEJBManager.preInvoke(BaseEJBManager.java:136)
at weblogic.ejb.container.manager.StatelessManager.preInvoke(StatelessManager.java:138)
at weblogic.ejb.container.internal.BaseLocalObject.getBeanInstance(BaseLocalObject.java:148)
at weblogic.ejb.container.internal.BaseLocalObject.preInvoke(BaseLocalObject.java:105)
at weblogic.ejb.container.internal.BaseLocalObject.__WL_preInvoke(BaseLocalObject.java:70)
at weblogic.ejb.container.internal.SessionLocalMethodInvoker.invoke(SessionLocalMethodInvoker.java:22)
at com.poc.schedul.OutgoingMessageProvider_ek022o_NoIntfViewImpl.findByStatus(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.jboss.weld.util.reflection.SecureReflections.work(SecureReflections.java:267)
at org.jboss.weld.util.reflection.SecureReflectionAccess.run(SecureReflectionAccess.java:52)
at org.jboss.weld.util.reflection.SecureReflectionAccess.runAsInvocation(SecureReflectionAccess.java:137)
at org.jboss.weld.util.reflection.SecureReflections.invoke(SecureReflections.java:263)
at org.jboss.weld.bean.proxy.EnterpriseBeanProxyMethodHandler.invoke(EnterpriseBeanProxyMethodHandler.java:115)
at org.jboss.weld.bean.proxy.EnterpriseTargetBeanInstance.invoke(EnterpriseTargetBeanInstance.java:56)
at org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:105)
at com.poc.schedul.OutgoingMessageProvider$Proxy$_$$_Weld$Proxy$.findByStatus(OutgoingMessageProvider$Proxy$_$$_Weld$Proxy$.java)
at com.poc.schedul.MyScheduledProcess.process(MyScheduledProcess.java:90)
at com.poc.schedul.MyScheduledProcess.onTimeout(MyScheduledProcess.java:111)
... 22 more
at weblogic.ejb.container.internal.EJBRuntimeUtils.throwEJBException(EJBRuntimeUtils.java:88)
at weblogic.ejb.container.internal.BaseLocalObject.handleSystemException(BaseLocalObject.java:503)
at weblogic.ejb.container.internal.BaseLocalObject.handleSystemException(BaseLocalObject.java:446)
at weblogic.ejb.container.internal.BaseLocalObject.postInvoke1(BaseLocalObject.java:251)
at weblogic.ejb.container.internal.BaseLocalObject.postInvoke(BaseLocalObject.java:431)
Truncated. see log file for complete stacktrace
Caused By: com.oracle.pitchfork.interfaces.LifecycleCallbackException: Failure to invoke public java.lang.Object org.jboss.weld.ejb.SessionBeanInterceptor.aroundInvoke(javax.interceptor.InvocationContext) throws java.lang.Exception on bean class class org.jboss.weld.ejb.SessionBeanInterceptor with args: [LifecycleEventCallbackInvocationContext(962794227)]
at com.oracle.pitchfork.inject.Jsr250Metadata.invokeLifecycleMethod(Jsr250Metadata.java:379)
at com.oracle.pitchfork.intercept.LifecycleEventCallbackInvocationContext.proceed(LifecycleEventCallbackInvocationContext.java:115)
at com.oracle.pitchfork.intercept.LifecycleEventCallbackInvocationContext.proceed(LifecycleEventCallbackInvocationContext.java:144)
at com.oracle.pitchfork.intercept.InterceptionMetadata.invokeTimeoutMethod(InterceptionMetadata.java:531)
at weblogic.ejb.container.injection.EjbComponentCreatorImpl.invokeTimer(EjbComponentCreatorImpl.java:71)
Truncated. see log file for complete stacktrace
Caused By: java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedMethodAccessor927.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.oracle.pitchfork.inject.Jsr250Metadata.invokeLifecycleMethod(Jsr250Metadata.java:377)
at com.oracle.pitchfork.intercept.LifecycleEventCallbackInvocationContext.proceed(LifecycleEventCallbackInvocationContext.java:115)
Truncated. see log file for complete stacktrace
Caused By: com.oracle.pitchfork.interfaces.LifecycleCallbackException: Failure to invoke timeout method protected void com.poc.schedul.MyScheduledProcess.onTimeout(javax.ejb.Timer) on bean class class com.poc.schedul.MyScheduledProcess_szpi74_Impl with args: [[EJB Timer] id: 44 pk: 1 info: null isAutoCreated: false timer: 1473625336209.6(0) state: 2 ejb: MyScheduledProcess(Application: poc2, EJBComponent: poc.war) Thread: Thread[[ACTIVE] ExecuteThread: '15' for queue: 'weblogic.kernel.Default (self-tuning)',5,Pooled Threads]]]
at com.oracle.pitchfork.inject.Jsr250Metadata.invokeTimeoutMethodInternal(Jsr250Metadata.java:364)
at com.oracle.pitchfork.intercept.LifecycleEventCallbackInvocationContext.proceed(LifecycleEventCallbackInvocationContext.java:120)
at org.jboss.weld.ejb.SessionBeanInterceptor.aroundInvoke(SessionBeanInterceptor.java:49)
at sun.reflect.GeneratedMethodAccessor927.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
Truncated. see log file for complete stacktrace
Caused By: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.oracle.pitchfork.inject.Jsr250Metadata.invokeTimeoutMethodInternal(Jsr250Metadata.java:362)
Truncated. see log file for complete stacktrace
Caused By: javax.ejb.NoSuchEJBException: Bean is already undeployed.
at weblogic.ejb.container.manager.BaseEJBManager.ensureDeployed(BaseEJBManager.java:131)
at weblogic.ejb.container.manager.BaseEJBManager.preInvoke(BaseEJBManager.java:136)
at weblogic.ejb.container.manager.StatelessManager.preInvoke(StatelessManager.java:138)
at weblogic.ejb.container.internal.BaseLocalObject.getBeanInstance(BaseLocalObject.java:148)
at weblogic.ejb.container.internal.BaseLocalObject.preInvoke(BaseLocalObject.java:105)
Truncated. see log file for complete stacktrace
那么，有人能解释一下为什么我部署我的应用程序时一切正常，而当我重新启动时却出错了吗？当应用程序启动或停止时，应用程序服务器会发生什么情况？
正如我们在日志中看到的那样，Singleton 知道提供者，所以我只能想象提供者不知道实体管理器......我错了吗？但是，如果我尝试在单例中注入 EntityManager，一切正常。那么这意味着 entityManager 由应用服务器很好地管理......那么为什么它不注入到无状态 bean 中？
我尝试通过添加 PostConstruct（并删除 @PersistenceContext...）在提供程序中实例化自己的实体管理器：
@PostConstruct
public void init()
{
EntityManagerFactory emf = Persistence.createEntityManagerFactory("DefaultPU");
em = emf.createEntityManager(); }
logger.info("ENTITY MANAGER HAS BEEN SET : " +em);
}
但是这个方法只被调用了一次，重启应用程序后我的日志中没有任何痕迹。
正常吗？
问题已通过在我的单例中用@EJB 替换@Inject 得到解决：
@Startup
@Singleton
public class MyScheduledProcess {
@Resource
protected TimerService timerService;
@EJB
private OutgoingMessageProvider provider;
...
是的，它与@EJB 一起工作似乎符合逻辑。
但我不明白我用 @Inject 描述的行为：第一次（部署后）工作正常，但当我停止并再次启动时注入失败 war。如果有人知道，请随时分享:)
我的入口点是一个@Singleton，计划每分钟 运行 两次。
@Startup
@Singleton
public class MyScheduledProcess {
@Resource
protected TimerService timerService;
@Inject
private OutgoingMessageProvider provider;
// If I inject the em here, it is always well injected.
// @PersistenceContext
// EntityManager em;
/**
* Default startup method that will be called automatically to schedule the task.
*/
@PostConstruct
public void onStartup() {
// To erase all timers which may already exist...
stopAll();
// Schedule
timerService.createCalendarTimer(getScheduledExpression("* * */30"), new TimerConfig());
}
@Timeout
protected void onTimeout(final Timer timer) {
process(timer);
}
/**
* Business logic called when the timer is triggered.
* @param timer
*/
public void process(Timer t) {
logger.info("Start process");
// When em is injected here, there is no problem.
// OutgoingMessage outMsg = em.find(OutgoingMessage.class, 3L);
// logger.info("found:" + outMsg);
logger.info("provider :" + provider);
List<OutgoingMessage> findAll = provider.findByStatus("CREATED");
logger.info("Nb in list : " + findAll.size());
}
public static ScheduleExpression getScheduledExpression(String stringRepresentation) {
ScheduleExpression expression = new ScheduleExpression();
// [....]
return expression;
}
public void stopAll() {
for(Timer timer : timerService.getTimers()) {
logger.debug("Stopping " + timer);
timer.cancel();
}
}
}
在这个单例中，我注入了我的 OutgoingMessageProvider，一个无状态 bean。
@Stateless
public class OutgoingMessageProvider {
@PersistenceContext(unitName= "DefaultPU")
protected EntityManager em;
public List<OutgoingMessage> findByStatus(String status) {
logger.debug("Value of em : " + em);
return this.em.createQuery("SELECT m FROM OutgoingMessage m WHERE m.status = :status")
.setParameter("status", status)
.getResultList();
}
public OutgoingMessage findByMessageId(String messageId) {
return ........
}
public void create(OutgoingMessage entity) {
em.persist(entity);
}
....
}
当我在 weblogic (12.1.3) 上上传和部署我的 war 时，在第一次启动时，一切正常并且工作正常。 但是当我停止我的应用程序并在 Weblogic 管理控制台中再次启动它时，我有一个 "NoSuchEJBException: Bean is already undeployed." :
22:22:16.216 [[ACTIVE] ExecuteThread: '15' for queue: 'weblogic.kernel.Default (self-tuning)'] INFO com.poc.schedul.MyScheduledProcess - provider :com.poc.schedul.OutgoingMessageProvider_ek022o_NoIntfViewImpl@6b6bebf1
<11-Sep-2016 22:22:16 o'clock CEST> <Error> <EJB> <BEA-011088> <The following error occurred while invoking the ejbTimeout(javax.ejb.Timer) method of EJB MyScheduledProcess(Application: poc2, EJBComponent: poc.war).
javax.ejb.EJBException: EJB Exception: : com.oracle.pitchfork.interfaces.LifecycleCallbackException: Failure to invoke public java.lang.Object org.jboss.weld.ejb.SessionBeanInterceptor.aroundInvoke(javax.interceptor.InvocationContext) throws java.lang.Exception on bean class class org.jboss.weld.ejb.SessionBeanInterceptor with args: [LifecycleEventCallbackInvocationContext(962794227)]
at com.oracle.pitchfork.inject.Jsr250Metadata.invokeLifecycleMethod(Jsr250Metadata.java:379)
at com.oracle.pitchfork.intercept.LifecycleEventCallbackInvocationContext.proceed(LifecycleEventCallbackInvocationContext.java:115)
at com.oracle.pitchfork.intercept.LifecycleEventCallbackInvocationContext.proceed(LifecycleEventCallbackInvocationContext.java:144)
at com.oracle.pitchfork.intercept.InterceptionMetadata.invokeTimeoutMethod(InterceptionMetadata.java:531)
at weblogic.ejb.container.injection.EjbComponentCreatorImpl.invokeTimer(EjbComponentCreatorImpl.java:71)
at weblogic.ejb.container.injection.InjectionBasedEjbComponentCreator.invokeTimer(InjectionBasedEjbComponentCreator.java:152)
at weblogic.ejb.container.manager.BaseEJBManager.invokeTimeoutMethod(BaseEJBManager.java:176)
at weblogic.ejb.container.timer.TimerImpl.timerExpired(TimerImpl.java:340)
at weblogic.timers.internal.TimerImpl.run(TimerImpl.java:304)
at weblogic.work.SelfTuningWorkManagerImpl$WorkAdapterImpl.run(SelfTuningWorkManagerImpl.java:548)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:311)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:263)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedMethodAccessor927.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.oracle.pitchfork.inject.Jsr250Metadata.invokeLifecycleMethod(Jsr250Metadata.java:377)
... 11 more
Caused by: com.oracle.pitchfork.interfaces.LifecycleCallbackException: Failure to invoke timeout method protected void com.poc.schedul.MyScheduledProcess.onTimeout(javax.ejb.Timer) on bean class class com.poc.schedul.MyScheduledProcess_szpi74_Impl with args: [[EJB Timer] id: 44 pk: 1 info: null isAutoCreated: false timer: 1473625336209.6(0) state: 2 ejb: MyScheduledProcess(Application: poc2, EJBComponent: poc.war) Thread: Thread[[ACTIVE] ExecuteThread: '15' for queue: 'weblogic.kernel.Default (self-tuning)',5,Pooled Threads]]]
at com.oracle.pitchfork.inject.Jsr250Metadata.invokeTimeoutMethodInternal(Jsr250Metadata.java:364)
at com.oracle.pitchfork.intercept.LifecycleEventCallbackInvocationContext.proceed(LifecycleEventCallbackInvocationContext.java:120)
at org.jboss.weld.ejb.SessionBeanInterceptor.aroundInvoke(SessionBeanInterceptor.java:49)
... 15 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.oracle.pitchfork.inject.Jsr250Metadata.invokeTimeoutMethodInternal(Jsr250Metadata.java:362)
... 17 more
Caused by: javax.ejb.NoSuchEJBException: Bean is already undeployed.
at weblogic.ejb.container.manager.BaseEJBManager.ensureDeployed(BaseEJBManager.java:131)
at weblogic.ejb.container.manager.BaseEJBManager.preInvoke(BaseEJBManager.java:136)
at weblogic.ejb.container.manager.StatelessManager.preInvoke(StatelessManager.java:138)
at weblogic.ejb.container.internal.BaseLocalObject.getBeanInstance(BaseLocalObject.java:148)
at weblogic.ejb.container.internal.BaseLocalObject.preInvoke(BaseLocalObject.java:105)
at weblogic.ejb.container.internal.BaseLocalObject.__WL_preInvoke(BaseLocalObject.java:70)
at weblogic.ejb.container.internal.SessionLocalMethodInvoker.invoke(SessionLocalMethodInvoker.java:22)
at com.poc.schedul.OutgoingMessageProvider_ek022o_NoIntfViewImpl.findByStatus(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.jboss.weld.util.reflection.SecureReflections.work(SecureReflections.java:267)
at org.jboss.weld.util.reflection.SecureReflectionAccess.run(SecureReflectionAccess.java:52)
at org.jboss.weld.util.reflection.SecureReflectionAccess.runAsInvocation(SecureReflectionAccess.java:137)
at org.jboss.weld.util.reflection.SecureReflections.invoke(SecureReflections.java:263)
at org.jboss.weld.bean.proxy.EnterpriseBeanProxyMethodHandler.invoke(EnterpriseBeanProxyMethodHandler.java:115)
at org.jboss.weld.bean.proxy.EnterpriseTargetBeanInstance.invoke(EnterpriseTargetBeanInstance.java:56)
at org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:105)
at com.poc.schedul.OutgoingMessageProvider$Proxy$_$$_Weld$Proxy$.findByStatus(OutgoingMessageProvider$Proxy$_$$_Weld$Proxy$.java)
at com.poc.schedul.MyScheduledProcess.process(MyScheduledProcess.java:90)
at com.poc.schedul.MyScheduledProcess.onTimeout(MyScheduledProcess.java:111)
... 22 more
at weblogic.ejb.container.internal.EJBRuntimeUtils.throwEJBException(EJBRuntimeUtils.java:88)
at weblogic.ejb.container.internal.BaseLocalObject.handleSystemException(BaseLocalObject.java:503)
at weblogic.ejb.container.internal.BaseLocalObject.handleSystemException(BaseLocalObject.java:446)
at weblogic.ejb.container.internal.BaseLocalObject.postInvoke1(BaseLocalObject.java:251)
at weblogic.ejb.container.internal.BaseLocalObject.postInvoke(BaseLocalObject.java:431)
Truncated. see log file for complete stacktrace
Caused By: com.oracle.pitchfork.interfaces.LifecycleCallbackException: Failure to invoke public java.lang.Object org.jboss.weld.ejb.SessionBeanInterceptor.aroundInvoke(javax.interceptor.InvocationContext) throws java.lang.Exception on bean class class org.jboss.weld.ejb.SessionBeanInterceptor with args: [LifecycleEventCallbackInvocationContext(962794227)]
at com.oracle.pitchfork.inject.Jsr250Metadata.invokeLifecycleMethod(Jsr250Metadata.java:379)
at com.oracle.pitchfork.intercept.LifecycleEventCallbackInvocationContext.proceed(LifecycleEventCallbackInvocationContext.java:115)
at com.oracle.pitchfork.intercept.LifecycleEventCallbackInvocationContext.proceed(LifecycleEventCallbackInvocationContext.java:144)
at com.oracle.pitchfork.intercept.InterceptionMetadata.invokeTimeoutMethod(InterceptionMetadata.java:531)
at weblogic.ejb.container.injection.EjbComponentCreatorImpl.invokeTimer(EjbComponentCreatorImpl.java:71)
Truncated. see log file for complete stacktrace
Caused By: java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedMethodAccessor927.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.oracle.pitchfork.inject.Jsr250Metadata.invokeLifecycleMethod(Jsr250Metadata.java:377)
at com.oracle.pitchfork.intercept.LifecycleEventCallbackInvocationContext.proceed(LifecycleEventCallbackInvocationContext.java:115)
Truncated. see log file for complete stacktrace
Caused By: com.oracle.pitchfork.interfaces.LifecycleCallbackException: Failure to invoke timeout method protected void com.poc.schedul.MyScheduledProcess.onTimeout(javax.ejb.Timer) on bean class class com.poc.schedul.MyScheduledProcess_szpi74_Impl with args: [[EJB Timer] id: 44 pk: 1 info: null isAutoCreated: false timer: 1473625336209.6(0) state: 2 ejb: MyScheduledProcess(Application: poc2, EJBComponent: poc.war) Thread: Thread[[ACTIVE] ExecuteThread: '15' for queue: 'weblogic.kernel.Default (self-tuning)',5,Pooled Threads]]]
at com.oracle.pitchfork.inject.Jsr250Metadata.invokeTimeoutMethodInternal(Jsr250Metadata.java:364)
at com.oracle.pitchfork.intercept.LifecycleEventCallbackInvocationContext.proceed(LifecycleEventCallbackInvocationContext.java:120)
at org.jboss.weld.ejb.SessionBeanInterceptor.aroundInvoke(SessionBeanInterceptor.java:49)
at sun.reflect.GeneratedMethodAccessor927.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
Truncated. see log file for complete stacktrace
Caused By: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.oracle.pitchfork.inject.Jsr250Metadata.invokeTimeoutMethodInternal(Jsr250Metadata.java:362)
Truncated. see log file for complete stacktrace
Caused By: javax.ejb.NoSuchEJBException: Bean is already undeployed.
at weblogic.ejb.container.manager.BaseEJBManager.ensureDeployed(BaseEJBManager.java:131)
at weblogic.ejb.container.manager.BaseEJBManager.preInvoke(BaseEJBManager.java:136)
at weblogic.ejb.container.manager.StatelessManager.preInvoke(StatelessManager.java:138)
at weblogic.ejb.container.internal.BaseLocalObject.getBeanInstance(BaseLocalObject.java:148)
at weblogic.ejb.container.internal.BaseLocalObject.preInvoke(BaseLocalObject.java:105)
Truncated. see log file for complete stacktrace
那么，有人能解释一下为什么我部署我的应用程序时一切正常，而当我重新启动时却出错了吗？当应用程序启动或停止时，应用程序服务器会发生什么情况？
正如我们在日志中看到的那样，Singleton 知道提供者，所以我只能想象提供者不知道实体管理器......我错了吗？但是，如果我尝试在单例中注入 EntityManager，一切正常。那么这意味着 entityManager 由应用服务器很好地管理......那么为什么它不注入到无状态 bean 中？
我尝试通过添加 PostConstruct（并删除 @PersistenceContext...）在提供程序中实例化自己的实体管理器：
@PostConstruct
public void init()
{
EntityManagerFactory emf = Persistence.createEntityManagerFactory("DefaultPU");
em = emf.createEntityManager(); }
logger.info("ENTITY MANAGER HAS BEEN SET : " +em);
}
但是这个方法只被调用了一次，重启应用程序后我的日志中没有任何痕迹。
正常吗？
问题已通过在我的单例中用@EJB 替换@Inject 得到解决：
@Startup
@Singleton
public class MyScheduledProcess {
@Resource
protected TimerService timerService;
@EJB
private OutgoingMessageProvider provider;
...
是的，它与@EJB 一起工作似乎符合逻辑。
但我不明白我用 @Inject 描述的行为：第一次（部署后）工作正常，但当我停止并再次启动时注入失败 war。如果有人知道，请随时分享:)