关于从上下文中查找 EJB 3 无状态 bean jndi 的快速问题。是context.lookup("myBean")
返回 bean 的一个实例?我的 bean 不是单例。
我问这个问题的原因是因为我在 JBoss AS 6 上的插入和删除持久性 CRUD 服务不断出现事务超时。我有一个 Callable,其中注入(inject)了一个持久性 CRUD 无状态 bean,以便它在自己的事务中仅执行 5,000 次插入(因此存在关于返回新实例而不是每次调用返回相同实例的问题)。在 Callable.call()
方法中,我用 context.lookup("myBean")
注入(inject)无状态 bean因为我有大约 20 个 Callables 传递给 ExecutorService.submit(Callable<T>)
.
底线是我不明白为什么它在进程结束时超时(所有数据已成功插入:600,000次插入),但在作业结束时,JBoss抛出超时错误。
堆栈跟踪,“由”错误引起:
Caused by: javax.transaction.RollbackException: ARJUNA-16063 The transaction is not active! at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1148) [:6.0.0.Final] at com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.commit(BaseTransaction.java:119) [:6.0.0.Final] at com.arjuna.ats.jbossatx.BaseTransactionManagerDelegate.commit(BaseTransactionManagerDelegate.java:75) [:6.0.0.Final] at org.jboss.ejb3.tx2.impl.CMTTxInterceptor.endTransaction(CMTTxInterceptor.java:82) [:0.0.1] ... 70 more
完整堆栈跟踪:
14:40:14,609 SEVERE [context] javax.ejb.EJBTransactionRolledbackException: Transaction rolled back: javax.faces.event.AbortProcessingException: javax.ejb.EJBTransactionRolledbackException: Transactio rolled back at javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:178) [:2.0.3-] at javax.faces.event.ActionEvent.processListener(ActionEvent.java:84) [:2.0.3-] at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:773) [:2.0.3-] at javax.faces.component.UICommand.broadcast(UICommand.java:296) [:2.0.3-] at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:781) [:2.0.3-] at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1246) [:2.0.3-] at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:77) [:2.0.3-] at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:97) [:2.0.3-] at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:114) [:2.0.3-] at javax.faces.webapp.FacesServlet.service(FacesServlet.java:308) [:2.0.3-] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:324) [:6.0.0.Final] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:242) [:6.0.0.Final] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) [:6.0.0.Final] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) [:6.0.0.Final] at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:181) [:6.0.0.Final] at org.jboss.modcluster.catalina.CatalinaContext$RequestListenerValve.event(CatalinaContext.java:285) [:1.1.0.Final] at org.jboss.modcluster.catalina.CatalinaContext$RequestListenerValve.invoke(CatalinaContext.java:261) [:1.1.0.Final] at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:88) [:6.0.0.Final] at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:100) [:6.0.0.Final] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) [:6.0.0.Final] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [:6.0.0.Final] at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158) [:6.0.0.Final] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [:6.0.0.Final] at org.jboss.web.tomcat.service.request.ActiveRequestResponseCacheValve.invoke(ActiveRequestResponseCacheValve.java:53) [:6.0.0.Final] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:362) [:6.0.0.Final] at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) [:6.0.0.Final] at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:654) [:6.0.0.Final] at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:951) [:6.0.0.Final] at java.lang.Thread.run(Thread.java:619) [:1.6.0_20] Caused by: javax.ejb.EJBTransactionRolledbackException: Transaction rolled back at org.jboss.ejb3.tx2.impl.CMTTxInterceptor.handleEndTransactionException(CMTTxInterceptor.java:115) [:0.0.1] at org.jboss.ejb3.tx2.impl.CMTTxInterceptor.endTransaction(CMTTxInterceptor.java:87) [:0.0.1] at org.jboss.ejb3.tx2.impl.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:255) [:0.0.1] at org.jboss.ejb3.tx2.impl.CMTTxInterceptor.required(CMTTxInterceptor.java:349) [:0.0.1] at org.jboss.ejb3.tx2.impl.CMTTxInterceptor.invoke(CMTTxInterceptor.java:209) [:0.0.1] at org.jboss.ejb3.tx2.aop.CMTTxInterceptorWrapper.invoke(CMTTxInterceptorWrapper.java:52) [:0.0.1] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102) [jboss-aop.jar:2.2.1.GA] at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76) [:1.0.0.GA] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102) [jboss-aop.jar:2.2.1.GA] at org.jboss.ejb3.tx.NullInterceptor.invoke(NullInterceptor.java:42) [:1.0.3] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102) [jboss-aop.jar:2.2.1.GA] at org.jboss.ejb3.security.Ejb3AuthenticationInterceptorv2.invoke(Ejb3AuthenticationInterceptorv2.java:182) [:1.7.17] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102) [jboss-aop.jar:2.2.1.GA] at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:41) [:1.7.17] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102) [jboss-aop.jar:2.2.1.GA] at org.jboss.ejb3.BlockContainerShutdownInterceptor.invoke(BlockContainerShutdownInterceptor.java:67) [:1.7.17] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102) [jboss-aop.jar:2.2.1.GA] at org.jboss.ejb3.core.context.CurrentInvocationContextInterceptor.invoke(CurrentInvocationContextInterceptor.java:47) [:1.7.17] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102) [jboss-aop.jar:2.2.1.GA] at org.jboss.aspects.currentinvocation.CurrentInvocationInterceptor.invoke(CurrentInvocationInterceptor.java:67) [:1.0.1] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102) [jboss-aop.jar:2.2.1.GA] at org.jboss.ejb3.interceptor.EJB3TCCLInterceptor.invoke(EJB3TCCLInterceptor.java:86) [:1.7.17] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102) [jboss-aop.jar:2.2.1.GA] at org.jboss.ejb3.session.SessionSpecContainer.invoke(SessionSpecContainer.java:323) [:1.7.17] at org.jboss.ejb3.session.SessionSpecContainer.invoke(SessionSpecContainer.java:380) [:1.7.17] at sun.reflect.GeneratedMethodAccessor335.invoke(Unknown Source) [:1.6.0_20] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [:1.6.0_20] at java.lang.reflect.Method.invoke(Method.java:597) [:1.6.0_20] at org.jboss.ejb3.proxy.impl.handler.session.SessionLocalProxyInvocationHandler$LocalContainerInvocation.invokeTarget(SessionLocalProxyInvocationHandler.java:184) [:1.0.11] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:111) [jboss-aop.jar:2.2.1.GA] at org.jboss.ejb3.async.impl.interceptor.AsynchronousClientInterceptor.invoke(AsynchronousClientInterceptor.java:143) [:1.7.17] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102) [jboss-aop.jar:2.2.1.GA] at org.jboss.ejb3.proxy.impl.handler.session.SessionLocalProxyInvocationHandler$LocalInvokableContextHandler.invoke(SessionLocalProxyInvocationHandler.java:159) [:1.0.11] at $Proxy217.invoke(Unknown Source) at org.jboss.ejb3.proxy.impl.handler.session.SessionProxyInvocationHandlerBase.invoke(SessionProxyInvocationHandlerBase.java:185) [:1.0.11] at $Proxy220.runEngine(Unknown Source) at com.ls.forecast.web.beans.ExpectedReturnEngineBean.runEngine(ExpectedReturnEngineBean.java:20) [:] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [:1.6.0_20] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) [:1.6.0_20] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [:1.6.0_20] at java.lang.reflect.Method.invoke(Method.java:597) [:1.6.0_20] at org.apache.el.parser.AstValue.invoke(AstValue.java:196) [:6.0.0.Final] at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276) [:6.0.0.Final] at javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:149) [:2.0.3-] ... 28 more Caused by: javax.transaction.RollbackException: ARJUNA-16063 The transaction is not active! at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1148) [:6.0.0.Final] at com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.commit(BaseTransaction.java:119) [:6.0.0.Final] at com.arjuna.ats.jbossatx.BaseTransactionManagerDelegate.commit(BaseTransactionManagerDelegate.java:75) [:6.0.0.Final] at org.jboss.ejb3.tx2.impl.CMTTxInterceptor.endTransaction(CMTTxInterceptor.java:82) [:0.0.1] ... 70 more
最佳答案
对于无状态 session Bean,不能保证您始终获得相同的实例。这些 bean 最常被池化,容器将只使用池中的任何 bean。
以 5k 批处理分发的 600k 插入在并行运行时会创建 120 个 slsb,所有这些都尝试并行访问数据库,所有尝试获取锁定等。我猜您“简单地”遇到了并行运行的情况任务之间的相互阻塞足以使整个事务集超时并回滚。
您可以发布您的代码,到目前为止,这最终会读取 Crystal 球。
关于java - 调用 context.lookup ("myJndiBeanName")返回 bean 的实例?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/8900814/