Hi, I got a javax.ejb.ObjectNotFoundException: exception trying to get a CMP Bean Data written by a MessageDrivenBean: I am doing the following steps: MDB1 read some information from a topic MDB1 call the create method from a CMP Bean for saving the information in the DB MDB1 send a message to a queue with the primary key of the CMP Bean written before to the DB MDB2 read the primary key from the queue and starts a Thread parameterized with the primary key The Thread tries to get the CMP Bean data using the findByPrimaryKey method. I traced my Beans and I can recognize that the CMP Bean Data is on the DB ant the create method is finished. I suppose the problem is that the CMP.create transaction isn?t committed before I try to read the DB record using the CMP.findByPrimaryKey because it works if I insert a wait for 1000 ms and retry to execute the findByPrimaryKey method Now the question: How can I be sure that the create transaction is committed before I read it again? I am running Jboss 4.05, Oracle XE 10 and Java 1.4.2 all on the same server (ubuntu 2.6.15-26-server) here the completed exception: 19:40:38,778 ERROR [STDERR] javax.ejb.ObjectNotFoundException: No such entity! 19:40:38,779 ERROR [STDERR] at org.jboss.ejb.plugins.cmp.jdbc.JDBCFindEntityCommand.execute(JDBCFindEntityCommand.java:64) 19:40:38,779 ERROR [STDERR] at org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager.findEntity(JDBCStoreManager.java:604) 19:40:38,779 ERROR [STDERR] at org.jboss.ejb.plugins.CMPPersistenceManager.findEntity(CMPPersistenceManager.java:315) 19:40:38,779 ERROR [STDERR] at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.findEntity(CachedConnectionInterceptor.java:236) 19:40:38,779 ERROR [STDERR] at org.jboss.ejb.EntityContainer.findSingleObject(EntityContainer.java:1103) 19:40:38,780 ERROR [STDERR] at org.jboss.ejb.EntityContainer.find(EntityContainer.java:721) 19:40:38,780 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 19:40:38,780 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 19:40:38,780 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 19:40:38,780 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:324) 19:40:38,780 ERROR [STDERR] at org.jboss.invocation.Invocation.performCall(Invocation.java:359) 19:40:38,781 ERROR [STDERR] at org.jboss.ejb.EntityContainer$ContainerInterceptor.invokeHome(EntityContainer.java:1130) 19:40:38,781 ERROR [STDERR] at org.jboss.ejb.plugins.AbstractInterceptor.invokeHome(AbstractInterceptor.java:105) 19:40:38,781 ERROR [STDERR] at org.jboss.ejb.plugins.EntitySynchronizationInterceptor.invokeHome(EntitySynchronizationInterceptor.java:203) 19:40:38,781 ERROR [STDERR] at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invokeHome(CachedConnectionInterceptor.java:189) 19:40:38,781 ERROR [STDERR] at org.jboss.ejb.plugins.AbstractInterceptor.invokeHome(AbstractInterceptor.java:105) 19:40:38,781 ERROR [STDERR] at org.jboss.ejb.plugins.EntityInstanceInterceptor.invokeHome(EntityInstanceInterceptor.java:134) 19:40:38,781 ERROR [STDERR] at org.jboss.ejb.plugins.EntityLockInterceptor.invokeHome(EntityLockInterceptor.java:76) 19:40:38,781 ERROR [STDERR] at org.jboss.ejb.plugins.EntityCreationInterceptor.invokeHome(EntityCreationInterceptor.java:43) 19:40:38,782 ERROR [STDERR] at org.jboss.ejb.plugins.CallValidationInterceptor.invokeHome(CallValidationInterceptor.java:56) 19:40:38,782 ERROR [STDERR] at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:125) 19:40:38,782 ERROR [STDERR] at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:350) 19:40:38,782 ERROR [STDERR] at org.jboss.ejb.plugins.TxInterceptorCMT.invokeHome(TxInterceptorCMT.java:161) 19:40:38,782 ERROR [STDERR] at org.jboss.ejb.plugins.SecurityInterceptor.invokeHome(SecurityInterceptor.java:145) 19:40:38,782 ERROR [STDERR] at org.jboss.ejb.plugins.LogInterceptor.invokeHome(LogInterceptor.java:132) 19:40:38,783 ERROR [STDERR] at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invokeHome(ProxyFactoryFinderInterceptor.java:107) 19:40:38,783 ERROR [STDERR] at org.jboss.ejb.EntityContainer.internalInvokeHome(EntityContainer.java:514) 19:40:38,783 ERROR [STDERR] at org.jboss.ejb.Container.invoke(Container.java:975) 19:40:38,783 ERROR [STDERR] at sun.reflect.GeneratedMethodAccessor89.invoke(Unknown Source) 19:40:38,783 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 19:40:38,783 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:324) 19:40:38,783 ERROR [STDERR] at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) 19:40:38,783 ERROR [STDERR] at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) 19:40:38,784 ERROR [STDERR] at org.jboss.mx.server.Invocation.invoke(Invocation.java:86) 19:40:38,784 ERROR [STDERR] at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) 19:40:38,784 ERROR [STDERR] at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) 19:40:38,784 ERROR [STDERR] at org.jboss.invocation.local.LocalInvoker$MBeanServerAction.invoke(LocalInvoker.java:169) 19:40:38,784 ERROR [STDERR] at org.jboss.invocation.local.LocalInvoker.invoke(LocalInvoker.java:118) 19:40:38,784 ERROR [STDERR] at org.jboss.invocation.InvokerInterceptor.invokeLocal(InvokerInterceptor.java:206) 19:40:38,784 ERROR [STDERR] at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:192) 19:40:38,785 ERROR [STDERR] at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:61) 19:40:38,785 ERROR [STDERR] at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:70) 19:40:38,785 ERROR [STDERR] at org.jboss.proxy.ejb.HomeInterceptor.invoke(HomeInterceptor.java:184) 19:40:38,785 ERROR [STDERR] at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:100) 19:40:38,785 ERROR [STDERR] at $Proxy136.findByPrimaryKey(Unknown Source) 19:40:38,785 ERROR [STDERR] at edu.leipzig.taskman.TaskCache.getTask(TaskCache.java:287) 19:40:38,785 ERROR [STDERR] at edu.leipzig.taskman.ClientUpdate.addOpenTask(ClientUpdate.java:284) 19:40:38,786 ERROR [STDERR] at edu.leipzig.taskman.ClientManager.taskCreated(ClientManager.java:48) 19:40:38,786 ERROR [STDERR] at edu.leipzig.taskman.ejb.NewTask_PropagatingBean.handleClientTask(NewTask_PropagatingBean.java:254) 19:40:38,786 ERROR [STDERR] at edu.leipzig.taskman.ejb.NewTask_PropagatingBean.onMessage(NewTask_PropagatingBean.java:180) 19:40:38,786 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 19:40:38,786 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 19:40:38,786 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 19:40:38,787 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:324) 19:40:38,787 ERROR [STDERR] at org.jboss.invocation.Invocation.performCall(Invocation.java:359) 19:40:38,787 ERROR [STDERR] at org.jboss.ejb.MessageDrivenContainer$ContainerInterceptor.invoke(MessageDrivenContainer.java:495) 19:40:38,787 ERROR [STDERR] at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:158) 19:40:38,787 ERROR [STDERR] at org.jboss.ejb.plugins.MessageDrivenInstanceInterceptor.invoke(MessageDrivenInstanceInterceptor.java:116) 19:40:38,787 ERROR [STDERR] at org.jboss.ejb.plugins.CallValidationInterceptor.invoke(CallValidationInterceptor.java:63) 19:40:38,787 ERROR [STDERR] at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:121) 19:40:38,788 ERROR [STDERR] at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:350) 19:40:38,788 ERROR [STDERR] at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:181) 19:40:38,788 ERROR [STDERR] at org.jboss.ejb.plugins.RunAsSecurityInterceptor.invoke(RunAsSecurityInterceptor.java:109) 19:40:38,788 ERROR [STDERR] at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:205) 19:40:38,788 ERROR [STDERR] at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor.java:136) 19:40:38,788 ERROR [STDERR] at org.jboss.ejb.MessageDrivenContainer.internalInvoke(MessageDrivenContainer.java:402) 19:40:38,788 ERROR [STDERR] at org.jboss.ejb.Container.invoke(Container.java:954) 19:40:38,789 ERROR [STDERR] at org.jboss.ejb.plugins.jms.JMSContainerInvoker.invoke(JMSContainerInvoker.java:987) 19:40:38,789 ERROR [STDERR] at org.jboss.ejb.plugins.jms.JMSContainerInvoker$MessageListenerImpl.onMessage(JMSContainerInvoker.java:1287) 19:40:38,789 ERROR [STDERR] at org.jboss.jms.asf.StdServerSession.onMessage(StdServerSession.java:266) 19:40:38,789 ERROR [STDERR] at org.jboss.mq.SpyMessageConsumer.sessionConsumerProcessMessage(SpyMessageConsumer.java:902) 19:40:38,789 ERROR [STDERR] at org.jboss.mq.SpyMessageConsumer.addMessage(SpyMessageConsumer.java:170) 19:40:38,789 ERROR [STDERR] at org.jboss.mq.SpySession.run(SpySession.java:323) 19:40:38,790 ERROR [STDERR] at org.jboss.jms.asf.StdServerSession.run(StdServerSession.java:194) 19:40:38,790 ERROR [STDERR] at EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.java:748) 19:40:38,790 ERROR [STDERR] at java.lang.Thread.run(Thread.java:534) Any Ideas? 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