[jboss-user] [EJB/JBoss] - RuntimeException: java.lang.NullPointerException in JBoss 4.

Does anyone know the cause of this exception? Thanks ------------------ anonymous wrote : java.lang.RuntimeException: java.lang.NullPointerException | at org.jboss.ejb3.interceptor.LifecycleInterceptorHandler.postConstruct(LifecycleInterceptorHandler.java:113) | at org.jboss.ejb3.EJBContainer.invokePostConstruct(EJBContainer.java:505) | at org.jboss.ejb3.AbstractPool.create(AbstractPool.java:112) | at org.jboss.ejb3.ThreadlocalPool.get(ThreadlocalPool.java:48) | at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:54) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77) | at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:102) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:47) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:263) | at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106) | at org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82) | at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:828) | at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:681) | at org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:358) | at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:398) | at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:239) | Caused by: java.lang.NullPointerException | at org.jboss.ejb3.entity.ManagedEntityManagerFactory.getNonTxEntityManager(ManagedEntityManagerFactory.java:59) | at org.jboss.ejb3.entity.ManagedEntityManagerFactory.getTransactionScopedEntityManager(ManagedEntityManagerFactory.java:164) | at org.jboss.ejb3.entity.TransactionScopedEntityManager.createQuery(TransactionScopedEntityManager.java:125) | at com.judots.exchange.maintenance.ExchangeMaintenanceBean.init(ExchangeMaintenanceBean.java:49) | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) | at java.lang.reflect.Method.invoke(Unknown Source) | at org.jboss.ejb3.interceptor.LifecycleInvocationContextImpl.proceed(LifecycleInvocationContextImpl.java:159) | at org.jboss.ejb3.interceptor.LifecycleInterceptorHandler.postConstruct(LifecycleInterceptorHandler.java:109) | at org.jboss.ejb3.EJBContainer.invokePostConstruct(EJBContainer.java:505) | at org.jboss.ejb3.AbstractPool.create(AbstractPool.java:112) | at org.jboss.ejb3.ThreadlocalPool.get(ThreadlocalPool.java:48) | at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:54) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77) | at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:102) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:47) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:263) | at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106) | at org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82) | at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:828) | at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:681) | at org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:358) | at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:398) | at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:239) | at org.jboss.remoting.RemoteClientInvoker.invoke(RemoteClientInvoker.java:190) | at org.jboss.remoting.Client.invoke(Client.java:525) | at org.jboss.remoting.Client.invoke(Client.java:488) | at org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:55) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(ClientTxPropagationInterceptor.java:61) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.aspects.security.SecurityClientInterceptor.invoke(SecurityClientInterceptor.java:53) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:77) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.ejb3.stateless.StatelessRemoteProxy.invoke(StatelessRemoteProxy.java:102) | at $Proxy6.loadExchangeData(Unknown Source) | at com.judots.exchange.test.LoadExchangeData.openExchange(LoadExchangeData.java:67) | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) | at java.lang.reflect.Method.invoke(Unknown Source) | at org.junit.internal.runners.TestMethodRunner.executeMethodBody(TestMethodRunner.java:99) | at org.junit.internal.runners.TestMethodRunner.runUnprotected(TestMethodRunner.java:81) | at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34) | at org.junit.internal.runners.TestMethodRunner.runMethod(TestMethodRunner.java:75) | at org.junit.internal.runners.TestMethodRunner.run(TestMethodRunner.java:45) | at org.junit.internal.runners.TestClassMethodsRunner.invokeTestMethod(TestClassMethodsRunner.java:71) | at org.junit.internal.runners.TestClassMethodsRunner.run(TestClassMethodsRunner.java:35) | at org.junit.internal.runners.TestClassRunner$1.runUnprotected(TestClassRunner.java:42) | at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34) | at org.junit.internal.runners.TestClassRunner.run(TestClassRunner.java:52) | at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:38) | at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) | at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460) | at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673) | at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386) | at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196) | | | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4033546#... 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