- what happen with my entity bean , need expert help

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- what happen with my entity bean , need expert help

- what happen with my entity bean , need expert help

2007-07-17 - By ejbiva

Back
I just a new learner for EJB3.0.I download the jboss-EJB-3 (See http://EJB-3.ora-code.com).0_Preview_2 for
testing ,and the session bean is ok,but when I run the entity bean ,the fatal
error occurs .That seems like lots of mess .My environment is Jboss4.2.0GA. The
exception just as follow.

[java] Exception in thread "main" javax.ejb.EJBException

:
java.lang.NullPoi
nterException
[java] at org.jboss.ejb3.tx.Ejb3TxPolicy.handleExceptionInOurTx(Ejb3TxP
olicy.java:63)
[java] at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:83)

[java] at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxIntercep
tor.java:191)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropag
ationInterceptor.java:76)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.stateful.StatefulInstanceInterceptor.invoke(St
atefulInstanceInterceptor.java:83)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.aspects.security.AuthenticationInterceptor.invoke(A
uthenticationInterceptor.java:77)
[java] at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(
Ejb3AuthenticationInterceptor.java:106)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagatio
nInterceptor.java:46)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(As
ynchronousInterceptor.java:106)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.stateful.StatefulContainer.dynamicInvoke(State
fulContainer.java:333)
[java] at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)
[java] at org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invok
e(AOPRemotingInvocationHandler.java:82)
[java] at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:73
4)
[java] at org.jboss.remoting.transport.socket.ServerThread.processInvoc
ation(ServerThread.java:560)
[java] at org.jboss.remoting.transport.socket.ServerThread.dorun(Server
Thread.java:369)
[java] at org.jboss.remoting.transport.socket.ServerThread.run(ServerTh
read.java:165)
[java] at org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemot
eClientInvoker.java:163)
[java] at org.jboss.remoting.Client.invoke(Client.java:1550)
[java] at org.jboss.remoting.Client.invoke(Client.java:530)
[java] at org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(Inv
okeRemoteInterceptor.java:62)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(Cl
ientTxPropagationInterceptor.java:61)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.aspects.security.SecurityClientInterceptor.invoke(S
ecurityClientInterceptor.java:53)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInte
rceptor.java:72)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.stateful.StatefulRemoteProxy.invoke(StatefulRe
moteProxy.java:135)
[java] at $Proxy1.checkout(Unknown Source)
[java] at org.jboss.tutorial.entity.client.Client.main(Client.java:44)
[java] at org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(Inv
okeRemoteInterceptor.java:74)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(Cl
ientTxPropagationInterceptor.java:61)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.aspects.security.SecurityClientInterceptor.invoke(S
ecurityClientInterceptor.java:53)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInte
rceptor.java:72)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.stateful.StatefulRemoteProxy.invoke(StatefulRe
moteProxy.java:135)
[java] at $Proxy1.checkout(Unknown Source)
[java] at org.jboss.tutorial.entity.client.Client.main(Client.java:44)
[java] Caused by: java.lang.NullPointerException

Source code of java.lang.NullPointerException

[java] at org.jboss.tutorial.entity.bean.ShoppingCartBean.checkout(Shop
pingCartBean.java:36)
[java] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[java] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAcces
sorImpl.java:39)
[java] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMet
hodAccessorImpl.java:25)
[java] at java.lang.reflect.Method

(Method.java:585)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:112)
[java] at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(Invo
cationContextImpl.java:166)
[java] at org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke
(EJB3InterceptorsInterceptor.java:63)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.entity.ExtendedPersistenceContextPropagationIn
terceptor.invoke(ExtendedPersistenceContextPropagationInterceptor.java:57)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.entity.TransactionScopedEntityManagerIntercept
or.invoke(TransactionScopedEntityManagerInterceptor.java:54)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOpe
rationsInterceptor.java:47)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:79)

[java] at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxIntercep
tor.java:191)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropag
ationInterceptor.java:76)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.stateful.StatefulInstanceInterceptor.invoke(St
atefulInstanceInterceptor.java:83)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.aspects.security.AuthenticationInterceptor.invoke(A
uthenticationInterceptor.java:77)
[java] at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(
Ejb3AuthenticationInterceptor.java:106)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagatio
nInterceptor.java:46)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(As
ynchronousInterceptor.java:106)
[java] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInv
ocation.java:101)
[java] at org.jboss.ejb3.stateful.StatefulContainer.dynamicInvoke(State
fulContainer.java:333)
[java] at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)
[java] at org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invok
e(AOPRemotingInvocationHandler.java:82)
[java] at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:73
4)
[java] at org.jboss.remoting.transport.socket.ServerThread.processInvoc
ation(ServerThread.java:560)
[java] at org.jboss.remoting.transport.socket.ServerThread.dorun(Server
Thread.java:369)
[java] at org.jboss.remoting.transport.socket.ServerThread.run(ServerTh
read.java:165)
[java] Java Result: 1

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