NullPointerException in ContainerInterceptor.invokeHome for

[duder]

After successful deployment on jboss(3.0.0-CR1)-tomcat(...) of j2ee (1.3) application with one ejb (2.0) module and one web module I'm getting java.rmi.ServerException("null; nested exception is: java.lang.NullPointerException"), executing code like this :

...
user = userHome.findByPrimaryKey(new Integer(0));
...

where userHome is remote home interface for CMP entity bean, and code is invoked from web module.
I have not used any jboss specific customization (jboss.xml, jaws.xml, jbosscmp-jdbc.xml, etc.), but according to logs all CMP and EJB-QL related stuff was mapped properly. All CMP entities are configured with "unchecked" security flag and "Required" tranasaction attribute for all methods.

Any guess ?

Thanks a lot in advance.

Here is cut from server.log related to this matter.

<!-- Invocation Log Trace -->
TRACE [org.jboss.ejb.plugins.EntityInstancePool] Add instance org.jboss.ejb.plugins.EntityInstancePool@1fe666#org.jboss.ejb.EntityEnterpriseContext@499f7d
TRACE [org.jboss.ejb.plugins.LogInterceptor] Start method=findByPrimaryKey
TRACE [org.jboss.ejb.plugins.EntityInstancePool] Add instance org.jboss.ejb.plugins.EntityInstancePool@1fe666#org.jboss.ejb.EntityEnterpriseContext@5e155
TRACE [org.jboss.ejb.plugins.TxInterceptorCMT] Current transaction in MI is null
TRACE [org.jboss.ejb.plugins.EntityInstancePool] Add instance org.jboss.ejb.plugins.EntityInstancePool@1fe666#org.jboss.ejb.EntityEnterpriseContext@cd4db
TRACE [org.jboss.ejb.plugins.TxInterceptorCMT] TX_REQUIRED for findByPrimaryKey
TRACE [org.jboss.ejb.plugins.EntityInstancePool] Add instance org.jboss.ejb.plugins.EntityInstancePool@1fe666#org.jboss.ejb.EntityEnterpriseContext@6a8dbd
TRACE [org.jboss.ejb.plugins.TxInterceptorCMT] Thread came in with tx null
TRACE [org.jboss.ejb.plugins.EntityInstancePool] Add instance org.jboss.ejb.plugins.EntityInstancePool@1fe666#org.jboss.ejb.EntityEnterpriseContext@7f83a9
TRACE [org.jboss.ejb.plugins.TxInterceptorCMT] Starting new tx TransactionImpl:XidImpl [FormatId=257, GlobalId=IBM-THINK-PAD//1, BranchQual=]
TRACE [org.jboss.ejb.plugins.EntityInstancePool] Add instance org.jboss.ejb.plugins.EntityInstancePool@1fe666#org.jboss.ejb.EntityEnterpriseContext@1cfd7c
TRACE [org.jboss.ejb.plugins.EntityInstancePool] Get instance org.jboss.ejb.plugins.EntityInstancePool@1fe666#false#class com.alazarllc.cmm.common.ejb.provider.bean.NamedEntityBean
TRACE [org.jboss.ejb.plugins.EntityInstancePool] Add instance org.jboss.ejb.plugins.EntityInstancePool@1fe666#org.jboss.ejb.EntityEnterpriseContext@45d7f2
TRACE [org.jboss.ejb.plugins.TxInterceptorCMT] TxInterceptorCMT: In finally
TRACE [org.jboss.ejb.plugins.EntityInstancePool] Add instance org.jboss.ejb.plugins.EntityInstancePool@1fe666#org.jboss.ejb.EntityEnterpriseContext@1c15d2
TRACE [org.jboss.ejb.plugins.LogInterceptor] End method=findByPrimaryKey
..............................

<!-- Exception Stack Trace -->
INFO [STDOUT] java.lang.NullPointerException
INFO [STDOUT] at org.jboss.ejb.EntityContainer$ContainerInterceptor.invokeHome(EntityContainer.java:1107)
INFO [STDOUT] at org.jboss.ejb.plugins.AbstractInterceptor.invokeHome(AbstractInterceptor.java:73)
INFO [STDOUT] at org.jboss.ejb.plugins.EntitySynchronizationInterceptor.invokeHome(EntitySynchronizationInterceptor.java:230)
INFO [STDOUT] at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invokeHome(CachedConnectionInterceptor.java:176)
INFO [STDOUT] at org.jboss.ejb.plugins.EntityInstanceInterceptor.invokeHome(EntityInstanceInterceptor.java:134)
INFO [STDOUT] at org.jboss.ejb.plugins.EntityLockInterceptor.invokeHome(EntityLockInterceptor.java:79)
INFO [STDOUT] at org.jboss.ejb.plugins.EntityCreationInterceptor.invokeHome(EntityCreationInterceptor.java:44)
INFO [STDOUT] at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:98)
INFO [STDOUT] at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:167)
INFO [STDOUT] at org.jboss.ejb.plugins.TxInterceptorCMT.invokeHome(TxInterceptorCMT.java:52)
INFO [STDOUT] at org.jboss.ejb.plugins.SecurityInterceptor.invokeHome(SecurityInterceptor.java:104)
INFO [STDOUT] at org.jboss.ejb.plugins.LogInterceptor.invokeHome(LogInterceptor.java:109)
INFO [STDOUT] at org.jboss.ejb.EntityContainer.invokeHome(EntityContainer.java:487)
INFO [STDOUT] at org.jboss.ejb.Container.invoke(Container.java:727)
INFO [STDOUT] at org.jboss.ejb.EntityContainer.invoke(EntityContainer.java:1055)
INFO [STDOUT] at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:492)
INFO [STDOUT] at org.jboss.invocation.local.LocalInvoker.invoke(LocalInvoker.java:98)
INFO [STDOUT] at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:102)
INFO [STDOUT] at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:73)
INFO [STDOUT] at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:76)
INFO [STDOUT] at org.jboss.proxy.ejb.HomeInterceptor.invoke(HomeInterceptor.java:185)
INFO [STDOUT] at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:96)
INFO [STDOUT] at $Proxy156.findByPrimaryKey(Unknown Source)
..............................

[uglyhead69]

Sadly I don't have a solution to your problem, but I'm encountering the same thing. I'm trying to do a findByPrimaryKey and am ejb 2.0 entity bean from a servlet. It works from a regular client, but not a web client.

[uglyhead69]

OK, I'm back with some more info. I thought that maybe this problem had something to do with my misunderstanding of the new Local interface types in EJB 2.0. So I started up JBoss on a different machine, put the .war file on the new host and set it to look up the EJB on the remote (original) host. Things worked as they are supposed to. Which tells me that I need to study the EJB 2.0 spec a bit more. Anyhow. I'm going home for the day, but maybe I'll have better info tomorrow.

[duder]

I found some partial solution, which is part of another topic http://jboss.org/forums/thread.jsp?forum=46&thread=14157
Workaround I use is removing ejb related classes from .war files in case of deployment of the whole j2ee application the same app server. It works, but I still have another problems, but those are probably because of CMP.

[duder]

Here is official bug report
http://sourceforge.net/tracker/index.php?func=detail&aid=548668&group_id=22866&atid=376685

[mortena]

Can you please specify the link a bit more..Like what is the title of the bug. I can't find it from the link. It points to a start-site and not to the specific bug.