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EJB local injection and transactions

Cristina Yenyxe
Greenhorn

Joined: May 04, 2010
Posts: 6
Hello,

I'm developing a JavaEE6 application, and I need to communicate two EJBs, one in the business tier and the other in the persistence tier. The persistence EJB doesn't deal with a model, it just queries a chaotic database running on SQL Server 2005, but I use an EntityManager so I don't have to worry about transactions anyway ;) So the code is something like this:

Bussiness EJB:

Persistence EJB (Local interface):

Persistence EJB (implementation):

I've checked it's not a problem with the connection between the EJBs adding a method with no persistence access and it works like a charm. And it shouldn't be a problem with the persistence unit configuracion 'cause when I turned the LogReader class into a @ManagedBean it also works.
But this way, when it gets to the 'em.createNamedQuery' statement it shows the following error: 'javax.ejb.EJBException: Unable to complete container-managed transaction.'

And the stack trace is:

Sorry for the stack trace's length, but I guess it is better for it to be too long than too short
Does somebody have any idea? Thanks in advance.
 
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