I keep getting this error when trying to create a query. Have seen similar threads, but I think my setup looks correct. Any suggestions?

EJB Exception: : java.lang.NullPointerException
at org.hibernate.engine.transaction.internal.jta.JtaStatusHelper.getStatus(JtaStatusHelper.java:76)
at org.hibernate.engine.transaction.internal.jta.JtaStatusHelper.isActive(JtaStatusHelper.java:118)
at org.hibernate.engine.transaction.internal.jta.CMTTransaction.join(CMTTransaction.java:149)
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.joinTransaction(AbstractEntityManagerImpl.java:1602)
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.postInit(AbstractEntityManagerImpl.java:210)
at org.hibernate.jpa.internal.EntityManagerImpl.<init>(EntityManagerImpl.java:91)
at org.hibernate.jpa.internal.EntityManagerFactoryImpl.internalCreateEntityManager(EntityManagerFactoryImpl.java:345)
at org.hibernate.jpa.internal.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:313)
at weblogic.persistence.PersistenceContextWrapper.<init>(PersistenceContextWrapper.java:23)
at weblogic.persistence.TransactionalEntityManagerProxyImpl.newPersistenceContext(TransactionalEntityManagerProxyImpl.java:123)
at weblogic.persistence.TransactionalEntityManagerProxyImpl.getPersistenceContext(TransactionalEntityManagerProxyImpl.java:103)
at weblogic.persistence.BasePersistenceContextProxyImpl.invoke(BasePersistenceContextProxyImpl.java:105)
at weblogic.persistence.TransactionalEntityManagerProxyImpl.invoke(TransactionalEntityManagerProxyImpl.java:138)
at weblogic.persistence.BasePersistenceContextProxyImpl.invoke(BasePersistenceContextProxyImpl.java:91)
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Environment - Weblogic 12.1.3, Hibernate 4.3.11. My persistence file looks like this:

<persistence-unit name="HIF-BannerPU" transaction-type="JTA">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<jta-data-source>jdbc/HIF-Banner</jta-data-source>
<exclude-unlisted-classes>false</exclude-unlisted-classes>
<class>com.hsntech.hif.entity.Uctvmstr</class>
<class>com.hsntech.hif.entity.Uctvvals</class>
<properties>
<property name="hibernate.transaction.jta.platform" value="org.hibernate.service.jta.platform.internal.WeblogicJtaPlatform" />
<property name="hibernate.show_sql" value="true" />
<property name="hibernate.format_sql" value="true" />
<property name="hibernate.dialect" value="org.hibernate.dialect.Oracle10gDialect" />
</properties>
</persistence-unit>
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@Stateless
public class Testeaoimpl implements Testeao {
@PersistenceContext(unitName = "HIF-BannerPU")
private EntityManager em;
// *** exception thrown here
Query qry = em.createQuery("select m from Uctvmstr m");

I think you're getting that exception because Hibernate cannot locate the TM.

The configuration looks ok, so the only problem might be if your Weblogic doesn't expose the Transaction Manager under this JNDI name:



If that's so, you need to extend the default WeblogicJtaPlatform, override the methods that locate the TM and the UT and supply the new platform as a configuration proeprty.