EntityManager.createQuery() throws NullPointerException

'm getting NullPointerException everytime any `EntityManager.createQuery()` or `EntityManager.createNamedQuery()` is called. I'm using Glassfish 4.0, Hibernate 4.3.5 and EJB. I have following hierarchy: DaoTemplate where I have PersistenceContext and generic methods ``` @Singleton public class DaoTemplate<T extends IdEntityInterface> { @PersistenceContext(unitName = "pu_name") protected EntityManager em; .... } ``` Abstract class with constructor beacuse bean can't extend another bean. ``` public abstract class AbstractDaoTemplate<T extends IdEntityInterface> extends DaoTemplate<T> { public AbstractDaoTemplate(Class<T> entityClass) { super(entityClass); } } ``` And then I have Dao. ``` @Singleton public class SomeDao extends AbstractDaoTemplate<SomeEntity> { public SomeDao() { super(SomeEntity.class) } @TransactionAttribute(TransactionAttributeType.REQUIRES_NEW) public List<SomeEntity> someDaoMethod() { ... em.createQuery("SomeQuery"); ... } } ``` When someDaoMethod is invoked NullPointerException is thrown on line with `em.createQuery("SomeQuery")` but `em` is not null. I've also tried to call `em.createQuery("SomeQuery")` from debugger window, here is the output: ``` Exception occurred in target VM: 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:338) at com.sun.enterprise.container.common.impl.EntityManagerWrapper._getDelegate(EntityManagerWrapper.java:197) at com.sun.enterprise.container.common.impl.EntityManagerWrapper.createQuery(EntityManagerWrapper.java:455) at eu.comcom.kweportal.dao.ShipmentDao.getActiveOldShipments(ShipmentDao.java:196) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1081) at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1153) at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:4695) at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:630) at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822) at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:582) at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke(Abstrac tEJBRequestScopeActivationInterceptor.java:46) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:883) at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822) at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:582) at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doCall(SystemInterceptorProxy.java:163) at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:140) at sun.reflect.GeneratedMethodAccessor77.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:883) at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822) at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:369) at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:4667) at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:4655) at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:212) at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLoca lObjectInvocationHandlerDelegate.java:88) at com.sun.proxy.$Proxy542.getActiveOldShipments(Unknown Source) at eu.comcom.kweportal.dao.__EJB31_Generated__ShipmentDao__Intf____Bean__.getActiveOldShipments(Unknown Source) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.jboss.weld.util.reflection.Reflections.invokeAndUnwrap(Reflections.java:396) at org.jboss.weld.bean.proxy.EnterpriseBeanProxyMethodHandler.invoke(EnterpriseBeanProxyMethodHandler.java:108) at org.jboss.weld.bean.proxy.EnterpriseTargetBeanInstance.invoke(EnterpriseTargetBeanInstance.java:56) at org.jboss.weld.bean.proxy.InjectionPointPropagatingEnterpriseTargetBeanInstance.invoke(InjectionPointPropagatingEnterpriseTargetBeanInstance.java:63) at org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:101) at eu.comcom.kweportal.dao.ShipmentDao$Proxy$_$$_Weld$EnterpriseProxy$.getActiveOldShipments(Unknown Source) at eu.comcom.kweportal.schedule.ActualTimeScheduler.updatePastMilestonesTimes(ActualTimeScheduler.java:41) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1081) at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1153) at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:4695) at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:630) at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822) at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:582) at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke (AbstractEJBRequestScopeActivationInterceptor.java:55) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:883) at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822) at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:582) at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doCall(SystemInterceptorProxy.java:163) at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundTimeout(SystemInterceptorProxy.java:145) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:883) at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822) at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:369) at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:4667) at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:4655) at com.sun.ejb.containers.BaseContainer.callEJBTimeout(BaseContainer.java:3993) at com.sun.ejb.containers.EJBTimerService.deliverTimeout(EJBTimerService.java:1199) at com.sun.ejb.containers.EJBTimerService.access$000(EJBTimerService.java:89) at com.sun.ejb.containers.EJBTimerService$TaskExpiredWork.run(EJBTimerService.java:1919) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:744) ``` and persistence.xml: ``` <?xml version="1.0" encoding="UTF-8"?> <persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"> <persistence-unit name="pu_name" transaction-type="JTA"> <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider> <jta-data-source>jdbc/kweportal</jta-data-source> <exclude-unlisted-classes>false</exclude-unlisted-classes> <properties> <property name="hibernate.ejb.cfgfile" value="hibernate.cfg.xml"/> </properties> </persistence-unit> </persistence> ``` Any ideas what could be wrong?