EntityManager.createQuery() ném NullPointerException

'm nhận NullPointerException mọi lúc EntityManager.createQuery() hoặc EntityManager.createNamedQuery() được gọi.EntityManager.createQuery() ném NullPointerException

Tôi đang sử dụng Glassfish 4.0, Hibernate 4.3.5 và EJB.

tôi có hệ thống phân cấp sau:

DaoTemplate nơi tôi có PersistenceContext và phương pháp chung

@Singleton 
public class DaoTemplate<T extends IdEntityInterface> { 
    @PersistenceContext(unitName = "pu_name") 
    protected EntityManager em; 
    .... 
}

Tóm tắt lớp với constructor beacuse đậu không thể mở rộng đậu khác.

public abstract class AbstractDaoTemplate<T extends IdEntityInterface> extends DaoTemplate<T> { 

    public AbstractDaoTemplate(Class<T> entityClass) { 
     super(entityClass); 
    } 

}

Và sau đó tôi có Dao.

@Singleton 
public class SomeDao extends AbstractDaoTemplate<SomeEntity> { 

    public SomeDao() { 
     super(SomeEntity.class) 
    }   

    @TransactionAttribute(TransactionAttributeType.REQUIRES_NEW) 
    public List<SomeEntity> someDaoMethod() { 
     ... 
     em.createQuery("SomeQuery"); 
     ... 
    } 
}

Khi someDaoMethod được gọi NullPointerException được ném vào phù hợp với em.createQuery("SomeQuery") nhưng em không phải là null.

Tôi cũng đã cố gắng để gọi em.createQuery("SomeQuery") từ cửa sổ gỡ lỗi, đây là kết quả:

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)

và 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>

Bất kỳ ý tưởng những gì có thể xảy ra?

Nguồn

2014-07-03 tvazac

Tôi đã tự tìm ra.

persistence.xml phải trông như thế này:

<?xml version="1.0" encoding="UTF-8"?> 
<persistence version="2.1" xmlns="http://xmlns.jcp.org/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_1.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"/> 
      <property name="hibernate.transaction.jta.platform"  value="org.hibernate.service.jta.platform.internal.SunOneJtaPlatform" /> 
     </properties> 
</persistence-unit> 
</persistence>

Nguồn

2014-07-03 16:17:55 tvazac

vĩ đại. Cảm ơn bạn. Bây giờ tôi có một ngoại lệ rõ ràng: 'org.hibernate.service.jndi.JndiException: Không thể tra cứu tên JNDI [java: appserver/TransactionManager]' – vault

Và giải pháp là ... JBoss nền tảng JTA cụ thể. '' – vault

Thêm giải pháp cho ** WebLogic ** để có nó ở một nơi : '' – AndrewMcCoist

EntityManager.createQuery() ném NullPointerException

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