JPA NamedQuery不在Glassfish4中（但在Glassfish3中有效）

Question

我正在将使用带有JPA（EclipseLink）的EJB的应用程序从Glassfish3迁移到Glassfish4。 大部分服务器都在新服务器上运行，但是由于某种原因，这个命名查询（在JPQL语句中实例化一个对象）不起作用：

@NamedQuery(
    name = "countByUserType", 
    query = "SELECT new org.util.CountBean(ev.user.type, count(ev.user.id)) 
             FROM Event ev WHERE ev.idTs = :idTs GROUP BY ev.user.type"
)

我的CountBean类是一个简单的POJO类

public class CountBean{
    String label;
    Long count;
    public CountBean(String label, Long count) {
        this.label = label;
        this.count = count;
    }
}

我收到的错误消息如下：

 Caused by: Exception [EclipseLink-6168] (Eclipse Persistence Services - 2.5.0.v20130507-3faac2b): org.eclipse.persistence.exceptions.QueryException
 Exception Description: Query failed to prepare, unexpected error occurred: [java.lang.NullPointerException].
 Internal Exception: java.lang.NullPointerException
 Query: ReportQuery(name="countByUserType" referenceClass=Event jpql="SELECT new org.util.CountBean(ev.user.type, count(ev.user.idU), 0l) FROM Event ev WHERE ev.idTs = :idTs GROUP BY ev.user.type")
    at org.eclipse.persistence.exceptions.QueryException.prepareFailed(QueryException.java:1584)
    at org.eclipse.persistence.queries.DatabaseQuery.checkPrepare(DatabaseQuery.java:680)
    at org.eclipse.persistence.queries.ObjectLevelReadQuery.checkPrepare(ObjectLevelReadQuery.java:888)
    at org.eclipse.persistence.queries.DatabaseQuery.checkPrepare(DatabaseQuery.java:613)
    at org.eclipse.persistence.internal.jpa.QueryImpl.getDatabaseQueryInternal(QueryImpl.java:341)
    at org.eclipse.persistence.internal.jpa.EntityManagerImpl.createNamedQuery(EntityManagerImpl.java:1107)
    at com.sun.enterprise.container.common.impl.EntityManagerWrapper.createNamedQuery(EntityManagerWrapper.java:522)
    at org.un.sers.repository.EventFacade.countRoomsBooked(EventFacade.java:37)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    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:46)
    at sun.reflect.GeneratedMethodAccessor90.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    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.GeneratedMethodAccessor91.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    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)
    ... 35 more
 Caused by: java.lang.NullPointerException
    at org.eclipse.persistence.queries.ConstructorReportItem.initialize(ConstructorReportItem.java:167)
    at org.eclipse.persistence.queries.ReportQuery.prepare(ReportQuery.java:1058)
    at org.eclipse.persistence.queries.DatabaseQuery.checkPrepare(DatabaseQuery.java:661)
    ... 69 more

我很高兴从遇到过类似问题的人那里获得一些见解，或者我发布的代码中似乎有某些错误之处。 同样，当我在Glassfish 3上而不是Glassfish 4上部署应用程序并且它连接到的数据库是Oracle 11g时，此方法也有效。

Answer 1

这是旧版本的eclipselink中的错误 ，请检查以下内容：

• https://bugs.eclipse.org/bugs/show_bug.cgi?id=446861
• https://bugs.eclipse.org/bugs/show_bug.cgi?id=444561

---

解

解决该问题的更好方法是升级到最新版本2.7.1 最新版本

---

除了要使用Payara Server代替GlassFish 4 Server之外 ，还修复了许多错误，因为我对这台服务器有很好的经验，它现在的性能和性能比GlassFish更快。