堆栈内存溢出
  繁体   English   中英

JPA查询语法问题还是什么？ JPA SELECT NEW语法问题？

[英]JPA query syntax issue or what ?! JPA SELECT NEW syntax issue?

 原文  2017-08-15 18:12:34  3   2    java/ jpa/ entity/ payara

问题描述

我有一个TextHistory实体对象，然后有这个JPA查询。

SELECT NEW TextHistory(i.id, i.fileName, i.importDate) FROM TextHistory i")

在实体对象中，我提供了相应的构造函数。

我正在尝试在Payara 4.1下部署我的应用程序，但在部署时遇到此异常： 

Error occurred during deployment: Exception while deploying the app    
[app-name] : Exception [EclipseLink-28019] 
(Eclipse Persistence Services - 2.6.2.qualifier):   
org.eclipse.persistence.exceptions.EntityManagerSetupException 
Exception Description:  
Deployment of PersistenceUnit [unit-name] failed. 
Close all factories for this PersistenceUnit. Internal Exception:  
Exception [EclipseLink-0] (Eclipse Persistence Services - 2.6.2.qualifier): 
org.eclipse.persistence.exceptions.JPQLException   
Exception Description: Internal problem encountered while compiling 
[SELECT NEW TextHistory(i.id, i.fileName, i.importDate) FROM TextHistory i].   
Internal Exception: java.lang.NullPointerException. 
Please see server.log for more details.

我认为我的JPA查询语法是正确的。 我已经为此奋斗了几个小时。

问题是什么？ 有任何想法吗？

在server.log中，我看到此异常。 

        [2017-08-15T21:32:24.546+0200] [Payara 4.1] [INFO] [] [org.eclipse.persistence.session./file:/D:/Work/TSSB_DEV_ENV_MASTER/domains/tssb_ms_gf4_domain_srm_tsbg/applications/tsbgam-application-2017-T3-SNAPSHOT/tsbgam-business_jar/_tsms_tsbg.connection] [tid: _ThreadID=154 _ThreadName=admin-listener(7)] [timeMillis: 1502825544546] [levelValue: 800] [[
          /file:/D:/Work/TSSB_DEV_ENV_MASTER/domains/tssb_ms_gf4_domain_srm_tsbg/applications/tsbgam-application-2017-T3-SNAPSHOT/tsbgam-business_jar/_tsms_tsbg logout successful]]

        [2017-08-15T21:32:24.546+0200] [Payara 4.1] [SEVERE] [] [org.eclipse.persistence.session./file:/D:/Work/TSSB_DEV_ENV_MASTER/domains/tssb_ms_gf4_domain_srm_tsbg/applications/tsbgam-application-2017-T3-SNAPSHOT/tsbgam-business_jar/_tsms_tsbg.ejb] [tid: _ThreadID=154 _ThreadName=admin-listener(7)] [timeMillis: 1502825544546] [levelValue: 1000] [[

        Local Exception Stack: 
        Exception [EclipseLink-0] (Eclipse Persistence Services - 2.6.2.qualifier): org.eclipse.persistence.exceptions.JPQLException
        Exception Description: Internal problem encountered while compiling [SELECT NEW TextHistory(i.id, i.fileName, i.importDate) FROM TextHistory i].
        Internal Exception: java.lang.NullPointerException
            at org.eclipse.persistence.internal.jpa.jpql.HermesParser.buildUnexpectedException(HermesParser.java:207)
            at org.eclipse.persistence.internal.jpa.jpql.HermesParser.populateQueryImp(HermesParser.java:296)
            at org.eclipse.persistence.internal.jpa.jpql.HermesParser.buildQuery(HermesParser.java:163)
            at org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:142)
            at org.eclipse.persistence.internal.jpa.JPAQuery.processJPQLQuery(JPAQuery.java:223)
            at org.eclipse.persistence.internal.jpa.JPAQuery.prepare(JPAQuery.java:184)
            at org.eclipse.persistence.queries.DatabaseQuery.prepareInternal(DatabaseQuery.java:624)
            at org.eclipse.persistence.internal.sessions.AbstractSession.processJPAQuery(AbstractSession.java:4366)
            at org.eclipse.persistence.internal.sessions.AbstractSession.processJPAQueries(AbstractSession.java:4326)
            at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:598)
            at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.postConnectDatasource(DatabaseSessionImpl.java:818)
            at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:762)
            at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:265)
            at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:731)
            at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getAbstractSession(EntityManagerFactoryDelegate.java:205)
            at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.createEntityManagerImpl(EntityManagerFactoryDelegate.java:305)
            at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:337)
            at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:303)
            at org.glassfish.persistence.jpa.JPADeployer$2.visitPUD(JPADeployer.java:451)
            at org.glassfish.persistence.jpa.JPADeployer$PersistenceUnitDescriptorIterator.iteratePUDs(JPADeployer.java:510)
            at org.glassfish.persistence.jpa.JPADeployer.iterateInitializedPUsAtApplicationPrepare(JPADeployer.java:492)
            at org.glassfish.persistence.jpa.JPADeployer.event(JPADeployer.java:395)
            at org.glassfish.kernel.event.EventsImpl.send(EventsImpl.java:131)
            at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:487)
            at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:219)
            at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:487)
            at com.sun.enterprise.v3.admin.CommandRunnerImpl$2$1.run(CommandRunnerImpl.java:539)
            at com.sun.enterprise.v3.admin.CommandRunnerImpl$2$1.run(CommandRunnerImpl.java:535)
            at java.security.AccessController.doPrivileged(Native Method)
            at javax.security.auth.Subject.doAs(Subject.java:360)
            at com.sun.enterprise.v3.admin.CommandRunnerImpl$2.execute(CommandRunnerImpl.java:534)
            at com.sun.enterprise.v3.admin.CommandRunnerImpl$3.run(CommandRunnerImpl.java:565)
            at com.sun.enterprise.v3.admin.CommandRunnerImpl$3.run(CommandRunnerImpl.java:557)
            at java.security.AccessController.doPrivileged(Native Method)
            at javax.security.auth.Subject.doAs(Subject.java:360)
            at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:556)
            at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1464)
            at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$1300(CommandRunnerImpl.java:109)
            at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1846)
            at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1722)
            at org.glassfish.admin.rest.utils.ResourceUtil.runCommand(ResourceUtil.java:253)
            at org.glassfish.admin.rest.utils.ResourceUtil.runCommand(ResourceUtil.java:231)
            at org.glassfish.admin.rest.utils.ResourceUtil.runCommand(ResourceUtil.java:275)
            at org.glassfish.admin.rest.resources.TemplateListOfResource.createResource(TemplateListOfResource.java:136)
            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:498)
            at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81)
            at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:144)
            at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:161)
            at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:160)
            at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:99)
            at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:389)
            at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:347)
            at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:102)
            at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:326)
            at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
            at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
            at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
            at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
            at org.glassfish.jersey.internal.Errors.process(Errors.java:267)
            at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317)
            at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:305)
            at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1154)
            at org.glassfish.jersey.grizzly2.httpserver.GrizzlyHttpContainer.service(GrizzlyHttpContainer.java:384)
            at org.glassfish.admin.rest.adapter.RestAdapter$2.service(RestAdapter.java:316)
            at org.glassfish.admin.rest.adapter.RestAdapter.service(RestAdapter.java:179)
            at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:459)
            at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:167)
            at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:206)
            at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:180)
            at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235)
            at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
            at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:283)
            at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:200)
            at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:132)
            at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:111)
            at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
            at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:536)
            at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
            at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117)
            at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56)
            at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137)
            at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:591)
            at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:571)
            at java.lang.Thread.run(Thread.java:745)
        Caused by: java.lang.NullPointerException
            at org.eclipse.persistence.queries.ReportQuery.beginAddingConstructorArguments(ReportQuery.java:558)
            at org.eclipse.persistence.internal.jpa.jpql.ReportItemBuilder.visit(ReportItemBuilder.java:263)
            at org.eclipse.persistence.jpa.jpql.parser.ConstructorExpression.accept(ConstructorExpression.java:84)
            at org.eclipse.persistence.internal.jpa.jpql.ReportItemBuilder.visitAbstractSelectClause(ReportItemBuilder.java:695)
            at org.eclipse.persistence.internal.jpa.jpql.ReportItemBuilder.visit(ReportItemBuilder.java:545)
            at org.eclipse.persistence.jpa.jpql.parser.SelectClause.accept(SelectClause.java:42)
            at org.eclipse.persistence.internal.jpa.jpql.ReportQueryVisitor.visitAbstractSelectClause(ReportQueryVisitor.java:82)
            at org.eclipse.persistence.internal.jpa.jpql.AbstractObjectLevelReadQueryVisitor.visit(AbstractObjectLevelReadQueryVisitor.java:173)
            at org.eclipse.persistence.jpa.jpql.parser.SelectClause.accept(SelectClause.java:42)
            at org.eclipse.persistence.internal.jpa.jpql.AbstractObjectLevelReadQueryVisitor.visitAbstractSelectStatement(AbstractObjectLevelReadQueryVisitor.java:327)
            at org.eclipse.persistence.internal.jpa.jpql.ReportQueryVisitor.visitAbstractSelectStatement(ReportQueryVisitor.java:92)
            at org.eclipse.persistence.internal.jpa.jpql.AbstractObjectLevelReadQueryVisitor.visit(AbstractObjectLevelReadQueryVisitor.java:183)
            at org.eclipse.persistence.jpa.jpql.parser.SelectStatement.accept(SelectStatement.java:101)
            at org.eclipse.persistence.internal.jpa.jpql.HermesParser$DatabaseQueryVisitor.visit(HermesParser.java:438)
            at org.eclipse.persistence.jpa.jpql.parser.SelectStatement.accept(SelectStatement.java:101)
            at org.eclipse.persistence.internal.jpa.jpql.HermesParser$DatabaseQueryVisitor.visit(HermesParser.java:418)
            at org.eclipse.persistence.jpa.jpql.parser.JPQLExpression.accept(JPQLExpression.java:135)
            at org.eclipse.persistence.internal.jpa.jpql.HermesParser.populateQueryImp(HermesParser.java:282)
            ... 85 more
        ]]

        [2017-08-15T21:32:24.548+0200] [Payara 4.1] [SEVERE] [] [javax.enterprise.system.core] [tid: _ThreadID=154 _ThreadName=admin-listener(7)] [timeMillis: 1502825544548] [levelValue: 1000] [[
          Exception while deploying the app [tsbgam-application-2017-T3-SNAPSHOT]]]

        [2017-08-15T21:32:24.548+0200] [Payara 4.1] [SEVERE] [NCLS-CORE-00026] [javax.enterprise.system.core] [tid: _ThreadID=154 _ThreadName=admin-listener(7)] [timeMillis: 1502825544548] [levelValue: 1000] [[
          Exception during lifecycle processing
        org.glassfish.deployment.common.DeploymentException: Exception [EclipseLink-28019] (Eclipse Persistence Services - 2.6.2.qualifier): org.eclipse.persistence.exceptions.EntityManagerSetupException
        Exception Description: Deployment of PersistenceUnit [tsms_tsbg] failed. Close all factories for this PersistenceUnit.
        Internal Exception: Exception [EclipseLink-0] (Eclipse Persistence Services - 2.6.2.qualifier): org.eclipse.persistence.exceptions.JPQLException
        Exception Description: Internal problem encountered while compiling [SELECT NEW TextHistory(i.id, i.fileName, i.importDate) FROM TextHistory i].
        Internal Exception: java.lang.NullPointerException
            at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.createDeployFailedPersistenceException(EntityManagerSetupImpl.java:869)
            at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:809)
            at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getAbstractSession(EntityManagerFactoryDelegate.java:205)
            at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.createEntityManagerImpl(EntityManagerFactoryDelegate.java:305)
            at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:337)
            at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:303)
            at org.glassfish.persistence.jpa.JPADeployer$2.visitPUD(JPADeployer.java:451)
            at org.glassfish.persistence.jpa.JPADeployer$PersistenceUnitDescriptorIterator.iteratePUDs(JPADeployer.java:510)
            at org.glassfish.persistence.jpa.JPADeployer.iterateInitializedPUsAtApplicationPrepare(JPADeployer.java:492)
            at org.glassfish.persistence.jpa.JPADeployer.event(JPADeployer.java:395)
            at org.glassfish.kernel.event.EventsImpl.send(EventsImpl.java:131)
            at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:487)
            at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:219)
            at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:487)
            at com.sun.enterprise.v3.admin.CommandRunnerImpl$2$1.run(CommandRunnerImpl.java:539)
            at com.sun.enterprise.v3.admin.CommandRunnerImpl$2$1.run(CommandRunnerImpl.java:535)
            at java.security.AccessController.doPrivileged(Native Method)
            at javax.security.auth.Subject.doAs(Subject.java:360)
            at com.sun.enterprise.v3.admin.CommandRunnerImpl$2.execute(CommandRunnerImpl.java:534)
            at com.sun.enterprise.v3.admin.CommandRunnerImpl$3.run(CommandRunnerImpl.java:565)
            at com.sun.enterprise.v3.admin.CommandRunnerImpl$3.run(CommandRunnerImpl.java:557)
            at java.security.AccessController.doPrivileged(Native Method)
            at javax.security.auth.Subject.doAs(Subject.java:360)
            at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:556)
            at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1464)
            at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$1300(CommandRunnerImpl.java:109)
            at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1846)
            at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1722)
            at org.glassfish.admin.rest.utils.ResourceUtil.runCommand(ResourceUtil.java:253)
            at org.glassfish.admin.rest.utils.ResourceUtil.runCommand(ResourceUtil.java:231)
            at org.glassfish.admin.rest.utils.ResourceUtil.runCommand(ResourceUtil.java:275)
            at org.glassfish.admin.rest.resources.TemplateListOfResource.createResource(TemplateListOfResource.java:136)
            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:498)
            at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81)
            at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:144)
            at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:161)
            at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:160)
            at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:99)
            at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:389)
            at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:347)
            at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:102)
            at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:326)
            at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
            at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
            at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
            at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
            at org.glassfish.jersey.internal.Errors.process(Errors.java:267)
            at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317)
            at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:305)
            at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1154)
            at org.glassfish.jersey.grizzly2.httpserver.GrizzlyHttpContainer.service(GrizzlyHttpContainer.java:384)
            at org.glassfish.admin.rest.adapter.RestAdapter$2.service(RestAdapter.java:316)
            at org.glassfish.admin.rest.adapter.RestAdapter.service(RestAdapter.java:179)
            at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:459)
            at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:167)
            at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:206)
            at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:180)
            at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235)
            at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
            at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:283)
            at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:200)
            at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:132)
            at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:111)
            at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
            at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:536)
            at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
            at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117)
            at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56)
            at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137)
            at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:591)
            at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:571)
            at java.lang.Thread.run(Thread.java:745)
        ]]

        [2017-08-15T21:32:24.562+0200] [Payara 4.1] [SEVERE] [] [javax.enterprise.system.core] [tid: _ThreadID=154 _ThreadName=admin-listener(7)] [timeMillis: 1502825544562] [levelValue: 1000] [[
          Exception while deploying the app [tsbgam-application-2017-T3-SNAPSHOT] : Exception [EclipseLink-28019] (Eclipse Persistence Services - 2.6.2.qualifier): org.eclipse.persistence.exceptions.EntityManagerSetupException
        Exception Description: Deployment of PersistenceUnit [tsms_tsbg] failed. Close all factories for this PersistenceUnit.
        Internal Exception: Exception [EclipseLink-0] (Eclipse Persistence Services - 2.6.2.qualifier): org.eclipse.persistence.exceptions.JPQLException
        Exception Description: Internal problem encountered while compiling [SELECT NEW TextHistory(i.id, i.fileName, i.importDate) FROM TextHistory i].
        Internal Exception: java.lang.NullPointerException]]

        [2017-08-15T21:32:24.663+0200] [Payara 4.1] [INFO] [] [org.glassfish.admingui] [tid: _ThreadID=47 _ThreadName=admin-listener(5)] [timeMillis: 1502825544663] [levelValue: 800] [[
          Exception Occurred :Error occurred during deployment: Exception while deploying the app [tsbgam-application-2017-T3-SNAPSHOT] : Exception [EclipseLink-28019] (Eclipse Persistence Services - 2.6.2.qualifier): org.eclipse.persistence.exceptions.EntityManagerSetupException
        Exception Description: Deployment of PersistenceUnit [tsms_tsbg] failed. Close all factories for this PersistenceUnit.
        Internal Exception: Exception [EclipseLink-0] (Eclipse Persistence Services - 2.6.2.qualifier): org.eclipse.persistence.exceptions.JPQLException
        Exception Description: Internal problem encountered while compiling [SELECT NEW TextHistory(i.id, i.fileName, i.importDate) FROM TextHistory i].
        Internal Exception: java.lang.NullPointerException. Please see server.log for more details.          ]]

2 个解决方案

解决方案1
 3  2017-08-15 20:08:41

关于您实际上为什么要使用SELECT NEW语法的任何提示？ 这种语法通常用于（罕见的）情况下，您想从一个实体中选择字段并使用这些字段的值构造另一个对象。

在您的情况下，您将构建从中选择的同一实体。 通常这是通过select e from SomeEntity e完成的。 （实际上，与SQL相反，在JPQL中，只要从单个实体中进行选择， select子句是可选的。因此， from SomeEntity e仅选择整个表， from SomeEntity e where e <whatever>选择from SomeEntity e where e <whatever>选择所有<whatever>记录。）

如果实体具有一些重量级属性（例如@Lob ）或@ManyToOne关联，而您不想一开始就对其进行加载，则执行此操作的正确方法是使它们延迟加载。 对于LOB，这通过@Basic(fetchType = LAZY) ，对于关联，则通过@ManyToOne(fetchType = LAZY) 。 请注意，对于@ManyToMany和@OneToMany延迟加载始终是默认设置。

我的印象是您正在尝试以“ SQL方式”进行JPA。 扎实的SQL知识对于正确使用JPA是必不可少的，但是您必须始终从关系到面向对象的角度进行这种“范式转换”，以便按照预期的方式进行操作。

BTW，关于

我什至不知道什么是Eclipselink

这几乎说明了一切：-) JPA是一种标准化的Java API-它定义了事情应该如何工作，没有更多，也不少。 它实际上并没有做真正的工作-这留给了特定的JPA实现，也就是持久性提供程序。 有很多JPA实现，最突出的是Hibernate和Eclipselink。 每个Java EE应用程序服务器都必须包含JPA持久性提供程序，并且看来您的服务器随附Eclipselink。 当Oracle将其专有的名为TopLink的JPA实现捐赠给Eclipse Foundation时，Eclipselink便应运而生。

更新：我做了更多的研究，看来您出错的原因很平凡： SELECT NEW语法要求您使用构造函数的完全合格名称，即包括程序包名称。 这是因为您可以在想要的任何POJO类中select new ，而不要求该类是JPA实体。 相反， from子句使用简单名称，因为那里仅允许@Entity类（JPA在部署时枚举和解析）。

为什么不使用完全限定的名称会导致Eclipselink代码中出现NullPointer，这是另一个故事-似乎像Eclipselink中的错误。

==>这会导致一个问题，那就是哪个更好， select new加载还是延迟加载。 与往常一样，这取决于您的用例。 无论对象如何进入内存，为延迟加载的字段添加注释将始终受到重视。 例如，使用EnitytManager.find（）总是返回实体的完整实例，而不能在其中使用自定义构造函数。 但是，当然可以使用对字段的注释。 通过关联访问实体时也是如此-如果A包含对B的引用，并且您调用A.getB()则会根据其注释初始化B的实例。

如果您故意要偏离默认值，则使用select new是一项一次性技术。

解决方案2
 0  2017-08-15 18:18:39

不熟悉这种SELECT NEW语法，但是可以看到您正在使用Eclipselink（ http://wiki.eclipse.org/EclipseLink/Examples/JPA ）

大约一年前，我陷入了一个问题，到最后，它似乎是一个Eclipselink错误。 值得检查一下（ https://bugs.eclipse.org/bugs/query.cgi ），也许它是已知的，或者您只是发现了它。

另一个猜测： org.eclipse.persistence.exceptions.EntityManagerSetupException可能导致EntityManager的设置不正确。

暂无
暂无

声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.

相关问题 Spring Data JPA中的查询语法问题 JPA查询语法错误 JPA查询中的语法错误 Spring Data Jpa选择新问题 JPA JOIN查询问题 JPA查询问题 JPA更新查询问题 JPA命名查询问题 JPA查询选择新 JPA使用IdClass问题删除查询
相关标签
 
粤ICP备18138465号  © 2020-2024 STACKOOM.COM