JPA 查询语法问题还是什么？！ JPA SELECT NEW 语法问题？答案

【问题标题】：JPA query syntax issue or what ?! JPA SELECT NEW syntax issue?JPA 查询语法问题还是什么？！ JPA SELECT NEW 语法问题？
【发布时间】：2018-01-23 17:35:00
【问题描述】：

我有一个TextHistory 实体对象，然后我有这个 JPA 查询。

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

在实体对象中我已经提供了对应的构造函数。

我正在尝试在 Payara 4.1 下部署我的应用，但在部署时出现此异常：

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。我已经为此苦苦挣扎了几个小时。

有什么问题？有什么想法吗？

在 server.log 中我看到了这个异常。

        [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.          ]]

【问题讨论】：

由于在编译时它是一个内部 NPE，这听起来不仅仅是一个简单的用户错误。
@Kayaman 如果这么简单，根本原因或解决方案是什么？
您能检查一下 server.log 并将那里的例外情况添加到问题中吗？
@Mike Sure，已添加。
我没说这很简单。恰恰相反。

标签： java jpa entity payara

【解决方案1】：

关于您为什么要使用 SELECT NEW 语法的任何提示？此语法主要用于（极少数）您希望从一个实体中选择字段并使用这些字段的值构造一个不同对象的情况。

在您的情况下，您正在构建与您选择的实体完全相同的实体。这通常以select e from SomeEntity e 完成。（实际上，与 SQL 相比，在 JPQL 中，select 子句是可选的，只要您从单个实体中进行选择。所以from SomeEntity e 只选择整个表，from SomeEntity e where e <whatever> 选择所有 <whatever> 记录。）

如果实体有一些重量级的属性（如@Lobs）或@ManyToOne 关联，您最初不想加载，正确的做法是让它们延迟加载。对于 LOB，这是通过 @Basic(fetchType = LAZY) 完成的，对于关联是通过 @ManyToOne(fetchType = LAZY) 完成的。请注意，对于@ManyToMany 和@OneToMany，延迟加载无论如何都是默认设置。

我的印象是您正在尝试以“SQL 方式”执行 JPA。扎实的 SQL 知识是正确使用 JPA 的必要条件，但您需要始终从关系到面向对象的角度进行这种“范式转换”，以便按照应有的方式做事。

顺便说一句，关于

我什至不知道 Eclipselink 是什么

这几乎说明了一切 :-) JPA 是一个标准化的 Java API - 它定义了事情应该如何工作，不多也不少。它实际上并没有做真正的工作——这留给了特定的 JPA 实现，也就是持久性提供者。那里有很多 JPA 实现，最突出的是 Hibernate 和 Eclipselink。每个 Java EE 应用程序服务器都需要包含一个 JPA 持久性提供程序，并且您的服务器似乎带有 Eclipselink。当 Oracle 将名为 TopLink 的专有 JPA 实现捐赠给 Eclipse 基金会时，Eclipselink 应运而生。

更新：我做了更多的研究，看起来你的错误原因很普通：SELECT NEW 语法要求你使用构造函数的完全限定名称，即包括包裹名字。这是因为您可以select new 进入您想要的任何 POJO 类，它不需要该类是 JPA 实体。相比之下，from 子句使用简单的名称，因为那里只允许使用 @Entity 类（JPA 在部署时枚举和解析）。

为什么不使用完全限定名称会导致 Eclipselink 代码中出现 NullPointer，这是另一回事 - 似乎是 Eclipselink 中的一个错误。

==> 这导致了一个更好的问题，select new 或延迟加载。与往常一样，这取决于您的用例。无论对象如何进入内存，都将始终支持为延迟加载注释字段。例如，使用 EnitytManager.find() 总是返回一个完整的实体实例，使用不能在那里使用自定义构造函数。但是字段上的注释当然适用。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()，您将获得一个根据其注释初始化的B 实例。

使用select new 是一种一次性技术，以防您故意偏离默认设置。

【讨论】：

我必须纠正自己，可选的SELECT 子句是Hibernate 的“功能”（或错误，取决于您如何看待它），更准确地说是HQL - Hibernate 自己的查询语言。 JPQL 很大程度上基于 HQL，但并不相同。此特定功能在 JPQL 中未标准化，Eclipselink“碰巧”不支持它。

【解决方案2】：

不熟悉SELECT NEW这个语法，但是可以看出你在使用Eclipselink (http://wiki.eclipse.org/EclipseLink/Examples/JPA)

大约一年前，我遇到了一个问题，最终这似乎是一个 Eclipselink 错误。值得检查一下 (https://bugs.eclipse.org/bugs/query.cgi)，也许它是已知的，或者你刚刚找到它。

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

【讨论】：

谢谢，你能找到我更多的细节吗？比如链接什么的……
顺便说一句，我什至不知道 Eclipselink 是什么。我正在使用 Payara 以及与之捆绑的任何东西。它支持 JPA，我认为我的查询语法还可以。