JPA 没有按预期工作，即使它看起来是一个简单的 JPQL 调用
JPA not working as expected even though it seems a simple JPQL call
JPA 没有按预期工作，即使它看起来是一个简单的 JPQL 调用：
SELECT e FROM Employee e
...但是，得到这个异常（从 GET 操作后的系统日志）...
注意 EL 警告："Model classes may not have been found during entity search"...
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[EL Info]: 2018-09-19 12:21:37.142--ServerSession(301360221)--Thread(Thread[http-nio-8080-exec-1,5,main])--/file:/usr/local/apache-tomee-plume-7.0.5/webapps/MyRestSvc/WEB-INF/classes/_DB2JPA login successful
[EL Warning]: 2018-09-19 12:21:37.144--ServerSession(301360221)--Thread(Thread[http-nio-8080-exec-1,5,main])--Problem while registering MBean: java.lang.NullPointerException
[EL Warning]: 2018-09-19 12:21:37.156--Thread(Thread[http-nio-8080-exec-1,5,main])--The collection of metamodel types is empty. Model classes may not have been found during entity search for Java SE and some Java EE container managed persistence units. Please verify that your entity classes are referenced in persistence.xml using either <class> elements or a global <exclude-unlisted-classes>false</exclude-unlisted-classes> element
java.lang.IllegalArgumentException: An exception occurred while creating a query in EntityManager:
Exception Description: Problem compiling [SELECT e FROM Employee e].
[14, 22] The abstract schema type 'Employee' is unknown.
at org.eclipse.persistence.internal.jpa.EntityManagerImpl.createQuery(EntityManagerImpl.java:1743)
at org.eclipse.persistence.internal.jpa.EntityManagerImpl.createQuery(EntityManagerImpl.java:1764)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.apache.openejb.persistence.JtaEntityManager.createQuery(JtaEntityManager.java:387)
at org.apache.openejb.persistence.JtaEntityManager.typedProxyIfNoTx(JtaEntityManager.java:382)
at org.apache.openejb.persistence.JtaEntityManager.createQuery(JtaEntityManager.java:454)
at aaa.bbb.ccc.war.MyRestSvc.get(MyRestSvc.java:42)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
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任何 ideas/suggestions 帮助解决此问题的人将不胜感激。想知道是否与 EclipseLink 版本 2.7.1 不兼容，以及模型 类 是如何通过 Eclipse (photon) ide.
生成的
我正在使用与 db2express-c 捆绑在一起的 db2sampl 数据库...
这里是tomee.xml声明资源...
<?xml version="1.0" encoding="UTF-8"?>
<tomee>
<Resource id="jdbc/sample" type="javax.sql.DataSource">
driverClassName com.ibm.db2.jcc.DB2Driver
jdbcDriverType 4
url jdbc:db2://localhost:50000/SAMPLE
username db2inst1
password db2inst1-pwd
</Resource>
</tomee>
这里是persistence.xml...
<?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://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
<persistence-unit name="DB2JPA">
<jta-data-source>jdbc/SAMPLE</jta-data-source>
<class>aaa.bbb.ccc.model.Department</class>
<class>aaa.bbb.ccc.model.Employee</class>
<class>aaa.bbb.ccc.model.Staff</class>
<exclude-unlisted-classes>false</exclude-unlisted-classes>
<properties>
<property name="eclipselink.logging.level" value="FINE" />
</properties>
</persistence-unit>
</persistence>
这是模型类（使用Eclipse创建：从表生成的实体）...
Employee.java...
package aaa.bbb.ccc.model;
import java.io.Serializable;
import javax.persistence.*;
import java.math.BigDecimal;
import java.util.Date;
import java.util.List;
/**
* The persistent class for the EMPLOYEE database table.
*
*/
@Entity
@Table(name="EMPLOYEE")
@NamedQuery(name="Employee.findAll", query="SELECT e FROM Employee e")
public class Employee implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@Column(unique=true, nullable=false, length=6)
private String empno;
@Temporal(TemporalType.DATE)
private Date birthdate;
@Column(precision=9, scale=2)
private BigDecimal bonus;
@Column(name="\"COMM\"", precision=9, scale=2)
private BigDecimal comm;
@Column(nullable=false)
private short edlevel;
@Column(nullable=false, length=12)
private String firstnme;
@Temporal(TemporalType.DATE)
private Date hiredate;
@Column(length=8)
private String job;
@Column(nullable=false, length=15)
private String lastname;
@Column(length=1)
private String midinit;
@Column(length=4)
private String phoneno;
@Column(precision=9, scale=2)
private BigDecimal salary;
@Column(length=1)
private String sex;
//bi-directional many-to-one association to Department
@OneToMany(mappedBy="employee")
private List<Department> departments;
//bi-directional many-to-one association to Department
@ManyToOne
@JoinColumn(name="WORKDEPT")
private Department department;
public Employee() {
}
public String getEmpno() {
return this.empno;
}
public void setEmpno(String empno) {
this.empno = empno;
}
public Date getBirthdate() {
return this.birthdate;
}
public void setBirthdate(Date birthdate) {
this.birthdate = birthdate;
}
public BigDecimal getBonus() {
return this.bonus;
}
public void setBonus(BigDecimal bonus) {
this.bonus = bonus;
}
public BigDecimal getComm() {
return this.comm;
}
public void setComm(BigDecimal comm) {
this.comm = comm;
}
public short getEdlevel() {
return this.edlevel;
}
public void setEdlevel(short edlevel) {
this.edlevel = edlevel;
}
public String getFirstnme() {
return this.firstnme;
}
public void setFirstnme(String firstnme) {
this.firstnme = firstnme;
}
public Date getHiredate() {
return this.hiredate;
}
public void setHiredate(Date hiredate) {
this.hiredate = hiredate;
}
public String getJob() {
return this.job;
}
public void setJob(String job) {
this.job = job;
}
public String getLastname() {
return this.lastname;
}
public void setLastname(String lastname) {
this.lastname = lastname;
}
public String getMidinit() {
return this.midinit;
}
public void setMidinit(String midinit) {
this.midinit = midinit;
}
public String getPhoneno() {
return this.phoneno;
}
public void setPhoneno(String phoneno) {
this.phoneno = phoneno;
}
public BigDecimal getSalary() {
return this.salary;
}
public void setSalary(BigDecimal salary) {
this.salary = salary;
}
public String getSex() {
return this.sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public List<Department> getDepartments() {
return this.departments;
}
public void setDepartments(List<Department> departments) {
this.departments = departments;
}
public Department addDepartment(Department department) {
getDepartments().add(department);
department.setEmployee(this);
return department;
}
public Department removeDepartment(Department department) {
getDepartments().remove(department);
department.setEmployee(null);
return department;
}
public Department getDepartment() {
return this.department;
}
public void setDepartment(Department department) {
this.department = department;
}
}
Department.java...
(removed for space - can provide on request)
Staff.java...
(removed for space - can provide on request)
这是 REST 服务 - 只是一个 GET 方法（为简单起见）...
package aaa.bbb.ccc.war;
import java.util.List;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.UriInfo;
import aaa.bbb.ccc.model.Employee;
@Stateless
@Path("/employeeList")
public class MyRestSvc {
@PersistenceContext(unitName = "DB2JPA")
EntityManager em;
@Context
UriInfo uriInfo;
public MyRestSvc() {
}
@GET
@Produces({ MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML })
public List<Employee> get(@Context javax.servlet.http.HttpServletRequest request) {
em.getEntityManagerFactory().getCache().evictAll(); // Invalidate all objects in the cache
List<Employee> eList = null;
try {
eList = em.createQuery("SELECT e FROM Employee e").getResultList();
} catch (Exception e) {
e.printStackTrace();
throw e;
}
return eList;
}
}
这是Tomee启动的日志...
(removed for space - can provide on request)
这里是系统日志ouput/reaction到GET操作...
[EL Info]: 2018-09-19 07:05:43.756--ServerSession(174651846)--Thread(Thread[http-nio-8080-exec-1,5,main])--EclipseLink, version: Eclipse Persistence Services - 2.7.1.v20171221-bd47e8f
[EL Fine]: 2018-09-19 07:05:43.765--Thread(Thread[http-nio-8080-exec-1,5,main])--Detected database platform: org.eclipse.persistence.platform.database.DB2Platform
[EL Config]: 2018-09-19 07:05:43.777--ServerSession(174651846)--Connection(393909340)--Thread(Thread[http-nio-8080-exec-1,5,main])--connecting(DatabaseLogin(
platform=>DatabasePlatform
user name=> ""
connector=>JNDIConnector datasource name=>null
))
[EL Config]: 2018-09-19 07:05:43.778--ServerSession(174651846)--Connection(935474207)--Thread(Thread[http-nio-8080-exec-1,5,main])--Connected: jdbc:db2://localhost:50000/SAMPLE
User: db2inst1
Database: DB2/LINUXX8664 Version: SQL10055
Driver: IBM Data Server Driver for JDBC and SQLJ Version: 4.21.29
[EL Config]: 2018-09-19 07:05:43.778--ServerSession(174651846)--Connection(247275895)--Thread(Thread[http-nio-8080-exec-1,5,main])--connecting(DatabaseLogin(
platform=>DB2Platform
user name=> ""
connector=>JNDIConnector datasource name=>null
))
[EL Config]: 2018-09-19 07:05:43.791--ServerSession(174651846)--Connection(1852461265)--Thread(Thread[http-nio-8080-exec-1,5,main])--Connected: jdbc:db2://localhost:50000/SAMPLE
User: db2inst1
Database: DB2/LINUXX8664 Version: SQL10055
Driver: IBM Data Server Driver for JDBC and SQLJ Version: 4.21.29
[EL Info]: 2018-09-19 07:05:43.796--ServerSession(174651846)--Thread(Thread[http-nio-8080-exec-1,5,main])--/file:/usr/local/apache-tomee-plume-7.0.5/webapps/MyRestSvc/WEB-INF/classes/_DB2JPA login successful
[EL Warning]: 2018-09-19 07:05:43.799--ServerSession(174651846)--Thread(Thread[http-nio-8080-exec-1,5,main])--Problem while registering MBean: java.lang.NullPointerException
[EL Warning]: 2018-09-19 07:05:43.806--Thread(Thread[http-nio-8080-exec-1,5,main])--The collection of metamodel types is empty. Model classes may not have been found during entity search for Java SE and some Java EE container managed persistence units. Please verify that your entity classes are referenced in persistence.xml using either <class> elements or a global <exclude-unlisted-classes>false</exclude-unlisted-classes> element
java.lang.IllegalArgumentException: An exception occurred while creating a query in EntityManager:
Exception Description: Problem compiling [SELECT e FROM Employee e].
[14, 22] The abstract schema type 'Employee' is unknown.
at org.eclipse.persistence.internal.jpa.EntityManagerImpl.createQuery(EntityManagerImpl.java:1743)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.apache.openejb.persistence.JtaEntityManager.createQuery(JtaEntityManager.java:387)
at org.apache.openejb.persistence.JtaEntityManager.proxyIfNoTx(JtaEntityManager.java:375)
at org.apache.openejb.persistence.JtaEntityManager.createQuery(JtaEntityManager.java:329)
at aaa.bbb.ccc.war.MyRestSvc.get(MyRestSvc.java:40)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.apache.openejb.core.interceptor.ReflectionInvocationContext$Invocation.invoke(ReflectionInvocationContext.java:205)
at org.apache.openejb.core.interceptor.ReflectionInvocationContext.proceed(ReflectionInvocationContext.java:186)
at org.apache.openejb.monitoring.StatsInterceptor.record(StatsInterceptor.java:191)
at org.apache.openejb.monitoring.StatsInterceptor.invoke(StatsInterceptor.java:102)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.apache.openejb.core.interceptor.ReflectionInvocationContext$Invocation.invoke(ReflectionInvocationContext.java:205)
at org.apache.openejb.core.interceptor.ReflectionInvocationContext.proceed(ReflectionInvocationContext.java:186)
at org.apache.openejb.core.interceptor.InterceptorStack.invoke(InterceptorStack.java:85)
at org.apache.openejb.core.stateless.StatelessContainer._invoke(StatelessContainer.java:252)
at org.apache.openejb.core.stateless.StatelessContainer.invoke(StatelessContainer.java:212)
at org.apache.openejb.util.proxy.ProxyEJB$Handler.invoke(ProxyEJB.java:74)
at aaa.bbb.ccc.war.MyRestSvc$$LocalBeanProxy.get(aaa/bbb/ccc/war/MyRestSvc.java)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.apache.openejb.server.cxf.rs.OpenEJBEJBInvoker.performInvocation(OpenEJBEJBInvoker.java:95)
at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:96)
at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:191)
at org.apache.openejb.server.cxf.rs.OpenEJBEJBInvoker.invoke(OpenEJBEJBInvoker.java:68)
at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:101)
at org.apache.openejb.server.cxf.rs.AutoJAXRSInvoker.invoke(AutoJAXRSInvoker.java:64)
at org.apache.cxf.interceptor.ServiceInvokerInterceptor.run(ServiceInvokerInterceptor.java:59)
at org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:96)
at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:308)
at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:121)
at org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:267)
at org.apache.openejb.server.cxf.rs.CxfRsHttpListener.doInvoke(CxfRsHttpListener.java:253)
at org.apache.tomee.webservices.CXFJAXRSFilter.doFilter(CXFJAXRSFilter.java:94)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.openejb.server.httpd.EEFilter.doFilter(EEFilter.java:65)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.tomee.catalina.OpenEJBValve.invoke(OpenEJBValve.java:44)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
at org.apache.tomee.catalina.OpenEJBSecurityListener$RequestCapturer.invoke(OpenEJBSecurityListener.java:97)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:800)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:800)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1471)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:844)
Caused by: Exception [EclipseLink-0] (Eclipse Persistence Services - 2.7.1.v20171221-bd47e8f): org.eclipse.persistence.exceptions.JPQLException
Exception Description: Problem compiling [SELECT e FROM Employee e].
[14, 22] The abstract schema type 'Employee' is unknown.
at org.eclipse.persistence.internal.jpa.jpql.HermesParser.buildException(HermesParser.java:155)
at org.eclipse.persistence.internal.jpa.jpql.HermesParser.validate(HermesParser.java:347)
at org.eclipse.persistence.internal.jpa.jpql.HermesParser.populateQueryImp(HermesParser.java:278)
at org.eclipse.persistence.internal.jpa.jpql.HermesParser.buildQuery(HermesParser.java:163)
at org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:140)
at org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:116)
at org.eclipse.persistence.internal.jpa.EJBQueryImpl.<init>(EJBQueryImpl.java:102)
at org.eclipse.persistence.internal.jpa.EJBQueryImpl.<init>(EJBQueryImpl.java:86)
at org.eclipse.persistence.internal.jpa.EntityManagerImpl.createQuery(EntityManagerImpl.java:1741)
... 71 more
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pom.xml...
(removed for space - can provide on request)
环境信息...
java 10
EclipseLink (2.7.1)
Dockerized Db2express-c
apache-tomee-7.0.5-plume
似乎与 EclipseLink 2.7.1 不兼容，不知何故。当我改为使用 EclipseLink 2.7.2 时，问题就消失了。感谢大家的意见，建议。
我从这篇帖子中得到了提示：
https://www.eclipse.org/forums/index.php/t/1092642/
引用了这个错误：
https://bugs.eclipse.org/bugs/show_bug.cgi?id=532882
<!--does not work...
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>eclipselink</artifactId>
<version>2.7.1</version>
</dependency>
-->
<!-- works as expected...-->
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>eclipselink</artifactId>
<version>2.7.2</version>
</dependency>
JPA 没有按预期工作，即使它看起来是一个简单的 JPQL 调用：
SELECT e FROM Employee e
...但是，得到这个异常（从 GET 操作后的系统日志）...
注意 EL 警告："Model classes may not have been found during entity search"...
-
-
-
[EL Info]: 2018-09-19 12:21:37.142--ServerSession(301360221)--Thread(Thread[http-nio-8080-exec-1,5,main])--/file:/usr/local/apache-tomee-plume-7.0.5/webapps/MyRestSvc/WEB-INF/classes/_DB2JPA login successful
[EL Warning]: 2018-09-19 12:21:37.144--ServerSession(301360221)--Thread(Thread[http-nio-8080-exec-1,5,main])--Problem while registering MBean: java.lang.NullPointerException
[EL Warning]: 2018-09-19 12:21:37.156--Thread(Thread[http-nio-8080-exec-1,5,main])--The collection of metamodel types is empty. Model classes may not have been found during entity search for Java SE and some Java EE container managed persistence units. Please verify that your entity classes are referenced in persistence.xml using either <class> elements or a global <exclude-unlisted-classes>false</exclude-unlisted-classes> element
java.lang.IllegalArgumentException: An exception occurred while creating a query in EntityManager:
Exception Description: Problem compiling [SELECT e FROM Employee e].
[14, 22] The abstract schema type 'Employee' is unknown.
at org.eclipse.persistence.internal.jpa.EntityManagerImpl.createQuery(EntityManagerImpl.java:1743)
at org.eclipse.persistence.internal.jpa.EntityManagerImpl.createQuery(EntityManagerImpl.java:1764)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.apache.openejb.persistence.JtaEntityManager.createQuery(JtaEntityManager.java:387)
at org.apache.openejb.persistence.JtaEntityManager.typedProxyIfNoTx(JtaEntityManager.java:382)
at org.apache.openejb.persistence.JtaEntityManager.createQuery(JtaEntityManager.java:454)
at aaa.bbb.ccc.war.MyRestSvc.get(MyRestSvc.java:42)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
-
-
-
任何 ideas/suggestions 帮助解决此问题的人将不胜感激。想知道是否与 EclipseLink 版本 2.7.1 不兼容，以及模型 类 是如何通过 Eclipse (photon) ide.
生成的我正在使用与 db2express-c 捆绑在一起的 db2sampl 数据库...
这里是tomee.xml声明资源...
<?xml version="1.0" encoding="UTF-8"?>
<tomee>
<Resource id="jdbc/sample" type="javax.sql.DataSource">
driverClassName com.ibm.db2.jcc.DB2Driver
jdbcDriverType 4
url jdbc:db2://localhost:50000/SAMPLE
username db2inst1
password db2inst1-pwd
</Resource>
</tomee>
这里是persistence.xml...
<?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://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
<persistence-unit name="DB2JPA">
<jta-data-source>jdbc/SAMPLE</jta-data-source>
<class>aaa.bbb.ccc.model.Department</class>
<class>aaa.bbb.ccc.model.Employee</class>
<class>aaa.bbb.ccc.model.Staff</class>
<exclude-unlisted-classes>false</exclude-unlisted-classes>
<properties>
<property name="eclipselink.logging.level" value="FINE" />
</properties>
</persistence-unit>
</persistence>
这是模型类（使用Eclipse创建：从表生成的实体）...
Employee.java...
package aaa.bbb.ccc.model;
import java.io.Serializable;
import javax.persistence.*;
import java.math.BigDecimal;
import java.util.Date;
import java.util.List;
/**
* The persistent class for the EMPLOYEE database table.
*
*/
@Entity
@Table(name="EMPLOYEE")
@NamedQuery(name="Employee.findAll", query="SELECT e FROM Employee e")
public class Employee implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@Column(unique=true, nullable=false, length=6)
private String empno;
@Temporal(TemporalType.DATE)
private Date birthdate;
@Column(precision=9, scale=2)
private BigDecimal bonus;
@Column(name="\"COMM\"", precision=9, scale=2)
private BigDecimal comm;
@Column(nullable=false)
private short edlevel;
@Column(nullable=false, length=12)
private String firstnme;
@Temporal(TemporalType.DATE)
private Date hiredate;
@Column(length=8)
private String job;
@Column(nullable=false, length=15)
private String lastname;
@Column(length=1)
private String midinit;
@Column(length=4)
private String phoneno;
@Column(precision=9, scale=2)
private BigDecimal salary;
@Column(length=1)
private String sex;
//bi-directional many-to-one association to Department
@OneToMany(mappedBy="employee")
private List<Department> departments;
//bi-directional many-to-one association to Department
@ManyToOne
@JoinColumn(name="WORKDEPT")
private Department department;
public Employee() {
}
public String getEmpno() {
return this.empno;
}
public void setEmpno(String empno) {
this.empno = empno;
}
public Date getBirthdate() {
return this.birthdate;
}
public void setBirthdate(Date birthdate) {
this.birthdate = birthdate;
}
public BigDecimal getBonus() {
return this.bonus;
}
public void setBonus(BigDecimal bonus) {
this.bonus = bonus;
}
public BigDecimal getComm() {
return this.comm;
}
public void setComm(BigDecimal comm) {
this.comm = comm;
}
public short getEdlevel() {
return this.edlevel;
}
public void setEdlevel(short edlevel) {
this.edlevel = edlevel;
}
public String getFirstnme() {
return this.firstnme;
}
public void setFirstnme(String firstnme) {
this.firstnme = firstnme;
}
public Date getHiredate() {
return this.hiredate;
}
public void setHiredate(Date hiredate) {
this.hiredate = hiredate;
}
public String getJob() {
return this.job;
}
public void setJob(String job) {
this.job = job;
}
public String getLastname() {
return this.lastname;
}
public void setLastname(String lastname) {
this.lastname = lastname;
}
public String getMidinit() {
return this.midinit;
}
public void setMidinit(String midinit) {
this.midinit = midinit;
}
public String getPhoneno() {
return this.phoneno;
}
public void setPhoneno(String phoneno) {
this.phoneno = phoneno;
}
public BigDecimal getSalary() {
return this.salary;
}
public void setSalary(BigDecimal salary) {
this.salary = salary;
}
public String getSex() {
return this.sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public List<Department> getDepartments() {
return this.departments;
}
public void setDepartments(List<Department> departments) {
this.departments = departments;
}
public Department addDepartment(Department department) {
getDepartments().add(department);
department.setEmployee(this);
return department;
}
public Department removeDepartment(Department department) {
getDepartments().remove(department);
department.setEmployee(null);
return department;
}
public Department getDepartment() {
return this.department;
}
public void setDepartment(Department department) {
this.department = department;
}
}
Department.java...
(removed for space - can provide on request)
Staff.java...
(removed for space - can provide on request)
这是 REST 服务 - 只是一个 GET 方法（为简单起见）...
package aaa.bbb.ccc.war;
import java.util.List;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.UriInfo;
import aaa.bbb.ccc.model.Employee;
@Stateless
@Path("/employeeList")
public class MyRestSvc {
@PersistenceContext(unitName = "DB2JPA")
EntityManager em;
@Context
UriInfo uriInfo;
public MyRestSvc() {
}
@GET
@Produces({ MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML })
public List<Employee> get(@Context javax.servlet.http.HttpServletRequest request) {
em.getEntityManagerFactory().getCache().evictAll(); // Invalidate all objects in the cache
List<Employee> eList = null;
try {
eList = em.createQuery("SELECT e FROM Employee e").getResultList();
} catch (Exception e) {
e.printStackTrace();
throw e;
}
return eList;
}
}
这是Tomee启动的日志...
(removed for space - can provide on request)
这里是系统日志ouput/reaction到GET操作...
[EL Info]: 2018-09-19 07:05:43.756--ServerSession(174651846)--Thread(Thread[http-nio-8080-exec-1,5,main])--EclipseLink, version: Eclipse Persistence Services - 2.7.1.v20171221-bd47e8f
[EL Fine]: 2018-09-19 07:05:43.765--Thread(Thread[http-nio-8080-exec-1,5,main])--Detected database platform: org.eclipse.persistence.platform.database.DB2Platform
[EL Config]: 2018-09-19 07:05:43.777--ServerSession(174651846)--Connection(393909340)--Thread(Thread[http-nio-8080-exec-1,5,main])--connecting(DatabaseLogin(
platform=>DatabasePlatform
user name=> ""
connector=>JNDIConnector datasource name=>null
))
[EL Config]: 2018-09-19 07:05:43.778--ServerSession(174651846)--Connection(935474207)--Thread(Thread[http-nio-8080-exec-1,5,main])--Connected: jdbc:db2://localhost:50000/SAMPLE
User: db2inst1
Database: DB2/LINUXX8664 Version: SQL10055
Driver: IBM Data Server Driver for JDBC and SQLJ Version: 4.21.29
[EL Config]: 2018-09-19 07:05:43.778--ServerSession(174651846)--Connection(247275895)--Thread(Thread[http-nio-8080-exec-1,5,main])--connecting(DatabaseLogin(
platform=>DB2Platform
user name=> ""
connector=>JNDIConnector datasource name=>null
))
[EL Config]: 2018-09-19 07:05:43.791--ServerSession(174651846)--Connection(1852461265)--Thread(Thread[http-nio-8080-exec-1,5,main])--Connected: jdbc:db2://localhost:50000/SAMPLE
User: db2inst1
Database: DB2/LINUXX8664 Version: SQL10055
Driver: IBM Data Server Driver for JDBC and SQLJ Version: 4.21.29
[EL Info]: 2018-09-19 07:05:43.796--ServerSession(174651846)--Thread(Thread[http-nio-8080-exec-1,5,main])--/file:/usr/local/apache-tomee-plume-7.0.5/webapps/MyRestSvc/WEB-INF/classes/_DB2JPA login successful
[EL Warning]: 2018-09-19 07:05:43.799--ServerSession(174651846)--Thread(Thread[http-nio-8080-exec-1,5,main])--Problem while registering MBean: java.lang.NullPointerException
[EL Warning]: 2018-09-19 07:05:43.806--Thread(Thread[http-nio-8080-exec-1,5,main])--The collection of metamodel types is empty. Model classes may not have been found during entity search for Java SE and some Java EE container managed persistence units. Please verify that your entity classes are referenced in persistence.xml using either <class> elements or a global <exclude-unlisted-classes>false</exclude-unlisted-classes> element
java.lang.IllegalArgumentException: An exception occurred while creating a query in EntityManager:
Exception Description: Problem compiling [SELECT e FROM Employee e].
[14, 22] The abstract schema type 'Employee' is unknown.
at org.eclipse.persistence.internal.jpa.EntityManagerImpl.createQuery(EntityManagerImpl.java:1743)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.apache.openejb.persistence.JtaEntityManager.createQuery(JtaEntityManager.java:387)
at org.apache.openejb.persistence.JtaEntityManager.proxyIfNoTx(JtaEntityManager.java:375)
at org.apache.openejb.persistence.JtaEntityManager.createQuery(JtaEntityManager.java:329)
at aaa.bbb.ccc.war.MyRestSvc.get(MyRestSvc.java:40)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.apache.openejb.core.interceptor.ReflectionInvocationContext$Invocation.invoke(ReflectionInvocationContext.java:205)
at org.apache.openejb.core.interceptor.ReflectionInvocationContext.proceed(ReflectionInvocationContext.java:186)
at org.apache.openejb.monitoring.StatsInterceptor.record(StatsInterceptor.java:191)
at org.apache.openejb.monitoring.StatsInterceptor.invoke(StatsInterceptor.java:102)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.apache.openejb.core.interceptor.ReflectionInvocationContext$Invocation.invoke(ReflectionInvocationContext.java:205)
at org.apache.openejb.core.interceptor.ReflectionInvocationContext.proceed(ReflectionInvocationContext.java:186)
at org.apache.openejb.core.interceptor.InterceptorStack.invoke(InterceptorStack.java:85)
at org.apache.openejb.core.stateless.StatelessContainer._invoke(StatelessContainer.java:252)
at org.apache.openejb.core.stateless.StatelessContainer.invoke(StatelessContainer.java:212)
at org.apache.openejb.util.proxy.ProxyEJB$Handler.invoke(ProxyEJB.java:74)
at aaa.bbb.ccc.war.MyRestSvc$$LocalBeanProxy.get(aaa/bbb/ccc/war/MyRestSvc.java)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.apache.openejb.server.cxf.rs.OpenEJBEJBInvoker.performInvocation(OpenEJBEJBInvoker.java:95)
at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:96)
at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:191)
at org.apache.openejb.server.cxf.rs.OpenEJBEJBInvoker.invoke(OpenEJBEJBInvoker.java:68)
at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:101)
at org.apache.openejb.server.cxf.rs.AutoJAXRSInvoker.invoke(AutoJAXRSInvoker.java:64)
at org.apache.cxf.interceptor.ServiceInvokerInterceptor.run(ServiceInvokerInterceptor.java:59)
at org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:96)
at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:308)
at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:121)
at org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:267)
at org.apache.openejb.server.cxf.rs.CxfRsHttpListener.doInvoke(CxfRsHttpListener.java:253)
at org.apache.tomee.webservices.CXFJAXRSFilter.doFilter(CXFJAXRSFilter.java:94)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.openejb.server.httpd.EEFilter.doFilter(EEFilter.java:65)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.tomee.catalina.OpenEJBValve.invoke(OpenEJBValve.java:44)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
at org.apache.tomee.catalina.OpenEJBSecurityListener$RequestCapturer.invoke(OpenEJBSecurityListener.java:97)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:800)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:800)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1471)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:844)
Caused by: Exception [EclipseLink-0] (Eclipse Persistence Services - 2.7.1.v20171221-bd47e8f): org.eclipse.persistence.exceptions.JPQLException
Exception Description: Problem compiling [SELECT e FROM Employee e].
[14, 22] The abstract schema type 'Employee' is unknown.
at org.eclipse.persistence.internal.jpa.jpql.HermesParser.buildException(HermesParser.java:155)
at org.eclipse.persistence.internal.jpa.jpql.HermesParser.validate(HermesParser.java:347)
at org.eclipse.persistence.internal.jpa.jpql.HermesParser.populateQueryImp(HermesParser.java:278)
at org.eclipse.persistence.internal.jpa.jpql.HermesParser.buildQuery(HermesParser.java:163)
at org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:140)
at org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:116)
at org.eclipse.persistence.internal.jpa.EJBQueryImpl.<init>(EJBQueryImpl.java:102)
at org.eclipse.persistence.internal.jpa.EJBQueryImpl.<init>(EJBQueryImpl.java:86)
at org.eclipse.persistence.internal.jpa.EntityManagerImpl.createQuery(EntityManagerImpl.java:1741)
... 71 more
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-
-
pom.xml...
(removed for space - can provide on request)
环境信息...
java 10
EclipseLink (2.7.1)
Dockerized Db2express-c
apache-tomee-7.0.5-plume
似乎与 EclipseLink 2.7.1 不兼容，不知何故。当我改为使用 EclipseLink 2.7.2 时，问题就消失了。感谢大家的意见，建议。
我从这篇帖子中得到了提示： https://www.eclipse.org/forums/index.php/t/1092642/
引用了这个错误：
https://bugs.eclipse.org/bugs/show_bug.cgi?id=532882
<!--does not work...
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>eclipselink</artifactId>
<version>2.7.1</version>
</dependency>
-->
<!-- works as expected...-->
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>eclipselink</artifactId>
<version>2.7.2</version>
</dependency>