Eclipselink错误3002

我按照说明here（特别是任务3和4）从Toplink 10g到本地Eclipselink v2.6.4进行简单迁移。一切都编译好，但是当我尝试运行我的应用程序时，我得到下面的错误。Eclipselink错误3002

我尝试使用旧的映射文件（它仍然兼容）以及从Eclipselink工作台通过导入我的旧Toplink工作台项目生成的新映射文件。

请注意，我只从Toplink迁移到本地Eclispelink。没有涉及JPA。

有什么想法是什么错？它似乎试图不正确地使用String而不是我的实际类，但不确定。

此外，我的应用程序从来没有一个persistence.xml文件。我现在需要一个吗？

2017-02-20 14:55:52 ERROR - Presentation - Local Exception Stack: 
Exception [EclipseLink-3002] (Eclipse Persistence Services - 2.6.4.v20160829-44060b6): org.eclipse.persistence.exceptions.ConversionException 
Exception Description: The object [ca.ncams.wisor.refdata.AccessTandem], of class [class java.lang.String], from mapping [org.eclipse.persistence.oxm.mappings.XMLDirectMapping[javaClass-->class/text()]] with descriptor [XMLDescriptor(org.eclipse.persistence.descriptors.ClassDescriptor --> [DatabaseTable(class-mapping-descriptor)])], could not be converted to [class java.lang.Class]. 
Internal Exception: java.lang.ClassNotFoundException: ca.ncams.wisor.refdata.AccessTandem 
       at org.eclipse.persistence.exceptions.ConversionException.couldNotBeConvertedToClass(ConversionException.java:98) 
       at org.eclipse.persistence.internal.helper.ConversionManager.convertObjectToClass(ConversionManager.java:451) 
       at org.eclipse.persistence.internal.helper.ConversionManager.convertObject(ConversionManager.java:146) 
       at org.eclipse.persistence.internal.oxm.XMLConversionManager.convertObject(XMLConversionManager.java:197) 
       at org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform.convertObject(DatasourcePlatform.java:179) 
       at org.eclipse.persistence.oxm.mappings.XMLDirectMapping.getAttributeValue(XMLDirectMapping.java:301) 
       at org.eclipse.persistence.oxm.mappings.XMLDirectMapping.valueFromRow(XMLDirectMapping.java:364) 
       at org.eclipse.persistence.mappings.DatabaseMapping.readFromRowIntoObject(DatabaseMapping.java:1539) 
       at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildAttributesIntoObject(ObjectBuilder.java:462) 
       at org.eclipse.persistence.internal.oxm.XMLObjectBuilder.buildAttributesIntoObject(XMLObjectBuilder.java:378) 
       at org.eclipse.persistence.internal.oxm.XMLObjectBuilder.buildObject(XMLObjectBuilder.java:291) 
       at org.eclipse.persistence.oxm.mappings.XMLCompositeCollectionMapping.buildCompositeObject(XMLCompositeCollectionMapping.java:380) 
       at org.eclipse.persistence.oxm.mappings.XMLCompositeCollectionMapping.buildObjectFromNestedRow(XMLCompositeCollectionMapping.java:587) 
       at org.eclipse.persistence.oxm.mappings.XMLCompositeCollectionMapping.valueFromRow(XMLCompositeCollectionMapping.java:511) 
       at org.eclipse.persistence.mappings.DatabaseMapping.readFromRowIntoObject(DatabaseMapping.java:1539) 
       at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildAttributesIntoObject(ObjectBuilder.java:462) 
       at org.eclipse.persistence.internal.oxm.XMLObjectBuilder.buildAttributesIntoObject(XMLObjectBuilder.java:378) 
       at org.eclipse.persistence.internal.oxm.XMLObjectBuilder.buildObject(XMLObjectBuilder.java:291) 
       at org.eclipse.persistence.internal.oxm.record.DOMUnmarshaller.xmlToObject(DOMUnmarshaller.java:469) 
       at org.eclipse.persistence.internal.oxm.record.DOMUnmarshaller.unmarshal(DOMUnmarshaller.java:267) 
       at org.eclipse.persistence.internal.oxm.record.DOMUnmarshaller.unmarshal(DOMUnmarshaller.java:246) 
       at org.eclipse.persistence.internal.oxm.XMLUnmarshaller.unmarshal(XMLUnmarshaller.java:530) 
       at org.eclipse.persistence.sessions.factories.XMLProjectReader.readObjectPersistenceRuntimeFormat(XMLProjectReader.java:293) 
       at org.eclipse.persistence.sessions.factories.XMLProjectReader.read(XMLProjectReader.java:186) 
       at org.eclipse.persistence.sessions.factories.XMLProjectReader.read(XMLProjectReader.java:242) 
       at org.eclipse.persistence.sessions.factories.XMLProjectReader.read(XMLProjectReader.java:100) 
       at ca.ncams.wisor.persistence.toplink.PersistenceManager.initializeTopLink(PersistenceManager.java:491) 
       at ca.ncams.wisor.persistence.toplink.PersistenceManager.<init>(PersistenceManager.java:83) 
       at ca.ncams.wisor.persistence.toplink.PersistenceManager.getInstance(PersistenceManager.java:96) 
       at ca.ncams.wisor.persistence.toplink.AutoRollbackFilter.doFilter(AutoRollbackFilter.java:57) 
       at ca.ncams.wisor.filter.FilterChainImpl.doFilter(FilterChainImpl.java:124) 
       at ca.ncams.wisor.presentation.filters.CatchAllFilter.doFilter(CatchAllFilter.java:60) 
       at ca.ncams.wisor.filter.FilterChainImpl.doFilter(FilterChainImpl.java:124) 
       at ca.ncams.wisor.presentation.filters.NoCacheFilter.doFilter(NoCacheFilter.java:47) 
       at ca.ncams.wisor.filter.FilterChainImpl.doFilter(FilterChainImpl.java:124) 
       at ca.ncams.wisor.filter.FilterJspBase.service(FilterJspBase.java:111) 
       at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:286) 
       at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:260) 
       at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:137) 
       at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:350) 
       at weblogic.servlet.internal.ServletStubImpl.onAddToMapException(ServletStubImpl.java:489) 
       at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:376) 
       at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:247) 
       at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3679) 
       at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.__run(WebAppServletContext.java:3649) 
       at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java) 
       at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:326) 
       at weblogic.security.service.SecurityManager.runAsForUserCode(SecurityManager.java:197) 
       at weblogic.servlet.provider.WlsSecurityProvider.runAsForUserCode(WlsSecurityProvider.java:203) 
       at weblogic.servlet.provider.WlsSubjectHandle.run(WlsSubjectHandle.java:71) 
       at weblogic.servlet.internal.WebAppServletContext.doSecuredExecute(WebAppServletContext.java:2433) 
       at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2281) 
       at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2259) 
       at weblogic.servlet.internal.ServletRequestImpl.runInternal(ServletRequestImpl.java:1691) 
       at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1651) 
       at weblogic.servlet.provider.ContainerSupportProviderImpl$WlsRequestExecutor.run(ContainerSupportProviderImpl.java:270) 
       at weblogic.invocation.ComponentInvocationContextManager._runAs(ComponentInvocationContextManager.java:348) 
       at weblogic.invocation.ComponentInvocationContextManager.runAs(ComponentInvocationContextManager.java:333) 
       at weblogic.work.LivePartitionUtility.doRunWorkUnderContext(LivePartitionUtility.java:54) 
       at weblogic.work.PartitionUtility.runWorkUnderContext(PartitionUtility.java:41) 
       at weblogic.work.SelfTuningWorkManagerImpl.runWorkUnderContext(SelfTuningWorkManagerImpl.java:640) 
       at weblogic.work.ExecuteThread.execute(ExecuteThread.java:406) 
       at weblogic.work.ExecuteThread.run(ExecuteThread.java:346) 
Caused by: java.lang.ClassNotFoundException: ca.ncams.wisor.refdata.AccessTandem 
       at java.net.URLClassLoader.findClass(URLClassLoader.java:381) 
       at java.lang.ClassLoader.loadClass(ClassLoader.java:424) 
       at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) 
       at java.lang.ClassLoader.loadClass(ClassLoader.java:357) 
       at java.lang.Class.forName0(Native Method) 
       at java.lang.Class.forName(Class.java:348) 
       at org.eclipse.persistence.internal.helper.ConversionManager.convertObjectToClass(ConversionManager.java:448) 
       ... 61 more

来源

2017-02-21 Graham Stephenson

问题发生是因为您的映射文件包含“ca.ncams.wisor.refdata.AccessTandem”引用，并且要加载项目，需要将其转换为类但不能，因为您没有ca .cams.wisor.refdata.AccessTandem文件放在项目的类路径中。 – Chris

旧的和新的映射文件都包含完整的软件包名称。它可以通过Toplink而不是EL工作正常。文件ca.ncams.wisor。*是我的应用程序中的类，所以它们肯定存在。不过，我想知道如果加载类的顺序现在是不同的。在旧系统中，所有内容都位于WEB-INF/lib目录中，但现在EclipseLink位于容器中。这会有所作为吗？有没有办法改变订单？ –

您是否将具有您的ca.ncams.wisor。*类的类加载器传递给XMLProjectReader？无论使用哪种加载器，都无法找到导致异常的指定ca.ncams.wisor.refdata.AccessTandem类。 – Chris

这里是我落得这样做：

添加的EclipseLink 2.6.4依赖于POM（编译，而不是提供）
添加到weblogic.xml中：

<wls:container-descriptor> 
    <wls:prefer-application-packages> 
     <wls:package-name>org.eclipse.persistence</wls:package-name> 
    </wls:prefer-application-packages> 
</wls:container-descriptor>

现在Eclipse链接找到我的课程并启动。

请注意，我的代码只传入映射文件，而不是类加载器XMLProjectReader.read();，所以我想使用默认的类加载器。

如果有人知道如何通过类加载器，我仍然很想知道（我从哪里得到它？）。

来源

2017-02-24 02:54:50

Eclipselink错误3002

回答

相关问题