无法将模块添加到 Java EE 企业应用程序 - 创建企业应用程序项目时出现 nullPointer

Question

我们一直在使用 RAD 7.5.5/WebSphere 6.1，但正在将我们的开发环境升级到 Eclipse Juno/WAS 8.5。虽然在 RAD/WAS 6.1 中一切正常，但我无法让我们的网站在 Eclipse/WAS 8.5 中本地运行。

我截取了我的创作过程，请参阅下面的链接。 nullPointerException 堆栈跟踪也包括在内。 http://screencast.com/t/VE5KxmCCSsQ

这是我的项目设置的一些图像。 CBSWebApp 是 Java/JSP 应用程序，eCB 是企业应用程序项目。 http://imgur.com/Ol0pDbt,mC4cT1b,WXMYvbQ#0

eclipse.buildId=M20130204-1200
java.version=1.7.0_25
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US
Framework arguments:  -product org.eclipse.epp.package.jee.product
Command-line arguments:  -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.jee.product

Error
Thu Jul 18 15:18:02 EDT 2013


java.lang.NullPointerException
    at org.eclipse.jst.j2ee.application.internal.operations.AddComponentToEnterpriseApplicationOp.findReferencedComponent(AddComponentToEnterpriseApplicationOp.java:413)
    at org.eclipse.jst.j2ee.application.internal.operations.AddComponentToEnterpriseApplicationOp.updateEARDD(AddComponentToEnterpriseApplicationOp.java:140)
    at org.eclipse.jst.j2ee.application.internal.operations.AddComponentToEnterpriseApplicationOp.execute(AddComponentToEnterpriseApplicationOp.java:87)
    at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelPausibleOperationImpl$1.run(DataModelPausibleOperationImpl.java:385)
    at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2344)
    at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelPausibleOperationImpl.runOperation(DataModelPausibleOperationImpl.java:410)
    at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelPausibleOperationImpl.runOperation(DataModelPausibleOperationImpl.java:360)
    at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelPausibleOperationImpl.doExecute(DataModelPausibleOperationImpl.java:247)
    at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelPausibleOperationImpl.executeImpl(DataModelPausibleOperationImpl.java:219)
    at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelPausibleOperationImpl.cacheThreadAndContinue(DataModelPausibleOperationImpl.java:89)
    at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelPausibleOperationImpl.execute(DataModelPausibleOperationImpl.java:207)
    at org.eclipse.jst.j2ee.project.facet.EarFacetPostInstallDelegate.execute(EarFacetPostInstallDelegate.java:75)
    at org.eclipse.wst.common.project.facet.core.events.internal.LegacyEventHandlerAdapter.handleEvent(LegacyEventHandlerAdapter.java:69)
    at org.eclipse.wst.common.project.facet.core.events.internal.ProjectListenerRegistry.notifyListeners(ProjectListenerRegistry.java:76)
    at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.notifyListeners(FacetedProject.java:1327)
    at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.modifyInternal(FacetedProject.java:454)
    at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.mergeChangesInternal(FacetedProject.java:1181)
    at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.access$2(FacetedProject.java:1117)
    at org.eclipse.wst.common.project.facet.core.internal.FacetedProject$5.run(FacetedProject.java:1099)
    at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2344)
    at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.mergeChanges(FacetedProject.java:1109)
    at org.eclipse.wst.common.project.facet.core.internal.FacetedProjectWorkingCopy.commitChanges(FacetedProjectWorkingCopy.java:2020)
    at org.eclipse.wst.common.project.facet.ui.ModifyFacetedProjectWizard.performFinish(ModifyFacetedProjectWizard.java:400)
    at org.eclipse.wst.web.ui.internal.wizards.NewProjectDataModelFacetWizard.performFinish(NewProjectDataModelFacetWizard.java:282)
    at org.eclipse.wst.common.project.facet.ui.ModifyFacetedProjectWizard$3.run(ModifyFacetedProjectWizard.java:331)
    at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2344)
    at org.eclipse.wst.common.project.facet.ui.ModifyFacetedProjectWizard$4.run(ModifyFacetedProjectWizard.java:345)
    at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)

尝试在 Eclipse 中将上下文根设置为 CBSWebApp 时，我也会得到以下 nullPointerException。在工作 RAD 环境中查看我的设置时，我注意到该字段已成功填写为“CBSWebApp”，但在 Eclipse 中仍然是空白默认值，如果不生成以下错误，我无法更改它。

null
Error
Thu Jul 18 16:06:44 EDT 2013


java.lang.NullPointerException
    at org.eclipse.wst.common.componentcore.internal.resources.VirtualComponent.setMetaProperty(VirtualComponent.java:283)
    at org.eclipse.wst.common.componentcore.internal.operation.ServerContextRootUpdateOperation.execute(ServerContextRootUpdateOperation.java:40)
    at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelPausibleOperationImpl$1.run(DataModelPausibleOperationImpl.java:385)
    at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2344)
    at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelPausibleOperationImpl.runOperation(DataModelPausibleOperationImpl.java:410)
    at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelPausibleOperationImpl.runOperation(DataModelPausibleOperationImpl.java:360)
    at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelPausibleOperationImpl.doExecute(DataModelPausibleOperationImpl.java:247)
    at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelPausibleOperationImpl.executeImpl(DataModelPausibleOperationImpl.java:219)
    at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelPausibleOperationImpl.cacheThreadAndContinue(DataModelPausibleOperationImpl.java:89)
    at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelPausibleOperationImpl.execute(DataModelPausibleOperationImpl.java:207)
    at org.eclipse.wst.common.componentcore.internal.util.ComponentUtilities.setServerContextRoot(ComponentUtilities.java:337)
    at org.eclipse.jst.j2ee.internal.ui.refactoring.RenameContextRootChange.perform(RenameContextRootChange.java:125)
    at org.eclipse.ltk.core.refactoring.CompositeChange.perform(CompositeChange.java:278)
    at org.eclipse.ltk.core.refactoring.CompositeChange.perform(CompositeChange.java:278)
    at org.eclipse.ltk.core.refactoring.PerformChangeOperation$1.run(PerformChangeOperation.java:258)
    at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2344)
    at org.eclipse.ltk.core.refactoring.PerformChangeOperation.executeChange(PerformChangeOperation.java:306)
    at org.eclipse.ltk.internal.ui.refactoring.UIPerformChangeOperation.executeChange(UIPerformChangeOperation.java:92)
    at org.eclipse.ltk.core.refactoring.PerformChangeOperation.run(PerformChangeOperation.java:223)
    at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2344)
    at org.eclipse.ltk.internal.ui.refactoring.WorkbenchRunnableAdapter.run(WorkbenchRunnableAdapter.java:87)
    at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)

非常感谢您的帮助 - 这给我和我的团队带来了很多问题。谢谢！

Answer 1

根本原因是由于安装了错误的java web facet，WTP项目配置失败。

您可以尝试确定EAR项目是否有部署描述符，如果有，则强制保存。

    final ReferencedComponent ref = AddComponentToEnterpriseApplicationOp.findReferencedComponent(earwc, wc, se, compse);

Answer 2

我必须删除项目 facet .xml 文件，以便使用正确的 facet 重新创建它