我在部署 appengine 时遇到问题。在应用程序部署结束时，我收到以下错误
An internal error occurred during: "Deploying My GWT AppEngine to Google".
org/eclipse/jpt/jpa/core/JpaProject
应用程序已部署，但如果我运行该版本，我的数据会出现问题，会出现以下错误日志。
The class "The class "com.example.mygwt.engine.bean.Bean" is not persistable.
This means that it either hasnt been enhanced, or that the enhanced version
of the file is not in the CLASSPATH (or is hidden by an unenhanced version),
or the Meta-Data/annotations for the class are not found." is not persistable.
在更新 google eclipse 插件之前我没有这个问题。
日食崩溃日志
eclipse.buildId=M20120208-0800
java.version=1.6.0_15
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US
Command-line arguments: -os win32 -ws win32 -arch x86_64
Error
Wed May 16 13:03:13 EDT 2012
An error occurred while automatically activating bundle org.eclipse.jpt.jpa.core (295).
org.osgi.framework.BundleException: The activator org.eclipse.jpt.jpa.core.JptJpaCorePlugin for bundle org.eclipse.jpt.jpa.core is invalid
at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadBundleActivator(AbstractBundle.java:171)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:679)
at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:299)
at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:440)
at org.eclipse.osgi.internal.loader.BundleLoader.setLazyTrigger(BundleLoader.java:268)
at org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:107)
at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:463)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:216)
at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:400)
at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:476)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:429)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:417)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)
at java.lang.ClassLoader.loadClass(Unknown Source)
at org.eclipse.osgi.internal.loader.BundleLoader.loadClass(BundleLoader.java:345)
at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass(BundleHost.java:229)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass(AbstractBundle.java:1207)
at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:174)
at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:905)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:243)
at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:55)
at org.eclipse.core.internal.content.ContentType.getDescriber(ContentType.java:271)
at org.eclipse.core.internal.content.ContentTypeCatalog.collectMatchingByContents(ContentTypeCatalog.java:184)
at org.eclipse.core.internal.content.ContentTypeCatalog.internalFindContentTypesFor(ContentTypeCatalog.java:403)
at org.eclipse.core.internal.content.ContentTypeCatalog.internalFindContentTypesFor(ContentTypeCatalog.java:450)
at org.eclipse.core.internal.content.ContentTypeCatalog.getDescriptionFor(ContentTypeCatalog.java:346)
at org.eclipse.core.internal.content.ContentTypeCatalog.getDescriptionFor(ContentTypeCatalog.java:360)
at org.eclipse.core.internal.content.ContentTypeMatcher.getDescriptionFor(ContentTypeMatcher.java:86)
at org.eclipse.core.internal.resources.ContentDescriptionManager.readDescription(ContentDescriptionManager.java:445)
at org.eclipse.core.internal.resources.ContentDescriptionManager.getDescriptionFor(ContentDescriptionManager.java:355)
at org.eclipse.core.internal.resources.File.internalGetCharset(File.java:246)
at org.eclipse.core.internal.resources.File.getCharset(File.java:207)
at org.eclipse.core.internal.resources.File.getCharset(File.java:194)
at org.eclipse.core.internal.filebuffers.ResourceTextFileBuffer.cacheEncodingState(ResourceTextFileBuffer.java:479)
at org.eclipse.core.internal.filebuffers.ResourceTextFileBuffer.initializeFileBufferContent(ResourceTextFileBuffer.java:281)
at org.eclipse.core.internal.filebuffers.ResourceFileBuffer.create(ResourceFileBuffer.java:245)
at org.eclipse.core.internal.filebuffers.TextFileBufferManager.connect(TextFileBufferManager.java:112)
at org.eclipse.wst.sse.core.internal.FileBufferModelManager.getModel(FileBufferModelManager.java:660)
at org.eclipse.wst.sse.core.internal.model.ModelManagerImpl._doCommonGetModel(ModelManagerImpl.java:544)
at org.eclipse.wst.sse.core.internal.model.ModelManagerImpl._commonGetModel(ModelManagerImpl.java:508)
at org.eclipse.wst.sse.core.internal.model.ModelManagerImpl._commonGetModel(ModelManagerImpl.java:481)
at org.eclipse.wst.sse.core.internal.model.ModelManagerImpl.getModelForRead(ModelManagerImpl.java:1419)
at com.google.gdt.eclipse.core.SseUtilities.getModelForRead(SseUtilities.java:142)
at com.google.gwt.eclipse.core.uibinder.validators.UiBinderJavaValidator$UiBinderSubtypeVisitor.parseAndValidateUiXml(UiBinderJavaValidator.java:291)
at com.google.gwt.eclipse.core.uibinder.validators.UiBinderJavaValidator$UiBinderSubtypeVisitor.visit(UiBinderJavaValidator.java:257)
at org.eclipse.jdt.core.dom.TypeDeclaration.accept0(TypeDeclaration.java:467)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2514)
at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:2585)
at org.eclipse.jdt.core.dom.TypeDeclaration.accept0(TypeDeclaration.java:484)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2514)
at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:2585)
at org.eclipse.jdt.core.dom.CompilationUnit.accept0(CompilationUnit.java:219)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2514)
at com.google.gwt.eclipse.core.uibinder.validators.UiBinderJavaValidator.validate(UiBinderJavaValidator.java:519)
at com.google.gwt.eclipse.core.validators.java.JavaCompilationParticipant$2.acceptAST(JavaCompilationParticipant.java:393)
at org.eclipse.jdt.core.dom.CompilationUnitResolver.resolve(CompilationUnitResolver.java:883)
at org.eclipse.jdt.core.dom.CompilationUnitResolver.resolve(CompilationUnitResolver.java:577)
at org.eclipse.jdt.core.dom.ASTParser.createASTs(ASTParser.java:894)
at org.eclipse.jdt.internal.corext.dom.ASTBatchParser.createASTs(ASTBatchParser.java:100)
at com.google.gwt.eclipse.core.validators.java.JavaCompilationParticipant.handleBuildStarting(JavaCompilationParticipant.java:326)
at com.google.gwt.eclipse.core.validators.java.JavaCompilationParticipant.access$0(JavaCompilationParticipant.java:307)
at com.google.gwt.eclipse.core.validators.java.JavaCompilationParticipant$1.run(JavaCompilationParticipant.java:191)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
Caused by: java.lang.ExceptionInInitializerError
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadBundleActivator(AbstractBundle.java:166)
... 63 more
Caused by: java.lang.IllegalArgumentException: Project facet jst.web has not been defined.
at org.eclipse.wst.common.project.facet.core.internal.FacetedProjectFrameworkImpl.getProjectFacet(FacetedProjectFrameworkImpl.java:234)
at org.eclipse.wst.common.project.facet.core.ProjectFacetsManager.getProjectFacet(ProjectFacetsManager.java:75)
at org.eclipse.jpt.jpa.core.JptJpaCorePlugin.<clinit>(JptJpaCorePlugin.java:210)
... 70 more