我想尝试使用Eclipse在Windows上设置开发环境。但在成功设置项目ID和gs存储桶后的最后一步失败了。这些错误似乎与网络有关（我在Eclipse中设置了代理），我猜Maven需要设置代理，但是如何？有人可以证实吗？感谢。
＆＃34;尝试创建项目＆＃34;
时遇到错误java.lang.reflect.InvocationTargetException
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:423)
at org.eclipse.jface.wizard.WizardDialog.run(WizardDialog.java:1059)
at com.google.cloud.dataflow.eclipse.ui.wizard.NewDataflowProjectWizard.performFinish(NewDataflowProjectWizard.java:50)
at org.eclipse.jface.wizard.WizardDialog.finishPressed(WizardDialog.java:853)
at org.eclipse.jface.wizard.WizardDialog.buttonPressed(WizardDialog.java:438)
at org.eclipse.jface.dialogs.Dialog$2.widgetSelected(Dialog.java:619)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:248)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4353)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1061)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4172)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3761)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:832)
at org.eclipse.jface.window.Window.open(Window.java:808)
at org.eclipse.ui.actions.NewProjectAction.run(NewProjectAction.java:117)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:519)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:595)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:511)
at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:420)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4353)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1061)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4172)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3761)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1151)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1032)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:148)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:636)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:579)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:135)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603)
at org.eclipse.equinox.launcher.Main.run(Main.java:1465)
Caused by: java.lang.IllegalStateException: org.eclipse.core.runtime.CoreException: Could not resolve artifact com.google.cloud.dataflow:google-cloud-dataflow-java-archetypes-examples:pom:LATEST
at com.google.cloud.dataflow.eclipse.core.project.DataflowProjectCreator.run(DataflowProjectCreator.java:207)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:122)
Caused by: org.eclipse.core.runtime.CoreException: Could not resolve artifact com.google.cloud.dataflow:google-cloud-dataflow-java-archetypes-examples:pom:LATEST
at org.eclipse.m2e.core.internal.embedder.MavenImpl$5.call(MavenImpl.java:776)
at org.eclipse.m2e.core.internal.embedder.MavenImpl$5.call(MavenImpl.java:1)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:151)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:99)
at org.eclipse.m2e.core.internal.embedder.MavenImpl.resolve(MavenImpl.java:743)
at org.eclipse.m2e.core.internal.embedder.MavenImpl.resolve(MavenImpl.java:720)
at com.google.cloud.dataflow.eclipse.core.project.DataflowArtifactRetriever.archetypePom(DataflowArtifactRetriever.java:54)
at com.google.cloud.dataflow.eclipse.core.project.DataflowProjectCreator.defaultArchetypeVersions(DataflowProjectCreator.java:250)
at com.google.cloud.dataflow.eclipse.core.project.DataflowProjectCreator.run(DataflowProjectCreator.java:204)
... 1 more
＆＃34;无法将原型版本用作默认版本＆＃34;
org.eclipse.core.runtime.CoreException: Could not resolve artifact com.google.cloud.dataflow:google-cloud-dataflow-java-archetypes-examples:pom:LATEST
at org.eclipse.m2e.core.internal.embedder.MavenImpl$5.call(MavenImpl.java:776)
at org.eclipse.m2e.core.internal.embedder.MavenImpl$5.call(MavenImpl.java:1)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:151)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:99)
at org.eclipse.m2e.core.internal.embedder.MavenImpl.resolve(MavenImpl.java:743)
at org.eclipse.m2e.core.internal.embedder.MavenImpl.resolve(MavenImpl.java:720)
at com.google.cloud.dataflow.eclipse.core.project.DataflowArtifactRetriever.archetypePom(DataflowArtifactRetriever.java:54)
at com.google.cloud.dataflow.eclipse.core.project.DataflowProjectCreator.defaultArchetypeVersions(DataflowProjectCreator.java:250)
at com.google.cloud.dataflow.eclipse.core.project.DataflowProjectCreator.run(DataflowProjectCreator.java:204)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:122)
Contains: Failed to resolve version for com.google.cloud.dataflow:google-cloud-dataflow-java-archetypes-examples:pom:LATEST: Could not find metadata com.google.cloud.dataflow:google-cloud-dataflow-java-archetypes-examples/maven-metadata.xml in local (C:\Users\ztang16\.m2\repository)
org.eclipse.aether.resolution.VersionResolutionException: Failed to resolve version for com.google.cloud.dataflow:google-cloud-dataflow-java-archetypes-examples:pom:LATEST: Could not find metadata com.google.cloud.dataflow:google-cloud-dataflow-java-archetypes-examples/maven-metadata.xml in local (C:\Users\ztang16\.m2\repository)
at org.apache.maven.repository.internal.DefaultVersionResolver.resolveVersion(DefaultVersionResolver.java:313)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:302)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifacts(DefaultArtifactResolver.java:246)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifact(DefaultArtifactResolver.java:223)
at org.eclipse.aether.internal.impl.DefaultRepositorySystem.resolveArtifact(DefaultRepositorySystem.java:294)
at org.eclipse.m2e.core.internal.embedder.MavenImpl$5.call(MavenImpl.java:753)
at org.eclipse.m2e.core.internal.embedder.MavenImpl$5.call(MavenImpl.java:1)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:151)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:99)
at org.eclipse.m2e.core.internal.embedder.MavenImpl.resolve(MavenImpl.java:743)
at org.eclipse.m2e.core.internal.embedder.MavenImpl.resolve(MavenImpl.java:720)
at com.google.cloud.dataflow.eclipse.core.project.DataflowArtifactRetriever.archetypePom(DataflowArtifactRetriever.java:54)
at com.google.cloud.dataflow.eclipse.core.project.DataflowProjectCreator.defaultArchetypeVersions(DataflowProjectCreator.java:250)
at com.google.cloud.dataflow.eclipse.core.project.DataflowProjectCreator.run(DataflowProjectCreator.java:204)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:122)
Caused by: org.eclipse.aether.transfer.MetadataNotFoundException: Could not find metadata com.google.cloud.dataflow:google-cloud-dataflow-java-archetypes-examples/maven-metadata.xml in local (C:\Users\ztang16\.m2\repository)
at org.eclipse.aether.internal.impl.DefaultMetadataResolver.resolve(DefaultMetadataResolver.java:247)
at org.eclipse.aether.internal.impl.DefaultMetadataResolver.resolveMetadata(DefaultMetadataResolver.java:205)
at org.apache.maven.repository.internal.DefaultVersionResolver.resolveVersion(DefaultVersionResolver.java:250)
... 15 more
答案 0 :(得分：1)
在为examples项目解析最新版本的Maven原型时，您似乎遇到了问题。最内在的例外似乎是：
org.eclipse.aether.transfer.MetadataNotFoundException:
Could not find metadata com.google.cloud.dataflow:google-cloud-dataflow-java-archetypes-examples/maven-metadata.xml
in local (C:\Users\YOUR-USERNAME\.m2\repository)
这表示您的本地存储库存在问题。
我们之前没有看到此特定错误，但通过手动删除本地计算机上的以下目录并重试，解决了与切向相关的问题。
C:\Users\YOUR-USERNAME\.m2\repository\com\google\cloud\dataflow\dataflow:google-cloud-dataflow-java-archetypes-examples
这将迫使Maven重新初始化本地存储库的那一部分，并可能重新创建丢失的元数据文件。
也就是说，我们略微改变了Eclipse插件与m2e插件的交互方式。新代码根本不会通过m2e。很可能这对于更新的代码来说不是问题。我们暂时计划在下周发布一个新版本，其中包含此更改。
现在，您的环境中的HTTP代理配置也可能存在问题。我找到了this StackOverflow question，它解释了如何配置M2Eclipse插件的高级选项，包括代理设置。 Dataflow Eclipse插件构建在M2Eclipse之上，我希望这些设置能够自动应用。