当我尝试在 Eclipse 中安装 m2e 连接器（窗口 > 首选项 > Maven > 发现 > 打开目录）时，出现以下消息：
Unexpected exception: org/eclipse/equinox/internal/p2/core/helpers/SecureXMLUtil
错误日志中的详细信息如下：
eclipse.buildId=4.7.0.I20170612-0950
java.version=1.8.0_231
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US
Framework arguments: -product org.eclipse.epp.package.rcp.product
Command-line arguments: -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.rcp.product
org.eclipse.equinox.p2.ui.discovery
Error
Tue Nov 05 11:02:21 CST 2019
Unexpected exception: org/eclipse/equinox/internal/p2/core/helpers/SecureXMLUtil
java.lang.reflect.InvocationTargetException
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:398)
at org.eclipse.jface.wizard.WizardDialog.run(WizardDialog.java:980)
at org.eclipse.m2e.internal.discovery.wizards.MavenCatalogViewer.updateCatalog(MavenCatalogViewer.java:156)
at org.eclipse.equinox.internal.p2.ui.discovery.wizards.CatalogPage$2.run(CatalogPage.java:78)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:37)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:182)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4213)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3820)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:818)
at org.eclipse.jface.window.Window.open(Window.java:794)
at org.eclipse.m2e.internal.discovery.MavenDiscovery.launchWizard(MavenDiscovery.java:134)
at org.eclipse.m2e.internal.discovery.MavenDiscovery.launchWizard(MavenDiscovery.java:89)
at org.eclipse.m2e.internal.discovery.preferences.DiscoveryPreferencePage$1.widgetSelected(DiscoveryPreferencePage.java:62)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:249)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:86)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4428)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1079)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4238)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3817)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:818)
at org.eclipse.jface.window.Window.open(Window.java:794)
at org.eclipse.ui.internal.dialogs.WorkbenchPreferenceDialog.open(WorkbenchPreferenceDialog.java:211)
at org.eclipse.ui.internal.OpenPreferencesAction.run(OpenPreferencesAction.java:63)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:473)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:565)
at org.eclipse.jface.action.ActionContributionItem.lambda$4(ActionContributionItem.java:397)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:86)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4428)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1079)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4238)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3817)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1155)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1044)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:153)
at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:680)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:594)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:151)
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:388)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:653)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:590)
at org.eclipse.equinox.launcher.Main.run(Main.java:1499)
Caused by: java.lang.NoClassDefFoundError: org/eclipse/equinox/internal/p2/core/helpers/SecureXMLUtil
at org.eclipse.equinox.internal.p2.discovery.compatibility.DirectoryParser.parse(DirectoryParser.java:41)
at org.eclipse.equinox.internal.p2.discovery.compatibility.RemoteBundleDiscoveryStrategy$1.process(RemoteBundleDiscoveryStrategy.java:84)
at org.eclipse.equinox.internal.p2.discovery.compatibility.util.TransportUtil.readResource(TransportUtil.java:109)
at org.eclipse.equinox.internal.p2.discovery.compatibility.RemoteBundleDiscoveryStrategy.performDiscovery(RemoteBundleDiscoveryStrategy.java:81)
at org.eclipse.equinox.internal.p2.discovery.Catalog.performDiscovery(Catalog.java:85)
at org.eclipse.m2e.internal.discovery.wizards.MavenCatalogViewer$2.run(MavenCatalogViewer.java:164)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:119)
我发现类似的错误这在浏览市场时，但我的市场似乎可以工作，而当我尝试调整我的网络配置时它似乎没有帮助。
可能存在什么问题？
答案1
好吧，我不确定到底发生了什么。但我似乎通过从 Oxygen 更新 Eclipse 最新版本 (19-09) 解决了该问题。我猜版本兼容性有问题。