Eclipse无法启动报An internal error occurred during: "reload maven project". java.lang.NullPointerExceptio

转自http://www.cnblogs.com/rwxwsblog/p/5048140.html

　　由于没有正常关机导致eclipse无法将数据正常写入配置文件导致无法启动。报这样一个异常

An internal error occurred during: "reload maven project". java.lang.NullPointerException

　　查看workspace/.metadata/.log发现如下异常：

!ENTRY org.eclipse.core.resources 2 10035 2015-12-15 09:31:13.488!MESSAGE The workspace exited with unsaved changes in the previous session; refreshing workspace to recover changes.!ENTRY org.eclipse.jst.jsp.core 4 4 2015-12-15 09:31:24.995!MESSAGE A workspace crash was detected. The previous session did not exit normally. Not using saved taglib indexes.!ENTRY org.eclipse.m2e.logback.appender 4 0 2015-12-15 09:31:35.362!MESSAGE Cannot determine URI for '/maentest/pom.xml'.!STACK 1org.eclipse.ui.PartInitException: Cannot determine URI for '/maentest/pom.xml'.    at org.eclipse.ui.texteditor.AbstractTextEditor.internalInit(AbstractTextEditor.java:3252)    at org.eclipse.ui.texteditor.AbstractTextEditor.init(AbstractTextEditor.java:3265)    at org.eclipse.wst.sse.ui.StructuredTextEditor.init(StructuredTextEditor.java:2620)    at org.eclipse.ui.part.MultiPageEditorPart.addPage(MultiPageEditorPart.java:239)    at org.eclipse.ui.forms.editor.FormEditor.addPage(FormEditor.java:325)    at org.eclipse.ui.part.MultiPageEditorPart.addPage(MultiPageEditorPart.java:213)    at org.eclipse.ui.forms.editor.FormEditor.addPage(FormEditor.java:308)    at org.eclipse.m2e.editor.pom.MavenPomEditor.addSourcePage(MavenPomEditor.java:618)    at org.eclipse.m2e.editor.pom.MavenPomEditor.addPages(MavenPomEditor.java:353)    at org.eclipse.ui.forms.editor.FormEditor.createPages(FormEditor.java:138)    at org.eclipse.ui.part.MultiPageEditorPart.createPartControl(MultiPageEditorPart.java:362)    at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.createPartControl(CompatibilityPart.java:141)    at org.eclipse.ui.internal.e4.compatibility.CompatibilityEditor.createPartControl(CompatibilityEditor.java:99)    at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.create(CompatibilityPart.java:327)    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)    at java.lang.reflect.Method.invoke(Method.java:606)    at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:55)    at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:888)    at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:869)    at org.eclipse.e4.core.internal.di.InjectorImpl.inject(InjectorImpl.java:120)    at org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:337)    at org.eclipse.e4.core.internal.di.InjectorImpl.make(InjectorImpl.java:258)    at org.eclipse.e4.core.contexts.ContextInjectionFactory.make(ContextInjectionFactory.java:162)    at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.createFromBundle(ReflectionContributionFactory.java:104)    at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.doCreate(ReflectionContributionFactory.java:73)    at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.create(ReflectionContributionFactory.java:55)    at org.eclipse.e4.ui.workbench.renderers.swt.ContributedPartRenderer.createWidget(ContributedPartRenderer.java:127)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createWidget(PartRenderingEngine.java:983)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:662)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:766)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$2(PartRenderingEngine.java:737)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$7.run(PartRenderingEngine.java:731)    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:715)    at org.eclipse.e4.ui.workbench.renderers.swt.StackRenderer.showTab(StackRenderer.java:1250)    at org.eclipse.e4.ui.workbench.renderers.swt.LazyStackRenderer.postProcess(LazyStackRenderer.java:100)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:678)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:766)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$2(PartRenderingEngine.java:737)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$7.run(PartRenderingEngine.java:731)    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:715)    at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:68)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:674)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$6.run(PartRenderingEngine.java:547)    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:531)    at org.eclipse.e4.ui.workbench.renderers.swt.ElementReferenceRenderer.createWidget(ElementReferenceRenderer.java:69)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createWidget(PartRenderingEngine.java:983)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:662)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:766)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$2(PartRenderingEngine.java:737)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$7.run(PartRenderingEngine.java:731)    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:715)    at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:68)    at org.eclipse.e4.ui.workbench.renderers.swt.SashRenderer.processContents(SashRenderer.java:185)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:674)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:766)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$2(PartRenderingEngine.java:737)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$7.run(PartRenderingEngine.java:731)    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:715)    at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:68)    at org.eclipse.e4.ui.workbench.renderers.swt.SashRenderer.processContents(SashRenderer.java:185)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:674)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:766)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$2(PartRenderingEngine.java:737)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$7.run(PartRenderingEngine.java:731)    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:715)    at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:68)    at org.eclipse.e4.ui.workbench.renderers.swt.SashRenderer.processContents(SashRenderer.java:185)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:674)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:766)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$2(PartRenderingEngine.java:737)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$7.run(PartRenderingEngine.java:731)    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:715)    at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:68)    at org.eclipse.e4.ui.workbench.renderers.swt.PerspectiveRenderer.processContents(PerspectiveRenderer.java:49)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:674)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:766)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$2(PartRenderingEngine.java:737)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$7.run(PartRenderingEngine.java:731)    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:715)    at org.eclipse.e4.ui.workbench.renderers.swt.PerspectiveStackRenderer.showTab(PerspectiveStackRenderer.java:103)    at org.eclipse.e4.ui.workbench.renderers.swt.LazyStackRenderer.postProcess(LazyStackRenderer.java:100)    at org.eclipse.e4.ui.workbench.renderers.swt.PerspectiveStackRenderer.postProcess(PerspectiveStackRenderer.java:77)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:678)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:766)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$2(PartRenderingEngine.java:737)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$7.run(PartRenderingEngine.java:731)    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:715)    at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:68)    at org.eclipse.e4.ui.workbench.renderers.swt.SashRenderer.processContents(SashRenderer.java:185)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:674)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:766)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$2(PartRenderingEngine.java:737)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$7.run(PartRenderingEngine.java:731)    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:715)    at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:68)    at org.eclipse.e4.ui.workbench.renderers.swt.WBWRenderer.processContents(WBWRenderer.java:664)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:674)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:766)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$2(PartRenderingEngine.java:737)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$7.run(PartRenderingEngine.java:731)    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:715)    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1078)    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(NativeMethodAccessorImpl.java:57)    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)    at java.lang.reflect.Method.invoke(Method.java:606)    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: org.eclipse.core.runtime.CoreException: Cannot determine URI for '/maentest/pom.xml'.    at org.eclipse.core.internal.filebuffers.ResourceFileBuffer.create(ResourceFileBuffer.java:238)    at org.eclipse.core.internal.filebuffers.TextFileBufferManager.connect(TextFileBufferManager.java:112)    at org.eclipse.ui.editors.text.TextFileDocumentProvider.createFileInfo(TextFileDocumentProvider.java:559)    at org.eclipse.ui.editors.text.TextFileDocumentProvider.connect(TextFileDocumentProvider.java:478)    at org.eclipse.ui.texteditor.AbstractTextEditor.doSetInput(AbstractTextEditor.java:4233)    at org.eclipse.ui.texteditor.StatusTextEditor.doSetInput(StatusTextEditor.java:237)    at org.eclipse.ui.texteditor.AbstractDecoratedTextEditor.doSetInput(AbstractDecoratedTextEditor.java:1480)    at org.eclipse.ui.editors.text.TextEditor.doSetInput(TextEditor.java:169)    at org.eclipse.wst.sse.ui.StructuredTextEditor.doSetInput(StructuredTextEditor.java:1943)    at org.eclipse.ui.texteditor.AbstractTextEditor$19.run(AbstractTextEditor.java:3220)    at org.eclipse.ui.internal.WorkbenchWindow.run(WorkbenchWindow.java:2099)    at org.eclipse.ui.texteditor.AbstractTextEditor.internalInit(AbstractTextEditor.java:3238)    ... 134 more!SUBENTRY 1 org.eclipse.core.filebuffers 4 0 2015-12-15 09:31:35.366

　　网上查了下说删除.metadata目录后重新导入项目即可，尝试了一下确实可行。但由于项目较多而且很多配置项需要重新配，这种情况下只好另觅道路了。既然删除.metada可以正常启动，如此可以推断只要将异常的项目从.metadata中移除即可。于是通过everything快速找到相应工程的文件将其一一删除，重启后还是不行。

　　于是通过sublime搜索.metadata下包含“maentest”的文件，并将相应的配置项一一删除。最后发现是eclipse加载界面配置文件workbench.xmi中的sharedElements配置项找不到相应的文件导致的异常。于是将对应的sharedElements删除，再次重启。路径\.metadata\.plugins\org.eclipse.e4.workbench，妥妥的。

　　找到相应的sharedElements将其删除

<sharedElements xsi:type="advanced:Area" xmi:id="_jXtqeaLJEeWtfsF9a_Yr8Q" elementId="org.eclipse.ui.editorss" selectedElement="_jXtqeqLJEeWtfsF9a_Yr8Q">      <children xsi:type="basic:PartStack" xmi:id="_jXtqeqLJEeWtfsF9a_Yr8Q" elementId="org.eclipse.e4.primaryDataStack" selectedElement="_jXtqe6LJEeWtfsF9a_Yr8Q">        <tags>newtablook</tags>        <tags>org.eclipse.e4.primaryDataStack</tags>        <tags>EditorStack</tags>        <tags>noFocus</tags>        <children xsi:type="basic:Part" xmi:id="_jXtqe6LJEeWtfsF9a_Yr8Q" elementId="org.eclipse.e4.ui.compatibility.editor" contributionURI="bundleclass://org.eclipse.ui.workbench/org.eclipse.ui.internal.e4.compatibility.CompatibilityEditor" label="maentest/pom.xml" iconURI="platform:/plugin/org.eclipse.m2e.editor/icons/editor-pom.gif" closeable="true">          <persistedState key="memento" value="&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?>&#xD;&#xA;&lt;editor id=&quot;org.eclipse.m2e.editor.MavenPomEditor&quot; name=&quot;pom.xml&quot; partName=&quot;maentest/pom.xml&quot; title=&quot;maentest/pom.xml&quot; tooltip=&quot;maentest/pom.xml&quot;>&#xD;&#xA;&lt;input factoryID=&quot;org.eclipse.ui.part.FileEditorInputFactory&quot; path=&quot;/maentest/pom.xml&quot;/>&#xD;&#xA;&lt;/editor>"/>          <tags>Editor</tags>          <tags>org.eclipse.m2e.editor.MavenPomEditor</tags>          <tags>removeOnHide</tags>          <menus xsi:type="menu:PopupMenu" xmi:id="_jXtqfKLJEeWtfsF9a_Yr8Q" elementId="org.eclipse.core.runtime.xml.source.EditorContext">            <tags>menuContribution:popup</tags>            <tags>popup:org.eclipse.core.runtime.xml.source.EditorContext</tags>            <tags>popup:.EditorContext</tags>            <tags>popup:#AbstractTextEditorContext</tags>          </menus>          <menus xsi:type="menu:PopupMenu" xmi:id="_jXtqfaLJEeWtfsF9a_Yr8Q" elementId="org.eclipse.core.runtime.xml.source.RulerContext">            <tags>menuContribution:popup</tags>            <tags>popup:org.eclipse.core.runtime.xml.source.RulerContext</tags>            <tags>popup:.RulerContext</tags>            <tags>popup:#AbstractTextEditorRulerContext</tags>          </menus>          <menus xsi:type="menu:PopupMenu" xmi:id="_jXtqfqLJEeWtfsF9a_Yr8Q" elementId="#OverviewRulerContext">            <tags>menuContribution:popup</tags>            <tags>popup:#OverviewRulerContext</tags>          </menus>          <menus xsi:type="menu:PopupMenu" xmi:id="_jXtqf6LJEeWtfsF9a_Yr8Q" elementId="org.eclipse.core.runtime.xml.source.EditorContext">            <tags>menuContribution:popup</tags>            <tags>popup:org.eclipse.core.runtime.xml.source.EditorContext</tags>            <tags>popup:.source.EditorContext</tags>            <tags>popup:org.eclipse.wst.sse.ui.StructuredTextEditor.EditorContext</tags>          </menus>          <menus xsi:type="menu:PopupMenu" xmi:id="_jXtqgKLJEeWtfsF9a_Yr8Q" elementId="org.eclipse.core.runtime.xml.source.RulerContext">            <tags>menuContribution:popup</tags>            <tags>popup:org.eclipse.core.runtime.xml.source.RulerContext</tags>            <tags>popup:.source.RulerContext</tags>            <tags>popup:org.eclipse.wst.sse.ui.StructuredTextEditor.RulerContext</tags>          </menus>          <menus xsi:type="menu:PopupMenu" xmi:id="_jXtqgaLJEeWtfsF9a_Yr8Q" elementId="org.eclipse.m2e.core.pomFile.source.EditorContext">            <tags>menuContribution:popup</tags>            <tags>popup:org.eclipse.m2e.core.pomFile.source.EditorContext</tags>            <tags>popup:org.eclipse.core.runtime.xml.source.EditorContext</tags>            <tags>popup:#AbstractTextEditorContext</tags>          </menus>          <menus xsi:type="menu:PopupMenu" xmi:id="_jXtqgqLJEeWtfsF9a_Yr8Q" elementId="org.eclipse.m2e.core.pomFile.source.RulerContext">            <tags>menuContribution:popup</tags>            <tags>popup:org.eclipse.m2e.core.pomFile.source.RulerContext</tags>            <tags>popup:org.eclipse.core.runtime.xml.source.RulerContext</tags>            <tags>popup:#AbstractTextEditorRulerContext</tags>          </menus>          <menus xsi:type="menu:PopupMenu" xmi:id="_jXtqg6LJEeWtfsF9a_Yr8Q" elementId="#OverviewRulerContext">            <tags>menuContribution:popup</tags>            <tags>popup:#OverviewRulerContext</tags>          </menus>          <menus xsi:type="menu:PopupMenu" xmi:id="_jXtqhKLJEeWtfsF9a_Yr8Q" elementId="org.eclipse.m2e.core.pomFile.source.EditorContext">            <tags>menuContribution:popup</tags>            <tags>popup:org.eclipse.m2e.core.pomFile.source.EditorContext</tags>            <tags>popup:org.eclipse.core.runtime.xml.source.source.EditorContext</tags>            <tags>popup:org.eclipse.wst.sse.ui.StructuredTextEditor.EditorContext</tags>          </menus>          <menus xsi:type="menu:PopupMenu" xmi:id="_jXtqhaLJEeWtfsF9a_Yr8Q" elementId="org.eclipse.m2e.core.pomFile.source.RulerContext">            <tags>menuContribution:popup</tags>            <tags>popup:org.eclipse.m2e.core.pomFile.source.RulerContext</tags>            <tags>popup:org.eclipse.core.runtime.xml.source.source.RulerContext</tags>            <tags>popup:org.eclipse.wst.sse.ui.StructuredTextEditor.RulerContext</tags>          </menus>        </children>      </children>    </sharedElements>

 　　删除后再次启动即可。