简而言之：看看下面的粗体部分是否可以节省您的时间:-)
（此答案可能会有所帮助，但仍未找到源问题。如果令人满意地解决，我将更新我的发现。）
<更新...>
更新：它再次发生并发生在所有其他文件下方的一个 XML 文件（Tomcats content.xml）的拖动/定位。（由“XML 编辑器”打开：Provider: Eclipse Web Tools Platform, Plug-in Name: XML editor, Version: 1.0.700.v201005192212, Plug-in Id: org.eclipse.wst.xmleditor.doc.user）
update2：在进一步调查时，当我将编辑器移回其他文件（一个区域中所有打开的编辑器）时，错误消失了。此外，它仅在进入或离开此 XML 编辑器时出现，而不是在例如对其进行更改并通过 CRTL+S 保存时出现。除了下面的 JBoss 相关异常发生在 CTRL+S 事件上之外，但与此问题无关（因此它可能根本不相关）。
update3：越来越近：因为一段时间以来，出现了一个新的编辑器定位功能。（最初我有点困惑，但现在我明白了，甚至可以从视觉上看出是什么意思以及有什么不同......）。因此，有两种方法可以将编辑器垂直或水平放置在其他编辑器旁边：
- 将其定位在同一个“面板”内（由一个全局和两个内部面板/边框/矩形围绕编辑器表示）和
- 将其放置在旧“面板”旁边（由旧面板和新面板周围的矩形框表示。
因此，将编辑器放入新的“全局”面板 (2.) 效果很好，将其放入新的“本地”面板 (1.) 会导致问题
（这实际上非常有帮助，因为我仍然可以继续非常有效地工作）（也许其他人可以适当地报告这个错误）（它似乎也与上面提到的 XML 编辑器无关，因为它也发生在例如属性文件上）
更新 4：我在休眠模式下使用 Windows 7。这意味着我不经常启动我的 Eclipse。现在我意识到Eclipse 本身已经启动了 2 次（查看任务管理器）（视觉上并使用 ALT+TAB 进行打开的窗口导航，这并不明显）。（停止/杀死所有打开的实例并）重新启动后，问题不再发生。
更新 5：在这个重复的问题中，有人说它可以通过最新的 Windows 更新解决：https ://stackoverflow.com/a/19316804/1915920 。我会自己检查一下，但目前我无论如何都无法重现该问题。
更新 6：在另一种情况下，我遇到了这个问题，它似乎与某个属性窗口（在本例中为 Jasper Reports）有关，该窗口根据当前编辑器（如大纲视图）自动更新其内容。因此，关闭并重新打开（所有）大纲和/或属性窗口可能是个好主意。
</...更新>
该错误通常表明，某些程序（可能）打开了异常多（可能数千？）的操作系统文件句柄。所以应该检查Eclipse外部或内部是否有很多文件同时打开或在短时间内打开，但没有正确关闭（它们可以在视觉上关闭，但操作系统仍然认为它们正在被使用因为应用程序没有以某种方式正确释放文件句柄）。
现在我目前也有这个问题。如果我查看错误日志（Window->Show View->General->Error Log），我可以在之前看到很多以下 org.jboss.ide.eclipse.archives.core.* 异常。由于我现在不使用已安装的 JBoss Developer Studio 插件（可能与此插件相关），并且没有打开任何关联的窗口或编辑器（只有一些工具栏“JBoss Central”和透视“JBoss”按钮）我会有看看如果禁用这些将有助于解决这个零星的问题。此外，我关闭了所有打开的编辑器，重新启动 Eclipse 并打开它们，现在再也看不到这个问题了。
Problems occurred when invoking code from plug-in: "org.eclipse.core.resources".
...
java.lang.NullPointerException
at org.jboss.ide.eclipse.archives.core.WorkspaceChangeListener$2.visit(WorkspaceChangeListener.java:74)
at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:69)
at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:49)
at org.jboss.ide.eclipse.archives.core.WorkspaceChangeListener.resourceChanged(WorkspaceChangeListener.java:70)
at org.eclipse.core.internal.events.NotificationManager$1.run(NotificationManager.java:291)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:285)
at org.eclipse.core.internal.events.NotificationManager.broadcastChanges(NotificationManager.java:149)
at org.eclipse.core.internal.resources.Workspace.broadcastPostChange(Workspace.java:396)
at org.eclipse.core.internal.resources.Workspace.endOperation(Workspace.java:1531)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2354)
at org.eclipse.ui.actions.WorkspaceModifyOperation.run(WorkspaceModifyOperation.java:118)
at org.eclipse.ui.internal.editors.text.WorkspaceOperationRunner.run(WorkspaceOperationRunner.java:75)
at org.eclipse.ui.internal.editors.text.WorkspaceOperationRunner.run(WorkspaceOperationRunner.java:65)
at org.eclipse.ui.editors.text.TextFileDocumentProvider.executeOperation(TextFileDocumentProvider.java:456)
at org.eclipse.ui.editors.text.TextFileDocumentProvider.saveDocument(TextFileDocumentProvider.java:772)
at org.eclipse.ui.texteditor.AbstractTextEditor.performSave(AbstractTextEditor.java:5068)
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.jboss.tools.common.editor.ObjectMultiPageEditor.saveX(ObjectMultiPageEditor.java:403)
at org.jboss.tools.common.editor.ObjectMultiPageEditor.doSave(ObjectMultiPageEditor.java:385)
at org.eclipse.ui.internal.SaveableHelper$2.run(SaveableHelper.java:150)
at org.eclipse.ui.internal.SaveableHelper$5.run(SaveableHelper.java:276)
at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:464)
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:372)
at org.eclipse.ui.internal.WorkbenchWindow$13.run(WorkbenchWindow.java:1812)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.ui.internal.WorkbenchWindow.run(WorkbenchWindow.java:1809)
at org.eclipse.ui.internal.SaveableHelper.runProgressMonitorOperation(SaveableHelper.java:284)
at org.eclipse.ui.internal.SaveableHelper.runProgressMonitorOperation(SaveableHelper.java:263)
at org.eclipse.ui.internal.SaveableHelper.savePart(SaveableHelper.java:155)
at org.eclipse.ui.internal.WorkbenchPage.saveSaveable(WorkbenchPage.java:3777)
at org.eclipse.ui.internal.WorkbenchPage.saveEditor(WorkbenchPage.java:3790)
at org.jboss.tools.common.model.ui.texteditors.SaveAction3.run(PropertiesTextEditorComponent.java:357)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:499)
at org.eclipse.jface.commands.ActionHandler.execute(ActionHandler.java:119)
at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:90)
at sun.reflect.GeneratedMethodAccessor58.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:56)
at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:243)
at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:224)
at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:132)
at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:167)
at org.eclipse.core.commands.Command.executeWithChecks(Command.java:499)
at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508)
at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:213)
at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.executeCommand(KeyBindingDispatcher.java:285)
at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.press(KeyBindingDispatcher.java:504)
at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.processKeyEvent(KeyBindingDispatcher.java:555)
at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.filterKeySequenceBindings(KeyBindingDispatcher.java:376)
at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.access$0(KeyBindingDispatcher.java:322)
at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher$KeyDownFilter.handleEvent(KeyBindingDispatcher.java:84)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1262)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1056)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1081)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1066)
at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1108)
at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1104)
at org.eclipse.swt.widgets.Widget.wmChar(Widget.java:1525)
at org.eclipse.swt.widgets.Control.WM_CHAR(Control.java:4723)
at org.eclipse.swt.widgets.Canvas.WM_CHAR(Canvas.java:344)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4611)
at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:340)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4977)
at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2549)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3757)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1113)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:997)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:138)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:610)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:567)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:354)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:181)
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:636)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591)
at org.eclipse.equinox.launcher.Main.run(Main.java:1450)
at org.eclipse.equinox.launcher.Main.main(Main.java:1426)
...
eclipse.buildId=4.3.0.I20130605-2000
java.version=1.7.0_25
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=de_DE
Framework arguments: -product org.eclipse.epp.package.reporting.product
Command-line arguments: -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.reporting.product
已安装插件（帮助->关于 Eclipse->安装详细信息->已安装软件：全部标记 + CTRL+C）：（Eclipse Kepler Java EE 和 BIRT 版本作为基础安装）
Apache Directory Studio LDAP Browser 2.0.0.v20130628 org.apache.directory.studio.ldapbrowser.feature.feature.group Apache Software Foundation
DevUtilsFeature 1.0.9.201209201734 DevUtilsFeature.feature.group null
Eclipse IDE for Java and Report Developers 2.0.0.20130613-0530 epp.package.reporting null
GlassFish Tools 6.2.0.201307232054 oracle.eclipse.tools.glassfish.feature.group Oracle
JarPlug 0.6.1 com.simontuffs.eclipse.jarplug.feature.feature.group simontuffs.com
Jaspersoft Studio feature 5.2.0 com.jaspersoft.studio.feature.feature.group Jaspersoft Corporation
Java EE 5 Documentation 6.2.0.201307232054 oracle.eclipse.tools.javaee.doc.v5.feature.group Oracle
Java EE 6 Documentation 6.2.0.201307232054 oracle.eclipse.tools.javaee.doc.v6.feature.group Oracle
Java EE 7 Documentation 6.2.0.201307232054 oracle.eclipse.tools.javaee.doc.v7.feature.group Oracle
JBoss Developer Studio (Core Features) 7.0.0.GA-v20130720-0044-B364 com.jboss.jbds.product.feature.feature.group JBoss by Red Hat
Log Viewer Feature 0.9.8.8 de.anbos.eclipse.logviewer.feature.feature.group Andre Bossert
MercurialEclipse 2.1.0.201304290948 mercurialeclipse.feature.group MercurialEclipse project
MyLV 1.0.4 mylv_feature.feature.group null
Oracle ADF Documentation (11.1.1.4) 6.2.0.201307232054 oracle.eclipse.tools.adf.doc.v11114.feature.group Oracle
Oracle ADF Documentation (11.1.1.5) 6.2.0.201307232054 oracle.eclipse.tools.adf.doc.v11115.feature.group Oracle
Oracle ADF Documentation (11.1.1.6) 6.2.0.201307232054 oracle.eclipse.tools.adf.doc.v11116.feature.group Oracle
Oracle ADF Documentation (11.1.1.7) 6.2.0.201307232054 oracle.eclipse.tools.adf.doc.v11117.feature.group Oracle
Oracle ADF Documentation (12.1.2) 6.2.0.201307232054 oracle.eclipse.tools.adf.doc.v1212.feature.group Oracle
Oracle ADF Tools 6.2.0.201307232054 oracle.eclipse.tools.adf.feature.group Oracle
Oracle Cloud Tools 6.2.0.201307232054 oracle.eclipse.tools.cloud.feature.group Oracle
Oracle Coherence Tools 6.2.0.201307232054 oracle.eclipse.tools.coherence.feature.group Oracle
Oracle Database Tools 6.2.0.201307232054 oracle.eclipse.tools.database.feature.group Oracle
Oracle Java EE Tools 6.2.0.201307232054 oracle.eclipse.tools.javaee.feature.group Oracle
Oracle Maven Tools 6.2.0.201307232054 oracle.eclipse.tools.maven.feature.group Oracle
Oracle Spring Tools 6.2.0.201307232054 oracle.eclipse.tools.spring.feature.group Oracle
Oracle WebLogic Scripting Tools 6.2.0.201307232054 oracle.eclipse.tools.weblogic.scripting.feature.group Oracle
Oracle WebLogic Server Tools 6.2.0.201307232054 oracle.eclipse.tools.weblogic.feature.group Oracle
Toad® Extension for Eclipse - Community Edition - Core Plugin 1.8.3.201308140922 com.quest.toadext.core.feature.feature.group Quest Software, Inc.
Toad® Extension for Eclipse - Community Edition - MySQL DB Plugin 1.8.3.201308140922 com.quest.toadext.mysql.feature.feature.group Quest Software, Inc.
Toad® Extension for Eclipse - Community Edition - Oracle Database Plugin 1.8.3.201308140922 com.quest.toadext.feature.feature.group Quest Software, Inc.
Toad® Extension for Eclipse - Community Edition - PostgreSQL Plugin 1.8.3.201308140922 com.quest.toadext.postgre.feature.feature.group Quest Software, Inc.
