Error when modifying tag in web.xml

EXEC: in #1 workspace create dynamic web project with web.xml like this: web.xml <?xml version= "1.0" encoding= "UTF-8" ?> <web-app xmlns:xsi= "http: //www.w3.org/2001/XMLSchema-instance" xmlns= "http://java.sun.com/xml/ns/javaee" xmlns:web= "http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation= "http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version= "3.0" > <display-name>project</display-name> <servlet> <description>JAX-RS Tools Generated - Do not modify</description> <servlet-name>JAX-RS Servlet</servlet-name> <servlet- class& gt;MyApplication</servlet- class& gt; <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>JAX-RS Servlet</servlet-name> <url-pattern>/jaxrs/*</url-pattern> </servlet-mapping> </web-app> EXEC: open #2 fresh workspace, import the project from #1 workspace (configure targeted runtime for the project to avoid error) EXEC: open web.xml, modify end tag '</web-app>' to '/web-app>' EXEC: save the file ERROR: error is thrown: org.eclipse.emf.ecore.resource.impl.ResourceSetImpl$1DiagnosticWrappedException: org.xml.sax.SAXParseException: XML document structures must start and end within the same entity. at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.handleDemandLoadException(ResourceSetImpl.java:319) at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.demandLoadHelper(ResourceSetImpl.java:278) at org.eclipse.jem.internal.util.emf.workbench.ProjectResourceSetImpl.getResource(ProjectResourceSetImpl.java:1003) at org.eclipse.jst.jee.model.internal.JEE5ModelProvider.getModelResource(JEE5ModelProvider.java:169) at org.eclipse.jst.jee.model.internal.Web25ModelProvider.getModelObject(Web25ModelProvider.java:44) at org.eclipse.jst.jee.model.internal.JEE5ModelProvider.getModelObject(JEE5ModelProvider.java:215) at org.eclipse.jst.jee.model.internal.common.AbstractMergedModelProvider.loadProviders(AbstractMergedModelProvider.java:261) at org.eclipse.jst.jee.model.internal.common.AbstractMergedModelProvider.access$2(AbstractMergedModelProvider.java:255) at org.eclipse.jst.jee.model.internal.common.AbstractMergedModelProvider$LoadModelsWorkspaceRunnable.run(AbstractMergedModelProvider.java:278) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2345) at org.eclipse.jst.jee.model.internal.common.AbstractMergedModelProvider.loadModel(AbstractMergedModelProvider.java:249) at org.eclipse.jst.jee.model.internal.common.AbstractMergedModelProvider.getMergedModel(AbstractMergedModelProvider.java:219) at org.eclipse.jst.jee.model.internal.common.AbstractMergedModelProvider.getModelObject(AbstractMergedModelProvider.java:139) at org.eclipse.jst.jee.ui.internal.navigator.JEE5ContentProvider.getCachedContentProvider(JEE5ContentProvider.java:98) at org.eclipse.jst.jee.ui.internal.navigator.Web25ContentProvider.getChildren(Web25ContentProvider.java:35) at org.eclipse.ui.internal.navigator.extensions.SafeDelegateTreeContentProvider.getChildren(SafeDelegateTreeContentProvider.java:96) at org.eclipse.ui.internal.navigator.extensions.SafeDelegateTreeContentProvider.getChildren(SafeDelegateTreeContentProvider.java:275) at org.eclipse.ui.internal.navigator.extensions.SafeDelegateTreeContentProvider.getChildren(SafeDelegateTreeContentProvider.java:94) at org.eclipse.ui.internal.navigator.NavigatorContentServiceContentProvider$1.run(NavigatorContentServiceContentProvider.java:152) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.ui.internal.navigator.NavigatorContentServiceContentProvider.internalGetChildren(NavigatorContentServiceContentProvider.java:139) at org.eclipse.ui.internal.navigator.NavigatorContentServiceContentProvider.getChildren(NavigatorContentServiceContentProvider.java:125) at org.eclipse.jface.viewers.AbstractTreeViewer.getRawChildren(AbstractTreeViewer.java:1367) at org.eclipse.jface.viewers.TreeViewer.getRawChildren(TreeViewer.java:391) at org.eclipse.jface.viewers.StructuredViewer.getFilteredChildren(StructuredViewer.java:917) at org.eclipse.jface.viewers.AbstractTreeViewer.getSortedChildren(AbstractTreeViewer.java:620) at org.eclipse.jface.viewers.AbstractTreeViewer.updateChildren(AbstractTreeViewer.java:2643) at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefreshStruct(AbstractTreeViewer.java:1923) at org.eclipse.jface.viewers.TreeViewer.internalRefreshStruct(TreeViewer.java:721) at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefresh(AbstractTreeViewer.java:1898) at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefresh(AbstractTreeViewer.java:1855) at org.eclipse.ui.navigator.CommonViewer.internalRefresh(CommonViewer.java:561) at org.eclipse.jface.viewers.StructuredViewer$8.run(StructuredViewer.java:1535) at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1443) at org.eclipse.jface.viewers.TreeViewer.preservingSelection(TreeViewer.java:403) at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1404) at org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:1533) at org.eclipse.jface.viewers.ColumnViewer.refresh(ColumnViewer.java:548) at org.eclipse.ui.navigator.CommonViewer.refresh(CommonViewer.java:350) at org.eclipse.ui.navigator.CommonViewer.refresh(CommonViewer.java:510) at org.eclipse.jst.jee.ui.internal.navigator.JEE5ContentProvider$1.run(JEE5ContentProvider.java:145) at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35) at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135) at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3680) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3329) at org.eclipse.ui.internal.dialogs.EventLoopProgressMonitor.runEventLoop(EventLoopProgressMonitor.java:123) at org.eclipse.ui.internal.dialogs.EventLoopProgressMonitor.beginTask(EventLoopProgressMonitor.java:66) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2336) 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(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.jboss.tools.common.editor.ObjectMultiPageEditor.saveX(ObjectMultiPageEditor.java:403) at org.jboss.tools.common.editor.ObjectMultiPageEditor.doSave(ObjectMultiPageEditor.java:385) at org.jboss.tools.common.model.ui.editor.EditorPartWrapper.doSave(EditorPartWrapper.java:235) at org.eclipse.ui.internal.SaveableHelper$2.run(SaveableHelper.java:151) at org.eclipse.ui.internal.SaveableHelper$5.run(SaveableHelper.java:274) 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:1671) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) at org.eclipse.ui.internal.WorkbenchWindow.run(WorkbenchWindow.java:1668) at org.eclipse.ui.internal.SaveableHelper.runProgressMonitorOperation(SaveableHelper.java:282) at org.eclipse.ui.internal.SaveableHelper.runProgressMonitorOperation(SaveableHelper.java:261) at org.eclipse.ui.internal.SaveableHelper.savePart(SaveableHelper.java:156) at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.doSave(CompatibilityPart.java:417) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:56) at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:231) at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:237) at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:201) at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:89) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.savePart(PartServiceImpl.java:1223) at org.eclipse.ui.internal.WorkbenchPage.saveSaveable(WorkbenchPage.java:3437) at org.eclipse.ui.internal.WorkbenchPage.saveEditor(WorkbenchPage.java:3455) at org.jboss.tools.common.model.ui.texteditors.SaveAction2.run(XMLTextEditorComponent.java:465) 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:76) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:56) at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:231) at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:212) at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:131) at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:171) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.executeCommand(KeyBindingDispatcher.java:277) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.press(KeyBindingDispatcher.java:496) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.processKeyEvent(KeyBindingDispatcher.java:547) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.filterKeySequenceBindings(KeyBindingDispatcher.java:368) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.access$0(KeyBindingDispatcher.java:314) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher$KeyDownFilter.handleEvent(KeyBindingDispatcher.java:83) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1552) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1391) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1416) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1401) at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1428) at org.eclipse.swt.widgets.Widget.gtk_key_press_event(Widget.java:829) at org.eclipse.swt.widgets.Control.gtk_key_press_event(Control.java:3180) at org.eclipse.swt.widgets.Composite.gtk_key_press_event(Composite.java:758) at org.eclipse.swt.widgets.Widget.windowProc(Widget.java:2092) at org.eclipse.swt.widgets.Control.windowProc(Control.java:5334) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4532) at org.eclipse.swt.internal.gtk.OS._gtk_main_do_event(Native Method) at org.eclipse.swt.internal.gtk.OS.gtk_main_do_event(OS.java:8549) at org.eclipse.swt.widgets.Display.eventProc(Display.java:1241) at org.eclipse.swt.internal.gtk.OS._g_main_context_iteration(Native Method) at org.eclipse.swt.internal.gtk.OS.g_main_context_iteration(OS.java:2281) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3324) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1057) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:941) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:79) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:588) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:543) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) 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(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) 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) Caused by: org.xml.sax.SAXParseException: XML document structures must start and end within the same entity. at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:195) at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(ErrorHandlerWrapper.java:174) at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:388) at com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFatalError(XMLScanner.java:1414) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.endEntity(XMLDocumentFragmentScannerImpl.java:905) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.endEntity(XMLDocumentScannerImpl.java:605) at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.endEntity(XMLEntityManager.java:1393) at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.load(XMLEntityScanner.java:1763) at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.skipChar(XMLEntityScanner.java:1416) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2793) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:140) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:511) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:808) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737) at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:119) at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205) at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522) at javax.xml.parsers.SAXParser.parse(SAXParser.java:395) at org.eclipse.emf.ecore.xmi.impl.XMLLoadImpl.load(XMLLoadImpl.java:175) at org.eclipse.emf.ecore.xmi.impl.XMLResourceImpl.doLoad(XMLResourceImpl.java:253) at org.eclipse.emf.ecore.resource.impl.ResourceImpl.load(ResourceImpl.java:1529) at org.eclipse.emf.ecore.resource.impl.ResourceImpl.load(ResourceImpl.java:1308) at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.demandLoad(ResourceSetImpl.java:259) at org.eclipse.jem.internal.util.emf.workbench.ProjectResourceSetImpl.demandLoad(ProjectResourceSetImpl.java:811) at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.demandLoadHelper(ResourceSetImpl.java:274) ... 141 more