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Build ID: Eclipse Platform Version: 3.4.1 Build id: M20080911-1700 Steps To Reproduce: 1. Double click on build.xml in a module in the workspace 2. Look at tab where the file is supposed to open, just get a stack trace. It's a difficult issue to reproduce. it seems to be tied to running a diff with CVS (Compare with latest from HEAD). Or after running a "Build with Ant". The work around is to stop eclipse and then start it up again. It's very annoying after a while. More information: java.lang.ClassCastException: org.apache.xerces.parsers.XML11Configuration at org.apache.xerces.parsers.SAXParser.<init>(Unknown Source) at org.apache.xerces.parsers.SAXParser.<init>(Unknown Source) at org.apache.xerces.jaxp.SAXParserImpl.<init>(Unknown Source) at org.apache.xerces.jaxp.SAXParserFactoryImpl.newSAXParser(Unknown Source) at org.apache.tools.ant.util.JAXPUtils.newSAXParser(JAXPUtils.java:215) at org.apache.tools.ant.util.JAXPUtils.getNamespaceXMLReader(JAXPUtils.java:172) at org.apache.tools.ant.helper.ProjectHelper2.parse(ProjectHelper2.java:185) at org.apache.tools.ant.helper.ProjectHelper2.parseUnknownElement(ProjectHelper2.java:86) at org.apache.tools.ant.taskdefs.Antlib.createAntlib(Antlib.java:75) at org.apache.tools.ant.taskdefs.Definer.loadAntlib(Definer.java:429) at org.apache.tools.ant.taskdefs.Definer.execute(Definer.java:281) at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288) at org.eclipse.ant.internal.ui.model.AntDefiningTaskNode.configure(AntDefiningTaskNode.java:86) at org.eclipse.ant.internal.ui.model.AntModel.resolveBuildfile(AntModel.java:504) at org.eclipse.ant.internal.ui.model.AntModel.resolveBuildfile(AntModel.java:506) at org.eclipse.ant.internal.ui.model.AntModel.parseDocument(AntModel.java:329) at org.eclipse.ant.internal.ui.model.AntModel.reconcile(AntModel.java:265) at org.eclipse.ant.internal.ui.model.AntModel.getProjectNode(AntModel.java:1386) at org.eclipse.ant.internal.ui.model.AntModel.getProjectNode(AntModel.java:1396) at org.eclipse.ant.internal.ui.editor.text.AntFoldingStructureProvider.updateFoldingRegions(AntFoldingStructureProvider.java:88) at org.eclipse.ant.internal.ui.editor.AntEditor.projectionEnabled(AntEditor.java:1243) at org.eclipse.jface.text.source.projection.ProjectionViewer.fireProjectionEnabled(ProjectionViewer.java:480) at org.eclipse.jface.text.source.projection.ProjectionViewer.enableProjection(ProjectionViewer.java:528) at org.eclipse.jface.text.source.projection.ProjectionViewer.doOperation(ProjectionViewer.java:1413) at org.eclipse.ant.internal.ui.editor.AntEditor$StatusLineSourceViewer.doOperation(AntEditor.java:215) at org.eclipse.ant.internal.ui.editor.AntEditor.createPartControl(AntEditor.java:971) at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:661) at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:428) at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:594) at org.eclipse.ui.internal.EditorReference.getEditor(EditorReference.java:266) at org.eclipse.ui.internal.EditorManager.findEditor(EditorManager.java:403) at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2766) at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2729) at org.eclipse.ui.internal.WorkbenchPage.access$11(WorkbenchPage.java:2721) at org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.java:2673) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2668) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2652) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2643) at org.eclipse.ui.ide.IDE.openEditor(IDE.java:646) at org.eclipse.ui.ide.IDE.openEditor(IDE.java:605) at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:318) at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:160) at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:228) at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:207) at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:274) at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:250) at org.eclipse.jdt.internal.ui.packageview.PackageExplorerActionGroup.handleOpen(PackageExplorerActionGroup.java:363) at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart$5.open(PackageExplorerPart.java:603) at org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:820) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37) at org.eclipse.core.runtime.Platform.run(Platform.java:880) at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:48) at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175) at org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:818) at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:1079) at org.eclipse.jface.viewers.StructuredViewer$6.handleOpen(StructuredViewer.java:1183) at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:263) at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:257) at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:297) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3823) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3422) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2382) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2346) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2198) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:493) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:488) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193) 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:386) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179) 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:585) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:549) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504) at org.eclipse.equinox.launcher.Main.run(Main.java:1236)
Axel, you have hit a known problem: bug 152793. See https://bugs.eclipse.org/bugs/show_bug.cgi?id=143008#c6 for workarounds. *** This bug has been marked as a duplicate of bug 152793 ***
