[Marc]

I have an issue which is causing me to have to reboot multiple times per day. When I first start MyEclipse, I can work with Ant build scripts, but it seems that MyEclipse will randomly throw the following exception when I close & reopen, or when I open a new Ant file. This only happens with Ant scripts. Other XML files open without an issue. Please advise.

Could not open the editor: org.apache.xerces.parsers.XIncludeAwareParserConfiguration cannot be cast to org.apache.xerces.xni.parser.XMLParserConfiguration

java.lang.ClassCastException: org.apache.xerces.parsers.XIncludeAwareParserConfiguration cannot be cast to org.apache.xerces.xni.parser.XMLParserConfiguration
    at org.apache.xerces.parsers.SAXParser.<init>(Unknown Source)
    at org.apache.xerces.parsers.SAXParser.<init>(Unknown Source)
    at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.<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:92)
    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.ComponentHelper.checkNamespace(ComponentHelper.java:790)
    at org.apache.tools.ant.ComponentHelper.getDefinition(ComponentHelper.java:260)
    at org.apache.tools.ant.ComponentHelper.createComponent(ComponentHelper.java:237)
    at org.apache.tools.ant.ComponentHelper.createComponent(ComponentHelper.java:216)
    at org.apache.tools.ant.UnknownElement.makeObject(UnknownElement.java:414)
    at org.apache.tools.ant.UnknownElement.maybeConfigure(UnknownElement.java:160)
    at org.eclipse.ant.internal.ui.model.AntPropertyNode.configure(AntPropertyNode.java:102)
    at org.eclipse.ant.internal.ui.model.AntModel.resolveBuildfile(AntModel.java:511)
    at org.eclipse.ant.internal.ui.model.AntModel.parseDocument(AntModel.java:331)
    at org.eclipse.ant.internal.ui.model.AntModel.reconcile(AntModel.java:267)
    at org.eclipse.ant.internal.ui.model.AntModel.getProjectNode(AntModel.java:1393)
    at org.eclipse.ant.internal.ui.model.AntModel.getProjectNode(AntModel.java:1403)
    at org.eclipse.ant.internal.ui.editor.text.AntFoldingStructureProvider.updateFoldingRegions(AntFoldingStructureProvider.java:88)
    at org.eclipse.ant.internal.ui.editor.AntEditor.projectionEnabled(AntEditor.java:1230)
    at org.eclipse.jface.text.source.projection.ProjectionViewer.fireProjectionEnabled(ProjectionViewer.java:488)
    at org.eclipse.jface.text.source.projection.ProjectionViewer.enableProjection(ProjectionViewer.java:536)
    at org.eclipse.jface.text.source.projection.ProjectionViewer.doOperation(ProjectionViewer.java:1440)
    at org.eclipse.ant.internal.ui.editor.AntEditor$StatusLineSourceViewer.doOperation(AntEditor.java:221)
    at org.eclipse.ant.internal.ui.editor.AntEditor.createPartControl(AntEditor.java:963)
    at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:662)
    at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:462)
    at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:595)
    at org.eclipse.ui.internal.EditorReference.getEditor(EditorReference.java:286)
    at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2857)
    at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2762)
    at org.eclipse.ui.internal.WorkbenchPage.access$11(WorkbenchPage.java:2754)
    at org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.java:2705)
    at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
    at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2701)
    at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2685)
    at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2676)
    at org.eclipse.ui.ide.IDE.openEditor(IDE.java:651)
    at org.eclipse.ui.ide.IDE.openEditor(IDE.java:610)
    at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:361)
    at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:168)
    at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:229)
    at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:208)
    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:373)
    at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart$4.open(PackageExplorerPart.java:526)
    at org.eclipse.ui.OpenAndLinkWithEditorHelper$InternalListener.open(OpenAndLinkWithEditorHelper.java:48)
    at org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:842)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.core.runtime.Platform.run(Platform.java:888)
    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:840)
    at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:1101)
    at org.eclipse.jface.viewers.StructuredViewer$6.handleOpen(StructuredViewer.java:1205)
    at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:264)
    at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:258)
    at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:298)
    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:3910)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3503)
    at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2405)
    at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2369)
    at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2221)
    at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:493)
    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:194)
    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:368)
    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:597)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:559)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1311)

[support-shalini]

MWThomson,
This seems to be an issue with the base eclipse. Can you try the workaround given in the following link and let me know if that works for you –
https://bugs.eclipse.org/bugs/show_bug.cgi?id=143008#c6

[Marc]

I tried removing the xerces jars, and so far, so good.

[support-shalini]

MWThomson,
Good to know that it is working.
Let us know if you have any issues

[Author]

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