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Upon opening the schema editor, I receive the following exception in the log file. I am using Eclipse 3.0M2. If that matters, I may attach the schema file on demand. However, I have several schema files in the project and the problem seems to be the same for all files. java.lang.NullPointerException at org.eclipse.pde.internal.core.SourceDOMParser.startElement(SourceDOMParser.java:61) at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:313) at org.apache.xerces.impl.XMLNSDocumentScannerImpl$NSContentDispatcher.scanRootElementHook(XMLNSDocumentScannerImpl.java:610) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1608) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:346) at org.apache.xerces.parsers.DTDConfiguration.parse(DTDConfiguration.java:529) at org.apache.xerces.parsers.DTDConfiguration.parse(DTDConfiguration.java:585) at org.apache.xerces.parsers.XMLParser.parse(XMLParser.java:152) at org.apache.xerces.parsers.DOMParser.parse(DOMParser.java:253) at org.eclipse.pde.internal.core.schema.Schema.load(Schema.java:339) at org.eclipse.pde.internal.core.schema.Schema.load(Schema.java:327) at org.eclipse.pde.internal.core.schema.AbstractSchemaDescriptor.loadSchema(AbstractSchemaDescriptor.java:46) at org.eclipse.pde.internal.core.schema.AbstractSchemaDescriptor.getSchema(AbstractSchemaDescriptor.java:39) at org.eclipse.pde.internal.ui.editor.schema.SchemaEditor.createModel(SchemaEditor.java:49) at org.eclipse.pde.internal.ui.editor.PDEMultiPageEditor.initializeModels(PDEMultiPageEditor.java:495) at org.eclipse.pde.internal.ui.editor.PDEMultiPageEditor.init(PDEMultiPageEditor.java:472) at org.eclipse.ui.internal.EditorManager.createSite(EditorManager.java:604) at org.eclipse.ui.internal.EditorManager.openInternalEditor(EditorManager.java:666) at org.eclipse.ui.internal.EditorManager.openEditorFromDescriptor(EditorManager.java:459) at org.eclipse.ui.internal.EditorManager.openEditor(EditorManager.java:431) at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2069) at org.eclipse.ui.internal.WorkbenchPage.access$6(WorkbenchPage.java:2019) at org.eclipse.ui.internal.WorkbenchPage$9.run(WorkbenchPage.java:2006) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:84) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2001) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:1894) at org.eclipse.ui.actions.OpenWithMenu.openEditor(OpenWithMenu.java:237) at org.eclipse.ui.actions.OpenWithMenu.access$0(OpenWithMenu.java:231) at org.eclipse.ui.actions.OpenWithMenu$2.handleEvent(OpenWithMenu.java:155) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:848) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:2188) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:1878) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1680) at org.eclipse.ui.internal.Workbench.run(Workbench.java:1663) at org.eclipse.core.internal.boot.InternalBootLoader.run(InternalBootLoader.java:858) at org.eclipse.core.boot.BootLoader.run(BootLoader.java:461) 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:324) at org.eclipse.core.launcher.Main.basicRun(Main.java:291) at org.eclipse.core.launcher.Main.run(Main.java:747) at org.eclipse.core.launcher.Main.main(Main.java:583)
You must have another parser on your machine that is masking the one shipped in Eclipse, and hence is incompatible with pde code. What VM are you using?
Confirmed. The problem seems to be related to the XML parser: In my jre/lib/endorsed i have the Xerces parser which comes with JWSDP 1.2. If I remove that directory, everything works fine. Tried both JWSDP 1.1 and 1.2. Two things to consider: AFAIK the JWSDP parser will be bundled with future J2SE versions. In other words, it is likely that others will observe the same problem. Besides, the exception doesn't occur within the XML parser, but within application code. Personally I think that the UI team should seriously consider to take this as a bug. Conclusion: I am leaving the bug open until a member of the UI team decides to accept or close it.
Another example of the xerces.jar being masked by another one in the JRE. *** This bug has been marked as a duplicate of 39187 ***
