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Linux/eclipse oxygen/project errors

I'm new to Linux(in general, but Mint specifically), but was able to muddle through getting eclipse to open (Java version openjdk version "9-internal"), Running Eclipse Oxygen1.A. (I had to end up editing the eclipse.ini as mentioned in some other posts to get the application to start (eg: remove -add ALL MODULES, etc.)
The program starts fine now, but get the following errors when creating a project: (see below)
I've tried creating new workspaces, without any luck.. I was attempting to create a Java9 project, but also tried creating Java8 projects just for measure..
Any recommendations or suggestions?
Thanks in advance for any/all suggestions.
(PS: probably worth mentioning my core experience is in Windows, and I've configured the new Oxygen/Java9 in the windows 10 OS to behave as expected..)
Exception:java.lang.NullPointerException: null
at org.eclipse.jdt.internal.compiler.util.JRTUtil.walkModuleImage(JRTUtil.java:146)
at org.eclipse.jdt.internal.core.JavaProject.loadModulesInJimage(JavaProject.java:876)
at org.eclipse.jdt.internal.core.JavaProject.computePackageFragmentRoots(JavaProject.java:680)
at org.eclipse.jdt.internal.core.JavaProject.computePackageFragmentRoots(JavaProject.java:963)
at org.eclipse.jdt.internal.core.JavaProject.computePackageFragmentRoots(JavaProject.java:922)
at org.eclipse.jdt.internal.core.JavaProject.buildStructure(JavaProject.java:477)
at org.eclipse.jdt.internal.core.Openable.generateInfos(Openable.java:259)
at org.eclipse.jdt.internal.core.JavaElement.openWhenClosed(JavaElement.java:583)
at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:320)
at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:306)
at org.eclipse.jdt.internal.core.JavaElement.getChildren(JavaElement.java:261)
at org.eclipse.jdt.internal.core.JavaProject.getPackageFragmentRoots(JavaProject.java:2143)
at org.eclipse.jdt.internal.ui.packageview.PackageExplorerContentProvider.getPackageFragmentRoots(PackageExplorerContentProvider.java:308)
at org.eclipse.jdt.ui.StandardJavaElementContentProvider.getChildren(StandardJavaElementContentProvider.java:180)
at org.eclipse.jdt.internal.ui.packageview.PackageExplorerContentProvider.getChildren(PackageExplorerContentProvider.java:295)
at org.eclipse.jface.viewers.AbstractTreeViewer.getRawChildren(AbstractTreeViewer.java:1363)
at org.eclipse.jface.viewers.TreeViewer.getRawChildren(TreeViewer.java:341)
at org.eclipse.jdt.internal.ui.viewsupport.ProblemTreeViewer.getFilteredChildren(ProblemTreeViewer.java:251)
at org.eclipse.jface.viewers.AbstractTreeViewer.getSortedChildren(AbstractTreeViewer.java:618)
at org.eclipse.jface.viewers.AbstractTreeViewer.lambda$0(AbstractTreeViewer.java:814)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:792)
at org.eclipse.jface.viewers.TreeViewer.createChildren(TreeViewer.java:595)
at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:763)
at org.eclipse.jface.viewers.AbstractTreeViewer.setExpandedState(AbstractTreeViewer.java:2459)
at org.eclipse.jdt.internal.ui.packageview.PackageExplorerActionGroup.handleDoubleClick(PackageExplorerActionGroup.java:355)
at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart$3.doubleClick(PackageExplorerPart.java:518)
at org.eclipse.jface.viewers.StructuredViewer$1.run(StructuredViewer.java:831)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.ui.internal.JFaceUtil.lambda$0(JFaceUtil.java:44)
at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:173)
at org.eclipse.jface.viewers.StructuredViewer.fireDoubleClick(StructuredViewer.java:828)
at org.eclipse.jface.viewers.AbstractTreeViewer.handleDoubleSelect(AbstractTreeViewer.java:1459)
at org.eclipse.jface.viewers.StructuredViewer$4.widgetDefaultSelected(StructuredViewer.java:1258)
at org.eclipse.jface.util.OpenStrategy.fireDefaultSelectionEvent(OpenStrategy.java:249)
at org.eclipse.jface.util.OpenStrategy.access$0(OpenStrategy.java:247)
at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:306)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:86)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:5268)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1348)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4522)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4107)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1150)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1039)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:153)
at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:680)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:594)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:151)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)
at sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-2)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:531)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:653)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:590)
at org.eclipse.equinox.launcher.Main.run(Main.java:1499)
at org.eclipse.equinox.launcher.Main.main(Main.java:1472)

Fixed!
When using the Oomph installer for Eclipse, needed to point to the newly installed JDK9.0.1.... For whatever reason the "openJDK 9-Interal" that was present/defaulting wasn't working...
If anyone else struggles with a similar issue setting up eclipse on Mint, I recommend getting a clean/fresh JDK off of java.com, and carefully configure the Oomph installer (make sure both are 64-bit), and point it to this JDK instead of the default..

Unhandled event loop exception and Editor could not be initialized in LibreOffice Extension Java Eclipse project

I just started developing desktop application which can communicate to libreoffice of linux using libreoffice extensions.
I am trying to run Github LibreOffice Extension Code Sample.
Its showing error "Editor could not be initialized" and log below.
java.lang.NullPointerException
at org.openoffice.ide.eclipse.core.editors.RegDocumentProvider.createDocument(RegDocumentProvider.java:98)
at org.eclipse.ui.editors.text.FileDocumentProvider.createElementInfo(FileDocumentProvider.java:721)
at org.eclipse.ui.texteditor.AbstractDocumentProvider.connect(AbstractDocumentProvider.java:392)
at org.eclipse.ui.texteditor.AbstractTextEditor.doSetInput(AbstractTextEditor.java:4178)
at org.eclipse.ui.texteditor.StatusTextEditor.doSetInput(StatusTextEditor.java:229)
at org.eclipse.ui.texteditor.AbstractDecoratedTextEditor.doSetInput(AbstractDecoratedTextEditor.java:1466)
at org.eclipse.ui.editors.text.TextEditor.doSetInput(TextEditor.java:150)
at org.eclipse.ui.texteditor.AbstractTextEditor$5.run(AbstractTextEditor.java:3154)
at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:437)
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:353)
at org.eclipse.ui.internal.WorkbenchWindow$14.run(WorkbenchWindow.java:2184)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.ui.internal.WorkbenchWindow.run(WorkbenchWindow.java:2180)
Its also showing some U letter on the project folder and D letter on types.rdb file below in blue colour. What does that mean?
While running this project its showing error "Unhandled event loop exception" and error log below.
java.lang.NullPointerException
at org.libreoffice.ide.eclipse.core.launch.office.OfficeLaunchShortcut.createDefaultLaunchConfiguration(Unknown Source)
at org.libreoffice.ide.eclipse.core.launch.office.OfficeLaunchShortcut.launch(Unknown Source)
at org.libreoffice.ide.eclipse.core.launch.office.OfficeLaunchShortcut.launch(Unknown Source)
at org.eclipse.debug.internal.ui.launchConfigurations.LaunchShortcutExtension.launch(LaunchShortcutExtension.java:431)
at org.eclipse.debug.internal.ui.actions.LaunchShortcutAction.runInternal(LaunchShortcutAction.java:85)
at org.eclipse.debug.internal.ui.actions.LaunchShortcutAction.runWithEvent(LaunchShortcutAction.java:135)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:565)
at org.eclipse.jface.action.ActionContributionItem.lambda$4(ActionContributionItem.java:397)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:5227)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1340)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1366)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1349)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1134)
at org.eclipse.jface.action.ActionContributionItem.lambda$8(ActionContributionItem.java:1258)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:5227)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1340)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4561)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4151)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1121)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1022)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:150)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:693)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:610)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:138)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:673)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:610)
at org.eclipse.equinox.launcher.Main.run(Main.java:1519)
at org.eclipse.equinox.launcher.Main.main(Main.java:1492)
I tried creating some sample project using File->New->Project->OpenOffice->Extension Project. Still getting those same error below.
Also I tried this and this but still no positive result.
Any help would greatly appreciated.
Thanks

Error was due to project was runnning as LibreOffice Extension.
To solve the issue I created a new configuration with name LibreOffice Application (Instead of extension). Its running smoothly now.

Java lambda expression and switch statement cause eclipse to crash normal?

I just can't figure out what is causing a stackoverflow problem in eclipse. Well actually I do know, but I don't know why. I've tried the below:
Restarted my computer - duh
Eclipse.exe -clean
Reinstalled a new eclipse
Tested the exact same code every time, each time the exact same code appears to crash eclipse. The code is a lambda expression. Which is all fine until I press the period key "." for code completion within a switch statement.
My code is:
albumList.getSelectionModel().selectedItemProperty()
.addListener((ObservableValue obs, AbstractAlbum oldAlbum, AbstractAlbum selectedAlbum) -> {
switch (type){
test. // It doesn't matter what variable I use, valid or not, after the dot, eclipse crashes
}
});
I can't find anything wrong with my code. I followed this tutorial here: http://code.makery.ch/java/javafx-8-tutorial-intro/ which also has a lambda expression. I attempted to add a switch to this code and again it crashed:
lastNameColumn.setCellValueFactory(cellData -> {
switch (type){
test. // again it crashed after a dot
}
});
Can someone please confirm whether they can replicate this? I'm using a fresh Eclipse: Luna for java developer 64x - the latest package. Here is the log from eclipse:
!ENTRY org.eclipse.ui 4 0 2014-11-28 22:19:08.889
!MESSAGE Unhandled event loop exception
!STACK 0
org.eclipse.swt.SWTException: Failed to execute runnable (java.lang.StackOverflowError)
at org.eclipse.swt.SWT.error(SWT.java:4441)
at org.eclipse.swt.SWT.error(SWT.java:4356)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:139)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4147)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3764)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1151)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1032)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:148)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:636)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:579)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:135)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235)
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:648)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603)
at org.eclipse.equinox.launcher.Main.run(Main.java:1465)
Caused by: java.lang.StackOverflowError
at org.eclipse.jdt.internal.codeassist.UnresolvedReferenceNameFinder.visit(UnresolvedReferenceNameFinder.java:292)
at org.eclipse.jdt.internal.compiler.ast.Block.traverse(Block.java:138)
at org.eclipse.jdt.internal.compiler.ast.Initializer.traverse(Initializer.java:130)
at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.traverse(TypeDeclaration.java:1427)
at org.eclipse.jdt.internal.compiler.ast.QualifiedAllocationExpression.traverse(QualifiedAllocationExpression.java:603)
at org.eclipse.jdt.internal.compiler.ast.LambdaExpression.traverse(LambdaExpression.java:645)
at org.eclipse.jdt.internal.compiler.ast.MessageSend.traverse(MessageSend.java:1015)
at org.eclipse.jdt.internal.compiler.ast.MethodDeclaration.traverse(MethodDeclaration.java:347)
at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.traverse(TypeDeclaration.java:1434)
at org.eclipse.jdt.internal.compiler.ast.QualifiedAllocationExpression.traverse(QualifiedAllocationExpression.java:603)
at org.eclipse.jdt.internal.compiler.ast.LambdaExpression.traverse(LambdaExpression.java:645)
at org.eclipse.jdt.internal.compiler.ast.MessageSend.traverse(MessageSend.java:1015)
at org.eclipse.jdt.internal.compiler.ast.MethodDeclaration.traverse(MethodDeclaration.java:347)
at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.traverse(TypeDeclaration.java:1434)
at org.eclipse.jdt.internal.compiler.ast.QualifiedAllocationExpression.traverse(QualifiedAllocationExpression.java:603)
at org.eclipse.jdt.internal.compiler.ast.LambdaExpression.traverse(LambdaExpression.java:645)
at org.eclipse.jdt.internal.compiler.ast.MessageSend.traverse(MessageSend.java:1015)
at org.eclipse.jdt.internal.compiler.ast.MethodDeclaration.traverse(MethodDeclaration.java:347)
at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.traverse(TypeDeclaration.java:1434)
at org.eclipse.jdt.internal.compiler.ast.QualifiedAllocationExpression.traverse(QualifiedAllocationExpression.java:603)

Maybe time heals all wounds? :-)
I use Eclipse Neon 3 and all content assist with Java 8 works fine....

Classloading conflict with two eclipse plugins

Following situation:
At work we have an own plugin that extends some JDT features and builds some helper functions for our own framework. So far so good.
The plugin includes following class:
public class MoxLogFactory extends org.apache.commons.logging.LogFactory {
...
}
(I left out the concrete implementation because it's really comprehensive)
Now I added the WindowBuilder-Plugin to my eclipse installation. I can create new projects and classes with the wizards included. But the main feature - the editor himself - isn't working. It comes out, that the WindowBuilder tries to load the class "MoxLogFactory" from our plugin! I attached the stacktrace which comes up if I open the editor:
java.lang.ClassNotFoundException: org.dreamox.moxanos.log.MoxLogFactory
at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:501)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:421)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:412)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at org.apache.commons.logging.LogFactory.createFactory(LogFactory.java:1261)
at org.apache.commons.logging.LogFactory$2.run(LogFactory.java:1065)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.commons.logging.LogFactory.newFactory(LogFactory.java:1062)
at org.apache.commons.logging.LogFactory.getFactory(LogFactory.java:497)
at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:704)
at org.apache.commons.digester.Digester.<init>(Digester.java:340)
at org.eclipse.wb.internal.core.model.description.helpers.ComponentDescriptionHelper.getDescription0(ComponentDescriptionHelper.java:375)
at org.eclipse.wb.internal.core.model.description.helpers.ComponentDescriptionHelper.getDescription0(ComponentDescriptionHelper.java:289)
at org.eclipse.wb.internal.core.model.description.helpers.ComponentDescriptionHelper.getDescription(ComponentDescriptionHelper.java:258)
at org.eclipse.wb.internal.core.model.JavaInfoUtils.createJavaInfo(JavaInfoUtils.java:386)
at org.eclipse.wb.internal.rcp.parser.ParseFactory.getRootContext(ParseFactory.java:184)
at org.eclipse.wb.internal.core.parser.JavaInfoParser.prepareParseContext(JavaInfoParser.java:1185)
at org.eclipse.wb.internal.core.parser.JavaInfoParser.parse(JavaInfoParser.java:244)
at org.eclipse.wb.internal.core.parser.JavaInfoParser.access$9(JavaInfoParser.java:240)
at org.eclipse.wb.internal.core.parser.JavaInfoParser$1.runObject(JavaInfoParser.java:153)
at org.eclipse.wb.internal.core.parser.JavaInfoParser$1.runObject(JavaInfoParser.java:1)
at org.eclipse.wb.internal.core.utils.execution.ExecutionUtils.runDesignTime(ExecutionUtils.java:153)
at org.eclipse.wb.internal.core.parser.JavaInfoParser.parse(JavaInfoParser.java:151)
at org.eclipse.wb.internal.core.editor.DesignPage.internal_refreshGEF(DesignPage.java:522)
at org.eclipse.wb.internal.core.editor.DesignPage.access$9(DesignPage.java:510)
at org.eclipse.wb.internal.core.editor.DesignPage$8$1.run(DesignPage.java:437)
at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:180)
at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:150)
at org.eclipse.swt.widgets.Display.syncExec(Display.java:4683)
at org.eclipse.wb.internal.core.editor.DesignPage$8.run(DesignPage.java:434)
at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:464)
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:372)
at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:507)
at org.eclipse.wb.internal.core.editor.DesignPage.internal_refreshGEF_withProgress(DesignPage.java:453)
at org.eclipse.wb.internal.core.editor.DesignPage.internal_refreshGEF(DesignPage.java:403)
at org.eclipse.wb.internal.core.editor.UndoManager.refreshDesignerEditor(UndoManager.java:381)
at org.eclipse.wb.internal.core.editor.UndoManager.activate(UndoManager.java:90)
at org.eclipse.wb.internal.core.editor.DesignPage.handleActiveState_True(DesignPage.java:251)
at org.eclipse.wb.internal.core.editor.DesignPage.handleActiveState(DesignPage.java:229)
at org.eclipse.wb.internal.core.editor.multi.DefaultMultiMode.showPage(DefaultMultiMode.java:125)
at org.eclipse.wb.internal.core.editor.multi.DefaultMultiMode$1.widgetSelected(DefaultMultiMode.java:63)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:240)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1077)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1062)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:774)
at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:2746)
at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:1433)
at org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:257)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4165)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:999)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:893)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:85)
at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:579)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:534)
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:352)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
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:624)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:579)
at org.eclipse.equinox.launcher.Main.run(Main.java:1433)
at org.eclipse.equinox.launcher.Main.main(Main.java:1409)
Our plugin doesn't export anything, so why is the WindowBuilder trying to load a class from it? Where do it gets the information to load this class? If I uninstall our plugin the WindowBuilder works fine, but I need both plugins to work efficiently.
I found, that in MoxLogFactory in one static method there is a line
System.setProperty("org.apache.commons.logging.LogFactory","org.dreamox.moxanos.log.MoxLogFactory");
I thought every plugin runs in a sandbox and so this isn't really a problem, but when I see the stacktrace, it seems, that this system property is "global in eclipse". The MoxLogFactory class is also used in our application server framework so this code is needed - the plugin uses the framework itself to work.
I don't know how to solve this problem and would appreciate any hint or idea.

Here are some options:
Remove that static initialization of the JVM level system property and replace it by a command line option only when needed
In your static initializer, test Eclipse execution context by asking the ClassLoader for org.eclipse.equinox.launcher.Main class for instance, and if so, do not set the logfactory property

System properties belong to the JVM, not to a class loader. By setting your logger as a System property, presumably so that it will be loaded automatically, you have told the entire system to use it. When the other plugin loads and attempts to initialize its logging (which appears to also use Apache Commons Logging), it reads the System property, attempts to load the class found therein, and promptly fails because it cannot see into your plugin.

Eclipse refactoring fails -> Keeps throwing exceptions!

I'm using Eclipse Helios and for every refactoring that spans multiple files it plainly fails! Nothing happens. On examining the logs here's the error that I see:
!ENTRY org.eclipse.ltk.ui.refactoring 4 10000 2011-03-13 14:15:31.842
!MESSAGE Internal Error
!STACK 0
java.lang.reflect.InvocationTargetException
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:421)
at org.eclipse.ltk.internal.ui.refactoring.RefactoringWizardDialog2.run(RefactoringWizardDialog2.java:330)
at org.eclipse.ltk.ui.refactoring.RefactoringWizard.internalPerformFinish(RefactoringWizard.java:573)
at org.eclipse.ltk.ui.refactoring.UserInputWizardPage.performFinish(UserInputWizardPage.java:153)
at org.eclipse.jdt.internal.ui.refactoring.reorg.RenameTypeWizardInputPage.performFinish(RenameTypeWizardInputPage.java:144)
at org.eclipse.ltk.ui.refactoring.RefactoringWizard.performFinish(RefactoringWizard.java:646)
at org.eclipse.ltk.internal.ui.refactoring.RefactoringWizardDialog2.okPressed(RefactoringWizardDialog2.java:454)
at org.eclipse.jface.dialogs.Dialog.buttonPressed(Dialog.java:472)
at org.eclipse.jface.dialogs.Dialog$2.widgetSelected(Dialog.java:624)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:234)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4066)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3657)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:825)
at org.eclipse.jface.window.Window.open(Window.java:801)
at org.eclipse.ltk.ui.refactoring.RefactoringWizardOpenOperation$1.run(RefactoringWizardOpenOperation.java:180)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.ltk.ui.refactoring.RefactoringWizardOpenOperation.run(RefactoringWizardOpenOperation.java:192)
at org.eclipse.ltk.ui.refactoring.RefactoringWizardOpenOperation.run(RefactoringWizardOpenOperation.java:115)
at org.eclipse.jdt.internal.ui.refactoring.actions.RefactoringStarter.activate(RefactoringStarter.java:38)
at org.eclipse.jdt.internal.ui.refactoring.UserInterfaceStarter.activate(UserInterfaceStarter.java:62)
at org.eclipse.jdt.internal.ui.refactoring.reorg.RenameUserInterfaceStarter.activate(RenameUserInterfaceStarter.java:31)
at org.eclipse.jdt.ui.refactoring.RenameSupport.openDialog(RenameSupport.java:159)
at org.eclipse.jdt.ui.refactoring.RenameSupport.openDialog(RenameSupport.java:116)
at org.eclipse.jdt.internal.corext.refactoring.RefactoringExecutionStarter.startRenameRefactoring(RefactoringExecutionStarter.java:438)
at org.eclipse.jdt.internal.ui.refactoring.actions.RenameJavaElementAction.run(RenameJavaElementAction.java:203)
at org.eclipse.jdt.internal.ui.refactoring.actions.RenameJavaElementAction.run(RenameJavaElementAction.java:101)
at org.eclipse.jdt.ui.actions.RenameAction.run(RenameAction.java:108)
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.jface.action.Action.runWithEvent(Action.java:498)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)
at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4066)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3657)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2640)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:115)
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:369)
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:619)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)
at org.eclipse.equinox.launcher.Main.run(Main.java:1407)
Caused by: java.lang.NoClassDefFoundError: org/eclipse/jst/jsp/core/internal/java/search/JSPIndexManager
at org.eclipse.jst.jsp.core.internal.java.search.JSPSearchSupport.searchRunnable(JSPSearchSupport.java:424)
at org.eclipse.jst.jsp.core.internal.java.search.JSPSearchSupport.searchRunnable(JSPSearchSupport.java:349)
at org.eclipse.jst.jsp.ui.internal.java.refactoring.JSPRenameParticipant.createChangesFor(JSPRenameParticipant.java:215)
at org.eclipse.jst.jsp.ui.internal.java.refactoring.JSPRenameParticipant.createChange(JSPRenameParticipant.java:153)
at org.eclipse.ltk.core.refactoring.participants.ProcessorBasedRefactoring.createChange(ProcessorBasedRefactoring.java:308)
at org.eclipse.ltk.core.refactoring.CreateChangeOperation.run(CreateChangeOperation.java:124)
at org.eclipse.ltk.core.refactoring.PerformChangeOperation.run(PerformChangeOperation.java:209)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1975)
at org.eclipse.ltk.internal.ui.refactoring.WorkbenchRunnableAdapter.run(WorkbenchRunnableAdapter.java:87)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)
Root exception:
java.lang.NoClassDefFoundError: org/eclipse/jst/jsp/core/internal/java/search/JSPIndexManager
at org.eclipse.jst.jsp.core.internal.java.search.JSPSearchSupport.searchRunnable(JSPSearchSupport.java:424)
at org.eclipse.jst.jsp.core.internal.java.search.JSPSearchSupport.searchRunnable(JSPSearchSupport.java:349)
at org.eclipse.jst.jsp.ui.internal.java.refactoring.JSPRenameParticipant.createChangesFor(JSPRenameParticipant.java:215)
at org.eclipse.jst.jsp.ui.internal.java.refactoring.JSPRenameParticipant.createChange(JSPRenameParticipant.java:153)
at org.eclipse.ltk.core.refactoring.participants.ProcessorBasedRefactoring.createChange(ProcessorBasedRefactoring.java:308)
at org.eclipse.ltk.core.refactoring.CreateChangeOperation.run(CreateChangeOperation.java:124)
at org.eclipse.ltk.core.refactoring.PerformChangeOperation.run(PerformChangeOperation.java:209)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1975)
at org.eclipse.ltk.internal.ui.refactoring.WorkbenchRunnableAdapter.run(WorkbenchRunnableAdapter.java:87)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)
This error doesn't make much sense for me to be able to navigate around and even 'try' fixing it. For refactorings that are 'local' to the file/methods it seems to work fine. I've tried figuring this one out but just aghast! I tend to use the refactor feature A LOT. I'm working with J2EE + Glassfish v3. I have JARs for freemarker, restlet and that for DBUtils on the build path.
Any ideas? Has anyone encountered (and fixed :) this problem??
Thanks in advance!

Looks like a plugin issue. The root exception is,
Caused by: java.lang.NoClassDefFoundError: org/eclipse/jst/jsp/core/internal/java/search/JSPIndexManager
Meaning some class that should exist can't be found. Have you recently installed/removed plugins? You might have to reinstall eclipse.

Since I only had 2 plugins it was easy to figure out the problem. It seems there is a dependency conflict between JBoss and Glassfish Plugins (says so on update). Removing the JBoss Plugin (Help > Eclipse MarketPlace > Installed - select a plugin, click 'uninstall' and select all the components in it and click Next/Finish).
That seemed to fix the refactoring without reinstalling. Thanks to user654801 for pointing it out as a plug-in issue. It'd have been difficult to nail it down otherwise!

I have the same problem. I solve it similarly to Nupul.
I disabled the J2EE standard tools sience i don't need them:
Eclipse Europa:
Help -> Sowtware Updates -> Manage Configuration
disable J2EE Standard Tools (JST) Project SDK