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If a Review Group creation is cancelled, later review group creations will cause the following exception. A selection on the navigator of the created reviews group will also trigger the same exception. !ENTRY org.eclipse.ui.views.properties.tabbed 4 2 2011-11-22 13:58:26.990 !MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.ui.views.properties.tabbed". !STACK 0 java.lang.IllegalArgumentException: Argument cannot be null at org.eclipse.swt.SWT.error(SWT.java:4064) at org.eclipse.swt.SWT.error(SWT.java:3998) at org.eclipse.swt.SWT.error(SWT.java:3969) at org.eclipse.swt.widgets.Widget.error(Widget.java:468) at org.eclipse.swt.widgets.Text.setText(Text.java:1951) at org.eclipse.mylyn.reviews.r4e.ui.internal.properties.tabbed.ReviewGroupTabPropertySection.refresh(ReviewGroupTabPropertySection.java:465) at org.eclipse.ui.views.properties.tabbed.TabContents$6.run(TabContents.java:217) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49) at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175) at org.eclipse.ui.views.properties.tabbed.TabContents.refresh(TabContents.java:220) at org.eclipse.ui.views.properties.tabbed.TabbedPropertySheetPage$SelectionChangedListener.selectionChanged(TabbedPropertySheetPage.java:222) at org.eclipse.jface.viewers.Viewer$2.run(Viewer.java:162) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49) at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175) at org.eclipse.jface.viewers.Viewer.fireSelectionChanged(Viewer.java:160) at org.eclipse.jface.viewers.StructuredViewer.updateSelection(StructuredViewer.java:2162) at org.eclipse.jface.viewers.StructuredViewer.setSelection(StructuredViewer.java:1699) at org.eclipse.jface.viewers.Viewer.setSelection(Viewer.java:392) at org.eclipse.ui.views.properties.tabbed.TabbedPropertySheetPage.setInput(TabbedPropertySheetPage.java:736) at org.eclipse.ui.views.properties.tabbed.TabbedPropertySheetPage.selectionChanged(TabbedPropertySheetPage.java:555) at org.eclipse.ui.views.properties.PropertySheet.selectionChanged(PropertySheet.java:365) at org.eclipse.ui.internal.AbstractSelectionService.firePostSelection(AbstractSelectionService.java:179) at org.eclipse.ui.internal.AbstractSelectionService$2.selectionChanged(AbstractSelectionService.java:71) at org.eclipse.jface.viewers.StructuredViewer$3.run(StructuredViewer.java:867) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49) at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175) at org.eclipse.jface.viewers.StructuredViewer.firePostSelectionChanged(StructuredViewer.java:865) at org.eclipse.jface.viewers.StructuredViewer.setSelection(StructuredViewer.java:1700) at org.eclipse.jface.viewers.TreeViewer.setSelection(TreeViewer.java:1139) at org.eclipse.mylyn.reviews.r4e.ui.internal.navigator.ReviewNavigatorView.updateView(ReviewNavigatorView.java:840) at org.eclipse.mylyn.reviews.r4e.ui.internal.utils.UIUtils.setNavigatorViewFocus(UIUtils.java:602) at org.eclipse.mylyn.reviews.r4e.ui.internal.commands.NewChildElementHandler$1.runInUIThread(NewChildElementHandler.java:90) at org.eclipse.ui.progress.UIJob$1.run(UIJob.java:95) at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35) at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:134) at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4041) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3660) 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:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:620) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:575) at org.eclipse.equinox.launcher.Main.run(Main.java:1408) at org.eclipse.equinox.launcher.Main.main(Main.java:1384)
After troubleshooting the issue, the problems lies on ReviewGroupInputDialog.java#buttonPressed(int), see last "else" statement. if the button pressed was not ok, several field values are reset to "null" however the default values for this fields are empty strings. This causes new groups to be created e.g. null default entry criteria. When the properties are being read and the null is applied to a text box, the exception will occur. the solution is to reset the fields to their empty string default.
Implemented as mentioned in comment above
