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Created attachment 123765 [details] Sample Project Illustrating Behavior Build ID: CVS HEAD Steps To Reproduce: We have been tracking this exception in our server logs since the M4 release, and we have finally been able to reproduce it. I am not sure of all of the cases that you could reproduce this in, but if you throw an exception from a JFACE label provider during normal calls to getText() (etc.). You will get the following exception: ============================================== org.eclipse.swt.SWTException: Failed to execute runnable (java.lang.NullPointerException) at org.eclipse.swt.SWT.error(SWT.java:2572) at org.eclipse.swt.SWT.error(SWT.java:2492) at org.eclipse.rwt.internal.lifecycle.UICallBackManager.processNextRunnableInUIThread(UICallBackManager.java:167) at org.eclipse.rwt.internal.lifecycle.RWTLifeCycle.readAndDispatch(RWTLifeCycle.java:246) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:684) at org.eclipse.ui.application.WorkbenchAdvisor.openWindows(WorkbenchAdvisor.java:807) at org.eclipse.ui.internal.Workbench$25.runWithException(Workbench.java:1335) at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:32) at org.eclipse.rwt.internal.lifecycle.UICallBackManager.addSync(UICallBackManager.java:135) at org.eclipse.swt.widgets.Display$2.run(Display.java:651) at org.eclipse.rwt.internal.lifecycle.UICallBackServiceHandler.runNonUIThreadWithFakeContext(UICallBackServiceHandler.java:455) at org.eclipse.rwt.lifecycle.UICallBack.runNonUIThreadWithFakeContext(UICallBack.java:44) at org.eclipse.swt.widgets.Display.syncExec(Display.java:649) at org.eclipse.ui.internal.StartupThreading.runWithoutExceptions(StartupThreading.java:110) at org.eclipse.ui.internal.Workbench.init(Workbench.java:1330) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2309) at org.eclipse.ui.internal.Workbench.access$5(Workbench.java:2200) at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:425) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:333) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:408) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:157) at bugdemo.Application.createUI(Application.java:75) at org.eclipse.rwt.internal.lifecycle.EntryPointManager.createUI(EntryPointManager.java:92) at org.eclipse.rwt.internal.lifecycle.RWTLifeCycle.createUI(RWTLifeCycle.java:229) at org.eclipse.rwt.internal.lifecycle.RWTLifeCycle$UIThreadController.run(RWTLifeCycle.java:116) at java.lang.Thread.run(Thread.java:619) Caused by: java.lang.NullPointerException at org.eclipse.ui.statushandlers.WorkbenchStatusDialogManager.refreshSingleStatusArea(WorkbenchStatusDialogManager.java:1948) at org.eclipse.ui.statushandlers.WorkbenchStatusDialogManager.updateTitleArea(WorkbenchStatusDialogManager.java:2199) at org.eclipse.ui.statushandlers.WorkbenchStatusDialogManager.refresh(WorkbenchStatusDialogManager.java:1931) at org.eclipse.ui.statushandlers.WorkbenchStatusDialogManager.access$32(WorkbenchStatusDialogManager.java:1924) at org.eclipse.ui.statushandlers.WorkbenchStatusDialogManager$5.run(WorkbenchStatusDialogManager.java:1069) at org.eclipse.rwt.internal.lifecycle.UICallBackManager$RunnableBase.run(UICallBackManager.java:50) at org.eclipse.rwt.internal.lifecycle.UICallBackManager.processNextRunnableInUIThread(UICallBackManager.java:165) ... 23 more at org.eclipse.ui.statushandlers.WorkbenchStatusDialogManager$5.run(WorkbenchStatusDialogManager.java:1069) at org.eclipse.rwt.internal.lifecycle.UICallBackManager$RunnableBase.run(UICallBackManager.java:50) at org.eclipse.rwt.internal.lifecycle.UICallBackManager.processNextRunnableInUIThread(UICallBackManager.java:165) ... 23 more =========================================== Another version we get is: org.eclipse.swt.SWTException: Failed to execute runnable (java.lang.NullPointerException) at org.eclipse.swt.SWT.error(SWT.java:2572) at org.eclipse.swt.SWT.error(SWT.java:2492) at org.eclipse.rwt.internal.lifecycle.UICallBackManager.processNextRunnableInUIThread(UICallBackManager.java:167) at org.eclipse.rwt.internal.lifecycle.RWTLifeCycle.afterPhaseExecution(RWTLifeCycle.java:406) at org.eclipse.rwt.internal.lifecycle.RWTLifeCycle.continueLifeCycle(RWTLifeCycle.java:191) at org.eclipse.rwt.internal.lifecycle.RWTLifeCycle$UIThreadController.run(RWTLifeCycle.java:117) at java.lang.Thread.run(Unknown Source) Caused by: java.lang.NullPointerException at org.eclipse.ui.statushandlers.WorkbenchStatusDialogManager.refreshSingleStatusArea(WorkbenchStatusDialogManager.java:1948) at org.eclipse.ui.statushandlers.WorkbenchStatusDialogManager.updateTitleArea(WorkbenchStatusDialogManager.java:2199) at org.eclipse.ui.statushandlers.WorkbenchStatusDialogManager.refresh(WorkbenchStatusDialogManager.java:1931) at org.eclipse.ui.statushandlers.WorkbenchStatusDialogManager.access$32(WorkbenchStatusDialogManager.java:1924) at org.eclipse.ui.statushandlers.WorkbenchStatusDialogManager$5.run(WorkbenchStatusDialogManager.java:1069) at org.eclipse.rwt.internal.lifecycle.UICallBackManager$RunnableBase.run(UICallBackManager.java:50) at org.eclipse.rwt.internal.lifecycle.UICallBackManager.processNextRunnableInUIThread(UICallBackManager.java:165) ... 4 more ====================================================== The attached project illustrates the behavior.
This is a Platform bug: 238738: [StatusHandling] Still an NPE in WorkbenchStatusDialogManager.refreshSingleStatusArea(..) https://bugs.eclipse.org/bugs/show_bug.cgi?id=238738 This will be fixed when we adopt the new platform code. In the meantime you could use the patch attached to the original bug report. Not sure whether we commit the patch to our codebase.
Created attachment 125760 [details] Fix The patch from [Bug 238738] ported to RAP CVS HEAD.
Committed the patch from Vasko
