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Bug 353731

Summary:	[type hierarchy] Exception occurred in listener of Type hierarchy change notification
Product:	[Eclipse Project] JDT	Reporter:	Tomasz Zarna <tomasz.zarna>
Component:	UI	Assignee:	Raksha Vasisht <raksha.vasisht>
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	P3	CC:	amj87.iitr, daniel_megert
Version:	3.7
Target Milestone:	---
Hardware:	PC
OS:	Windows XP
Whiteboard:

Description Tomasz Zarna

2011-08-03 06:19:15 EDT

No steps, sorry. Noticed it in the Error Log an hour later.

-- Error Details --
Date: Wed Aug 03 11:10:31 CEST 2011
Message: Exception occurred in listener of Type hierarchy change notification
Severity: Error
Product: Eclipse SDK 3.7.0.v201107291200 (org.eclipse.sdk.ide)
Plugin: org.eclipse.jdt.core
Session Data:
eclipse.buildId=I20110729-1200
java.fullversion=JRE 1.6.0 IBM J9 2.4 Windows XP x86-32 jvmwi3260sr7-20091214_49398 (JIT enabled, AOT enabled)
J9VM - 20091214_049398
JIT  - r9_20091123_13891
GC   - 20091111_AA
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=pl_PL
Framework arguments:  -product org.eclipse.sdk.ide
Command-line arguments:  -product org.eclipse.sdk.ide -data D:\workspace\eclipse\web -dev file:D:/workspace/eclipse/team/dev.eclipse.org_HEAD_extssh/.metadata/.plugins/org.eclipse.pde.core/Eclipse (web)/dev.properties -os win32 -ws win32 -arch x86

Exception Stack Trace:
java.lang.NullPointerException
	at org.eclipse.jdt.internal.corext.util.SuperTypeHierarchyCache$HierarchyCacheEntry.dispose(SuperTypeHierarchyCache.java:57)
	at org.eclipse.jdt.internal.corext.util.SuperTypeHierarchyCache.removeHierarchyEntryFromCache(SuperTypeHierarchyCache.java:211)
	at org.eclipse.jdt.internal.corext.util.SuperTypeHierarchyCache.access$0(SuperTypeHierarchyCache.java:208)
	at org.eclipse.jdt.internal.corext.util.SuperTypeHierarchyCache$HierarchyCacheEntry.typeHierarchyChanged(SuperTypeHierarchyCache.java:41)
	at org.eclipse.jdt.internal.core.hierarchy.TypeHierarchy$1.run(TypeHierarchy.java:365)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.jdt.internal.core.hierarchy.TypeHierarchy.fireChange(TypeHierarchy.java:360)
	at org.eclipse.jdt.internal.core.DeltaProcessor$5.run(DeltaProcessor.java:1697)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.jdt.internal.core.DeltaProcessor.notifyTypeHierarchies(DeltaProcessor.java:1688)
	at org.eclipse.jdt.internal.core.DeltaProcessor.resourceChanged(DeltaProcessor.java:2081)
	at org.eclipse.jdt.internal.core.DeltaProcessingState.resourceChanged(DeltaProcessingState.java:470)
	at org.eclipse.core.internal.events.NotificationManager$1.run(NotificationManager.java:291)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:285)
	at org.eclipse.core.internal.events.NotificationManager.broadcastChanges(NotificationManager.java:149)
	at org.eclipse.core.internal.resources.Workspace.broadcastPostChange(Workspace.java:395)
	at org.eclipse.core.internal.resources.Workspace.endOperation(Workspace.java:1530)
	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2353)
	at org.eclipse.ui.actions.WorkspaceModifyOperation.run(WorkspaceModifyOperation.java:118)
	at org.eclipse.ui.internal.editors.text.WorkspaceOperationRunner.run(WorkspaceOperationRunner.java:75)
	at org.eclipse.ui.internal.editors.text.WorkspaceOperationRunner.run(WorkspaceOperationRunner.java:65)
	at org.eclipse.ui.editors.text.TextFileDocumentProvider.executeOperation(TextFileDocumentProvider.java:456)
	at org.eclipse.ui.editors.text.TextFileDocumentProvider.saveDocument(TextFileDocumentProvider.java:772)
	at org.eclipse.ui.texteditor.AbstractTextEditor.performSave(AbstractTextEditor.java:5048)
	at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor.performSave(CompilationUnitEditor.java:1247)
	at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor.doSave(CompilationUnitEditor.java:1301)
	at org.eclipse.ui.texteditor.AbstractTextEditor$TextEditorSavable.doSave(AbstractTextEditor.java:7177)
	at org.eclipse.ui.Saveable.doSave(Saveable.java:214)
	at org.eclipse.ui.internal.SaveableHelper.doSaveModel(SaveableHelper.java:349)
	at org.eclipse.ui.internal.SaveableHelper$3.run(SaveableHelper.java:195)
	at org.eclipse.ui.internal.SaveableHelper$5.run(SaveableHelper.java:277)
	at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:464)
	at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:372)
	at org.eclipse.jface.window.ApplicationWindow$1.run(ApplicationWindow.java:759)
	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
	at org.eclipse.jface.window.ApplicationWindow.run(ApplicationWindow.java:756)
	at org.eclipse.ui.internal.WorkbenchWindow.run(WorkbenchWindow.java:2642)
	at org.eclipse.ui.internal.SaveableHelper.runProgressMonitorOperation(SaveableHelper.java:285)
	at org.eclipse.ui.internal.SaveableHelper.runProgressMonitorOperation(SaveableHelper.java:264)
	at org.eclipse.ui.internal.SaveableHelper.saveModels(SaveableHelper.java:207)
	at org.eclipse.ui.internal.SaveableHelper.savePart(SaveableHelper.java:144)
	at org.eclipse.ui.internal.EditorManager.savePart(EditorManager.java:1399)
	at org.eclipse.ui.internal.WorkbenchPage.savePart(WorkbenchPage.java:3416)
	at org.eclipse.ui.internal.WorkbenchPage.saveEditor(WorkbenchPage.java:3429)
	at org.eclipse.ui.internal.handlers.SaveHandler.execute(SaveHandler.java:54)
	at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:293)
	at org.eclipse.core.commands.Command.executeWithChecks(Command.java:476)
	at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508)
	at org.eclipse.ui.internal.handlers.HandlerService.executeCommand(HandlerService.java:169)
	at org.eclipse.ui.internal.keys.WorkbenchKeyboard.executeCommand(WorkbenchKeyboard.java:468)
	at org.eclipse.ui.internal.keys.WorkbenchKeyboard.press(WorkbenchKeyboard.java:786)
	at org.eclipse.ui.internal.keys.WorkbenchKeyboard.processKeyEvent(WorkbenchKeyboard.java:885)
	at org.eclipse.ui.internal.keys.WorkbenchKeyboard.filterKeySequenceBindings(WorkbenchKeyboard.java:567)
	at org.eclipse.ui.internal.keys.WorkbenchKeyboard.access$3(WorkbenchKeyboard.java:508)
	at org.eclipse.ui.internal.keys.WorkbenchKeyboard$KeyDownFilter.handleEvent(WorkbenchKeyboard.java:123)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
	at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1262)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1052)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1066)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1062)
	at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1104)
	at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1098)
	at org.eclipse.swt.widgets.Widget.wmChar(Widget.java:1509)
	at org.eclipse.swt.widgets.Control.WM_CHAR(Control.java:4640)
	at org.eclipse.swt.widgets.Canvas.WM_CHAR(Canvas.java:345)
	at org.eclipse.swt.widgets.Control.windowProc(Control.java:4528)
	at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:341)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:4972)
	at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
	at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2531)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3752)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660)
	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494)
	at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123)
	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:344)
	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:48)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
	at java.lang.reflect.Method.invoke(Method.java:600)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1410)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1386)

Comment 1 Ayushman Jain

2011-08-03 06:40:17 EDT

Moving to JDT/UI for investigation

Comment 2 Dani Megert

2011-08-03 06:46:23 EDT

Raksha, please investigate.

Comment 3 Raksha Vasisht

2011-09-27 04:57:16 EDT

Fixed in org.eclipse.jdt.internal.corext.util.SuperTypeHierarchyCache. Couldn't reproduce the scenario where the type hierarchy is null when the cache entry is removed, even tried some odd scenarios. So just added check to avoid NPE.

Comment 4 Dani Megert

2011-09-27 09:13:09 EDT

(In reply to comment #3)
> Fixed in org.eclipse.jdt.internal.corext.util.SuperTypeHierarchyCache. Couldn't
> reproduce the scenario where the type hierarchy is null when the cache entry is
> removed, even tried some odd scenarios. So just added check to avoid NPE.

==> commit 4778eb29eb182b5bc283c46e59c6eafac8b2afe1