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Bug 173714 - [console] NPEs under JavaStackTracePageParticipant while debugging
Summary: [console] NPEs under JavaStackTracePageParticipant while debugging
Status: RESOLVED DUPLICATE of bug 146825
Alias: None
Product: JDT
Classification: Eclipse Project
Component: Debug (show other bugs)
Version: 3.3   Edit
Hardware: PC Windows XP
: P3 normal (vote)
Target Milestone: 3.4   Edit
Assignee: JDT-Debug-Inbox CLA
QA Contact:
URL:
Whiteboard:
Keywords:
: 185184 193125 220976 (view as bug list)
Depends on:
Blocks:
 
Reported: 2007-02-09 18:14 EST by Walter Harley CLA
Modified: 2008-02-29 14:26 EST (History)
7 users (show)

See Also:

Attachments
stack trace (5.19 KB, text/plain)
2007-04-02 19:33 EDT, Walter Harley CLA 		no flags Details
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Description Walter Harley CLA 2007-02-09 18:14:45 EST 
I've been seeing a lot of exceptions in I20070208-0010 as I launch Eclipse applications in the debugger and attempt to debug them.  (I don't know how long this has been going on but I don't remember seeing it in M4.)  All seem to point to an NPE underneath org.eclipse.jdt.internal.debug.ui.console.JavaStackTracePageParticipant.

I'll try and attach a clean repro scenario if I find one but wanted to report this ASAP in the meanwhile.

Here are the stack traces from two of them:

org.eclipse.swt.SWTException: Failed to execute runnable (java.lang.NullPointerException)
	at org.eclipse.swt.SWT.error(SWT.java:3478)
	at org.eclipse.swt.SWT.error(SWT.java:3401)
	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:126)
	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3467)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3107)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2264)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2228)
	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2103)
	at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:457)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:452)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:101)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:146)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:354)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:169)
	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:476)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:416)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1124)
Caused by: java.lang.NullPointerException
	at org.eclipse.ui.internal.handlers.HandlerService.deactivateHandler(HandlerService.java:138)
	at org.eclipse.jdt.internal.debug.ui.console.JavaStackTracePageParticipant.deactivated(JavaStackTracePageParticipant.java:94)
	at org.eclipse.ui.internal.console.ConsoleView.deactivateParticipants(ConsoleView.java:609)
	at org.eclipse.ui.internal.console.ConsoleView.showPageRec(ConsoleView.java:153)
	at org.eclipse.ui.part.PageBookView.partClosed(PageBookView.java:768)
	at org.eclipse.ui.internal.console.ConsoleView.partClosed(ConsoleView.java:116)
	at org.eclipse.ui.internal.console.ConsoleView$2.run(ConsoleView.java:373)
	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:123)
	... 22 more

================================================================
Here's another instance, caused by clicking on the evaluation window in the variables pane while stopped at a breakpoint in the debugger:

java.lang.NullPointerException
	at org.eclipse.ui.internal.handlers.HandlerService.deactivateHandler(HandlerService.java:138)
	at org.eclipse.jdt.internal.debug.ui.console.JavaStackTracePageParticipant.deactivated(JavaStackTracePageParticipant.java:94)
	at org.eclipse.ui.internal.console.ConsoleView.deactivateParticipants(ConsoleView.java:609)
	at org.eclipse.ui.internal.console.ConsoleView.partDeactivated(ConsoleView.java:575)
	at org.eclipse.ui.internal.PartListenerList2$4.run(PartListenerList2.java:113)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
	at org.eclipse.core.runtime.Platform.run(Platform.java:850)
	at org.eclipse.ui.internal.PartListenerList2.fireEvent(PartListenerList2.java:53)
	at org.eclipse.ui.internal.PartListenerList2.firePartDeactivated(PartListenerList2.java:111)
	at org.eclipse.ui.internal.PartService.firePartDeactivated(PartService.java:116)
	at org.eclipse.ui.internal.PartService.setActivePart(PartService.java:165)
	at org.eclipse.ui.internal.WorkbenchPagePartList.fireActivePartChanged(WorkbenchPagePartList.java:56)
	at org.eclipse.ui.internal.PartList.setActivePart(PartList.java:126)
	at org.eclipse.ui.internal.WorkbenchPage.setActivePart(WorkbenchPage.java:3258)
	at org.eclipse.ui.internal.WorkbenchPage.requestActivation(WorkbenchPage.java:2773)
	at org.eclipse.ui.internal.PartPane.requestActivation(PartPane.java:265)
	at org.eclipse.ui.internal.PartPane.handleEvent(PartPane.java:229)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:938)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:962)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:943)
	at org.eclipse.swt.widgets.Shell.setActiveControl(Shell.java:1272)
	at org.eclipse.swt.widgets.Shell.WM_MOUSEACTIVATE(Shell.java:2014)
	at org.eclipse.swt.widgets.Control.windowProc(Control.java:3515)
	at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1554)
	at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:1752)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:4172)
	at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
	at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2195)
	at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:77)
	at org.eclipse.swt.widgets.Control.windowProc(Control.java:3562)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:4172)
	at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
	at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2195)
	at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:77)
	at org.eclipse.swt.widgets.Control.windowProc(Control.java:3562)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:4172)
	at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
	at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2195)
	at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:77)
	at org.eclipse.swt.widgets.Control.windowProc(Control.java:3562)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:4172)
	at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
	at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2195)
	at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:77)
	at org.eclipse.swt.widgets.Control.windowProc(Control.java:3562)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:4172)
	at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
	at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2195)
	at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:77)
	at org.eclipse.swt.widgets.Control.windowProc(Control.java:3562)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:4172)
	at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
	at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2195)
	at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:77)
	at org.eclipse.swt.widgets.Control.windowProc(Control.java:3562)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:4172)
	at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
	at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2195)
	at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:77)
	at org.eclipse.swt.widgets.Control.windowProc(Control.java:3562)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:4172)
	at org.eclipse.swt.internal.win32.OS.PeekMessageW(Native Method)
	at org.eclipse.swt.internal.win32.OS.PeekMessage(OS.java:2704)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3099)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2264)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2228)
	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2103)
	at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:457)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:452)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:101)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:146)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:354)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:169)
	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:476)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:416)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1124)
Comment 1 Darin Wright CLA 2007-02-12 11:57:36 EST 
It looks like this could happen if a console participant was deactivated before being activated. This could happen if activation fails for some reason. It would be nice to have a reproduceable test case.

I changed all calls to participants to be made in safe runnables. As well, any participant that causes an exception is now removed.
Comment 2 Darin Wright CLA 2007-02-12 11:57:55 EST 
Please verify, Mike.
Comment 3 Darin Wright CLA 2007-02-12 11:58:28 EST 
(Changes to ConsoleView and ConsolePlugin).
Comment 4 Michael Rennie CLA 2007-02-13 15:29:55 EST 
verified
Comment 5 Walter Harley CLA 2007-04-02 19:33:14 EDT 
Created attachment 62733 [details]
stack trace

Observed again today with N20070402-0010.  I wasn't doing anything special, just switching from target to host workspace in a PDE debug session.
Comment 6 Darin Wright CLA 2007-05-03 14:55:12 EDT 
*** Bug 185184 has been marked as a duplicate of this bug. ***
Comment 7 Darin Wright CLA 2007-05-03 14:55:36 EDT 
re-opening - has happenned since 3.3M6
Comment 8 Simon Archer CLA 2007-05-05 18:34:42 EDT 
I'm sorry, Darin, I believe that I was mistaken.  I saw this on 3.3M5, not 3.3M6.  My appologies.
Comment 9 Curtis Windatt CLA 2007-05-30 12:10:04 EDT 
I have this happening in my workspace.  It isn't clear what I did to get into this state, but I can now reproduce the NPE by opening a new Java Stack Trace console (already has an NPE stack trace I was looking at), then hitting the close console view action.  Two of the NPEs show up.

eclipse.buildId=I20070525-1350
java.version=1.6.0
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=en_US
Framework arguments:  -product org.eclipse.sdk.ide -pdelaunch
Command-line arguments:  -product org.eclipse.sdk.ide -data C:\Workspace Target -dev file:C:/Workspace/.metadata/.plugins/org.eclipse.pde.core/Eclipse Application/dev.properties -pdelaunch -os win32 -ws win32 -arch x86

Error
Wed May 30 10:59:08 CDT 2007
Error logged from Console plug-in: 

java.lang.NullPointerException
	at org.eclipse.ui.internal.handlers.HandlerService.deactivateHandler(HandlerService.java:143)
	at org.eclipse.jdt.internal.debug.ui.console.JavaStackTracePageParticipant.deactivated(JavaStackTracePageParticipant.java:94)
	at org.eclipse.jdt.internal.debug.ui.console.JavaStackTracePageParticipant.dispose(JavaStackTracePageParticipant.java:56)
	at org.eclipse.ui.internal.console.ConsoleView$2.run(ConsoleView.java:254)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
	at org.eclipse.ui.internal.console.ConsoleView.doDestroyPage(ConsoleView.java:252)
	at org.eclipse.ui.part.PageBookView.removePage(PageBookView.java:852)
	at org.eclipse.ui.part.PageBookView.partClosed(PageBookView.java:774)
	at org.eclipse.ui.internal.console.ConsoleView.partClosed(ConsoleView.java:119)
	at org.eclipse.ui.internal.console.ConsoleView$5.run(ConsoleView.java:406)
	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:123)
	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3659)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3296)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2389)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2353)
	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2219)
	at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:461)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:106)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:153)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176)
	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:504)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:443)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1169)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1144)
Comment 10 Darin Swanson CLA 2007-06-06 12:58:28 EDT 
Seeing this on:
eclipse.buildId=I20070531-1935
java.fullversion=J2RE 1.5.0 IBM J9 2.3 Windows XP x86-32 j9vmwi3223-20070201 (JIT enabled)
Comment 11 Darin Wright CLA 2007-06-18 11:46:30 EDT 
*** Bug 193125 has been marked as a duplicate of this bug. ***
Comment 12 Michael Rennie CLA 2007-11-13 10:30:16 EST 
heres one I got using N20071109-0010 (Linux GTK). Was happening after I pressed F11...


java.lang.NullPointerException
	at org.eclipse.debug.internal.ui.views.console.ProcessConsolePageParticipant.deactivated(ProcessConsolePageParticipant.java:255)
	at org.eclipse.debug.internal.ui.views.console.ProcessConsolePageParticipant.dispose(ProcessConsolePageParticipant.java:122)
	at org.eclipse.ui.internal.console.ConsoleView$2.run(ConsoleView.java:254)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
	at org.eclipse.ui.internal.console.ConsoleView.doDestroyPage(ConsoleView.java:252)
	at org.eclipse.ui.part.PageBookView.removePage(PageBookView.java:852)
	at org.eclipse.ui.part.PageBookView.partClosed(PageBookView.java:774)
	at org.eclipse.ui.internal.console.ConsoleView.partClosed(ConsoleView.java:119)
	at org.eclipse.ui.internal.console.ConsoleView$5.run(ConsoleView.java:406)
	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:130)
	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3312)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2985)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2395)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2359)
	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2225)
	at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:468)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:463)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:106)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:362)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:175)
	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:515)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:455)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1193)
Comment 13 Darin Wright CLA 2007-11-13 16:11:18 EST 
Marking as dup of older bug.

*** This bug has been marked as a duplicate of bug 146825 ***
Comment 14 Michael Rennie CLA 2008-02-29 14:26:04 EST 
*** Bug 220976 has been marked as a duplicate of this bug. ***