Comment 1 Tomasz Zarna 2008-06-02 05:20:09 EDT

From the code I can see that org.eclipse.ui.texteditor.IDocumentProvider.getDocument(Object) can return null as the requested document but org.eclipse.compare.structuremergeviewer.StructureCreator.setupDocument(IDocument) is not expecting it. This will cause the NPE.

snippet from org.eclipse.compare.structuremergeviewer.StructureCreator.internalCreateStructure(Object, IProgressMonitor):
IDocument document = provider.getDocument(input);
setupDocument(document);

Darin, do you get this NPE regularly, is it reproducible?

Comment 2 Darin Wright 2008-06-02 10:12:51 EDT

I do not have a reproduceable test case for this. After a re-start, the problem went away.

Comment 3 Tomasz Zarna 2008-08-12 09:59:41 EDT

*** Bug 243810 has been marked as a duplicate of this bug. ***

Comment 4 Brian Lima 2009-01-19 17:36:09 EST

I've seen this issue numerous times and it does effect the usefulness of the team synchronize perspective.  In my case I'm not using using a CVS repository but a CMVC server instead.  The plugins are different but the result is the same.  Every so often I can't view differences between local and report copies of a file if I use the synch perspective.  If I right click on a file and select to compare, that functions properly.

My stacktrace is below.  Is this something that could be fixed in the 3.4 maintenance stream?  

!ENTRY org.eclipse.ui 4 0 2008-11-20 16:11:18.890
!MESSAGE Unhandled event loop exception
!STACK 0
org.eclipse.swt.SWTException: Failed to execute runnable (java.lang.NullPointerException)
		 at org.eclipse.swt.SWT.error(Unknown Source)
		 at org.eclipse.swt.SWT.error(Unknown Source)
		 at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Unknown Source)
		 at org.eclipse.swt.widgets.Display.runAsyncMessages(Unknown Source)
		 at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
		 at org.eclipse.ui.internal.Workbench.runEventLoop(Unknown Source)
		 at org.eclipse.ui.internal.Workbench.runUI(Unknown Source)
		 at org.eclipse.ui.internal.Workbench.access$4(Unknown Source)
		 at org.eclipse.ui.internal.Workbench$5.run(Unknown Source)
		 at org.eclipse.core.databinding.observable.Realm.runWithDefault(Unknown Source)
		 at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Unknown Source)
		 at org.eclipse.ui.PlatformUI.createAndRunWorkbench(Unknown Source)
		 at org.eclipse.ui.internal.ide.application.IDEApplication.start(Unknown Source)
		 at org.eclipse.equinox.internal.app.EclipseAppHandle.run(Unknown Source)
		 at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(Unknown Source)
		 at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(Unknown Source)
		 at org.eclipse.core.runtime.adaptor.EclipseStarter.run(Unknown Source)
		 at org.eclipse.core.runtime.adaptor.EclipseStarter.run(Unknown Source)
		 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(Unknown Source)
		 at org.eclipse.equinox.launcher.Main.basicRun(Unknown Source)
		 at org.eclipse.equinox.launcher.Main.run(Unknown Source)
		 at org.eclipse.equinox.launcher.Main.main(Unknown Source)
Caused by: java.lang.NullPointerException
		 at org.eclipse.compare.structuremergeviewer.StructureCreator.setupDocument(Unknown Source)
		 at org.eclipse.compare.structuremergeviewer.StructureCreator.internalCreateStructure(Unknown Source)
		 at org.eclipse.compare.structuremergeviewer.StructureCreator.access$0(Unknown Source)
		 at org.eclipse.compare.structuremergeviewer.StructureCreator$1.run(Unknown Source)
		 at org.eclipse.swt.custom.BusyIndicator.showWhile(Unknown Source)
		 at org.eclipse.compare.internal.Utilities.runInUIThread(Unknown Source)
		 at org.eclipse.compare.structuremergeviewer.StructureCreator.createStructure(Unknown Source)
		 at org.eclipse.compare.structuremergeviewer.StructureDiffViewer$StructureInfo.createStructure(Unknown Source)
		 at org.eclipse.compare.structuremergeviewer.StructureDiffViewer$StructureInfo.refresh(Unknown Source)
		 at org.eclipse.compare.structuremergeviewer.StructureDiffViewer$StructureInfo.setInput(Unknown Source)
		 at org.eclipse.compare.structuremergeviewer.StructureDiffViewer.compareInputChanged(Unknown Source)
		 at org.eclipse.compare.structuremergeviewer.StructureDiffViewer$2.run(Unknown Source)
		 at org.eclipse.compare.structuremergeviewer.StructureDiffViewer$6.run(Unknown Source)
		 at org.eclipse.swt.custom.BusyIndicator.showWhile(Unknown Source)
		 at org.eclipse.compare.structuremergeviewer.StructureDiffViewer.compareInputChanged(Unknown Source)
		 at org.eclipse.compare.structuremergeviewer.StructureDiffViewer.compareInputChanged(Unknown Source)
		 at org.eclipse.compare.structuremergeviewer.StructureDiffViewer.inputChanged(Unknown Source)
		 at org.eclipse.jface.viewers.ContentViewer.setInput(Unknown Source)
		 at org.eclipse.jface.viewers.StructuredViewer.setInput(Unknown Source)
		 at org.eclipse.compare.CompareViewerSwitchingPane.setInput(Unknown Source)
		 at org.eclipse.compare.CompareEditorInput.feedInput(Unknown Source)
		 at org.eclipse.compare.CompareEditorInput.createContents(Unknown Source)
		 at org.eclipse.compare.internal.CompareEditor.createCompareControl(Unknown Source)
		 at org.eclipse.compare.internal.CompareEditor.access$6(Unknown Source)
		 at org.eclipse.compare.internal.CompareEditor$3.run(Unknown Source)
		 at org.eclipse.ui.internal.UILockListener.doPendingWork(Unknown Source)
		 at org.eclipse.ui.internal.UISynchronizer$3.run(Unknown Source)
		 at org.eclipse.swt.widgets.RunnableLock.run(Unknown Source)
		 ... 24 more

Comment 5 Brian Lima 2009-02-12 18:33:05 EST

Is anyone looking into this problem?  It definitely impacts the usability of the team plugins.

Comment 6 Szymon Brandys 2009-02-16 11:44:01 EST

(In reply to comment #5)
> Is anyone looking into this problem?  It definitely impacts the usability of
> the team plugins.

Hi Brian. As you noticed, Tomasz had tried to investigate the issue however we are on other issues right now.

Comment 7 Brian Lima 2009-02-17 15:56:53 EST

(In reply to comment #6)
> Hi Brian. As you noticed, Tomasz had tried to investigate the issue however we
> are on other issues right now.
> 
I can understand this not being a high priority item but Eclipse 3.4 / RAD v7.5.x is going to be in production for a long time to come.  A persistent problem with the team plugins will just hamper developers and force them to find less desirable alternatives.  If it's a matter of debugging, I can certainly try helping.

Comment 8 Barnaby Court 2009-03-18 09:23:00 EDT

Hi,  I am also using eclipse/cmvc I am unable to use the synchronization view about 95% of of the time due to this issue.  I'd be happy to help with debugging if there is anything I can do.  

Comment 9 Tomasz Zarna 2009-03-18 11:06:05 EDT

Thanks for your offer Barnaby and Brian. I guess a set of reproducible steps (for a CVS) would be most valuable here.

Comment 10 Tomasz Zarna 2009-03-31 10:51:05 EDT

Guys, any luck in finding reproducible steps? I don't recall seeing this exception, so any tips are welcome, even those for CMVC.

Comment 11 Barnaby Court 2009-03-31 10:55:36 EDT

I have not been able to duplicate this using CVS.  Unfortunately, even though I see it regularly with CVMC I haven't been able to see anything in the log files to be able to point to the root cause of the problem.  

(In reply to comment #10)
> Guys, any luck in finding reproducible steps? I don't recall seeing this
> exception, so any tips are welcome, even those for CMVC.
> 

Comment 12 Szymon Brandys 2009-03-31 12:01:08 EDT

(In reply to comment #11)
> I have not been able to duplicate this using CVS.  Unfortunately, even though I
> see it regularly with CVMC I haven't been able to see anything in the log files
> to be able to point to the root cause of the problem.  

What version of Eclipse do you use? Initially in the bug report it was I20080528-2000. Can you see the issue on the latest 3.5 integration/milestone version? Is there something specific about your workspace? Does it happen when you are comparing specific types of files. 

We are not able to reproduce the issue, so any additional details will be useful.

Comment 13 Barnaby Court 2009-03-31 13:40:32 EDT

I am seeing this issue on Eclipse Version: 3.4.1, Build id: M20080911-1700.  The problem appears to show up on files that are within a project that has at least one file with a conflict.  

Comment 14 Brian Lima 2009-03-31 17:57:17 EDT

I don't use Eclipse directly.  Instead I use RAD and have seen this error even in the latest RAD v7.5.2.  I don't use CVS so I can't say how to recreate using that SCM.  I've been seeing the problem specifically with the CMVC plugin and after talking to the developers of that plugin they pointed at this defect.

To reproduce I just open the synchronization view and double click on one of the entries.  I'll usually see errors in many different types of assets, from Java to XML but there are some cases that will successfully result in the compare editor to open.  I haven't noticed a specific pattern.

Comment 15 Avi 2009-04-02 02:56:07 EDT

The issue with CMVC does not appear when using Eclipse 3.4 directly. However, it definitely appears on both RSA Standard Edition 7.5 and 7.5.1. Also, compare editor (from the synch window) for a CMVC file that has remote changes only - works OK. But, comparing (from the synch window) a file that has conflicts or local changes only, does not work at all..

Comment 16 Szymon Brandys 2009-05-13 04:31:22 EDT

Thanks for all additional details. I was not able to reproduce on my dev version of Eclipse 3.5 though.

Removing 3.5 target milestone. Further investigation will be made in 3.6.

Comment 17 Szymon Brandys 2010-04-19 07:36:16 EDT

No plan to investigate it further at this point. Setting the target to match the reality.

Comment 18 Tomasz Zarna 2010-09-01 11:11:07 EDT

Without steps to reproduce having a target milestone in this particular case doesn't make much sense to me. Please let us know if the problem reappears and we will schedule it again.

Comment 19 Missing name 2010-10-11 09:16:05 EDT

I am not the reporter of this original bug but may have duplicated this same problem.  Let me know if I should open a separate bug.  This occurs everytime when bring up Eclipse, double click in the Breakpoints View and exit Eclipse.

Environment:

Eclipse Platform
Version: 3.5.0.v20090611a-9gEeG1HFtQcmRThO4O3aR_fqSMvJR2sJ
Build id: I20090611-1540  

JRE1.5.0_22.

I am unable to duplicate this bug in Elipse 3.6 with Java 1.6.

Regards,
Kathy Turetzky
kathy.turetzky@compuware.com


!ENTRY org.eclipse.osgi 4 0 2010-10-11 07:48:40.764
!MESSAGE Application error
!STACK 1
org.eclipse.swt.SWTException: Failed to execute runnable (java.lang.NullPointerException)
	at org.eclipse.swt.SWT.error(SWT.java:3884)
	at org.eclipse.swt.SWT.error(SWT.java:3799)
	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:137)
	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3885)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3506)
	at org.eclipse.swt.widgets.Display.release(Display.java:3557)
	at org.eclipse.swt.graphics.Device.dispose(Device.java:293)
	at com.compuware.frameworks.workbench.Application.start(Unknown Source)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:194)
	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:368)
	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:559)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1311)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1287)
Caused by: java.lang.NullPointerException
	at org.eclipse.debug.internal.ui.views.breakpoints.BreakpointsViewEventHandler$4.run(BreakpointsViewEventHandler.java:168)
	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:134)
	... 18 more

Comment 20 Remy Suen 2010-10-11 09:28:49 EDT

(In reply to comment #19)
> I am not the reporter of this original bug but may have duplicated this same
> problem.  Let me know if I should open a separate bug.  This occurs everytime
> when bring up Eclipse, double click in the Breakpoints View and exit Eclipse.

This bug is about a possible error in the code that occurs when you compare changes between files and is not related to breakpoints. You should open a new bug.

> I am unable to duplicate this bug in Elipse 3.6 with Java 1.6.

However, since you cannot replicate the problem in Eclipse 3.6, then there is probably no need to actually open a bug.

Comment 21 Eclipse Webmaster 2019-09-06 15:38:29 EDT

This bug hasn't had any activity in quite some time. Maybe the problem got resolved, was a duplicate of something else, or became less pressing for some reason - or maybe it's still relevant but just hasn't been looked at yet.

If you have further information on the current state of the bug, please add it. The information can be, for example, that the problem still occurs, that you still want the feature, that more information is needed, or that the bug is (for whatever reason) no longer relevant.