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Bug 340179

Summary:

NullpointerException in DebugTargetProxy while debugging into a org.eclipse.emf.mwe WorflowComponent

Product:

[Modeling] EMFT

Reporter:

Missing name <frank_wuerffel>

Component:

MWE

Assignee:

Project Inbox <emft-mwe-inbox>

Status:

NEW ---

QA Contact:

Severity:

normal

Priority:

CC:

Michael_Rennie

Version:

unspecified

Target Milestone:

---

Hardware:

OS:

Windows XP

Whiteboard:

Attachments:

Description	Flags
debug config main	none
debug config common	none
debug config classpath	none
debug config args	none

Description Missing name

2011-03-16 11:57:51 EDT

Build Identifier: 20110301-1815

I have set a Breakpoint in an org.eclipse.emf.mwe.core.WorkflowComponent. 
When the Debugger hits the Breakpoint the Debug-Perspective is activated but then a NullpointerException occurs.

The Exception is not thrown when eclipse is started from the pde. In this case the debugging works as expected.

---- Error log details

eclipse.buildId=M20110210-1200
java.version=1.6.0_19
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=de_DE
Framework arguments:  -product org.eclipse.epp.package.jee.product
Command-line arguments:  -os win32 -ws win32 -arch x86 -product org.eclipse.epp.package.jee.product -clean


Error
Wed Mar 16 16:43:44 CET 2011
An internal error occurred during: "Model Proxy installed notification job".

java.lang.NullPointerException
at org.eclipse.debug.internal.ui.viewers.update.DebugTargetProxy.getNextSuspendedThreadDelta(DebugTargetProxy.java:118)
at org.eclipse.debug.internal.ui.viewers.update.DebugTargetProxy.installed(DebugTargetProxy.java:79)
at org.eclipse.debug.internal.ui.viewers.model.ModelContentProvider$13.run(ModelContentProvider.java:1226)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)



Reproducible: Always

Steps to Reproduce:
1. Plugin with a org.eclipse.emf.mwe.core.WorkflowComponent
2. Breakpoint set in the component implementation
3. debug as mwe workflow

Comment 1 Michael Rennie

2011-03-16 12:08:34 EDT

Just to confirm, are using the Java debugger or some other debugger (the 'mwe' debugger you mentioned in comment #0)? 

I am curious because from the stacktrace it looks like the backing debug target is returning an array of threads with a null entry.

Comment 2 Missing name

2011-03-17 05:42:01 EDT

(In reply to comment #1)
> Just to confirm, are using the Java debugger or some other debugger (the 'mwe'
> debugger you mentioned in comment #0)? 
> 
> I am curious because from the stacktrace it looks like the backing debug target
> is returning an array of threads with a null entry.

yes, I am using the java debugger. The class that I am trying to debug is an implementation of a WorkflowComponent interface which comes from the emf project.

I start the workflow by using the debug MWE Workflow Command provided by the emf project.

I am not sure if it is a generla debugger problem or a problem for the modeling project.

Comment 3 Michael Rennie

2011-03-17 10:10:20 EDT

(In reply to comment #2)
> 
> I start the workflow by using the debug MWE Workflow Command provided by the
> emf project.

What kind of launch configuration is used with the "debug MWE Workflow Command"? Can you attach a screen shot of the debug session that causes the exception?

> 
> I am not sure if it is a generla debugger problem or a problem for the modeling
> project.

The is sounding like a problem with EMF and their MWE debugger

Comment 4 Missing name

2011-03-17 12:22:18 EDT

Created attachment 191438 [details]
debug config main

Comment 5 Missing name

2011-03-17 12:22:53 EDT

Created attachment 191439 [details]
debug config common

Comment 6 Missing name

2011-03-17 12:23:14 EDT

Created attachment 191440 [details]
debug config classpath

Comment 7 Missing name

2011-03-17 12:23:43 EDT

Created attachment 191441 [details]
debug config args

Comment 8 Missing name

2011-03-17 12:24:12 EDT

(In reply to comment #3)
> (In reply to comment #2)
> > 
> > I start the workflow by using the debug MWE Workflow Command provided by the
> > emf project.
> 
> What kind of launch configuration is used with the "debug MWE Workflow
> Command"? Can you attach a screen shot of the debug session that causes the
> exception?
> 
> > 
> > I am not sure if it is a generla debugger problem or a problem for the modeling
> > project.
> 
> The is sounding like a problem with EMF and their MWE debugger

Attached screen shots of my debug config