[news.eclipse.modeling.gmf] Re: StackOverflow Problem

[Joel Greenyer <jgreen@xxxxxx>]

Hi Christian,
I've seen the thread you talk about and my feeling tells me you are right, as the loop I get involves the basic ecore stuff.
But what can I do to prevent that from happening, or at least identify where the problem lies?

Thanks for helping

Joel



Christian W. Damus wrote:
> Hi, Joel,
>
> The warning that you are seeing comes from the 
> TransactionalEditingDomain used by your GMF-based editor.  It indicates 
> that something in your diagram is causing a resource to be re-loaded 
> while it is in the process of unloading.  I suspect that this is 
> happening repeatedly (in an unbounded loop) in your case.
>
> The first report of this was in the GMF newsgroup quite some time ago 
> (early in the 2.1 release development, I think).  You can search there 
> for a thread about a diagram editor that, when closing, would unload its 
> resource but then some leaking edit-part listeners or something would 
> fire and cause proxies (just created by the unload) to resolve and load 
> the same resource again before it finished unloading.
>
> HTH,
>
> Christian
>
>
> Joel Greenyer wrote:
> > Hi,
> > I'm experiencing a StackOverflowError when I close my diagram editor. 
> > This happens with some models, but not with all, however, I don't see 
> > the pattern yet.
> >
> > java.lang.StackOverflowError
> >     at 
> > org.eclipse.emf.ecore.resource.impl.URIMappingRegistryImpl.getURI(URIMappingRegistryImpl.java:105) 
> >
> >     at 
> > org.eclipse.emf.ecore.resource.impl.URIMappingRegistryImpl$URIMapImpl.getURI(URIMappingRegistryImpl.java:168) 
> >
> >     at 
> > org.eclipse.emf.ecore.resource.impl.ExtensibleURIConverterImpl.normalize(ExtensibleURIConverterImpl.java:351) 
> >
> >     at 
> > org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.getResource(ResourceSetImpl.java:361) 
> >
> >     at 
> > org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.getEObject(ResourceSetImpl.java:216) 
> >
> >     at org.eclipse.emf.ecore.util.EcoreUtil.resolve(EcoreUtil.java:202)
> >     at org.eclipse.emf.ecore.util.EcoreUtil.resolve(EcoreUtil.java:262)
> >     at 
> > org.eclipse.emf.ecore.impl.BasicEObjectImpl.eResolveProxy(BasicEObjectImpl.java:1470) 
> >
> >     at 
> > org.eclipse.emf.ecore.util.EcoreEList.resolveProxy(EcoreEList.java:212)
> >     at org.eclipse.emf.ecore.util.EcoreEList.resolve(EcoreEList.java:167)
> >     at 
> > org.eclipse.emf.ecore.util.EObjectContainmentWithInverseEList$Resolving.resolve(EObjectContainmentWithInverseEList.java:111) 
> >
> >     at org.eclipse.emf.common.util.BasicEList.get(BasicEList.java:537)
> >     at 
> > org.eclipse.emf.ecore.util.EContentsEList$FeatureIteratorImpl.hasNext(EContentsEList.java:441) 
> >
> >     at 
> > org.eclipse.emf.ecore.util.EContentsEList$FeatureIteratorImpl.next(EContentsEList.java:561) 
> >
> >     at 
> > org.eclipse.emf.ecore.impl.EModelElementImpl.eObjectForURIFragmentSegment(EModelElementImpl.java:449) 
> >
> >     at 
> > org.eclipse.emf.ecore.resource.impl.ResourceImpl.getEObject(ResourceImpl.java:775) 
> >
> >     at 
> > org.eclipse.emf.ecore.resource.impl.ResourceImpl.getEObject(ResourceImpl.java:751) 
> >
> >     at 
> > org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.getEObject(ResourceSetImpl.java:219) 
> >
> >     at org.eclipse.emf.ecore.util.EcoreUtil.resolve(EcoreUtil.java:202)
> >     at org.eclipse.emf.ecore.util.EcoreUtil.resolve(EcoreUtil.java:262)
> >     at 
> > org.eclipse.emf.ecore.impl.BasicEObjectImpl.eResolveProxy(BasicEObjectImpl.java:1470) 
> >
> >     at 
> > org.eclipse.emf.ecore.util.EcoreEList.resolveProxy(EcoreEList.java:212)
> >     at org.eclipse.emf.ecore.util.EcoreEList.resolve(EcoreEList.java:167)
> >     at 
> > org.eclipse.emf.ecore.util.EObjectContainmentWithInverseEList$Resolving.resolve(EObjectContainmentWithInverseEList.java:111) 
> >
> >     at org.eclipse.emf.common.util.BasicEList.get(BasicEList.java:537)
> >     ...
> >
> >
> > When I don't get the StackOverflow, I see warnings as follows, could 
> > this be related?
> > "Resource was re-loaded while it was being unloaded, probably because 
> > of unintentional proxy resolution: platform:/resource/..."
> >
> > The diagram editor is an editor for "meta-rules", thus a lot of other 
> > packages are referenced from within the model, also ecore. Could that 
> > be part of the problem?
> >
> > Any ideas?
> >
> > Joel