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

["Christian W. Damus" <cdamus@xxxxxxxxxxxxx>]

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