Swallowed Guava exception while trying to launch Eclipse with .eiq open

[bergmanngabor]

Seems Genmodel-related. Comes up several times. Not sure if we should worry about it, since it is completely swallowed.

Note: no .eiqgen in project.

Thread [main] (Suspended (exception java.util.NoSuchElementException))  
    owns: org.eclipse.xtext.xbase.resource.XbaseResource  (id=426)  
    owns: org.eclipse.swt.widgets.RunnableLock  (id=427)    
    owns: org.eclipse.swt.widgets.RunnableLock  (id=428)    
    com.google.common.collect.Iterators$7(com.google.common.collect.AbstractIterator<T>).next() line: 152   
    com.google.common.collect.Iterators.find(java.util.Iterator<T>, com.google.common.base.Predicate<? super T>) line: 715  
    com.google.common.collect.Iterables.find(java.lang.Iterable<T>, com.google.common.base.Predicate<? super T>) line: 638  
    org.eclipse.viatra2.emf.incquery.tooling.generator.genmodel.GenModelMetamodelProviderService.findGenPackage(org.eclipse.viatra2.emf.incquery.tooling.generator.generatorModel.IncQueryGeneratorModel, java.lang.String) line: 181   
    org.eclipse.viatra2.emf.incquery.tooling.generator.genmodel.GenModelMetamodelProviderService.findGenPackage(org.eclipse.emf.ecore.resource.ResourceSet, java.lang.String) line: 171 
    org.eclipse.viatra2.emf.incquery.tooling.generator.genmodel.GenModelMetamodelProviderService.loadEPackage(java.lang.String, org.eclipse.emf.ecore.resource.ResourceSet) line: 85    
    org.eclipse.viatra2.patternlanguage.scoping.EMFPatternLanguageLinkingService.getPackage(org.eclipse.viatra2.patternlanguage.eMFPatternLanguage.PackageImport, org.eclipse.xtext.nodemodel.ILeafNode) line: 102  
    org.eclipse.viatra2.patternlanguage.scoping.EMFPatternLanguageLinkingService.getLinkedObjects(org.eclipse.emf.ecore.EObject, org.eclipse.emf.ecore.EReference, org.eclipse.xtext.nodemodel.INode) line: 50  
    org.eclipse.xtext.xbase.resource.XbaseResource(org.eclipse.xtext.linking.lazy.LazyLinkingResource).getEObject(java.lang.String) line: 179   
    org.eclipse.xtext.xbase.resource.XbaseResource.access$0(org.eclipse.xtext.xbase.resource.XbaseResource, java.lang.String) line: 1   
    org.eclipse.xtext.xbase.resource.XbaseResource$2.exec(org.eclipse.xtext.xbase.resource.XbaseResource) line: 239 
    org.eclipse.xtext.xbase.resource.XbaseResource$2.exec(java.lang.Object) line: 1 
    org.eclipse.xtext.util.OnChangeEvictingCache.execWithoutCacheClear(Param, org.eclipse.xtext.util.concurrent.IUnitOfWork<Result,Param>) line: 124    
    org.eclipse.xtext.xbase.resource.XbaseResource.getEObject(java.lang.String) line: 237   
    org.eclipse.xtext.resource.SynchronizedXtextResourceSet(org.eclipse.emf.ecore.resource.impl.ResourceSetImpl).getEObject(org.eclipse.emf.common.util.URI, boolean) line: 219 
    org.eclipse.emf.ecore.util.EcoreUtil.resolve(org.eclipse.emf.ecore.EObject, org.eclipse.emf.ecore.resource.ResourceSet) line: 203   
    org.eclipse.emf.ecore.util.EcoreUtil.resolve(org.eclipse.emf.ecore.EObject, org.eclipse.emf.ecore.EObject) line: 263    
    org.eclipse.viatra2.patternlanguage.eMFPatternLanguage.impl.PackageImportImpl(org.eclipse.emf.ecore.impl.BasicEObjectImpl).eResolveProxy(org.eclipse.emf.ecore.InternalEObject) line: 1483  
    org.eclipse.viatra2.patternlanguage.eMFPatternLanguage.impl.PackageImportImpl.getEPackage() line: 74    
    org.eclipse.viatra2.patternlanguage.scoping.EMFPatternLanguageDeclarativeScopeProvider.createReferencedPackagesScope(org.eclipse.viatra2.patternlanguage.eMFPatternLanguage.PatternModel) line: 129 
    org.eclipse.viatra2.patternlanguage.scoping.EMFPatternLanguageDeclarativeScopeProvider.scope_EClassifier(org.eclipse.viatra2.patternlanguage.eMFPatternLanguage.ClassType, org.eclipse.emf.ecore.EReference) line: 107  
    sun.reflect.NativeMethodAccessorImpl.invoke0(java.lang.reflect.Method, java.lang.Object, java.lang.Object[]) line: not available [native method]    
    sun.reflect.NativeMethodAccessorImpl.invoke(java.lang.Object, java.lang.Object[]) line: 39  
    sun.reflect.DelegatingMethodAccessorImpl.invoke(java.lang.Object, java.lang.Object[]) line: 25  
    java.lang.reflect.Method.invoke(java.lang.Object, java.lang.Object...) line: 597    
    org.eclipse.viatra2.patternlanguage.core.scoping.MyAbstractDeclarativeScopeProvider$1(org.eclipse.xtext.util.PolymorphicDispatcher<RT>).invoke(java.lang.Object...) line: 291   
    org.eclipse.viatra2.patternlanguage.scoping.EMFPatternLanguageDeclarativeScopeProvider(org.eclipse.viatra2.patternlanguage.core.scoping.MyAbstractDeclarativeScopeProvider).polymorphicFindScopeForClassName(org.eclipse.emf.ecore.EObject, org.eclipse.emf.ecore.EReference) line: 104 
    org.eclipse.viatra2.patternlanguage.scoping.EMFPatternLanguageDeclarativeScopeProvider(org.eclipse.viatra2.patternlanguage.core.scoping.MyAbstractDeclarativeScopeProvider).getScope(org.eclipse.emf.ecore.EObject, org.eclipse.emf.ecore.EReference) line: 79  
    org.eclipse.viatra2.patternlanguage.scoping.EMFPatternLanguageScopeProvider(org.eclipse.xtext.xbase.scoping.XtypeScopeProvider).getScope(org.eclipse.emf.ecore.EObject, org.eclipse.emf.ecore.EReference) line: 33  
    org.eclipse.viatra2.patternlanguage.scoping.EMFPatternLanguageScopeProvider(org.eclipse.xtext.xbase.scoping.XbaseScopeProvider).getScope(org.eclipse.emf.ecore.EObject, org.eclipse.emf.ecore.EReference) line: 187 
    org.eclipse.xtext.xbase.linking.XbaseLinkingScopeProvider.getScope(org.eclipse.emf.ecore.EObject, org.eclipse.emf.ecore.EReference) line: 42    
    org.eclipse.viatra2.patternlanguage.scoping.EMFPatternLanguageLinkingService(org.eclipse.xtext.linking.impl.DefaultLinkingService).getScope(org.eclipse.emf.ecore.EObject, org.eclipse.emf.ecore.EReference) line: 59   
    org.eclipse.viatra2.patternlanguage.scoping.EMFPatternLanguageLinkingService(org.eclipse.xtext.linking.impl.DefaultLinkingService).getLinkedObjects(org.eclipse.emf.ecore.EObject, org.eclipse.emf.ecore.EReference, org.eclipse.xtext.nodemodel.INode) line: 119   
    org.eclipse.viatra2.patternlanguage.scoping.EMFPatternLanguageLinkingService.getLinkedObjects(org.eclipse.emf.ecore.EObject, org.eclipse.emf.ecore.EReference, org.eclipse.xtext.nodemodel.INode) line: 57  
    org.eclipse.xtext.xbase.resource.XbaseResource(org.eclipse.xtext.linking.lazy.LazyLinkingResource).getEObject(java.lang.String) line: 179   
    org.eclipse.xtext.xbase.resource.XbaseResource.access$0(org.eclipse.xtext.xbase.resource.XbaseResource, java.lang.String) line: 1   
    org.eclipse.xtext.xbase.resource.XbaseResource$2.exec(org.eclipse.xtext.xbase.resource.XbaseResource) line: 239 
    org.eclipse.xtext.xbase.resource.XbaseResource$2.exec(java.lang.Object) line: 1 
    org.eclipse.xtext.util.OnChangeEvictingCache.execWithoutCacheClear(Param, org.eclipse.xtext.util.concurrent.IUnitOfWork<Result,Param>) line: 124    
    org.eclipse.xtext.xbase.resource.XbaseResource.getEObject(java.lang.String) line: 237   
    org.eclipse.xtext.resource.SynchronizedXtextResourceSet(org.eclipse.emf.ecore.resource.impl.ResourceSetImpl).getEObject(org.eclipse.emf.common.util.URI, boolean) line: 219 
    org.eclipse.emf.ecore.util.EcoreUtil.resolve(org.eclipse.emf.ecore.EObject, org.eclipse.emf.ecore.resource.ResourceSet) line: 203   
    org.eclipse.emf.ecore.util.EcoreUtil.resolve(org.eclipse.emf.ecore.EObject, org.eclipse.emf.ecore.EObject) line: 263    
    org.eclipse.viatra2.patternlanguage.eMFPatternLanguage.impl.ClassTypeImpl(org.eclipse.emf.ecore.impl.BasicEObjectImpl).eResolveProxy(org.eclipse.emf.ecore.InternalEObject) line: 1483  
    org.eclipse.viatra2.patternlanguage.eMFPatternLanguage.impl.ClassTypeImpl.getClassname() line: 74   
    org.eclipse.viatra2.patternlanguage.eMFPatternLanguage.impl.ClassTypeImpl.eGet(int, boolean, boolean) line: 118 
    org.eclipse.viatra2.patternlanguage.eMFPatternLanguage.impl.ClassTypeImpl(org.eclipse.emf.ecore.impl.BasicEObjectImpl).eGet(org.eclipse.emf.ecore.EStructuralFeature, boolean, boolean) line: 1021  
    org.eclipse.viatra2.patternlanguage.eMFPatternLanguage.impl.ClassTypeImpl(org.eclipse.emf.ecore.impl.BasicEObjectImpl).eGet(org.eclipse.emf.ecore.EStructuralFeature, boolean) line: 1013   
    org.eclipse.emf.ecore.util.ECrossReferenceEList$ResolvingFeatureIteratorImpl<E>(org.eclipse.emf.ecore.util.EContentsEList$FeatureIteratorImpl<E>).hasNext() line: 409   
    org.eclipse.emf.ecore.util.EcoreUtil.resolveCrossReferences(org.eclipse.emf.ecore.EObject) line: 308    
    org.eclipse.emf.ecore.util.EcoreUtil.resolveAll(org.eclipse.emf.ecore.EObject) line: 302    
    org.eclipse.viatra2.patternlanguage.types.EMFPatternTypeProvider._typeForIdentifiable(org.eclipse.viatra2.patternlanguage.core.patternLanguage.Variable, boolean) line: 72  
    org.eclipse.viatra2.patternlanguage.types.EMFPatternTypeProvider.typeForIdentifiable(org.eclipse.xtext.common.types.JvmIdentifiableElement, boolean) line: 62   
    org.eclipse.xtext.xbase.typing.AbstractTypeProvider$4.doComputation(org.eclipse.xtext.common.types.JvmIdentifiableElement, boolean) line: 454   
    org.eclipse.xtext.xbase.typing.AbstractTypeProvider$4.doComputation(java.lang.Object, boolean) line: 1  
    org.eclipse.xtext.xbase.typing.AbstractTypeProvider$CyclicHandlingSupport$3.get() line: 658 
    org.eclipse.xtext.xbase.typing.AbstractTypeProvider$CyclicHandlingSupport$3.get() line: 1   
    org.eclipse.xtext.xbase.typing.AbstractTypeProvider$1.get(java.lang.Object, org.eclipse.emf.ecore.resource.Resource, com.google.inject.Provider<T>) line: 159   
    org.eclipse.xtext.xbase.typing.AbstractTypeProvider$4(org.eclipse.xtext.xbase.typing.AbstractTypeProvider$CyclicHandlingSupport<T>).getType(T, boolean) line: 655   
    org.eclipse.viatra2.patternlanguage.types.EMFPatternTypeProvider(org.eclipse.xtext.xbase.typing.AbstractTypeProvider).doGetType(java.lang.String, T, boolean, org.eclipse.xtext.xbase.typing.AbstractTypeProvider.CyclicHandlingSupport<T>) line: 348   
    org.eclipse.viatra2.patternlanguage.types.EMFPatternTypeProvider(org.eclipse.xtext.xbase.typing.AbstractTypeProvider).getTypeForIdentifiable(org.eclipse.xtext.common.types.JvmIdentifiableElement, boolean) line: 477  
    org.eclipse.viatra2.patternlanguage.types.EMFPatternTypeProvider(org.eclipse.xtext.xbase.typing.AbstractTypeProvider).getTypeForIdentifiable(org.eclipse.xtext.common.types.JvmIdentifiableElement) line: 473   
    org.eclipse.viatra2.emf.incquery.tooling.generator.util.EMFPatternLanguageJvmModelInferrerUtil.calculateType(org.eclipse.viatra2.patternlanguage.core.patternLanguage.Variable) line: 228   
    src/org/eclipse/viatra2/emf/incquery/tooling/generator/jvmmodel/PatternMatchClassInferrer.xtend line: 64    
    src/org/eclipse/viatra2/emf/incquery/tooling/generator/jvmmodel/PatternMatchClassInferrer.xtend line: 50    
    src/org/eclipse/viatra2/emf/incquery/tooling/generator/jvmmodel/EMFPatternLanguageJvmModelInferrer.xtend line: 68   
    src/org/eclipse/viatra2/emf/incquery/tooling/generator/jvmmodel/EMFPatternLanguageJvmModelInferrer.xtend line: 59   
    org.eclipse.viatra2.emf.incquery.tooling.generator.jvmmodel.EMFPatternLanguageJvmModelInferrer(org.eclipse.xtext.xbase.jvmmodel.AbstractModelInferrer)._infer(org.eclipse.emf.ecore.EObject, org.eclipse.xtext.xbase.jvmmodel.IJvmDeclaredTypeAcceptor, boolean) line: 69   
    src/org/eclipse/viatra2/emf/incquery/tooling/generator/jvmmodel/EMFPatternLanguageJvmModelInferrer.xtend line: not available    
    org.eclipse.xtext.xbase.jvmmodel.JvmModelAssociator.installDerivedState(org.eclipse.xtext.resource.DerivedStateAwareResource, boolean) line: 231    
    org.eclipse.xtext.xbase.resource.XbaseResource(org.eclipse.xtext.resource.DerivedStateAwareResource).installDerivedState(boolean) line: 125 
    org.eclipse.xtext.xbase.resource.XbaseResource(org.eclipse.xtext.resource.DerivedStateAwareResource).getContents() line: 48 
    org.eclipse.emf.ecore.resource.impl.ResourceImpl$4.getChildren(java.lang.Object) line: 525  
    org.eclipse.emf.ecore.resource.impl.ResourceImpl$4(org.eclipse.emf.common.util.AbstractTreeIterator<E>).hasAnyChildren() line: 103  
    org.eclipse.emf.ecore.resource.impl.ResourceImpl$4(org.eclipse.emf.common.util.AbstractTreeIterator<E>).hasNext() line: 91  
    org.eclipse.viatra2.patternlanguage.ui.highlight.EMFPatternLanguageHighlightingCalculator.searchAndHighlightElements(org.eclipse.xtext.resource.XtextResource, org.eclipse.xtext.ui.editor.syntaxcoloring.IHighlightedPositionAcceptor) line: 23    
    org.eclipse.viatra2.patternlanguage.ui.highlight.EMFPatternLanguageHighlightingCalculator(org.eclipse.xtext.xbase.ui.highlighting.XbaseHighlightingCalculator).doProvideHighlightingFor(org.eclipse.xtext.resource.XtextResource, org.eclipse.xtext.ui.editor.syntaxcoloring.IHighlightedPositionAcceptor) line: 115    
    org.eclipse.viatra2.patternlanguage.ui.highlight.EMFPatternLanguageHighlightingCalculator(org.eclipse.xtext.xbase.ui.highlighting.XbaseHighlightingCalculator).provideHighlightingFor(org.eclipse.xtext.resource.XtextResource, org.eclipse.xtext.ui.editor.syntaxcoloring.IHighlightedPositionAcceptor) line: 92   
    org.eclipse.xtext.ui.editor.syntaxcoloring.MergingHighlightedPositionAcceptor.provideHighlightingFor(org.eclipse.xtext.resource.XtextResource, org.eclipse.xtext.ui.editor.syntaxcoloring.IHighlightedPositionAcceptor) line: 51    
    org.eclipse.xtext.ui.editor.syntaxcoloring.HighlightingReconciler.reconcilePositions(org.eclipse.xtext.resource.XtextResource) line: 88 
    org.eclipse.xtext.ui.editor.syntaxcoloring.HighlightingReconciler.modelChanged(org.eclipse.xtext.resource.XtextResource) line: 281  
    org.eclipse.xtext.ui.editor.syntaxcoloring.HighlightingReconciler$1.process(org.eclipse.xtext.resource.XtextResource) line: 252 
    org.eclipse.xtext.ui.editor.syntaxcoloring.HighlightingReconciler$1.process(java.lang.Object) line: 1   
    org.eclipse.xtext.ui.editor.syntaxcoloring.HighlightingReconciler$1(org.eclipse.xtext.util.concurrent.IUnitOfWork$Void<T>).exec(T) line: 36 
    org.eclipse.xtext.ui.editor.model.XtextDocument$XtextDocumentLocker(org.eclipse.xtext.util.concurrent.AbstractReadWriteAcces<P>).readOnly(org.eclipse.xtext.util.concurrent.IUnitOfWork<T,P>) line: 32  
    org.eclipse.xtext.ui.editor.model.XtextDocument.readOnly(org.eclipse.xtext.util.concurrent.IUnitOfWork<T,org.eclipse.xtext.resource.XtextResource>) line: 78    
    org.eclipse.xtext.ui.editor.syntaxcoloring.HighlightingReconciler.refresh() line: 249   
    org.eclipse.xtext.ui.editor.syntaxcoloring.HighlightingReconciler.install(org.eclipse.xtext.ui.editor.XtextEditor, org.eclipse.xtext.ui.editor.XtextSourceViewer, org.eclipse.xtext.ui.editor.syntaxcoloring.HighlightingPresenter) line: 204   
    org.eclipse.xtext.ui.editor.syntaxcoloring.HighlightingHelper.enable() line: 91 
    org.eclipse.xtext.ui.editor.syntaxcoloring.HighlightingHelper.install(org.eclipse.xtext.ui.editor.XtextSourceViewerConfiguration, org.eclipse.xtext.ui.editor.XtextSourceViewer) line: 79   
    org.eclipse.xtext.ui.editor.syntaxcoloring.HighlightingHelper.install(org.eclipse.xtext.ui.editor.XtextEditor, org.eclipse.xtext.ui.editor.XtextSourceViewer) line: 61  
    org.eclipse.xtext.xbase.ui.editor.XbaseEditor(org.eclipse.xtext.ui.editor.XtextEditor).installHighlightingHelper() line: 496    
    org.eclipse.xtext.xbase.ui.editor.XbaseEditor(org.eclipse.xtext.ui.editor.XtextEditor).createPartControl(org.eclipse.swt.widgets.Composite) line: 458   
    org.eclipse.ui.internal.EditorReference.createPartHelper() line: 670    
    org.eclipse.ui.internal.EditorReference.createPart() line: 465  
    org.eclipse.ui.internal.EditorReference(org.eclipse.ui.internal.WorkbenchPartReference).getPart(boolean) line: 595  
    org.eclipse.ui.internal.EditorAreaHelper.setVisibleEditor(org.eclipse.ui.IEditorReference, boolean) line: 271   
    org.eclipse.ui.internal.EditorManager.setVisibleEditor(org.eclipse.ui.IEditorReference, boolean) line: 1459 
    org.eclipse.ui.internal.EditorManager$5.runWithException() line: 972    
    org.eclipse.ui.internal.EditorManager$5(org.eclipse.ui.internal.StartupThreading$StartupRunnable).run() line: 31    
    org.eclipse.swt.widgets.RunnableLock.run() line: 35 
    org.eclipse.ui.internal.UISynchronizer(org.eclipse.swt.widgets.Synchronizer).runAsyncMessages(boolean) line: 135    
    org.eclipse.swt.widgets.Display.runAsyncMessages(boolean) line: 4140    
    org.eclipse.swt.widgets.Display.readAndDispatch() line: 3757    
    org.eclipse.ui.internal.ide.application.IDEWorkbenchAdvisor(org.eclipse.ui.application.WorkbenchAdvisor).openWindows() line: 803    
    org.eclipse.ui.internal.Workbench$33.runWithException() line: 1600  
    org.eclipse.ui.internal.Workbench$33(org.eclipse.ui.internal.StartupThreading$StartupRunnable).run() line: 31   
    org.eclipse.swt.widgets.RunnableLock.run() line: 35 
    org.eclipse.ui.internal.UISynchronizer(org.eclipse.swt.widgets.Synchronizer).runAsyncMessages(boolean) line: 135    
    org.eclipse.swt.widgets.Display.runAsyncMessages(boolean) line: 4140    
    org.eclipse.swt.widgets.Display.readAndDispatch() line: 3757    
    org.eclipse.ui.internal.Workbench.runUI() line: 2609    
    org.eclipse.ui.internal.Workbench.access$4(org.eclipse.ui.internal.Workbench) line: 2499    
    org.eclipse.ui.internal.Workbench$7.run() line: 679 
    org.eclipse.core.databinding.observable.Realm.runWithDefault(org.eclipse.core.databinding.observable.Realm, java.lang.Runnable) line: 332   
    org.eclipse.ui.internal.Workbench.createAndRunWorkbench(org.eclipse.swt.widgets.Display, org.eclipse.ui.application.WorkbenchAdvisor) line: 668 
    org.eclipse.ui.PlatformUI.createAndRunWorkbench(org.eclipse.swt.widgets.Display, org.eclipse.ui.application.WorkbenchAdvisor) line: 149 
    org.eclipse.ui.internal.ide.application.IDEApplication.start(org.eclipse.equinox.app.IApplicationContext) line: 123 
    org.eclipse.equinox.internal.app.EclipseAppHandle.run(java.lang.Object) line: 196   
    org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(java.lang.Object) line: 110 
    org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(java.lang.Object) line: 79   
    org.eclipse.core.runtime.adaptor.EclipseStarter.run(java.lang.Object) line: 344 
    org.eclipse.core.runtime.adaptor.EclipseStarter.run(java.lang.String[], java.lang.Runnable) line: 179   
    sun.reflect.NativeMethodAccessorImpl.invoke0(java.lang.reflect.Method, java.lang.Object, java.lang.Object[]) line: not available [native method]    
    sun.reflect.NativeMethodAccessorImpl.invoke(java.lang.Object, java.lang.Object[]) line: 39  
    sun.reflect.DelegatingMethodAccessorImpl.invoke(java.lang.Object, java.lang.Object[]) line: 25  
    java.lang.reflect.Method.invoke(java.lang.Object, java.lang.Object...) line: 597    
    org.eclipse.equinox.launcher.Main.invokeFramework(java.lang.String[], java.net.URL[]) line: 622 
    org.eclipse.equinox.launcher.Main.basicRun(java.lang.String[]) line: 577    
    org.eclipse.equinox.launcher.Main.run(java.lang.String[]) line: 1410    
    org.eclipse.equinox.launcher.Main.main(java.lang.String[]) line: 1386   

[ujhelyiz]

This issue is genmodel-related. There are two specific reading into the issue:

• Firstly, the exception could be avoided if instead of searching for the first suitable genmodel using the find method the code would search all elements (into a lazy list), then the first element is reached. The used find API works like that. As it is mentioned in the catch block comment after, I am sure the solution is correct this way, albeit not the most straightforward one.
• Second, the API manages a genmodel even for projects that do not define one. This genmodel is empty, so the users of the genmodel do not have to worry about this. However, the API tries to find the corresponding EMF genmodel there, thus it throws the exception (because it is not found).

The main error in the design is that it throws this exception quite often what can become a performance hit. As some changes are still required in the API because of other tickets, I will look onto simple solutions that also fix this one, so I moved the issue in Milestone 0.6.0 Optional.

[bergmanngabor]

"The main error in the design is that it throws this exception quite often what can become a performance hit."

I only observed a handful of them, hardly a serious performance choke point. Then again, perhaps there may be conditions under which this exception is thrown a lot more frequently.

[ujhelyiz]

Fixed in master.