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Created attachment 270818 [details] Use case to reproduce When deleting a project with tree representation opened 2 exceptions are raised Steps to reproduce: - Import the project joined - Open tree representation - Delete project TreeBug - 2 exceptions are raised. KO First Exception: An internal error occurred during: "Refresh". java.lang.NullPointerException at org.eclipse.sirius.ui.tools.internal.editor.AbstractDTreeEditor$1.run(AbstractDTreeEditor.java:897) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:56) Can't handle resource change : platform:/resource/TreeBug/My.ecore java.util.ConcurrentModificationException at org.eclipse.emf.common.util.AbstractEList$EIterator.checkModCount(AbstractEList.java:760) at org.eclipse.emf.common.util.AbstractEList$EIterator.doNext(AbstractEList.java:708) at org.eclipse.emf.common.util.AbstractEList$EIterator.next(AbstractEList.java:694) at fr.obeo.dsl.viewpoint.collab.internal.remotesession.CollaborativeDAnalysisSessionImpl.disableAndRemoveECrossReferenceAdapters(CollaborativeDAnalysisSessionImpl.java:702) at org.eclipse.sirius.business.internal.session.danalysis.DAnalysisSessionImpl.close(DAnalysisSessionImpl.java:1271) at fr.obeo.dsl.viewpoint.collab.internal.remotesession.CollaborativeDAnalysisSessionImpl.close(CollaborativeDAnalysisSessionImpl.java:288) at org.eclipse.sirius.business.internal.session.danalysis.SessionResourcesSynchronizer.processAction(SessionResourcesSynchronizer.java:166) at org.eclipse.sirius.business.internal.session.danalysis.SessionResourcesSynchronizer.statusesChanged(SessionResourcesSynchronizer.java:106) at org.eclipse.sirius.common.tools.api.resource.ResourceSetSync.notifyClientsInBatch(ResourceSetSync.java:392) at org.eclipse.sirius.common.tools.api.resource.ResourceSetSync.statusesChanged(ResourceSetSync.java:447) at org.eclipse.sirius.common.tools.internal.resource.ResourceSyncClientNotifier.run(ResourceSyncClientNotifier.java:77) at org.eclipse.sirius.common.tools.internal.resource.EditingSessionWorkspaceListener.resourceChanged(EditingSessionWorkspaceListener.java:59) at org.eclipse.core.internal.events.NotificationManager$1.run(NotificationManager.java:299) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:289) at org.eclipse.core.internal.events.NotificationManager.broadcastChanges(NotificationManager.java:152) at org.eclipse.core.internal.resources.Workspace.broadcastPostChange(Workspace.java:374) at org.eclipse.core.internal.resources.Workspace.checkpoint(Workspace.java:529) at org.eclipse.ltk.core.refactoring.PerformChangeOperation$1.run(PerformChangeOperation.java:262) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2240) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2267) at org.eclipse.ltk.core.refactoring.PerformChangeOperation.executeChange(PerformChangeOperation.java:305) at org.eclipse.ltk.internal.ui.refactoring.UIPerformChangeOperation.executeChange(UIPerformChangeOperation.java:96) at org.eclipse.ltk.core.refactoring.PerformChangeOperation.run(PerformChangeOperation.java:216) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2240) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2267) at org.eclipse.ltk.internal.ui.refactoring.WorkbenchRunnableAdapter.run(WorkbenchRunnableAdapter.java:86) at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:119)
Works for me
I can reproduce, with the following pure-Sirius stack trace (this is using Sirius 5.1.0rc2), but this is actually the same issue as bug #494130: java.util.ConcurrentModificationException at org.eclipse.emf.common.util.AbstractEList$EIterator.checkModCount(AbstractEList.java:760) at org.eclipse.emf.common.util.AbstractEList$EIterator.doNext(AbstractEList.java:708) at org.eclipse.emf.common.util.AbstractEList$EIterator.next(AbstractEList.java:694) at org.eclipse.sirius.business.internal.session.danalysis.DAnalysisSessionImpl.disableAndRemoveECrossReferenceAdapters(DAnalysisSessionImpl.java:313) at org.eclipse.sirius.business.internal.session.danalysis.DAnalysisSessionImpl.close(DAnalysisSessionImpl.java:1271) at org.eclipse.sirius.business.internal.session.danalysis.SessionResourcesSynchronizer.processAction(SessionResourcesSynchronizer.java:166) at org.eclipse.sirius.business.internal.session.danalysis.SessionResourcesSynchronizer.statusesChanged(SessionResourcesSynchronizer.java:106) at org.eclipse.sirius.common.tools.api.resource.ResourceSetSync.notifyClientsInBatch(ResourceSetSync.java:392) at org.eclipse.sirius.common.tools.api.resource.ResourceSetSync.statusesChanged(ResourceSetSync.java:447) at org.eclipse.sirius.common.tools.internal.resource.ResourceSyncClientNotifier.run(ResourceSyncClientNotifier.java:77) at org.eclipse.sirius.common.tools.internal.resource.EditingSessionWorkspaceListener.resourceChanged(EditingSessionWorkspaceListener.java:59) at org.eclipse.core.internal.events.NotificationManager$1.run(NotificationManager.java:299) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:289) at org.eclipse.core.internal.events.NotificationManager.broadcastChanges(NotificationManager.java:152) at org.eclipse.core.internal.resources.Workspace.broadcastPostChange(Workspace.java:374) at org.eclipse.core.internal.resources.Workspace.checkpoint(Workspace.java:529) at org.eclipse.ltk.core.refactoring.PerformChangeOperation$1.run(PerformChangeOperation.java:262) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2240) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2267) at org.eclipse.ltk.core.refactoring.PerformChangeOperation.executeChange(PerformChangeOperation.java:305) at org.eclipse.ltk.internal.ui.refactoring.UIPerformChangeOperation.executeChange(UIPerformChangeOperation.java:96) at org.eclipse.ltk.core.refactoring.PerformChangeOperation.run(PerformChangeOperation.java:216) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2240) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2267) at org.eclipse.ltk.internal.ui.refactoring.WorkbenchRunnableAdapter.run(WorkbenchRunnableAdapter.java:86) at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:119) *** This bug has been marked as a duplicate of bug 494130 ***
