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java.lang.NullPointerException: 	at org.springframework.ide.eclipse.metadata.ui.RequestMappingView$ResourceChangeListener.resourceChanged(RequestMappingView.java:664)	at org.eclipse.core.internal.events.NotificationManager$1.run(NotificationManager.java:291)	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)	at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:285)	at org.eclipse.core.internal.events.NotificationManager.handleEvent(NotificationManager.java:261)	at org.eclipse.core.internal.resources.Workspace.broadcastEvent(Workspace.java:391)	at org.eclipse.core.internal.resources.Resource.broadcastPreDeleteEvent(Resource.java:2030)	at org.eclipse.core.internal.resources.Resource.delete(Resource.java:788)	at org.eclipse.core.internal.resources.Project.delete(Project.java:344)	at org.eclipse.ltk.core.refactoring.resource.DeleteResourceChange.perform(DeleteResourceChange.java:160)	at org.eclipse.ltk.core.refactoring.CompositeChange.perform(CompositeChange.java:278)	at org.eclipse.ltk.core.refactoring.CompositeChange.perform(CompositeChange.java:278)	at org.eclipse.ltk.core.refactoring.PerformChangeOperation$1.run(PerformChangeOperation.java:258)	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2345)	at org.eclipse.ltk.core.refactoring.PerformChangeOperation.executeChange(PerformChangeOperation.java:306)	at org.eclipse.ltk.internal.ui.refactoring.UIPerformChangeOperation.executeChange(UIPerformChangeOperation.java:92)	at org.eclipse.ltk.core.refactoring.PerformChangeOperation.run(PerformChangeOperation.java:218)	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2345)	at org.eclipse.ltk.internal.ui.refactoring.WorkbenchRunnableAdapter.run(WorkbenchRunnableAdapter.java:87)	at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)