Bug 313209

Description Jason Sholl 2010-05-17 14:08:31 EDT

An adopter product has observed the following NPE which blows up the stack.  In theory, a NPE such as this should never occur because a StructureEdit should never be null for a VirtualContainer.  However, considering the complexities of eclipse resource notification firings, and the fact that this can not be reliably reproduced, it would be better to guard against this NPE than letting it blow up the stack.

!ENTRY org.eclipse.core.resources 4 2 2010-02-22 13:50:32.289
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.core.resources".
!STACK 0
java.lang.NullPointerException
	at org.eclipse.wst.common.componentcore.internal.resources.VirtualContainer.findMember(VirtualContainer.java:80)
	at org.eclipse.wst.common.componentcore.internal.resources.VirtualContainer.findMember(VirtualContainer.java:71)
	at org.eclipse.wst.common.componentcore.internal.util.ComponentUtilities.findFile(ComponentUtilities.java:121)
	at org.eclipse.jst.j2ee.internal.project.J2EEProjectUtilities.getManifestFile(J2EEProjectUtilities.java:246)
	at org.eclipse.jst.j2ee.internal.common.J2EEDependencyListener.visit(J2EEDependencyListener.java:122)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:68)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:79)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:79)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:79)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:79)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:48)
	at org.eclipse.jst.j2ee.internal.common.J2EEDependencyListener.resourceChanged(J2EEDependencyListener.java:72)
	at org.eclipse.core.internal.events.NotificationManager$2.run(NotificationManager.java:288)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
	at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:272)
	at org.eclipse.core.internal.events.NotificationManager.broadcastChanges(NotificationManager.java:148)
	at org.eclipse.core.internal.resources.Workspace.broadcastPostChange(Workspace.java:313)
	at org.eclipse.core.internal.resources.Workspace.endOperation(Workspace.java:1022)
	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1809)
	at org.eclipse.core.internal.events.NotificationManager$NotifyJob.run(NotificationManager.java:39)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)