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Java Model Exception: Core Exception [code 380] The resource tree is locked for modifications. at org.eclipse.jdt.core.JavaCore.setClasspathContainer (JavaCore.java:2743) at org.eclipse.jdt.internal.launching.JREContainerInitializer.initialize (JREContainerInitializer.java:54) at org.eclipse.jdt.core.JavaCore$1.run(JavaCore.java:857) at org.eclipse.core.internal.runtime.InternalPlatform.run (InternalPlatform.java:867) at org.eclipse.core.runtime.Platform.run(Platform.java:413) at org.eclipse.jdt.core.JavaCore.getClasspathContainer (JavaCore.java:852) at org.eclipse.jdt.internal.core.JavaProject.getResolvedClasspath (JavaProject.java:1428) at org.eclipse.jdt.internal.core.JavaProject.getResolvedClasspath (JavaProject.java:1344) at org.eclipse.jdt.internal.core.JavaProject.getResolvedClasspath (JavaProject.java:1320) at org.eclipse.jdt.internal.core.DeltaProcessor.addDependentProjects (DeltaProcessor.java:202) at org.eclipse.jdt.internal.core.DeltaProcessor.deleting (DeltaProcessor.java:723) at org.eclipse.jdt.internal.core.DeltaProcessor.resourceChanged (DeltaProcessor.java:1590) at org.eclipse.core.internal.events.NotificationManager$1.run (NotificationManager.java:137) at org.eclipse.core.internal.runtime.InternalPlatform.run (InternalPlatform.java:867) at org.eclipse.core.runtime.Platform.run(Platform.java:413) at org.eclipse.core.internal.events.NotificationManager.notify (NotificationManager.java:152) at org.eclipse.core.internal.events.NotificationManager.handleEvent (NotificationManager.java:124) at org.eclipse.core.internal.resources.Workspace.broadcastEvent (Workspace.java:163) at org.eclipse.core.internal.resources.Resource.delete (Resource.java:601) at org.eclipse.core.internal.resources.Project.delete(Project.java:292) at org.eclipse.pde.internal.ui.wizards.imports.PluginImportOperation.createProject (PluginImportOperation.java:151) at org.eclipse.pde.internal.ui.wizards.imports.PluginImportOperation.run (PluginImportOperation.java:119) at org.eclipse.core.internal.resources.Workspace.run (Workspace.java:1580) at org.eclipse.pde.internal.ui.wizards.imports.PluginImportWizard$2.run (PluginImportWizard.java:152) at org.eclipse.jface.operation.ModalContext$ModalContextThread.run (ModalContext.java:95)
Duplicate of bug 30393. FYI, the original bug is inside the platform preventing to run operations while the rsc tree is locked. We added another workaround for this scenario. *** This bug has been marked as a duplicate of 30393 ***