java.lang.RuntimeException: This exception has no message.

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java.lang.RuntimeException:
at org.eclipse.jface.viewers.ColumnViewer.checkBusy(ColumnViewer.java:763)
at org.eclipse.ui.navigator.CommonViewer.refresh(CommonViewer.java:353)
at org.eclipse.ui.internal.navigator.resources.workbench.ResourceExtensionContentProvider$3.run(ResourceExtensionContentProvider.java:294)
at org.eclipse.ui.internal.navigator.resources.workbench.ResourceExtensionContentProvider.runUpdates(ResourceExtensionContentProvider.java:306)
at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:285)
at org.eclipse.core.internal.events.NotificationManager.broadcastChanges(NotificationManager.java:149)
at org.eclipse.core.internal.resources.Workspace.broadcastPostChange(Workspace.java:327)
at org.eclipse.core.internal.resources.Workspace.endOperation(Workspace.java:1181)
at org.eclipse.core.internal.resources.Project.setDescription(Project.java:1226)
at org.eclipse.wst.common.project.facet.core.internal.FacetedProjectFrameworkImpl.create(FacetedProjectFrameworkImpl.java:721)
at org.maven.ide.eclipse.wtp.internal.WebResourcesContentProvider.getPipelinedChildren(WebResourcesContentProvider.java:66)
at org.eclipse.ui.internal.navigator.extensions.SafeDelegateTreeContentProvider.getPipelinedChildren(SafeDelegateTreeContentProvider.java:178)
at org.eclipse.ui.internal.navigator.NavigatorContentServiceContentProvider.pipelineChildren(NavigatorContentServiceContentProvider.java:204)
at org.eclipse.ui.internal.navigator.NavigatorContentServiceContentProvider.access$1(NavigatorContentServiceContentProvider.java:190)
at org.eclipse.ui.internal.navigator.NavigatorContentServiceContentProvider$1.run(NavigatorContentServiceContentProvider.java:159)
at org.eclipse.ui.internal.navigator.NavigatorContentServiceContentProvider.internalGetChildren(NavigatorContentServiceContentProvider.java:137)
at org.eclipse.jface.viewers.AbstractTreeViewer.getRawChildren(AbstractTreeViewer.java:1348)
at org.eclipse.jface.viewers.TreeViewer.getRawChildren(TreeViewer.java:391)
at org.eclipse.jface.viewers.StructuredViewer.getFilteredChildren(StructuredViewer.java:896)
at org.eclipse.jface.viewers.AbstractTreeViewer.getSortedChildren(AbstractTreeViewer.java:601)
at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:778)
at org.eclipse.jface.viewers.TreeViewer.createChildren(TreeViewer.java:644)
at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:749)
at org.eclipse.jface.viewers.AbstractTreeViewer.handleTreeExpand(AbstractTreeViewer.java:1444)
at org.eclipse.jface.viewers.TreeViewer.handleTreeExpand(TreeViewer.java:952)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:132)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1077)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1062)
at org.eclipse.swt.widgets.Tree.wmNotifyChild(Tree.java:7408)
at org.eclipse.swt.widgets.Control.wmNotify(Control.java:5096)
at org.eclipse.swt.widgets.Composite.wmNotify(Composite.java:1887)
at org.eclipse.swt.widgets.Control.WM_NOTIFY(Control.java:4726)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4215)
at org.eclipse.swt.internal.win32.OS.CallWindowProcW(Native Method)
at org.eclipse.swt.internal.win32.OS.CallWindowProc(OS.java:2362)
at org.eclipse.swt.widgets.Tree.callWindowProc(Tree.java:1536)
at org.eclipse.swt.widgets.Tree.WM_LBUTTONDOWN(Tree.java:6303)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4195)
at org.eclipse.swt.widgets.Tree.windowProc(Tree.java:5844)
at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2459)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2629)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2593)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2427)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:369)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:619)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)
at org.eclipse.equinox.launcher.Main.run(Main.java:1407)

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