[jbosstools-issues] [JBoss JIRA] (JBIDE-19430) JMX: Internal error during Refresh memory section

Martin Malina (JIRA) issues at jboss.org
Wed Mar 11 06:15:21 EDT 2015


Martin Malina created JBIDE-19430:
-------------------------------------

             Summary: JMX: Internal error during Refresh memory section
                 Key: JBIDE-19430
                 URL: https://issues.jboss.org/browse/JBIDE-19430
             Project: Tools (JBoss Tools)
          Issue Type: Bug
          Components: jmx
    Affects Versions: 4.2.3.Beta1
            Reporter: Martin Malina


When I have the Properties view show Memory usage of a running server process and then click on another process in the JMX Navigator view, I get errors thrown:
{code}
!ENTRY org.eclipse.core.jobs 4 2 2015-03-11 11:11:50.393
!MESSAGE An internal error occurred during: "Refresh memory section [PID: 5968]".
!STACK 0
java.lang.NullPointerException
	at org.jboss.tools.jmx.jvmmonitor.internal.ui.properties.memory.MemorySection$3.refreshModel(MemorySection.java:212)
	at org.jboss.tools.jmx.jvmmonitor.internal.ui.RefreshJob.run(RefreshJob.java:49)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

!ENTRY org.eclipse.ui.views.properties.tabbed 4 2 2015-03-11 11:11:50.407
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.ui.views.properties.tabbed".
!STACK 0
java.lang.NullPointerException
	at org.jboss.tools.jmx.jvmmonitor.internal.ui.properties.memory.MemorySection$1.getHeapListElements(MemorySection.java:99)
	at org.jboss.tools.jmx.jvmmonitor.internal.ui.properties.memory.HeapContentProvider.getElements(HeapContentProvider.java:38)
	at org.eclipse.jface.viewers.StructuredViewer.getRawChildren(StructuredViewer.java:999)
	at org.eclipse.jface.viewers.ColumnViewer.getRawChildren(ColumnViewer.java:699)
	at org.eclipse.jface.viewers.AbstractTreeViewer.getRawChildren(AbstractTreeViewer.java:1349)
	at org.eclipse.jface.viewers.TreeViewer.getRawChildren(TreeViewer.java:353)
	at org.eclipse.jface.viewers.StructuredViewer.getFilteredChildren(StructuredViewer.java:905)
	at org.eclipse.jface.viewers.AbstractTreeViewer.getSortedChildren(AbstractTreeViewer.java:617)
	at org.eclipse.jface.viewers.AbstractTreeViewer$1.run(AbstractTreeViewer.java:815)
	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
	at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:791)
	at org.eclipse.jface.viewers.TreeViewer.createChildren(TreeViewer.java:611)
	at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:762)
	at org.eclipse.jface.viewers.AbstractTreeViewer.internalInitializeTree(AbstractTreeViewer.java:1543)
	at org.eclipse.jface.viewers.TreeViewer.internalInitializeTree(TreeViewer.java:790)
	at org.eclipse.jface.viewers.AbstractTreeViewer$5.run(AbstractTreeViewer.java:1527)
	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1436)
	at org.eclipse.jface.viewers.TreeViewer.preservingSelection(TreeViewer.java:366)
	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1397)
	at org.eclipse.jface.viewers.AbstractTreeViewer.inputChanged(AbstractTreeViewer.java:1519)
	at org.eclipse.ui.dialogs.FilteredTree$NotifyingTreeViewer.inputChanged(FilteredTree.java:1261)
	at org.eclipse.jface.viewers.ContentViewer.setInput(ContentViewer.java:292)
	at org.eclipse.jface.viewers.StructuredViewer.setInput(StructuredViewer.java:1675)
	at org.jboss.tools.jmx.jvmmonitor.internal.ui.properties.memory.HeapHistogramPage.setInput(HeapHistogramPage.java:200)
	at org.jboss.tools.jmx.jvmmonitor.internal.ui.properties.memory.MemorySection.setInput(MemorySection.java:96)
	at org.jboss.tools.jmx.jvmmonitor.internal.ui.properties.AbstractJvmPropertySection.setInput(AbstractJvmPropertySection.java:190)
	at org.eclipse.ui.views.properties.tabbed.TabContents$5.run(TabContents.java:181)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:50)
	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:178)
	at org.eclipse.ui.views.properties.tabbed.TabContents.setInput(TabContents.java:184)
	at org.eclipse.ui.views.properties.tabbed.TabbedPropertySheetPage$SelectionChangedListener.selectionChanged(TabbedPropertySheetPage.java:212)
	at org.eclipse.jface.viewers.Viewer$2.run(Viewer.java:163)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:50)
	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:178)
	at org.eclipse.jface.viewers.Viewer.fireSelectionChanged(Viewer.java:160)
	at org.eclipse.jface.viewers.StructuredViewer.updateSelection(StructuredViewer.java:2171)
	at org.eclipse.jface.viewers.StructuredViewer.handleSelect(StructuredViewer.java:1202)
	at org.eclipse.jface.viewers.StructuredViewer$4.widgetSelected(StructuredViewer.java:1231)
	at org.eclipse.jface.util.OpenStrategy.fireSelectionEvent(OpenStrategy.java:242)
	at org.eclipse.jface.util.OpenStrategy.access$4(OpenStrategy.java:236)
	at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:408)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4199)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1467)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1490)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1475)
	at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1279)
	at org.eclipse.ui.internal.views.properties.tabbed.view.TabbedPropertyList.select(TabbedPropertyList.java:864)
	at org.eclipse.ui.internal.views.properties.tabbed.view.TabbedPropertyViewer.setSelectionToWidget(TabbedPropertyViewer.java:122)
	at org.eclipse.jface.viewers.StructuredViewer.setSelectionToWidget(StructuredViewer.java:1749)
	at org.eclipse.jface.viewers.StructuredViewer.setSelection(StructuredViewer.java:1705)
	at org.eclipse.jface.viewers.Viewer.setSelection(Viewer.java:388)
	at org.eclipse.ui.views.properties.tabbed.TabbedPropertySheetPage.setInput(TabbedPropertySheetPage.java:748)
	at org.eclipse.ui.views.properties.tabbed.TabbedPropertySheetPage.selectionChanged(TabbedPropertySheetPage.java:556)
	at org.eclipse.ui.views.properties.PropertySheet.selectionChanged(PropertySheet.java:365)
	at org.eclipse.ui.internal.e4.compatibility.SelectionService.notifyListeners(SelectionService.java:218)
	at org.eclipse.ui.internal.e4.compatibility.SelectionService.handlePostSelectionChanged(SelectionService.java:122)
	at org.eclipse.ui.internal.e4.compatibility.SelectionService.access$1(SelectionService.java:112)
	at org.eclipse.ui.internal.e4.compatibility.SelectionService$3.selectionChanged(SelectionService.java:80)
	at org.eclipse.e4.ui.internal.workbench.SelectionAggregator$4.run(SelectionAggregator.java:166)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.e4.ui.internal.workbench.SelectionAggregator.notifyPostListeners(SelectionAggregator.java:163)
	at org.eclipse.e4.ui.internal.workbench.SelectionAggregator.access$8(SelectionAggregator.java:160)
	at org.eclipse.e4.ui.internal.workbench.SelectionAggregator$8$1.run(SelectionAggregator.java:272)
	at org.eclipse.e4.core.contexts.RunAndTrack.runExternalCode(RunAndTrack.java:56)
	at org.eclipse.e4.ui.internal.workbench.SelectionAggregator$8.changed(SelectionAggregator.java:269)
	at org.eclipse.e4.core.internal.contexts.TrackableComputationExt.update(TrackableComputationExt.java:110)
	at org.eclipse.e4.core.internal.contexts.EclipseContext.processScheduled(EclipseContext.java:338)
	at org.eclipse.e4.core.internal.contexts.EclipseContext.set(EclipseContext.java:352)
	at org.eclipse.e4.ui.internal.workbench.SelectionServiceImpl.setPostSelection(SelectionServiceImpl.java:36)
	at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart$3.selectionChanged(CompatibilityPart.java:127)
	at org.eclipse.jface.viewers.StructuredViewer$3.run(StructuredViewer.java:876)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:50)
	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:178)
	at org.eclipse.jface.viewers.StructuredViewer.firePostSelectionChanged(StructuredViewer.java:873)
	at org.eclipse.jface.viewers.StructuredViewer.handlePostSelect(StructuredViewer.java:1217)
	at org.eclipse.ui.navigator.CommonViewer.handlePostSelect(CommonViewer.java:470)
	at org.eclipse.jface.viewers.StructuredViewer$5.widgetSelected(StructuredViewer.java:1243)
	at org.eclipse.jface.util.OpenStrategy.firePostSelectionEvent(OpenStrategy.java:265)
	at org.eclipse.jface.util.OpenStrategy.access$5(OpenStrategy.java:259)
	at org.eclipse.jface.util.OpenStrategy$1$2.run(OpenStrategy.java:440)
	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:136)
	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3994)
	at org.eclipse.swt.widgets.Display.observerProc(Display.java:3584)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
	at org.eclipse.swt.widgets.Display.applicationNextEventMatchingMask(Display.java:5000)
	at org.eclipse.swt.widgets.Display.applicationProc(Display.java:5378)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
	at org.eclipse.swt.widgets.Widget.callSuper(Widget.java:221)
	at org.eclipse.swt.widgets.Widget.mouseDownSuper(Widget.java:1101)
	at org.eclipse.swt.widgets.Tree.mouseDownSuper(Tree.java:2064)
	at org.eclipse.swt.widgets.Widget.mouseDown(Widget.java:1093)
	at org.eclipse.swt.widgets.Control.mouseDown(Control.java:2563)
	at org.eclipse.swt.widgets.Tree.mouseDown(Tree.java:2032)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:5638)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
	at org.eclipse.swt.widgets.Widget.callSuper(Widget.java:221)
	at org.eclipse.swt.widgets.Widget.windowSendEvent(Widget.java:2105)
	at org.eclipse.swt.widgets.Shell.windowSendEvent(Shell.java:2329)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:5702)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
	at org.eclipse.swt.widgets.Display.applicationSendEvent(Display.java:5139)
	at org.eclipse.swt.widgets.Display.applicationProc(Display.java:5288)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSend(Native Method)
	at org.eclipse.swt.internal.cocoa.NSApplication.sendEvent(NSApplication.java:128)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3666)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1151)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1032)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:148)
	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:636)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:579)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:135)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1465)

!ENTRY org.eclipse.core.jobs 4 2 2015-03-11 11:11:50.475
!MESSAGE An internal error occurred during: "Refresh memory section [PID: 5968]".
!STACK 0
java.lang.NullPointerException
	at org.jboss.tools.jmx.jvmmonitor.internal.ui.properties.memory.MemorySection$3.refreshModel(MemorySection.java:212)
	at org.jboss.tools.jmx.jvmmonitor.internal.ui.RefreshJob.run(RefreshJob.java:49)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

!ENTRY org.eclipse.ui.views.properties.tabbed 4 2 2015-03-11 11:11:50.477
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.ui.views.properties.tabbed".
!STACK 0
java.lang.NullPointerException
	at org.jboss.tools.jmx.jvmmonitor.internal.ui.properties.memory.MemorySection$1.getHeapListElements(MemorySection.java:99)
	at org.jboss.tools.jmx.jvmmonitor.internal.ui.properties.memory.HeapContentProvider.getElements(HeapContentProvider.java:38)
	at org.eclipse.jface.viewers.StructuredViewer.getRawChildren(StructuredViewer.java:999)
	at org.eclipse.jface.viewers.ColumnViewer.getRawChildren(ColumnViewer.java:699)
	at org.eclipse.jface.viewers.AbstractTreeViewer.getRawChildren(AbstractTreeViewer.java:1349)
	at org.eclipse.jface.viewers.TreeViewer.getRawChildren(TreeViewer.java:353)
	at org.eclipse.jface.viewers.StructuredViewer.getFilteredChildren(StructuredViewer.java:905)
	at org.eclipse.jface.viewers.AbstractTreeViewer.getSortedChildren(AbstractTreeViewer.java:617)
	at org.eclipse.jface.viewers.AbstractTreeViewer$1.run(AbstractTreeViewer.java:815)
	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
	at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:791)
	at org.eclipse.jface.viewers.TreeViewer.createChildren(TreeViewer.java:611)
	at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:762)
	at org.eclipse.jface.viewers.AbstractTreeViewer.internalInitializeTree(AbstractTreeViewer.java:1543)
	at org.eclipse.jface.viewers.TreeViewer.internalInitializeTree(TreeViewer.java:790)
	at org.eclipse.jface.viewers.AbstractTreeViewer$5.run(AbstractTreeViewer.java:1527)
	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1436)
	at org.eclipse.jface.viewers.TreeViewer.preservingSelection(TreeViewer.java:366)
	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1397)
	at org.eclipse.jface.viewers.AbstractTreeViewer.inputChanged(AbstractTreeViewer.java:1519)
	at org.eclipse.ui.dialogs.FilteredTree$NotifyingTreeViewer.inputChanged(FilteredTree.java:1261)
	at org.eclipse.jface.viewers.ContentViewer.setInput(ContentViewer.java:292)
	at org.eclipse.jface.viewers.StructuredViewer.setInput(StructuredViewer.java:1675)
	at org.jboss.tools.jmx.jvmmonitor.internal.ui.properties.memory.HeapHistogramPage.setInput(HeapHistogramPage.java:200)
	at org.jboss.tools.jmx.jvmmonitor.internal.ui.properties.memory.MemorySection.setInput(MemorySection.java:96)
	at org.jboss.tools.jmx.jvmmonitor.internal.ui.properties.AbstractJvmPropertySection.setInput(AbstractJvmPropertySection.java:190)
	at org.eclipse.ui.views.properties.tabbed.TabContents$5.run(TabContents.java:181)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:50)
	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:178)
	at org.eclipse.ui.views.properties.tabbed.TabContents.setInput(TabContents.java:184)
	at org.eclipse.ui.views.properties.tabbed.TabbedPropertySheetPage$SelectionChangedListener.selectionChanged(TabbedPropertySheetPage.java:212)
	at org.eclipse.jface.viewers.Viewer$2.run(Viewer.java:163)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:50)
	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:178)
	at org.eclipse.jface.viewers.Viewer.fireSelectionChanged(Viewer.java:160)
	at org.eclipse.jface.viewers.StructuredViewer.updateSelection(StructuredViewer.java:2171)
	at org.eclipse.jface.viewers.StructuredViewer.setSelection(StructuredViewer.java:1707)
	at org.eclipse.jface.viewers.Viewer.setSelection(Viewer.java:388)
	at org.eclipse.ui.views.properties.tabbed.TabbedPropertySheetPage.setInput(TabbedPropertySheetPage.java:748)
	at org.eclipse.ui.views.properties.tabbed.TabbedPropertySheetPage.selectionChanged(TabbedPropertySheetPage.java:556)
	at org.eclipse.ui.views.properties.PropertySheet.selectionChanged(PropertySheet.java:365)
	at org.eclipse.ui.internal.e4.compatibility.SelectionService.notifyListeners(SelectionService.java:218)
	at org.eclipse.ui.internal.e4.compatibility.SelectionService.handlePostSelectionChanged(SelectionService.java:122)
	at org.eclipse.ui.internal.e4.compatibility.SelectionService.access$1(SelectionService.java:112)
	at org.eclipse.ui.internal.e4.compatibility.SelectionService$3.selectionChanged(SelectionService.java:80)
	at org.eclipse.e4.ui.internal.workbench.SelectionAggregator$4.run(SelectionAggregator.java:166)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.e4.ui.internal.workbench.SelectionAggregator.notifyPostListeners(SelectionAggregator.java:163)
	at org.eclipse.e4.ui.internal.workbench.SelectionAggregator.access$8(SelectionAggregator.java:160)
	at org.eclipse.e4.ui.internal.workbench.SelectionAggregator$8$1.run(SelectionAggregator.java:272)
	at org.eclipse.e4.core.contexts.RunAndTrack.runExternalCode(RunAndTrack.java:56)
	at org.eclipse.e4.ui.internal.workbench.SelectionAggregator$8.changed(SelectionAggregator.java:269)
	at org.eclipse.e4.core.internal.contexts.TrackableComputationExt.update(TrackableComputationExt.java:110)
	at org.eclipse.e4.core.internal.contexts.EclipseContext.processScheduled(EclipseContext.java:338)
	at org.eclipse.e4.core.internal.contexts.EclipseContext.set(EclipseContext.java:352)
	at org.eclipse.e4.ui.internal.workbench.SelectionServiceImpl.setPostSelection(SelectionServiceImpl.java:36)
	at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart$3.selectionChanged(CompatibilityPart.java:127)
	at org.eclipse.jface.viewers.StructuredViewer$3.run(StructuredViewer.java:876)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:50)
	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:178)
	at org.eclipse.jface.viewers.StructuredViewer.firePostSelectionChanged(StructuredViewer.java:873)
	at org.eclipse.jface.viewers.StructuredViewer.handlePostSelect(StructuredViewer.java:1217)
	at org.eclipse.ui.navigator.CommonViewer.handlePostSelect(CommonViewer.java:470)
	at org.eclipse.jface.viewers.StructuredViewer$5.widgetSelected(StructuredViewer.java:1243)
	at org.eclipse.jface.util.OpenStrategy.firePostSelectionEvent(OpenStrategy.java:265)
	at org.eclipse.jface.util.OpenStrategy.access$5(OpenStrategy.java:259)
	at org.eclipse.jface.util.OpenStrategy$1$2.run(OpenStrategy.java:440)
	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:136)
	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3994)
	at org.eclipse.swt.widgets.Display.observerProc(Display.java:3584)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
	at org.eclipse.swt.widgets.Display.applicationNextEventMatchingMask(Display.java:5000)
	at org.eclipse.swt.widgets.Display.applicationProc(Display.java:5378)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
	at org.eclipse.swt.widgets.Widget.callSuper(Widget.java:221)
	at org.eclipse.swt.widgets.Widget.mouseDownSuper(Widget.java:1101)
	at org.eclipse.swt.widgets.Tree.mouseDownSuper(Tree.java:2064)
	at org.eclipse.swt.widgets.Widget.mouseDown(Widget.java:1093)
	at org.eclipse.swt.widgets.Control.mouseDown(Control.java:2563)
	at org.eclipse.swt.widgets.Tree.mouseDown(Tree.java:2032)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:5638)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
	at org.eclipse.swt.widgets.Widget.callSuper(Widget.java:221)
	at org.eclipse.swt.widgets.Widget.windowSendEvent(Widget.java:2105)
	at org.eclipse.swt.widgets.Shell.windowSendEvent(Shell.java:2329)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:5702)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
	at org.eclipse.swt.widgets.Display.applicationSendEvent(Display.java:5139)
	at org.eclipse.swt.widgets.Display.applicationProc(Display.java:5288)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSend(Native Method)
	at org.eclipse.swt.internal.cocoa.NSApplication.sendEvent(NSApplication.java:128)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3666)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1151)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1032)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:148)
	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:636)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:579)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:135)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1465)
{code}

See steps to reproduce.



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