Home » Eclipse Projects » Eclipse 4 » NPE when switching Perspective(NPE in LazyStackRenderer.showElementRecursive)
| NPE when switching Perspective [message #1751421] |
Tue, 10 January 2017 08:04 |
 Ludwig Moser
Messages: 450
Registered: July 2009 |
Senior Member |
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Hello,
I'm facing a NPE when i try to switch perspective in my RCP Application.
The weird part is, this does not happen every time.
After this NPE gets thrown, the perspective (which you tried to switch to) does not open. all other perspectives can be opened.
using:
Version: 4.5.2.v20160212-1500
Build id: M20160212-1500
note: also happened with older Eclipse version.
seems to be related to CTabFolder
// If the parent changes we need to adjust the bounds of the child
// we do not call layout() because this could lead to
// a big amount of layout calls in unrelated places e.g. none
// visible children of a CTabFolder (see 460745)
if (refCtrl.getParent() != phComp) {
refCtrl.setParent(phComp);
refCtrl.setSize(phComp.getSize());
}
NPE StackTrace
!ENTRY org.eclipse.equinox.event 4 0 2017-01-10 08:40:35.979
!MESSAGE Exception while dispatching event org.osgi.service.event.Event [topic=org/eclipse/e4/ui/model/ui/ElementContainer/selectedElement/SET] {ChangedElement=org.eclipse.e4.ui.model.application.ui.advanced.impl.PerspectiveStackImpl@6d0b0da6 (elementId: org.eclipse.ui.ide.perspectivestack, tags: [], contributorURI: null) (widget: Composite {}, renderer: org.eclipse.e4.ui.workbench.renderers.swt.PerspectiveStackRenderer@4fa5cc73, toBeRendered: true, onTop: false, visible: true, containerData: 7500, accessibilityPhrase: null), Widget=Composite {}, AttName=selectedElement, NewValue=org.eclipse.e4.ui.model.application.ui.advanced.impl.PerspectiveImpl@33f2df51 (elementId: at.biooffice.views.contact.Perspective, tags: [persp.actionSet:org.eclipse.ui.cheatsheets.actionSet, persp.actionSet:org.eclipse.search.searchActionSet, persp.actionSet:org.eclipse.ui.edit.text.actionSet.annotationNavigation, persp.actionSet:org.eclipse.ui.edit.text.actionSet.navigation, persp.actionSet:org.eclipse.ui.edit.text.actionSet.convertLineDelimitersTo, persp.actionSet:org.eclipse.ui.externaltools.ExternalToolsSet, persp.actionSet:org.eclipse.ui.actionSet.keyBindings, persp.actionSet:org.eclipse.ui.actionSet.openFiles, persp.perspSC:at.biooffice.views.contact.Perspective], contributorURI: null) (widget: Composite {}, renderer: org.eclipse.e4.ui.workbench.renderers.swt.PerspectiveRenderer@6115846e, toBeRendered: true, onTop: false, visible: true, containerData: null, accessibilityPhrase: null) (label: Kontakt, iconURI: platform:/plugin/at.biooffice.views.contact/icons/16/user_gray.png, tooltip: null, context: PerspectiveImpl (at.biooffice.views.contact.Perspective) Context, variables: []), EventType=SET, OldValue=org.eclipse.e4.ui.model.application.ui.advanced.impl.PerspectiveImpl@3337d04c (elementId: at.biooffice.views.welcome.Perspective, tags: [persp.actionSet:org.eclipse.ui.cheatsheets.actionSet, persp.actionSet:org.eclipse.search.searchActionSet, persp.actionSet:org.eclipse.ui.edit.text.actionSet.annotationNavigation, persp.actionSet:org.eclipse.ui.edit.text.actionSet.navigation, persp.actionSet:org.eclipse.ui.edit.text.actionSet.convertLineDelimitersTo, persp.actionSet:org.eclipse.ui.externaltools.ExternalToolsSet, persp.actionSet:org.eclipse.ui.actionSet.keyBindings, persp.actionSet:org.eclipse.ui.actionSet.openFiles, persp.perspSC:at.biooffice.views.welcome.Perspective], contributorURI: null) (widget: Composite {}, renderer: org.eclipse.e4.ui.workbench.renderers.swt.PerspectiveRenderer@6115846e, toBeRendered: true, onTop: false, visible: true, containerData: null, accessibilityPhrase: null) (label: Anmelden, iconURI: platform:/plugin/at.biooffice.views.welcome/icons/server_edit.png, tooltip: null, context: PerspectiveImpl (at.biooffice.views.welcome.Perspective) Context, variables: [])} to handler org.eclipse.e4.ui.services.internal.events.UIEventHandler@1e429f56
!STACK 0
java.lang.NullPointerException
at org.eclipse.e4.ui.workbench.renderers.swt.LazyStackRenderer.showElementRecursive(LazyStackRenderer.java:238)
at org.eclipse.e4.ui.workbench.renderers.swt.LazyStackRenderer.showElementRecursive(LazyStackRenderer.java:284)
at org.eclipse.e4.ui.workbench.renderers.swt.LazyStackRenderer.showElementRecursive(LazyStackRenderer.java:290)
at org.eclipse.e4.ui.workbench.renderers.swt.LazyStackRenderer.showElementRecursive(LazyStackRenderer.java:290)
at org.eclipse.e4.ui.workbench.renderers.swt.LazyStackRenderer.showElementRecursive(LazyStackRenderer.java:290)
at org.eclipse.e4.ui.workbench.renderers.swt.LazyStackRenderer.showTab(LazyStackRenderer.java:162)
at org.eclipse.e4.ui.workbench.renderers.swt.PerspectiveStackRenderer.showTab(PerspectiveStackRenderer.java:88)
at org.eclipse.e4.ui.workbench.renderers.swt.LazyStackRenderer$1.handleEvent(LazyStackRenderer.java:72)
at org.eclipse.e4.ui.services.internal.events.UIEventHandler$1.run(UIEventHandler.java:40)
at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:186)
at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:145)
at org.eclipse.swt.widgets.Display.syncExec(Display.java:4761)
at org.eclipse.e4.ui.internal.workbench.swt.E4Application$1.syncExec(E4Application.java:211)
at org.eclipse.e4.ui.services.internal.events.UIEventHandler.handleEvent(UIEventHandler.java:36)
at org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:197)
at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:197)
at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:1)
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)
at org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:135)
at org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(EventAdminImpl.java:78)
at org.eclipse.equinox.internal.event.EventComponent.sendEvent(EventComponent.java:39)
at org.eclipse.e4.ui.services.internal.events.EventBroker.send(EventBroker.java:85)
at org.eclipse.e4.ui.internal.workbench.UIEventPublisher.notifyChanged(UIEventPublisher.java:59)
at org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:374)
at org.eclipse.e4.ui.model.application.ui.advanced.impl.PerspectiveStackImpl.setSelectedElement(PerspectiveStackImpl.java:135)
at org.eclipse.e4.ui.model.application.ui.advanced.impl.PerspectiveStackImpl.setSelectedElement(PerspectiveStackImpl.java:1)
at org.eclipse.e4.ui.workbench.addons.perspectiveswitcher.PerspectiveSwitcher$12.widgetSelected(PerspectiveSwitcher.java:590)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:248)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4362)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1113)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4180)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3769)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1127)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1018)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:694)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:606)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
at at.biooffice.application.Application.start(Application.java:65)
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:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:669)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:608)
at org.eclipse.equinox.launcher.Main.run(Main.java:1515)
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