bug #8916: ConcurrentModificationException in CdmFormFactory.destroyElement() - EDIT - EDIT Project Management

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bug #8916

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ConcurrentModificationException in CdmFormFactory.destroyElement()

Added by Katja Luther about 4 years ago. Updated about 2 years ago.

Status:

In Progress

Priority:

Highest

Assignee:

Katja Luther

Category:

taxeditor

Target version:

Release 5.45

Start date:

Due date:

% Done:

50%

Estimated time:

Severity:

blocker

Found in Version:

Description

While updating the views sometimes a ConcurrentModificationException appears while AbstractCdmDataViewerE4.destroySections calls CdmFormFactory.destroyElement().

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Updated by Katja Luther about 4 years ago

mail WB:

Hallo,
entfernen der Doubtful-Flag im Details View, Save -> Fehler
HG
W

last remote method : http://api.cybertaxonomy.org:80/caryophyllales_spp/remoting/taxonnode.service
last remote request client time : 2020-03-29T08:13:56.525
last remote request response header time : Sun, 29 Mar 2020 08:13:56 GMT
client error time : 2020-03-29T08:13:56.931
login : w.berendsohn
editor version : 5.13.1
server : api.cybertaxonomy.org (cybertaxonomy.org) / caryophyllales_spp
schema version : 5.12.0.0.20191202
os : Windows Server 2012 R2 6.3 amd64
java : 1.8.0_121
org.eclipse.swt.SWTException: Failed to execute runnable (java.util.ConcurrentModificationException)
                at org.eclipse.swt.SWT.error(SWT.java:4533)
                at org.eclipse.swt.SWT.error(SWT.java:4448)
                at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:185)
                at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4211)
                at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3827)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1121)
                at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1022)
                at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:150)
                at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:693)
                at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
                at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:610)
                at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)
                at eu.etaxonomy.taxeditor.Application.start(Application.java:24)
                at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
                at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
                at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
                at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)
                at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)
                at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
                at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
                at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
                at java.lang.reflect.Method.invoke(Method.java:498)
                at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:673)
                at org.eclipse.equinox.launcher.Main.basicRun(Main.java:610)
                at org.eclipse.equinox.launcher.Main.run(Main.java:1519)
Caused by: java.util.ConcurrentModificationException
                at java.util.HashMap$HashIterator.nextNode(HashMap.java:1437)
                at java.util.HashMap$KeyIterator.next(HashMap.java:1461)
                at eu.etaxonomy.taxeditor.ui.element.CdmFormFactory.destroyElement(CdmFormFactory.java:565)
                at eu.etaxonomy.taxeditor.ui.element.CdmFormFactory.destroyElement(CdmFormFactory.java:566)
                at eu.etaxonomy.taxeditor.ui.element.CdmFormFactory.destroyElement(CdmFormFactory.java:566)
                at eu.etaxonomy.taxeditor.view.e4.AbstractCdmDataViewerE4.destroySections(AbstractCdmDataViewerE4.java:183)
                at eu.etaxonomy.taxeditor.view.e4.details.DetailsPartE4.showEmptyPage(DetailsPartE4.java:131)
                at eu.etaxonomy.taxeditor.view.e4.details.DetailsPartE4.selectionChanged_internal(DetailsPartE4.java:117)
                at eu.etaxonomy.taxeditor.view.e4.AbstractCdmEditorPartE4$DelaySelection.run(AbstractCdmEditorPartE4.java:94)
                at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
                at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:182)
                ... 23 more

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Updated by Katja Luther about 4 years ago

mail WB:

Hallo,
nach Save nach Ändern der sec.-Ref. im Details-View.
HG
W

last remote method : http://api.cybertaxonomy.org:80/caryophyllales_spp/remoting/taxonnode.service
last remote request client time : 2020-03-29T17:53:09.635
last remote request response header time : Sun, 29 Mar 2020 17:53:09 GMT
client error time : 2020-03-29T17:53:10.369
login : w.berendsohn
editor version : 5.13.1
server : api.cybertaxonomy.org (cybertaxonomy.org) / caryophyllales_spp
schema version : 5.12.0.0.20191202
os : Windows Server 2012 R2 6.3 amd64
java : 1.8.0_121
org.eclipse.swt.SWTException: Failed to execute runnable (java.util.ConcurrentModificationException)
                at org.eclipse.swt.SWT.error(SWT.java:4533)
                at org.eclipse.swt.SWT.error(SWT.java:4448)
                at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:185)
                at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4211)
                at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3827)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1121)
                at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1022)
                at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:150)
                at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:693)
                at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
                at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:610)
                at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)
                at eu.etaxonomy.taxeditor.Application.start(Application.java:24)
                at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
                at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
                at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
                at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)
                at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)
                at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
                at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
                at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
                at java.lang.reflect.Method.invoke(Method.java:498)
                at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:673)
                at org.eclipse.equinox.launcher.Main.basicRun(Main.java:610)
                at org.eclipse.equinox.launcher.Main.run(Main.java:1519)
Caused by: java.util.ConcurrentModificationException
                at java.util.HashMap$HashIterator.nextNode(HashMap.java:1437)
                at java.util.HashMap$KeyIterator.next(HashMap.java:1461)
                at eu.etaxonomy.taxeditor.ui.element.CdmFormFactory.destroyElement(CdmFormFactory.java:565)
                at eu.etaxonomy.taxeditor.ui.element.CdmFormFactory.destroyElement(CdmFormFactory.java:566)
                at eu.etaxonomy.taxeditor.ui.element.CdmFormFactory.destroyElement(CdmFormFactory.java:566)
                at eu.etaxonomy.taxeditor.view.e4.AbstractCdmDataViewerE4.destroySections(AbstractCdmDataViewerE4.java:183)
                at eu.etaxonomy.taxeditor.view.e4.details.DetailsPartE4.showEmptyPage(DetailsPartE4.java:131)
                at eu.etaxonomy.taxeditor.view.e4.details.DetailsPartE4.selectionChanged_internal(DetailsPartE4.java:117)
                at eu.etaxonomy.taxeditor.view.e4.AbstractCdmEditorPartE4$DelaySelection.run(AbstractCdmEditorPartE4.java:94)
                at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
                at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:182)
                ... 23 more

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Updated by Katja Luther about 4 years ago

Status changed from New to Resolved
% Done changed from 0 to 50

Applied in changeset taxeditor|002ea91bea2170b2f7307f8c7bf791e7c6ab28e0.

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Updated by Katja Luther about 4 years ago

Assignee changed from Katja Luther to Andreas Müller
Target version changed from Unassigned CDM tickets to Release 5.14
Severity changed from normal to blocker

Avoid the ConcurrentModificationException by using an iterator for iterating over the elements of a set to destroy the cdmFormElements.

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Updated by Andreas Müller about 4 years ago

Assignee changed from Andreas Müller to Katja Luther

The above fix can not work because the remove is not called on the iterator. I changed the code in a way that a temporary set is used so ConcurrentModification can not happen on the elements set.
I hope this fixes this issue.

Please review.

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Updated by Katja Luther about 4 years ago

Status changed from Resolved to Closed

I could not reproduce the exception anymore and the solution seems to be correct.

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Updated by Katja Luther about 4 years ago

Assignee changed from Katja Luther to Andreas Müller

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Updated by Katja Luther about 2 years ago

Maybe this is the same problem again?

The stacktrace is a little bit different but seems to be the same:

mail WB:

Hallo,
ich habe Caryophyllales_spp aufgemacht, einen Basionym-Autor nachgetragen und zugemacht. Dann kam folgender Fehler.
Habe noch mal nachgesehen: Der Basionym Autor ist eingetragen.
HG
W

last remote method : http://api.cybertaxonomy.org:80/caryophyllales_spp/remoting/common.service
last remote request client time : 2022-03-14T07:36:37.81
last remote request response header time : Mon, 14 Mar 2022 06:34:45 GMT
client error time : 2022-03-14T07:36:50.275
login : w.berendsohn
editor version : 5.30.0
server : api.cybertaxonomy.org (cybertaxonomy.org) / caryophyllales_spp
schema version : 5.29.0.0.20211122
os : Windows 10 10.0 amd64
java : 1.8.0_321
org.eclipse.e4.core.di.InjectionException: org.eclipse.e4.core.di.InjectionException: org.eclipse.e4.core.di.InjectionException: org.eclipse.e4.core.di.InjectionException: org.eclipse.e4.core.di.InjectionException: java.util.ConcurrentModificationException
                at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:65)
                at org.eclipse.e4.core.internal.contexts.ContextObjectSupplier$ContextInjectionListener.update(ContextObjectSupplier.java:90)
                at org.eclipse.e4.core.internal.contexts.TrackableComputationExt.update(TrackableComputationExt.java:111)
                at org.eclipse.e4.core.internal.contexts.EclipseContext.processScheduled(EclipseContext.java:344)
                at org.eclipse.e4.core.internal.contexts.EclipseContext.dispose(EclipseContext.java:178)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.clearContext(PartRenderingEngine.java:966)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeRemoveGui(PartRenderingEngine.java:939)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$1(PartRenderingEngine.java:846)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$3.run(PartRenderingEngine.java:841)
                at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.removeGui(PartRenderingEngine.java:825)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeRemoveGui(PartRenderingEngine.java:880)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$1(PartRenderingEngine.java:846)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$3.run(PartRenderingEngine.java:841)
                at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.removeGui(PartRenderingEngine.java:825)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeRemoveGui(PartRenderingEngine.java:880)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$1(PartRenderingEngine.java:846)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$3.run(PartRenderingEngine.java:841)
                at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.removeGui(PartRenderingEngine.java:825)
                at org.eclipse.e4.ui.workbench.renderers.swt.ElementReferenceRenderer.disposeWidget(ElementReferenceRenderer.java:112)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeRemoveGui(PartRenderingEngine.java:918)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$1(PartRenderingEngine.java:846)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$3.run(PartRenderingEngine.java:841)
                at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.removeGui(PartRenderingEngine.java:825)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeRemoveGui(PartRenderingEngine.java:880)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$1(PartRenderingEngine.java:846)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$3.run(PartRenderingEngine.java:841)
                at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.removeGui(PartRenderingEngine.java:825)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeRemoveGui(PartRenderingEngine.java:873)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$1(PartRenderingEngine.java:846)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$3.run(PartRenderingEngine.java:841)
                at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.removeGui(PartRenderingEngine.java:825)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeRemoveGui(PartRenderingEngine.java:880)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$1(PartRenderingEngine.java:846)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$3.run(PartRenderingEngine.java:841)
                at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.removeGui(PartRenderingEngine.java:825)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeRemoveGui(PartRenderingEngine.java:880)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$1(PartRenderingEngine.java:846)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$3.run(PartRenderingEngine.java:841)
                at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.removeGui(PartRenderingEngine.java:825)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeRemoveGui(PartRenderingEngine.java:880)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$1(PartRenderingEngine.java:846)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$3.run(PartRenderingEngine.java:841)
                at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.removeGui(PartRenderingEngine.java:825)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeRemoveGui(PartRenderingEngine.java:880)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$1(PartRenderingEngine.java:846)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$3.run(PartRenderingEngine.java:841)
                at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.removeGui(PartRenderingEngine.java:825)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeRemoveGui(PartRenderingEngine.java:880)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$1(PartRenderingEngine.java:846)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$3.run(PartRenderingEngine.java:841)
                at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.removeGui(PartRenderingEngine.java:825)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeRemoveGui(PartRenderingEngine.java:880)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$1(PartRenderingEngine.java:846)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$3.run(PartRenderingEngine.java:841)
                at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.removeGui(PartRenderingEngine.java:825)
                at org.eclipse.ui.internal.WorkbenchWindow.hardClose(WorkbenchWindow.java:1976)
                at org.eclipse.ui.internal.WorkbenchWindow.busyClose(WorkbenchWindow.java:1598)
                at org.eclipse.ui.internal.WorkbenchWindow.access$16(WorkbenchWindow.java:1540)
                at org.eclipse.ui.internal.WorkbenchWindow$11.run(WorkbenchWindow.java:1626)
                at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
                at org.eclipse.ui.internal.WorkbenchWindow.close(WorkbenchWindow.java:1623)
                at org.eclipse.ui.internal.Workbench$14.run(Workbench.java:1194)
                at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
                at org.eclipse.ui.internal.Workbench.busyClose(Workbench.java:1176)
                at org.eclipse.ui.internal.Workbench.access$22(Workbench.java:1118)
                at org.eclipse.ui.internal.Workbench$19.run(Workbench.java:1459)
                at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
                at org.eclipse.ui.internal.Workbench.close(Workbench.java:1456)
                at org.eclipse.ui.internal.Workbench.close(Workbench.java:1429)
                at org.eclipse.ui.internal.WorkbenchWindow.busyClose(WorkbenchWindow.java:1594)
                at org.eclipse.ui.internal.WorkbenchWindow.access$16(WorkbenchWindow.java:1540)
                at org.eclipse.ui.internal.WorkbenchWindow$11.run(WorkbenchWindow.java:1626)
                at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
                at org.eclipse.ui.internal.WorkbenchWindow.close(WorkbenchWindow.java:1623)
                at org.eclipse.ui.internal.WorkbenchWindow.close(WorkbenchWindow.java:1637)
                at org.eclipse.ui.internal.WorkbenchWindow$6.close(WorkbenchWindow.java:524)
                at org.eclipse.e4.ui.workbench.renderers.swt.WBWRenderer$7.shellClosed(WBWRenderer.java:629)
                at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:99)
                at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
                at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4418)
                at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1079)
                at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1103)
                at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1088)
                at org.eclipse.swt.widgets.Decorations.closeWidget(Decorations.java:315)
                at org.eclipse.swt.widgets.Decorations.WM_CLOSE(Decorations.java:1728)
                at org.eclipse.swt.widgets.Control.windowProc(Control.java:4801)
                at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:359)
                at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1656)
                at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2199)
                at org.eclipse.swt.widgets.Display.windowProc(Display.java:5110)
                at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
                at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2547)
                at org.eclipse.swt.widgets.Shell.callWindowProc(Shell.java:506)
                at org.eclipse.swt.widgets.Control.windowProc(Control.java:4897)
                at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:359)
                at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1656)
                at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2199)
                at org.eclipse.swt.widgets.Display.windowProc(Display.java:5110)
                at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
                at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2547)
                at org.eclipse.swt.widgets.Shell.callWindowProc(Shell.java:506)
                at org.eclipse.swt.widgets.Control.windowProc(Control.java:4897)
                at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:359)
                at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1656)
                at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2199)
                at org.eclipse.swt.widgets.Display.windowProc(Display.java:5110)
                at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
                at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2552)
                at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3822)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1121)
                at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1022)
                at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:150)
                at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:693)
                at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
                at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:610)
                at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)
                at eu.etaxonomy.taxeditor.Application.start(Application.java:20)
                at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
                at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
                at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
                at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)
                at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)
                at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
                at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
                at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
                at java.lang.reflect.Method.invoke(Unknown Source)
                at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:673)
                at org.eclipse.equinox.launcher.Main.basicRun(Main.java:610)
                at org.eclipse.equinox.launcher.Main.run(Main.java:1519)
Caused by: org.eclipse.e4.core.di.InjectionException: org.eclipse.e4.core.di.InjectionException: org.eclipse.e4.core.di.InjectionException: org.eclipse.e4.core.di.InjectionException: java.util.ConcurrentModificationException
                at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:65)
                at org.eclipse.e4.core.internal.contexts.ContextObjectSupplier$ContextInjectionListener.update(ContextObjectSupplier.java:90)
                at org.eclipse.e4.core.internal.contexts.TrackableComputationExt.update(TrackableComputationExt.java:111)
                at org.eclipse.e4.core.internal.contexts.EclipseContext.processScheduled(EclipseContext.java:344)
                at org.eclipse.e4.core.internal.contexts.EclipseContext.set(EclipseContext.java:359)
                at org.eclipse.e4.core.internal.contexts.EclipseContext.activate(EclipseContext.java:664)
                at org.eclipse.e4.core.internal.contexts.EclipseContext.activateBranch(EclipseContext.java:670)
                at org.eclipse.e4.ui.internal.workbench.PartActivationHistory.activate(PartActivationHistory.java:53)
                at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:747)
                at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:682)
                at org.eclipse.e4.ui.internal.workbench.swt.AbstractPartRenderer.activate(AbstractPartRenderer.java:95)
                at org.eclipse.e4.ui.workbench.renderers.swt.ContributedPartRenderer$1.handleEvent(ContributedPartRenderer.java:63)
                at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
                at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4418)
                at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1079)
                at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1103)
                at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1088)
                at org.eclipse.swt.widgets.Shell.setActiveControl(Shell.java:1542)
                at org.eclipse.swt.widgets.Shell.setActiveControl(Shell.java:1505)
                at org.eclipse.swt.widgets.Control.sendFocusEvent(Control.java:2948)
                at org.eclipse.swt.widgets.Widget.wmSetFocus(Widget.java:2437)
                at org.eclipse.swt.widgets.Control.WM_SETFOCUS(Control.java:5446)
                at org.eclipse.swt.widgets.Control.windowProc(Control.java:4869)
                at org.eclipse.swt.widgets.Display.windowProc(Display.java:5110)
                at org.eclipse.swt.internal.win32.OS.DestroyWindow(Native Method)
                at org.eclipse.swt.widgets.Control.destroyWidget(Control.java:795)
                at org.eclipse.swt.widgets.Widget.release(Widget.java:846)
                at org.eclipse.swt.widgets.Widget.dispose(Widget.java:460)
                at eu.etaxonomy.taxeditor.ui.element.CdmFormFactory.destroyElement(CdmFormFactory.java:613)
                at eu.etaxonomy.taxeditor.ui.element.CdmFormFactory.destroyElement(CdmFormFactory.java:602)
                at eu.etaxonomy.taxeditor.ui.element.CdmFormFactory.destroyElement(CdmFormFactory.java:602)
                at eu.etaxonomy.taxeditor.ui.element.CdmFormFactory.destroyElement(CdmFormFactory.java:602)
                at eu.etaxonomy.taxeditor.ui.element.CdmFormFactory.destroyElement(CdmFormFactory.java:602)
                at eu.etaxonomy.taxeditor.ui.element.CdmFormFactory.destroyElement(CdmFormFactory.java:602)
                at eu.etaxonomy.taxeditor.view.e4.AbstractCdmDataViewer.destroySections(AbstractCdmDataViewer.java:179)
                at eu.etaxonomy.taxeditor.view.e4.details.DetailsPartE4.showEmptyPage(DetailsPartE4.java:124)
                at eu.etaxonomy.taxeditor.view.e4.AbstractCdmEditorPartE4.selectionChanged(AbstractCdmEditorPartE4.java:160)
                at sun.reflect.GeneratedMethodAccessor24.invoke(Unknown Source)
                at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
                at java.lang.reflect.Method.invoke(Unknown Source)
                at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:55)
                ... 141 more
Caused by: org.eclipse.e4.core.di.InjectionException: org.eclipse.e4.core.di.InjectionException: org.eclipse.e4.core.di.InjectionException: java.util.ConcurrentModificationException
                at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:65)
                at org.eclipse.e4.core.internal.contexts.ContextObjectSupplier$ContextInjectionListener.update(ContextObjectSupplier.java:90)
                at org.eclipse.e4.core.internal.contexts.TrackableComputationExt.update(TrackableComputationExt.java:111)
                at org.eclipse.e4.core.internal.contexts.EclipseContext.processScheduled(EclipseContext.java:344)
                at org.eclipse.e4.core.internal.contexts.EclipseContext.set(EclipseContext.java:359)
                at org.eclipse.e4.ui.internal.workbench.SelectionAggregator.setPart(SelectionAggregator.java:115)
                at sun.reflect.GeneratedMethodAccessor53.invoke(Unknown Source)
                at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
                at java.lang.reflect.Method.invoke(Unknown Source)
                at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:55)
                ... 181 more
Caused by: org.eclipse.e4.core.di.InjectionException: org.eclipse.e4.core.di.InjectionException: java.util.ConcurrentModificationException
                at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:65)
                at org.eclipse.e4.core.internal.contexts.ContextObjectSupplier$ContextInjectionListener.update(ContextObjectSupplier.java:90)
                at org.eclipse.e4.core.internal.contexts.TrackableComputationExt.update(TrackableComputationExt.java:111)
                at org.eclipse.e4.core.internal.contexts.EclipseContext.processScheduled(EclipseContext.java:344)
                at org.eclipse.e4.core.internal.contexts.EclipseContext.set(EclipseContext.java:359)
                at org.eclipse.e4.core.internal.contexts.EclipseContext.activate(EclipseContext.java:664)
                at org.eclipse.e4.core.internal.contexts.EclipseContext.activateBranch(EclipseContext.java:670)
                at org.eclipse.e4.ui.internal.workbench.PartActivationHistory.activate(PartActivationHistory.java:53)
                at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:747)
                at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:682)
                at org.eclipse.e4.ui.internal.workbench.swt.AbstractPartRenderer.activate(AbstractPartRenderer.java:95)
                at org.eclipse.e4.ui.workbench.renderers.swt.ContributedPartRenderer$1.handleEvent(ContributedPartRenderer.java:63)
                at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
                at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4418)
                at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1079)
                at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1103)
                at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1088)
                at org.eclipse.swt.widgets.Shell.setActiveControl(Shell.java:1542)
                at org.eclipse.swt.widgets.Shell.setActiveControl(Shell.java:1505)
                at org.eclipse.swt.widgets.Control.sendFocusEvent(Control.java:2948)
                at org.eclipse.swt.widgets.Widget.wmSetFocus(Widget.java:2437)
                at org.eclipse.swt.widgets.Control.WM_SETFOCUS(Control.java:5446)
                at org.eclipse.swt.widgets.Control.windowProc(Control.java:4869)
                at org.eclipse.swt.widgets.Display.windowProc(Display.java:5110)
                at org.eclipse.swt.internal.win32.OS.DestroyWindow(Native Method)
                at org.eclipse.swt.widgets.Control.destroyWidget(Control.java:795)
                at org.eclipse.swt.widgets.Widget.release(Widget.java:846)
                at org.eclipse.swt.widgets.Widget.dispose(Widget.java:460)
                at eu.etaxonomy.taxeditor.ui.element.CdmFormFactory.destroyElement(CdmFormFactory.java:613)
                at eu.etaxonomy.taxeditor.ui.element.CdmFormFactory.destroyElement(CdmFormFactory.java:602)
                at eu.etaxonomy.taxeditor.ui.element.CdmFormFactory.destroyElement(CdmFormFactory.java:602)
                at eu.etaxonomy.taxeditor.ui.element.CdmFormFactory.destroyElement(CdmFormFactory.java:602)
                at eu.etaxonomy.taxeditor.ui.element.CdmFormFactory.destroyElement(CdmFormFactory.java:602)
                at eu.etaxonomy.taxeditor.ui.element.CdmFormFactory.destroyElement(CdmFormFactory.java:602)
                at eu.etaxonomy.taxeditor.view.e4.AbstractCdmDataViewer.destroySections(AbstractCdmDataViewer.java:179)
                at eu.etaxonomy.taxeditor.view.e4.details.DetailsPartE4.showEmptyPage(DetailsPartE4.java:124)
                at eu.etaxonomy.taxeditor.view.e4.AbstractCdmEditorPartE4.selectionChanged(AbstractCdmEditorPartE4.java:160)
                at sun.reflect.GeneratedMethodAccessor24.invoke(Unknown Source)
                at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
                at java.lang.reflect.Method.invoke(Unknown Source)
                at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:55)
                ... 190 more
Caused by: org.eclipse.e4.core.di.InjectionException: java.util.ConcurrentModificationException
                at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:65)
                at org.eclipse.e4.core.internal.contexts.ContextObjectSupplier$ContextInjectionListener.update(ContextObjectSupplier.java:90)
                at org.eclipse.e4.core.internal.contexts.TrackableComputationExt.update(TrackableComputationExt.java:111)
                at org.eclipse.e4.core.internal.contexts.EclipseContext.processScheduled(EclipseContext.java:344)
                at org.eclipse.e4.core.internal.contexts.EclipseContext.set(EclipseContext.java:359)
                at org.eclipse.e4.ui.internal.workbench.SelectionAggregator.setPart(SelectionAggregator.java:115)
                at sun.reflect.GeneratedMethodAccessor53.invoke(Unknown Source)
                at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
                at java.lang.reflect.Method.invoke(Unknown Source)
                at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:55)
                ... 230 more
Caused by: java.util.ConcurrentModificationException
                at java.util.HashMap$HashIterator.nextNode(Unknown Source)
                at java.util.HashMap$KeyIterator.next(Unknown Source)
                at eu.etaxonomy.taxeditor.ui.element.CdmFormFactory.destroyElement(CdmFormFactory.java:605)
                at eu.etaxonomy.taxeditor.ui.element.CdmFormFactory.destroyElement(CdmFormFactory.java:602)
                at eu.etaxonomy.taxeditor.ui.element.CdmFormFactory.destroyElement(CdmFormFactory.java:602)
                at eu.etaxonomy.taxeditor.view.e4.AbstractCdmDataViewer.destroySections(AbstractCdmDataViewer.java:179)
                at eu.etaxonomy.taxeditor.view.e4.details.DetailsPartE4.showEmptyPage(DetailsPartE4.java:124)
                at eu.etaxonomy.taxeditor.view.e4.AbstractCdmEditorPartE4.selectionChanged(AbstractCdmEditorPartE4.java:160)
                at sun.reflect.GeneratedMethodAccessor24.invoke(Unknown Source)
                at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
                at java.lang.reflect.Method.invoke(Unknown Source)
                at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:55)
                ... 239 more

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