EDIT

1. Create a type specimen for a taxon
2. Delete the specimen in the specimen hierarchy editor
3. switch back to the taxon name editor This even happens after a reconnect

login : admin
editor version : 4.8.0.qualifier
server : localhost (localhost-dev)
schema version : 4.1.0.0.201607300000
os : Linux 4.4.0-53-generic amd64
java : 1.8.0_121
java.lang.NullPointerException: CDM Entity of type eu.etaxonomy.cdm.model.occurrence.DerivedUnit with id 31 is null.
    at eu.etaxonomy.taxeditor.service.CachedCommonServiceImpl.find(CachedCommonServiceImpl.java:47)
    at org.hibernate.proxy.AbstractLazyInitializer.remoteInitialize(AbstractLazyInitializer.java:451)
    at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:167)
    at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:297)
    at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:68)
    at eu.etaxonomy.cdm.model.occurrence.DerivedUnit_$$_jvst5cb_c.equals(DerivedUnit_$$_jvst5cb_c.java)
    at eu.etaxonomy.taxeditor.ui.element.SelectionArbitrator.selectionChanged(SelectionArbitrator.java:149)
    at org.eclipse.jface.viewers.Viewer$1.run(Viewer.java:158)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:50)
    at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:173)
    at org.eclipse.jface.viewers.Viewer.fireSelectionChanged(Viewer.java:155)
    at eu.etaxonomy.taxeditor.view.detail.DetailsViewer.setSelection(DetailsViewer.java:356)
    at org.eclipse.jface.viewers.Viewer.setSelection(Viewer.java:383)
    at eu.etaxonomy.taxeditor.view.AbstractCdmDataViewer.setInput(AbstractCdmDataViewer.java:108)
    at eu.etaxonomy.taxeditor.view.detail.DetailsViewer.setInput(DetailsViewer.java:161)
    at eu.etaxonomy.taxeditor.view.AbstractCdmViewPart.showViewer(AbstractCdmViewPart.java:118)
    at eu.etaxonomy.taxeditor.view.detail.DetailsViewPart.selectionChanged_internal(DetailsViewPart.java:95)
    at eu.etaxonomy.taxeditor.view.AbstractCdmEditorViewPart$DelaySelection.run(AbstractCdmEditorViewPart.java:52)
    at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
    at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:182)
    at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4536)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4154)
    at org.eclipse.jface.window.Window.runEventLoop(Window.java:818)
    at org.eclipse.jface.window.Window.open(Window.java:794)
    at org.eclipse.jface.dialogs.ErrorDialog.open(ErrorDialog.java:346)
    at eu.etaxonomy.taxeditor.model.MessagingUtils$1.run(MessagingUtils.java:279)
    at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
    at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:182)
    at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4536)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4154)
    at org.eclipse.jface.window.Window.runEventLoop(Window.java:818)
    at org.eclipse.jface.window.Window.open(Window.java:794)
    at org.eclipse.jface.dialogs.ErrorDialog.open(ErrorDialog.java:346)
    at eu.etaxonomy.taxeditor.model.MessagingUtils$1.run(MessagingUtils.java:279)
    at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
    at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:182)
    at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4536)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4154)
    at org.eclipse.jface.window.Window.runEventLoop(Window.java:818)
    at org.eclipse.jface.window.Window.open(Window.java:794)
    at org.eclipse.jface.dialogs.ErrorDialog.open(ErrorDialog.java:346)
    at eu.etaxonomy.taxeditor.model.MessagingUtils$1.run(MessagingUtils.java:279)
    at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
    at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:182)
    at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4536)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4154)
    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)
    at org.eclipse.equinox.launcher.Main.main(Main.java:1492)