Sometimes when I startup my RCP app, I get the following Exception Caused by: java.lang.NullPointerException at org.eclipse.ui.internal.WorkbenchPage.updateActiveEditorSources(WorkbenchPage.java:359) at org.eclipse.ui.internal.WorkbenchPage.updateActivations(WorkbenchPage.java:238) at org.eclipse.ui.internal.WorkbenchPage.access$11(WorkbenchPage.java:230) at org.eclipse.ui.internal.WorkbenchPage$E4PartListener.partActivated(WorkbenchPage.java:158) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.firePartActivated(PartServiceImpl.java:176) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.setPart(PartServiceImpl.java:150) 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.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:56) It seems to find the editor, but the siteId is missing (just my guess)
When I clean the workspace everything is fine, So I guess its related to my elementFactories. I saw it happen in production too, but I have no clue, cause I am not able to reproduce it consistently. Do you have an idea where this comes from? Could this be an Exception thrown in my editorInput? Regards Thomas
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