IllegalStateException: Preference node "org.eclipse.jdt.core" has been removed.

[HannesWell]

Recently I often get many errors like the one below saying Preference node "org.eclipse.jdt.core" has been removed. The stack-trace is often different, coming from different code-paths but always ends at org.eclipse.jdt.internal.core.JavaModelManager.getOption(JavaModelManager.java:2311) trying to read from a removed preference node.

The affected project don't have project specific settings and therefore no .settings/jdt..prefs file. But that worked well in the past. The errors mainly show up while interactive rebasing but then can be annoying because a lot of things start to fail and I get multiple windows popping up warning me about failures for example in the clean-up actions or while reconceiling the AST.

The Eclipse-IDE is Version: 2022-06 M1 (4.24.0 M1), Build id: 20220414-1707

Java Model Exception: java.lang.IllegalStateException: Preference node "org.eclipse.jdt.core" has been removed.
    at org.eclipse.jdt.internal.core.CompilationUnitProblemFinder.process(CompilationUnitProblemFinder.java:326)
    at org.eclipse.jdt.internal.core.CompilationUnitProblemFinder.process(CompilationUnitProblemFinder.java:348)
    at org.eclipse.jdt.internal.core.ReconcileWorkingCopyOperation.makeConsistent(ReconcileWorkingCopyOperation.java:193)
    at org.eclipse.jdt.internal.core.ReconcileWorkingCopyOperation.executeOperation(ReconcileWorkingCopyOperation.java:94)
    at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:740)
    at org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation.java:806)
    at org.eclipse.jdt.internal.core.CompilationUnit.reconcile(CompilationUnit.java:1319)
    at org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrategy.reconcile(JavaReconcilingStrategy.java:132)
    at org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrategy$1.run(JavaReconcilingStrategy.java:94)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
    at org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrategy.reconcile(JavaReconcilingStrategy.java:91)
    at org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrategy.reconcile(JavaReconcilingStrategy.java:158)
    at org.eclipse.jdt.internal.ui.text.CompositeReconcilingStrategy.reconcile(CompositeReconcilingStrategy.java:94)
    at org.eclipse.jdt.internal.ui.text.JavaCompositeReconcilingStrategy.reconcile(JavaCompositeReconcilingStrategy.java:107)
    at org.eclipse.jface.text.reconciler.MonoReconciler.process(MonoReconciler.java:76)
    at org.eclipse.jface.text.reconciler.AbstractReconciler$BackgroundThread.run(AbstractReconciler.java:207)
Caused by: java.lang.IllegalStateException: Preference node "org.eclipse.jdt.core" has been removed.
    at org.eclipse.core.internal.preferences.EclipsePreferences.checkRemoved(EclipsePreferences.java:165)
    at org.eclipse.core.internal.resources.ProjectPreferences.internalGet(ProjectPreferences.java:495)
    at org.eclipse.core.internal.preferences.EclipsePreferences.get(EclipsePreferences.java:444)
    at org.eclipse.jdt.internal.core.JavaModelManager.getOption(JavaModelManager.java:2311)
    at org.eclipse.jdt.internal.core.JavaProject.getOption(JavaProject.java:2148)
    at org.eclipse.jdt.internal.core.AbstractClassFile.validateClassFile(AbstractClassFile.java:416)
    at org.eclipse.jdt.internal.core.AbstractClassFile.validateExistence(AbstractClassFile.java:498)
    at org.eclipse.jdt.internal.core.Openable.generateInfos(Openable.java:252)
    at org.eclipse.jdt.internal.core.JavaElement.openWhenClosed(JavaElement.java:597)
    at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:328)
    at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:314)
    at org.eclipse.jdt.internal.core.JavaElement.exists(JavaElement.java:231)
    at org.eclipse.jdt.internal.core.Openable.exists(Openable.java:208)
    at org.eclipse.jdt.internal.core.ModularClassFile.exists(ModularClassFile.java:317)
    at org.eclipse.jdt.internal.core.PackageFragmentRoot.getSourceModuleDescription(PackageFragmentRoot.java:927)
    at org.eclipse.jdt.internal.core.PackageFragmentRoot.getModuleDescription(PackageFragmentRoot.java:904)
    at org.eclipse.jdt.internal.core.JarPackageFragmentRoot.getModuleDescription(JarPackageFragmentRoot.java:307)
    at org.eclipse.jdt.internal.core.NameLookup.getModuleDescription(NameLookup.java:944)
    at org.eclipse.jdt.internal.core.SearchableEnvironment.getModuleDescription(SearchableEnvironment.java:1085)
    at org.eclipse.jdt.internal.core.SearchableEnvironment.getModulesDeclaringPackage(SearchableEnvironment.java:1015)
    at org.eclipse.jdt.internal.compiler.env.IModuleAwareNameEnvironment.getUniqueModulesDeclaringPackage(IModuleAwareNameEnvironment.java:113)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.computePackageFrom(LookupEnvironment.java:745)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.getTypeFromCompoundName(LookupEnvironment.java:1771)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.getTypeFromConstantPoolName(LookupEnvironment.java:1821)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.getTypeFromConstantPoolName(LookupEnvironment.java:1829)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.getTypeFromSignature(LookupEnvironment.java:1899)
    at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.createFields(BinaryTypeBinding.java:860)
    at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.cachePartsFrom(BinaryTypeBinding.java:610)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.createBinaryTypeFrom(LookupEnvironment.java:1055)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.createBinaryTypeFrom(LookupEnvironment.java:1036)
    at org.eclipse.jdt.internal.compiler.Compiler.accept(Compiler.java:308)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:257)
    at org.eclipse.jdt.internal.compiler.lookup.UnresolvedReferenceBinding.resolve(UnresolvedReferenceBinding.java:114)
    at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.resolveType(BinaryTypeBinding.java:248)
    at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getTypeOrPackage(PackageBinding.java:252)
    at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.findImport(CompilationUnitScope.java:551)
    at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.findSingleImport(CompilationUnitScope.java:623)
    at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.faultInImports(CompilationUnitScope.java:452)
    at org.eclipse.jdt.internal.compiler.lookup.Scope.getBinding(Scope.java:2221)
    at org.eclipse.jdt.internal.compiler.ast.FieldDeclaration.resolve(FieldDeclaration.java:235)
    at org.eclipse.jdt.internal.compiler.lookup.FieldBinding.constant(FieldBinding.java:223)
    at org.eclipse.jdt.internal.compiler.ast.FieldReference.generateCode(FieldReference.java:254)
    at org.eclipse.jdt.internal.compiler.ast.Expression.generateOptimizedStringConcatenation(Expression.java:893)
    at org.eclipse.jdt.internal.compiler.codegen.CodeStream.generateStringConcatenationAppend(CodeStream.java:2635)
    at org.eclipse.jdt.internal.compiler.ast.BinaryExpression.generateCode(BinaryExpression.java:157)
    at org.eclipse.jdt.internal.compiler.ast.ConditionalExpression.generateCode(ConditionalExpression.java:313)
    at org.eclipse.jdt.internal.compiler.ast.Statement.generateArguments(Statement.java:443)
    at org.eclipse.jdt.internal.compiler.ast.AllocationExpression.generateCode(AllocationExpression.java:212)
    at org.eclipse.jdt.internal.compiler.ast.ReturnStatement.generateCode(ReturnStatement.java:211)
    at org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.generateCode(AbstractMethodDeclaration.java:354)
    at org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.generateCode(AbstractMethodDeclaration.java:291)
    at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.generateCode(TypeDeclaration.java:761)
    at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.generateCode(TypeDeclaration.java:831)
    at org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration.generateCode(CompilationUnitDeclaration.java:412)
    at org.eclipse.jdt.internal.compiler.Compiler.resolve(Compiler.java:1072)
    at org.eclipse.jdt.internal.compiler.Compiler.resolve(Compiler.java:1108)
    at org.eclipse.jdt.internal.core.CompilationUnitProblemFinder.process(CompilationUnitProblemFinder.java:282)
    ... 15 more
Caused by: java.lang.IllegalStateException: Preference node "org.eclipse.jdt.core" has been removed.
    at org.eclipse.core.internal.preferences.EclipsePreferences.checkRemoved(EclipsePreferences.java:165)
    at org.eclipse.core.internal.resources.ProjectPreferences.internalGet(ProjectPreferences.java:495)
    at org.eclipse.core.internal.preferences.EclipsePreferences.get(EclipsePreferences.java:444)
    at org.eclipse.jdt.internal.core.JavaModelManager.getOption(JavaModelManager.java:2311)
    at org.eclipse.jdt.internal.core.JavaProject.getOption(JavaProject.java:2148)
    at org.eclipse.jdt.internal.core.AbstractClassFile.validateClassFile(AbstractClassFile.java:416)
    at org.eclipse.jdt.internal.core.AbstractClassFile.validateExistence(AbstractClassFile.java:498)
    at org.eclipse.jdt.internal.core.Openable.generateInfos(Openable.java:252)
    at org.eclipse.jdt.internal.core.JavaElement.openWhenClosed(JavaElement.java:597)
    at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:328)
    at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:314)
    at org.eclipse.jdt.internal.core.JavaElement.exists(JavaElement.java:231)
    at org.eclipse.jdt.internal.core.Openable.exists(Openable.java:208)
    at org.eclipse.jdt.internal.core.ModularClassFile.exists(ModularClassFile.java:317)
    at org.eclipse.jdt.internal.core.PackageFragmentRoot.getSourceModuleDescription(PackageFragmentRoot.java:927)
    at org.eclipse.jdt.internal.core.PackageFragmentRoot.getModuleDescription(PackageFragmentRoot.java:904)
    at org.eclipse.jdt.internal.core.JarPackageFragmentRoot.getModuleDescription(JarPackageFragmentRoot.java:307)
    at org.eclipse.jdt.internal.core.NameLookup.getModuleDescription(NameLookup.java:944)
    at org.eclipse.jdt.internal.core.SearchableEnvironment.getModuleDescription(SearchableEnvironment.java:1085)
    at org.eclipse.jdt.internal.core.SearchableEnvironment.getModulesDeclaringPackage(SearchableEnvironment.java:1015)
    at org.eclipse.jdt.internal.compiler.env.IModuleAwareNameEnvironment.getUniqueModulesDeclaringPackage(IModuleAwareNameEnvironment.java:113)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.computePackageFrom(LookupEnvironment.java:745)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.getTypeFromCompoundName(LookupEnvironment.java:1771)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.getTypeFromConstantPoolName(LookupEnvironment.java:1821)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.getTypeFromConstantPoolName(LookupEnvironment.java:1829)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.getTypeFromSignature(LookupEnvironment.java:1899)
    at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.createFields(BinaryTypeBinding.java:860)
    at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.cachePartsFrom(BinaryTypeBinding.java:610)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.createBinaryTypeFrom(LookupEnvironment.java:1055)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.createBinaryTypeFrom(LookupEnvironment.java:1036)
    at org.eclipse.jdt.internal.compiler.Compiler.accept(Compiler.java:308)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:257)
    at org.eclipse.jdt.internal.compiler.lookup.UnresolvedReferenceBinding.resolve(UnresolvedReferenceBinding.java:114)
    at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.resolveType(BinaryTypeBinding.java:248)
    at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getTypeOrPackage(PackageBinding.java:252)
    at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.findImport(CompilationUnitScope.java:551)
    at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.findSingleImport(CompilationUnitScope.java:623)
    at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.faultInImports(CompilationUnitScope.java:452)
    at org.eclipse.jdt.internal.compiler.lookup.Scope.getBinding(Scope.java:2221)
    at org.eclipse.jdt.internal.compiler.ast.FieldDeclaration.resolve(FieldDeclaration.java:235)
    at org.eclipse.jdt.internal.compiler.lookup.FieldBinding.constant(FieldBinding.java:223)
    at org.eclipse.jdt.internal.compiler.ast.FieldReference.generateCode(FieldReference.java:254)
    at org.eclipse.jdt.internal.compiler.ast.Expression.generateOptimizedStringConcatenation(Expression.java:893)
    at org.eclipse.jdt.internal.compiler.codegen.CodeStream.generateStringConcatenationAppend(CodeStream.java:2635)
    at org.eclipse.jdt.internal.compiler.ast.BinaryExpression.generateCode(BinaryExpression.java:157)
    at org.eclipse.jdt.internal.compiler.ast.ConditionalExpression.generateCode(ConditionalExpression.java:313)
    at org.eclipse.jdt.internal.compiler.ast.Statement.generateArguments(Statement.java:443)
    at org.eclipse.jdt.internal.compiler.ast.AllocationExpression.generateCode(AllocationExpression.java:212)
    at org.eclipse.jdt.internal.compiler.ast.ReturnStatement.generateCode(ReturnStatement.java:211)
    at org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.generateCode(AbstractMethodDeclaration.java:354)
    at org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.generateCode(AbstractMethodDeclaration.java:291)
    at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.generateCode(TypeDeclaration.java:761)
    at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.generateCode(TypeDeclaration.java:831)
    at org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration.generateCode(CompilationUnitDeclaration.java:412)
    at org.eclipse.jdt.internal.compiler.Compiler.resolve(Compiler.java:1072)
    at org.eclipse.jdt.internal.compiler.Compiler.resolve(Compiler.java:1108)
    at org.eclipse.jdt.internal.core.CompilationUnitProblemFinder.process(CompilationUnitProblemFinder.java:282)
    at org.eclipse.jdt.internal.core.CompilationUnitProblemFinder.process(CompilationUnitProblemFinder.java:348)
    at org.eclipse.jdt.internal.core.ReconcileWorkingCopyOperation.makeConsistent(ReconcileWorkingCopyOperation.java:193)
    at org.eclipse.jdt.internal.core.ReconcileWorkingCopyOperation.executeOperation(ReconcileWorkingCopyOperation.java:94)
    at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:740)
    at org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation.java:806)
    at org.eclipse.jdt.internal.core.CompilationUnit.reconcile(CompilationUnit.java:1319)
    at org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrategy.reconcile(JavaReconcilingStrategy.java:132)
    at org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrategy$1.run(JavaReconcilingStrategy.java:94)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
    at org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrategy.reconcile(JavaReconcilingStrategy.java:91)
    at org.eclipse.jdt.internal.ui.text.java.JavaReconcilingStrategy.reconcile(JavaReconcilingStrategy.java:158)
    at org.eclipse.jdt.internal.ui.text.CompositeReconcilingStrategy.reconcile(CompositeReconcilingStrategy.java:94)
    at org.eclipse.jdt.internal.ui.text.JavaCompositeReconcilingStrategy.reconcile(JavaCompositeReconcilingStrategy.java:107)
    at org.eclipse.jface.text.reconciler.MonoReconciler.process(MonoReconciler.java:76)
    at org.eclipse.jface.text.reconciler.AbstractReconciler$BackgroundThread.run(AbstractReconciler.java:207)

[HannesWell]

After closing/reopening the projects the error usually vanish.

[iloveeclipse]

After closing/reopening the projects the error usually vanish.

Sounds like a caching issue in org.eclipse.jdt.internal.core.JavaProject.getEclipsePreferences()

I guess this code should catch the exception and clear the cache / request new version on error: [ // Get cached preferences if exist](https://github.com/eclipse-jdt/eclipse.jdt.core/blob/767bffad66d4495412b12caef013d8cca662baef/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/JavaProject.java#L563)

and probably a side effect of https://git.eclipse.org/r/c/platform/eclipse.platform.resources/+/192164

[HannesWell]

Thank you Andrey for your fix!

[iloveeclipse]

Thank you Andrey for your fix!

Please if you use nightly builds, check the next one if that helped or not.

[HannesWell]

I'll try to do that, but from my experience by Oomph-provisioned IDE I use daily it does not work to add the I-build repository as another source. But I will try it again.

[HannesWell]

The good news is I was able to use the I-builds repo in my Oomph setup (it was supprisingly simple. Just had to add the I-builds repo to my Installations P2-Director Task).

The bad news is this error still occurs (but in my subjective impression less frequent):

org.eclipse.ui.PartInitException: Editor could not be initialized.
    at org.eclipse.ui.texteditor.AbstractTextEditor.internalInit(AbstractTextEditor.java:3195)
    at org.eclipse.ui.texteditor.AbstractTextEditor.init(AbstractTextEditor.java:3204)
    at org.eclipse.ui.internal.EditorReference.initialize(EditorReference.java:353)
    at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.create(CompatibilityPart.java:344)
    at jdk.internal.reflect.GeneratedMethodAccessor89.invoke(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58)
    at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:995)
    at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:960)
    at org.eclipse.e4.core.internal.di.InjectorImpl.internalInject(InjectorImpl.java:140)
    at org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:403)
    at org.eclipse.e4.core.internal.di.InjectorImpl.make(InjectorImpl.java:330)
    at org.eclipse.e4.core.contexts.ContextInjectionFactory.make(ContextInjectionFactory.java:202)
    at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.createFromBundle(ReflectionContributionFactory.java:91)
    at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.doCreate(ReflectionContributionFactory.java:60)
    at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.create(ReflectionContributionFactory.java:42)
    at org.eclipse.e4.ui.workbench.renderers.swt.ContributedPartRenderer.createWidget(ContributedPartRenderer.java:132)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createWidget(PartRenderingEngine.java:995)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:659)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:763)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$2.run(PartRenderingEngine.java:728)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:712)
    at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.lambda$0(PartServiceImpl.java:105)
    at org.eclipse.e4.ui.services.internal.events.UIEventHandler.lambda$0(UIEventHandler.java:38)
    at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:236)
    at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:133)
    at org.eclipse.swt.widgets.Display.syncExec(Display.java:5967)
    at org.eclipse.e4.ui.workbench.swt.DisplayUISynchronize.syncExec(DisplayUISynchronize.java:34)
    at org.eclipse.e4.ui.services.internal.events.UIEventHandler.handleEvent(UIEventHandler.java:38)
    at org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:205)
    at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:203)
    at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:1)
    at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:234)
    at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:151)
    at org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:133)
    at org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(EventAdminImpl.java:75)
    at org.eclipse.equinox.internal.event.EventComponent.sendEvent(EventComponent.java:44)
    at org.eclipse.e4.ui.services.internal.events.EventBroker.send(EventBroker.java:55)
    at org.eclipse.e4.ui.internal.workbench.UIEventPublisher.notifyChanged(UIEventPublisher.java:63)
    at org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:424)
    at org.eclipse.e4.ui.model.application.ui.impl.ElementContainerImpl.setSelectedElementGen(ElementContainerImpl.java:170)
    at org.eclipse.e4.ui.model.application.ui.impl.ElementContainerImpl.setSelectedElement(ElementContainerImpl.java:188)
    at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.showElementInWindow(ModelServiceImpl.java:660)
    at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.bringToTop(ModelServiceImpl.java:624)
    at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.delegateBringToTop(PartServiceImpl.java:787)
    at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.bringToTop(PartServiceImpl.java:401)
    at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.showPart(PartServiceImpl.java:1261)
    at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:3207)
    at org.eclipse.ui.internal.WorkbenchPage.lambda$9(WorkbenchPage.java:3097)
    at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:74)
    at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3095)
    at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3065)
    at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3056)
    at org.eclipse.ui.ide.IDE.openEditor(IDE.java:569)
    at org.eclipse.ui.ide.IDE.openEditor(IDE.java:524)
    at org.eclipse.egit.ui.internal.EgitUiEditorUtils.openEditor(EgitUiEditorUtils.java:169)
    at org.eclipse.egit.ui.internal.commit.DiffViewer.openFileInEditor(DiffViewer.java:813)
    at org.eclipse.egit.ui.internal.history.CommitFileDiffViewer$8.lambda$0(CommitFileDiffViewer.java:281)
    at org.eclipse.egit.ui.internal.history.CommitFileDiffViewer.lambda$4(CommitFileDiffViewer.java:407)
    at java.base/java.util.Iterator.forEachRemaining(Iterator.java:133)
    at org.eclipse.egit.ui.internal.history.CommitFileDiffViewer.withSelection(CommitFileDiffViewer.java:405)
    at org.eclipse.egit.ui.internal.history.CommitFileDiffViewer$8.run(CommitFileDiffViewer.java:275)
    at org.eclipse.jface.action.Action.runWithEvent(Action.java:474)
    at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:580)
    at org.eclipse.jface.action.ActionContributionItem.lambda$4(ActionContributionItem.java:414)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
    at org.eclipse.swt.widgets.Display.sendEvent(Display.java:5850)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1529)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:5081)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4533)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1155)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1046)
    at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155)
    at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:644)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:551)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:156)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:152)
    at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:402)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:596)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1467)
    at org.eclipse.equinox.launcher.Main.main(Main.java:1440)
Caused by: java.lang.IllegalStateException: Preference node "org.eclipse.jdt.core" has been removed.
    at org.eclipse.core.internal.preferences.EclipsePreferences.checkRemoved(EclipsePreferences.java:165)
    at org.eclipse.core.internal.resources.ProjectPreferences.internalGet(ProjectPreferences.java:495)
    at org.eclipse.core.internal.preferences.EclipsePreferences.get(EclipsePreferences.java:444)
    at org.eclipse.jdt.internal.core.JavaModelManager.getOption(JavaModelManager.java:2311)
    at org.eclipse.jdt.internal.core.JavaProject.getOption(JavaProject.java:2148)
    at org.eclipse.jdt.internal.core.JavaModelManager.determineIfOnClasspath(JavaModelManager.java:1156)
    at org.eclipse.jdt.internal.core.JavaModelManager.createCompilationUnitFrom(JavaModelManager.java:1094)
    at org.eclipse.jdt.internal.core.JavaModelManager.create(JavaModelManager.java:1010)
    at org.eclipse.jdt.core.JavaCore.create(JavaCore.java:3600)
    at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitDocumentProvider.createCompilationUnit(CompilationUnitDocumentProvider.java:979)
    at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitDocumentProvider.createFileInfo(CompilationUnitDocumentProvider.java:1013)
    at org.eclipse.ui.editors.text.TextFileDocumentProvider.connect(TextFileDocumentProvider.java:481)
    at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitDocumentProvider.connect(CompilationUnitDocumentProvider.java:1284)
    at org.eclipse.ui.texteditor.AbstractTextEditor.doSetInput(AbstractTextEditor.java:4172)
    at org.eclipse.ui.texteditor.StatusTextEditor.doSetInput(StatusTextEditor.java:262)
    at org.eclipse.ui.texteditor.AbstractDecoratedTextEditor.doSetInput(AbstractDecoratedTextEditor.java:1479)
    at org.eclipse.jdt.internal.ui.javaeditor.JavaEditor.internalDoSetInput(JavaEditor.java:2554)
    at org.eclipse.jdt.internal.ui.javaeditor.JavaEditor.doSetInput(JavaEditor.java:2527)
    at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor.doSetInput(CompilationUnitEditor.java:1411)
    at org.eclipse.ui.texteditor.AbstractTextEditor.lambda$1(AbstractTextEditor.java:3162)
    at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:434)
    at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:352)
    at org.eclipse.ui.internal.WorkbenchWindow.lambda$7(WorkbenchWindow.java:2345)
    at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:74)
    at org.eclipse.ui.internal.WorkbenchWindow.run(WorkbenchWindow.java:2343)
    at org.eclipse.ui.texteditor.AbstractTextEditor.internalInit(AbstractTextEditor.java:3179)
    ... 93 more

[HannesWell]

OK hold on, I'm still using org.eclipse.jdt.core - 3.30.0.v20220404-0943 (which is 2022-06 M1). Sorry I did not read the date part of the build-qualifier to end with 0504 and thought it was from yesterday, but it is from one month ago. So obviously I'm not using the I-builds.

So please just disregard my last comment. Sorry for the disturbance.