Open Declaration stopped working in Eclipse

Question

I'm using the Spring Tool Suite version 3.7.3.RELEASE and today the Open Declaration shortcut stopped working out of nowhere for both F3 and Ctrl+Click. I've read a bunch of other similar questions and none of the solutions have been helpful so far. I've tried all of the following:

• Reimport all projects
• Close and reopen all projects
• Restarting Eclipse
• Going into the Preferences and manually setting the Proposals
• Running a maven update with a clean build

When I press F3 over some variable or method name, I get the error pictured below, which is not very descriptive. Any thoughts or ideas on what could be wrong?

Adding log output:

!ENTRY org.eclipse.ui 4 0 2016-06-21 12:05:24.101
!MESSAGE Unhandled event loop exception
!STACK 0
java.lang.NoSuchMethodError: org.eclipse.jdt.internal.compiler.env.NameEnvironmentAnswer.<init>([Lorg/eclipse/jdt/internal/compiler/env/ISourceType;Lorg/eclipse/jdt/internal/compiler/env/AccessRestriction;)V
    at org.eclipse.ajdt.core.codeconversion.ITDAwareNameEnvironment.find(ITDAwareNameEnvironment.java:115)
    at org.eclipse.jdt.internal.core.SearchableEnvironment.findType(SearchableEnvironment.java:305)
    at org.eclipse.jdt.internal.core.CancelableNameEnvironment.findType(CancelableNameEnvironment.java:45)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:174)
    at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getTypeOrPackage(PackageBinding.java:201)
    at org.eclipse.jdt.internal.compiler.lookup.Scope.getTypeOrPackage(Scope.java:3227)
    at org.eclipse.jdt.internal.compiler.lookup.Scope.getType(Scope.java:2939)
    at org.eclipse.jdt.internal.compiler.ast.SingleTypeReference.getTypeBinding(SingleTypeReference.java:51)
    at org.eclipse.jdt.internal.compiler.ast.TypeReference.internalResolveType(TypeReference.java:495)
    at org.eclipse.jdt.internal.compiler.ast.TypeReference.resolveType(TypeReference.java:594)
    at org.eclipse.jdt.internal.compiler.ast.TypeReference.resolveType(TypeReference.java:590)
    at org.eclipse.jdt.internal.compiler.ast.TypeReference.resolveSuperType(TypeReference.java:564)
    at org.eclipse.jdt.internal.compiler.lookup.ClassScope.findSupertype(ClassScope.java:1320)
    at org.eclipse.jdt.internal.compiler.lookup.ClassScope.connectSuperclass(ClassScope.java:952)
    at org.eclipse.jdt.internal.compiler.lookup.ClassScope.connectTypeHierarchy(ClassScope.java:1113)
    at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.connectTypeHierarchy(CompilationUnitScope.java:324)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.completeTypeBindings(LookupEnvironment.java:312)
    at org.eclipse.jdt.internal.codeassist.SelectionEngine.select(SelectionEngine.java:973)
    at org.eclipse.jdt.internal.core.Openable.codeSelect(Openable.java:163)
    at org.eclipse.jdt.internal.core.CompilationUnit.codeSelect(CompilationUnit.java:377)
    at org.eclipse.jdt.internal.core.CompilationUnit.codeSelect_aroundBody0(CompilationUnit.java:371)
    at org.eclipse.jdt.internal.core.CompilationUnit$AjcClosure1.run(CompilationUnit.java:1)
    at org.eclipse.contribution.jdt.itdawareness.ITDAwarenessAspect.ajc$around$org_eclipse_contribution_jdt_itdawareness_ITDAwarenessAspect$6$3f3ffce8proceed(ITDAwarenessAspect.aj:311)
    at org.eclipse.contribution.jdt.itdawareness.ITDAwarenessAspect.ajc$around$org_eclipse_contribution_jdt_itdawareness_ITDAwarenessAspect$6$3f3ffce8(ITDAwarenessAspect.aj:312)
    at org.eclipse.jdt.internal.core.CompilationUnit.codeSelect(CompilationUnit.java:371)
    at org.eclipse.jdt.internal.ui.javaeditor.JavaElementHyperlinkDetector.detectHyperlinks(JavaElementHyperlinkDetector.java:103)
    at org.eclipse.ui.texteditor.HyperlinkDetectorRegistry$HyperlinkDetectorDelegate.detectHyperlinks(HyperlinkDetectorRegistry.java:78)
    at org.eclipse.jface.text.hyperlink.HyperlinkManager.findHyperlinks(HyperlinkManager.java:287)
    at org.eclipse.jface.text.hyperlink.HyperlinkManager.findHyperlinks(HyperlinkManager.java:259)
    at org.eclipse.jface.text.hyperlink.HyperlinkManager.mouseMove(HyperlinkManager.java:455)
    at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:213)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
    at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4415)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1079)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4233)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3821)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1119)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1020)
    at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:150)
    at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:692)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:605)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:138)
    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:497)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:670)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:609)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1516)
    at org.eclipse.equinox.launcher.Main.main(Main.java:1489)

This might also be relevant:

!ENTRY org.eclipse.core.jobs 4 2 2016-06-21 12:08:52.470
!MESSAGE An internal error occurred during: "Compute launch button tooltip".
!STACK 0
java.lang.NoSuchMethodError: org.eclipse.jdt.internal.compiler.env.NameEnvironmentAnswer.<init>([Lorg/eclipse/jdt/internal/compiler/env/ISourceType;Lorg/eclipse/jdt/internal/compiler/env/AccessRestriction;)V
    at org.eclipse.ajdt.core.codeconversion.ITDAwareNameEnvironment.find(ITDAwareNameEnvironment.java:115)
    at org.eclipse.jdt.internal.core.SearchableEnvironment.findType(SearchableEnvironment.java:305)
    at org.eclipse.jdt.internal.core.CancelableNameEnvironment.findType(CancelableNameEnvironment.java:45)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:174)
    at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getTypeOrPackage(PackageBinding.java:201)
    at org.eclipse.jdt.internal.compiler.lookup.Scope.getTypeOrPackage(Scope.java:3227)
    at org.eclipse.jdt.internal.compiler.lookup.Scope.getType(Scope.java:2939)
    at org.eclipse.jdt.internal.compiler.ast.SingleTypeReference.getTypeBinding(SingleTypeReference.java:51)
    at org.eclipse.jdt.internal.compiler.ast.TypeReference.internalResolveType(TypeReference.java:495)
    at org.eclipse.jdt.internal.compiler.ast.TypeReference.resolveType(TypeReference.java:594)
    at org.eclipse.jdt.internal.compiler.ast.TypeReference.resolveType(TypeReference.java:590)
    at org.eclipse.jdt.internal.compiler.ast.TypeReference.resolveSuperType(TypeReference.java:564)
    at org.eclipse.jdt.internal.compiler.lookup.ClassScope.findSupertype(ClassScope.java:1320)
    at org.eclipse.jdt.internal.compiler.lookup.ClassScope.connectSuperclass(ClassScope.java:952)
    at org.eclipse.jdt.internal.compiler.lookup.ClassScope.connectTypeHierarchy(ClassScope.java:1113)
    at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.connectTypeHierarchy(CompilationUnitScope.java:324)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.completeTypeBindings(LookupEnvironment.java:337)
    at org.eclipse.jdt.internal.core.hierarchy.HierarchyResolver.resolve(HierarchyResolver.java:816)
    at org.eclipse.jdt.internal.core.hierarchy.HierarchyResolver.resolve(HierarchyResolver.java:628)
    at org.eclipse.jdt.internal.core.hierarchy.HierarchyBuilder.buildSupertypes(HierarchyBuilder.java:116)
    at org.eclipse.jdt.internal.core.hierarchy.IndexBasedHierarchyBuilder.build(IndexBasedHierarchyBuilder.java:151)
    at org.eclipse.jdt.internal.core.hierarchy.TypeHierarchy.compute(TypeHierarchy.java:315)
    at org.eclipse.jdt.internal.core.hierarchy.TypeHierarchy.refresh(TypeHierarchy.java:1286)
    at org.eclipse.jdt.internal.core.CreateTypeHierarchyOperation.executeOperation(CreateTypeHierarchyOperation.java:90)
    at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:724)
    at org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation.java:790)
    at org.eclipse.jdt.internal.core.SourceType.newSupertypeHierarchy(SourceType.java:743)
    at org.eclipse.jdt.internal.core.SourceType.newSupertypeHierarchy(SourceType.java:695)
    at org.eclipse.jdt.internal.launching.JavaLaunchableTester.hasSuperclass(JavaLaunchableTester.java:467)
    at org.eclipse.jdt.internal.launching.JavaLaunchableTester.test(JavaLaunchableTester.java:611)
    at org.eclipse.core.internal.expressions.Property.test(Property.java:58)
    at org.eclipse.core.internal.expressions.TestExpression.evaluate(TestExpression.java:100)
    at org.eclipse.core.internal.expressions.CompositeExpression.evaluateOr(CompositeExpression.java:68)
    at org.eclipse.core.internal.expressions.OrExpression.evaluate(OrExpression.java:22)
    at org.eclipse.core.internal.expressions.CompositeExpression.evaluateAnd(CompositeExpression.java:53)
    at org.eclipse.core.internal.expressions.AndExpression.evaluate(AndExpression.java:31)
    at org.eclipse.core.internal.expressions.CompositeExpression.evaluateAnd(CompositeExpression.java:53)
    at org.eclipse.core.internal.expressions.IterateExpression.evaluate(IterateExpression.java:160)
    at org.eclipse.core.internal.expressions.CompositeExpression.evaluateAnd(CompositeExpression.java:53)
    at org.eclipse.core.internal.expressions.WithExpression.evaluate(WithExpression.java:75)
    at org.eclipse.core.internal.expressions.CompositeExpression.evaluateAnd(CompositeExpression.java:53)
    at org.eclipse.core.internal.expressions.EnablementExpression.evaluate(EnablementExpression.java:55)
    at org.eclipse.debug.internal.ui.launchConfigurations.LaunchShortcutExtension.evalEnablementExpression(LaunchShortcutExtension.java:281)
    at org.eclipse.debug.internal.ui.contextlaunching.LaunchingResourceManager.getShortcutsForSelection(LaunchingResourceManager.java:454)
    at org.eclipse.debug.internal.ui.contextlaunching.LaunchingResourceManager.computeLabels(LaunchingResourceManager.java:240)
    at org.eclipse.debug.internal.ui.contextlaunching.LaunchingResourceManager$1$1.run(LaunchingResourceManager.java:142)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)

Answer 1

I hit the same issue. This happens when you accidentally install AspectJ Development Tools in Eclipse Neon using the AJDT update site for Eclipse Mars http://download.eclipse.org/tools/ajdt/45/dev/update/ instead of the correct one http://download.eclipse.org/tools/ajdt/46/dev/update/ .

There was also an Eclipse bug filed for this: https://bugs.eclipse.org/bugs/show_bug.cgi?id=491030 ).

Answer 2

go to the plugins directory of your eclipse and serach using keyword "AJDT". delete all the jars that came up in search. Restart eclipse and your problem should be solved. You would need to reinstall the AJDT plugins though.