When opening a project using Spock and IDEA 15.0.1 (but I think I may have seen this in 14.x), I sometimes see the exception at the end of this post. Reopening the project seems to help. I think it happens when project is opened and reindex is needed.
update failed for AnAction with ID=Spock.NewSpec: Please change caller according to com.intellij.openapi.project.IndexNotReadyException documentation
Indexing started at: java.lang.Throwable
at com.intellij.openapi.project.DumbServiceImpl.a(DumbServiceImpl.java:160)
at com.intellij.openapi.project.DumbServiceImpl.queueTask(DumbServiceImpl.java:85)
at com.intellij.openapi.project.impl.ProjectManagerImpl$4.run(ProjectManagerImpl.java:354)
at com.intellij.openapi.project.DumbPermissionServiceImpl.allowStartingDumbModeInside(DumbPermissionServiceImpl.java:35)
at com.intellij.openapi.project.DumbService.allowStartingDumbModeInside(DumbService.java:281)
at com.intellij.openapi.project.impl.ProjectManagerImpl.openProject(ProjectManagerImpl.java:351)
at com.intellij.openapi.project.impl.ProjectManagerImpl.loadAndOpenProject(ProjectManagerImpl.java:465)
at com.intellij.ide.impl.ProjectUtil.openProject(ProjectUtil.java:183)
at com.intellij.ide.RecentProjectsManagerImpl.doOpenProject(RecentProjectsManagerImpl.java:46)
at com.intellij.ide.RecentProjectsManagerBase.doReopenLastProject(RecentProjectsManagerBase.java:554)
at com.intellij.ide.RecentProjectsManagerBase$MyAppLifecycleListener.appStarting(RecentProjectsManagerBase.java:588)
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 com.intellij.util.messages.impl.MessageBusConnectionImpl.deliverMessage(MessageBusConnectionImpl.java:116)
at com.intellij.util.messages.impl.MessageBusImpl.doPumpMessages(MessageBusImpl.java:368)
at com.intellij.util.messages.impl.MessageBusImpl.pumpMessages(MessageBusImpl.java:355)
at com.intellij.util.messages.impl.MessageBusImpl.sendMessage(MessageBusImpl.java:334)
at com.intellij.util.messages.impl.MessageBusImpl.access$200(MessageBusImpl.java:42)
at com.intellij.util.messages.impl.MessageBusImpl$2.invoke(MessageBusImpl.java:223)
at com.sun.proxy.$Proxy44.appStarting(Unknown Source)
at com.intellij.idea.IdeaApplication$IdeStarter$2.run(IdeaApplication.java:354)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.a(LaterInvocator.java:337)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:321)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
at com.intellij.ide.IdeEventQueue.f(IdeEventQueue.java:861)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:649)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:380)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
-----------------------------
com.intellij.openapi.project.IndexNotReadyException: Please change caller according to com.intellij.openapi.project.IndexNotReadyException documentation
Indexing started at: java.lang.Throwable
at com.intellij.openapi.project.DumbServiceImpl.a(DumbServiceImpl.java:160)
at com.intellij.openapi.project.DumbServiceImpl.queueTask(DumbServiceImpl.java:85)
at com.intellij.openapi.project.impl.ProjectManagerImpl$4.run(ProjectManagerImpl.java:354)
at com.intellij.openapi.project.DumbPermissionServiceImpl.allowStartingDumbModeInside(DumbPermissionServiceImpl.java:35)
at com.intellij.openapi.project.DumbService.allowStartingDumbModeInside(DumbService.java:281)
at com.intellij.openapi.project.impl.ProjectManagerImpl.openProject(ProjectManagerImpl.java:351)
at com.intellij.openapi.project.impl.ProjectManagerImpl.loadAndOpenProject(ProjectManagerImpl.java:465)
at com.intellij.ide.impl.ProjectUtil.openProject(ProjectUtil.java:183)
at com.intellij.ide.RecentProjectsManagerImpl.doOpenProject(RecentProjectsManagerImpl.java:46)
at com.intellij.ide.RecentProjectsManagerBase.doReopenLastProject(RecentProjectsManagerBase.java:554)
at com.intellij.ide.RecentProjectsManagerBase$MyAppLifecycleListener.appStarting(RecentProjectsManagerBase.java:588)
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 com.intellij.util.messages.impl.MessageBusConnectionImpl.deliverMessage(MessageBusConnectionImpl.java:116)
at com.intellij.util.messages.impl.MessageBusImpl.doPumpMessages(MessageBusImpl.java:368)
at com.intellij.util.messages.impl.MessageBusImpl.pumpMessages(MessageBusImpl.java:355)
at com.intellij.util.messages.impl.MessageBusImpl.sendMessage(MessageBusImpl.java:334)
at com.intellij.util.messages.impl.MessageBusImpl.access$200(MessageBusImpl.java:42)
at com.intellij.util.messages.impl.MessageBusImpl$2.invoke(MessageBusImpl.java:223)
at com.sun.proxy.$Proxy44.appStarting(Unknown Source)
at com.intellij.idea.IdeaApplication$IdeStarter$2.run(IdeaApplication.java:354)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.a(LaterInvocator.java:337)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:321)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
at com.intellij.ide.IdeEventQueue.f(IdeEventQueue.java:861)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:649)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:380)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
-----------------------------
at com.intellij.util.indexing.FileBasedIndexImpl.a(FileBasedIndexImpl.java:871)
at com.intellij.util.indexing.FileBasedIndexImpl.ensureUpToDate(FileBasedIndexImpl.java:818)
at com.intellij.util.indexing.FileBasedIndexImpl.ensureUpToDate(FileBasedIndexImpl.java:801)
at com.intellij.psi.stubs.StubIndexImpl.a(StubIndexImpl.java:242)
at com.intellij.psi.stubs.StubIndexImpl.processElements(StubIndexImpl.java:223)
at com.intellij.psi.stubs.StubIndex.getElements(StubIndex.java:145)
at com.intellij.psi.stubs.StubIndex.getElements(StubIndex.java:135)
at com.intellij.psi.impl.java.stubs.index.JavaFullClassNameIndex.get(JavaFullClassNameIndex.java:48)
at com.intellij.psi.impl.file.impl.JavaFileManagerImpl.findClasses(JavaFileManagerImpl.java:78)
at com.intellij.psi.impl.PsiElementFinderImpl.findClasses(PsiElementFinderImpl.java:60)
at com.intellij.psi.impl.JavaPsiFacadeImpl.findClasses(JavaPsiFacadeImpl.java:166)
at com.cholick.idea.spock.actions.NewSpockSpecAction.findJarWithClass(NewSpockSpecAction.java:64)
at com.cholick.idea.spock.actions.NewSpockSpecAction.isAvailable(NewSpockSpecAction.java:55)
at com.intellij.ide.actions.CreateFromTemplateAction.update(CreateFromTemplateAction.java:111)
at com.cholick.idea.spock.actions.NewSpockSpecAction.update(NewSpockSpecAction.java:85)
at com.intellij.openapi.actionSystem.ex.ActionUtil.performDumbAwareUpdate(ActionUtil.java:114)
at com.intellij.openapi.actionSystem.impl.Utils.a(Utils.java:188)
at com.intellij.openapi.actionSystem.impl.Utils.updateGroupChild(Utils.java:265)
at com.intellij.ide.actions.WeighingActionGroup.getChildren(WeighingActionGroup.java:74)
at com.intellij.ide.actions.NewActionGroup.getChildren(NewActionGroup.java:31)
at com.intellij.openapi.actionSystem.impl.Utils.a(Utils.java:225)
at com.intellij.openapi.actionSystem.impl.Utils.a(Utils.java:205)
at com.intellij.openapi.actionSystem.impl.Utils.expandActionGroup(Utils.java:153)
at com.intellij.openapi.actionSystem.impl.Utils.expandActionGroup(Utils.java:164)
at com.intellij.openapi.actionSystem.impl.Utils.expandActionGroup(Utils.java:164)
at com.intellij.openapi.actionSystem.impl.Utils.expandActionGroup(Utils.java:86)
at com.intellij.openapi.actionSystem.impl.Utils.fillMenu(Utils.java:280)
at com.intellij.openapi.actionSystem.impl.ActionMenu.g(ActionMenu.java:314)
at com.intellij.openapi.actionSystem.impl.ActionMenu.access$600(ActionMenu.java:50)
at com.intellij.openapi.actionSystem.impl.ActionMenu$MenuListenerImpl.menuSelected(ActionMenu.java:268)
at javax.swing.JMenu.fireMenuSelected(JMenu.java:1037)
at javax.swing.JMenu$MenuChangeListener.stateChanged(JMenu.java:1117)
at javax.swing.DefaultButtonModel.fireStateChanged(DefaultButtonModel.java:349)
at javax.swing.DefaultButtonModel.setSelected(DefaultButtonModel.java:232)
at javax.swing.JMenu.setSelected(JMenu.java:305)
at javax.swing.JMenu.menuSelectionChanged(JMenu.java:1186)
at com.intellij.openapi.actionSystem.impl.ActionMenu.menuSelectionChanged(ActionMenu.java:240)
at javax.swing.MenuSelectionManager.setSelectedPath(MenuSelectionManager.java:125)
at javax.swing.plaf.basic.BasicMenuUI$Handler.mousePressed(BasicMenuUI.java:450)
at java.awt.Component.processMouseEvent(Component.java:6522)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6290)
at java.awt.Container.processEvent(Container.java:2234)
at java.awt.Component.dispatchEventImpl(Component.java:4881)
at java.awt.Container.dispatchEventImpl(Container.java:2292)
at java.awt.Component.dispatchEvent(Component.java:4703)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4898)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4530)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4462)
at java.awt.Container.dispatchEventImpl(Container.java:2278)
at java.awt.Window.dispatchEventImpl(Window.java:2750)
at java.awt.Component.dispatchEvent(Component.java:4703)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.awt.EventQueue$4.run(EventQueue.java:729)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at com.intellij.ide.IdeEventQueue.f(IdeEventQueue.java:861)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:645)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:380)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
When opening a project using Spock and IDEA 15.0.1 (but I think I may have seen this in 14.x), I sometimes see the exception at the end of this post. Reopening the project seems to help. I think it happens when project is opened and reindex is needed.