InteliJ infinite "scanning files to index"

[ardelaet]

Steps to reproduce

I recently started a new Spring Boot project using JDK 21, Maven and Vaadin. As a basis for this project, I used a Vaadin starter project for version 14 (version 14.10.9 to be exact).

I use IntelliJ 2023 as my IDE, running on Windows 11.
I have zScaler installed and active.

Actual behavior

When I open & run the project without the Vaadin Designer plugin enabled, it works as expected.

When I open the project with the Vaadin Designer plugin enabled, IntelliJ gets stuck on "scanning files to index". An animated loading bar appear in the bottom status bar as well as one in the middle of my screen (see image below).

I let this run for several hours, to no avail. When I press the 'cancel' button I get prompted to download & install a bunch of npm packages. However, when double checking these packages are already installed. This behavior is probably caused by the incomplete indexing. Other than this prompt, the project opens nicely after pressing that 'cancel' button. Both using the Vaadin Designer plugin's features and running the program behaves as expected.

Below you can find the last few lines of the idea.log before the freeze happens (this does not change until I click 'cancel'):

2023-10-31 01:07:46,904 [  20845]   INFO - #c.i.w.i.i.EntitiesOrphanageImpl - Update orphanage. 0 modules added
2023-10-31 01:07:46,905 [  20846]   INFO - #c.i.w.i.i.WorkspaceModelImpl - Project model updated to version 10 in 7 ms: Root model commit
2023-10-31 01:07:46,922 [  20863] SEVERE - #c.i.o.a.i.ApplicationImpl - AWT events are not allowed inside write action: java.awt.event.InvocationEvent[INVOCATION_DEFAULT,runnable=javax.swing.RepaintManager$ProcessingRunnable@2f61d502,notifier=null,catchExceptions=false,when=1698710866849] on sun.awt.windows.WToolkit@2ab4392b
java.lang.Throwable: AWT events are not allowed inside write action: java.awt.event.InvocationEvent[INVOCATION_DEFAULT,runnable=javax.swing.RepaintManager$ProcessingRunnable@2f61d502,notifier=null,catchExceptions=false,when=1698710866849] on sun.awt.windows.WToolkit@2ab4392b
    at com.intellij.openapi.diagnostic.Logger.error(Logger.java:370)
    at com.intellij.openapi.application.impl.ApplicationImpl.lambda$postInit$0(ApplicationImpl.java:182)
    at com.intellij.ide.IdeEventQueue.runCustomProcessors(IdeEventQueue.kt:424)
    at com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$7(IdeEventQueue.kt:384)
    at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.kt:400)
    at com.intellij.openapi.progress.impl.PlatformTaskSupportKt.pumpEventsForHierarchy(PlatformTaskSupport.kt:379)
    at com.intellij.openapi.progress.impl.PlatformTaskSupportKt.access$pumpEventsForHierarchy(PlatformTaskSupport.kt:1)
    at com.intellij.openapi.progress.impl.PlatformTaskSupport$runWithModalProgressBlockingInternal$2.invoke(PlatformTaskSupport.kt:157)
    at com.intellij.openapi.progress.impl.PlatformTaskSupport$runWithModalProgressBlockingInternal$2.invoke(PlatformTaskSupport.kt:135)
    at com.intellij.openapi.application.impl.ModalityKt.inModalContext(modality.kt:12)
    at com.intellij.openapi.progress.impl.PlatformTaskSupport.runWithModalProgressBlockingInternal(PlatformTaskSupport.kt:135)
    at com.intellij.openapi.progress.impl.PlatformTaskSupport.access$runWithModalProgressBlockingInternal(PlatformTaskSupport.kt:41)
    at com.intellij.openapi.progress.impl.PlatformTaskSupport$runWithModalProgressBlockingInternal$1.invoke(PlatformTaskSupport.kt:123)
    at com.intellij.openapi.progress.impl.PlatformTaskSupport$runWithModalProgressBlockingInternal$1.invoke(PlatformTaskSupport.kt:119)
    at com.intellij.openapi.progress.ContextKt.prepareThreadContext(context.kt:94)
    at com.intellij.openapi.progress.impl.PlatformTaskSupport.runWithModalProgressBlockingInternal(PlatformTaskSupport.kt:119)
    at com.intellij.openapi.progress.TasksKt.runWithModalProgressBlocking(tasks.kt:167)
    at com.intellij.ide.impl.ProjectUtilKt.runUnderModalProgressIfIsEdt(ProjectUtil.kt:710)
    at com.intellij.openapi.project.impl.ProjectImpl.save(ProjectImpl.kt:364)
    at com.vaadin.designer2.intellij.editor.flow.NodeServerModuleComponent.lambda$indexNodeModules$1(NodeServerModuleComponent.java:98)
    at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:992)
    at com.vaadin.designer2.intellij.editor.flow.NodeServerModuleComponent.indexNodeModules(NodeServerModuleComponent.java:96)
    at com.vaadin.designer2.intellij.editor.flow.NodeServerModuleComponent.lambda$indexNodeLater$0(NodeServerModuleComponent.java:70)
    at com.intellij.openapi.application.TransactionGuardImpl.runWithWritingAllowed(TransactionGuardImpl.java:208)
    at com.intellij.openapi.application.TransactionGuardImpl.access$100(TransactionGuardImpl.java:21)
    at com.intellij.openapi.application.TransactionGuardImpl$1.run(TransactionGuardImpl.java:190)
    at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:861)
    at com.intellij.openapi.application.impl.ApplicationImpl$4.run(ApplicationImpl.java:478)
    at com.intellij.openapi.application.impl.FlushQueue.doRun(FlushQueue.java:79)
    at com.intellij.openapi.application.impl.FlushQueue.runNextEvent(FlushQueue.java:121)
    at com.intellij.openapi.application.impl.FlushQueue.flushNow(FlushQueue.java:41)
    at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:318)
    at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:792)
    at java.desktop/java.awt.EventQueue$3.run(EventQueue.java:739)
    at java.desktop/java.awt.EventQueue$3.run(EventQueue.java:733)
    at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
    at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
    at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:761)
    at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.kt:685)
    at com.intellij.ide.IdeEventQueue._dispatchEvent$lambda$10(IdeEventQueue.kt:589)
    at com.intellij.openapi.application.impl.ApplicationImpl.runWithoutImplicitRead(ApplicationImpl.java:1485)
    at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.kt:589)
    at com.intellij.ide.IdeEventQueue.access$_dispatchEvent(IdeEventQueue.kt:67)
    at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1$1.compute(IdeEventQueue.kt:369)
    at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1$1.compute(IdeEventQueue.kt:368)
    at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:787)
    at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1.invoke(IdeEventQueue.kt:368)
    at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1.invoke(IdeEventQueue.kt:363)
    at com.intellij.ide.IdeEventQueueKt.performActivity$lambda$1(IdeEventQueue.kt:992)
    at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:105)
    at com.intellij.ide.IdeEventQueueKt.performActivity(IdeEventQueue.kt:992)
    at com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$7(IdeEventQueue.kt:363)
    at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:861)
    at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.kt:405)
    at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:207)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
    at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:92)
2023-10-31 01:07:46,926 [  20867] SEVERE - #c.i.o.a.i.ApplicationImpl - IntelliJ IDEA 2023.2.2  Build #IU-232.9921.47
2023-10-31 01:07:46,926 [  20867] SEVERE - #c.i.o.a.i.ApplicationImpl - JDK: 17.0.8; VM: OpenJDK 64-Bit Server VM; Vendor: JetBrains s.r.o.
2023-10-31 01:07:46,927 [  20868] SEVERE - #c.i.o.a.i.ApplicationImpl - OS: Windows 11
2023-10-31 01:07:46,927 [  20868] SEVERE - #c.i.o.a.i.ApplicationImpl - Plugin to blame: Vaadin Designer version: 4.6.23
2023-10-31 01:07:49,711 [  23652]   INFO - #o.j.k.i.s.r.KotlinCompilerReferenceIndexStorage - KCRI storage is closed (didn't exist)
2023-10-31 01:07:49,712 [  23653]   INFO - #c.i.c.b.CompilerReferenceServiceBase - backward reference index reader is closed (didn't exist)
2023-10-31 01:07:53,230 [  27171]   INFO - #c.i.c.b.IsUpToDateCheckStartupActivity - isUpToDate = true
2023-10-31 01:08:30,703 [  64644]   INFO - #c.i.u.g.s.GistStorageImpl - Cleaning old huge-gists dirs from [C:\Users\a98016721\AppData\Local\JetBrains\IntelliJIdea2023.2\caches\huge-gists] ...

Below you can find the first few lines of the idea.log after I press 'cancel':

2023-10-31 01:13:32,859 [ 366800]   INFO - #c.i.c.ComponentStoreImpl - Saving Module: 'CobotConnect'designer2.settings took 345895 ms
2023-10-31 01:13:32,946 [ 366887]   INFO - #o.j.k.i.s.r.KotlinCompilerReferenceIndexService - initialized
2023-10-31 01:13:32,952 [ 366893]   INFO - #c.i.l.j.l.t.TypeScriptExternalDefinitionsService - Type definition roots changed: project [CobotConnect], added/updated [], removed: [@types/lodash, @types/express]
2023-10-31 01:13:32,955 [ 366896]   WARN - #o.j.k.i.s.r.KotlinCompilerReferenceIndexStorage - kotlin-data-container is not found
2023-10-31 01:13:32,957 [ 366898]   INFO - #c.i.c.b.CompilerReferenceServiceBase - initialized

Expected behavior

IntelliJ not getting stuck at "scanning files to index".

[harrbca]

Can confirm, I am having the exact same issue. I sent my logs to IntelliJ support and they identified this plugin as being the cause and recommended I disable it to see if it corrected my loading issue. It did.

[harrbca]

I should note, this has been happening to me for several months. I finally got tired of hitting the cancel button and decided to email IntellJ support about it figuring it was some weird issue with the IDE.

[josegulisano]

I am experiencing the same issue. This is a recurring problem going back to 2020.

[mshabarov]

Thanks @ardelaet and all who commented on this issue! We'll take a look as soon as we can.

[szolo]

Fixed in Vaadin Designer 4.6.24.