Spring Boot - main class name

Answered

Created December 18, 2019 15:17

Using version Ultimate 2019.3, if I create a new Spring Boot application (or open an existing one) which has a main class called 'Application' (and stored in 'Application.java), Intellij gets confused and thinks that the Application.java file needs to be decompiled. Run Configurations can't find the main class and there is general havoc. If I rename the class to something else, all seems to work. This was not the case in version 2019.2. I'd rather not change the name of the classes since we have dozens of microservices with this condition. Any ideas for a workaround? I'm thinking this is some kind of a bug though.

15 comments

Yaroslav Bedrov

Created December 18, 2019 19:45

Hello,

I couldn't reproduce the issue on my side with newly created project and renamed main class. Is it possible to share sample project example for investigation?

Jim Kempton

Created December 18, 2019 20:32

I'm checking the company policy about transferring files but in the meantime here is a screenshot. As you can see, it's a project with mostly just the defaults.

Jim Kempton

Created December 18, 2019 20:46

Also, here is a snippet from the Intellij log that might be useful. I'm guessing this got logged when the Application.java file was opened.

2019-12-18 15:05:33,169 [ 12447] INFO - ge.ExternalProjectsDataStorage - Load external projects data in 1 millis (read time: 0)

2019-12-18 15:05:33,492 [ 12770] INFO - tion.PackageJsonUpdateNotifier - processPackageJsonFiles []

2019-12-1815:05:37,518 [ 16796] INFO - .compiled.ClassFileStubBuilder - /Users/jim/IdeaProjects/2019.3/demo/src/main/java/com/example/demo/Application.java: /Users/jim/IdeaProjects/2019.3/demo/src/main/java/com/example/demo/Application.java: null

2019-12-1815:05:40,198 [ 19476] ERROR - .psi.impl.compiled.ClsFileImpl - file:///Users/jim/IdeaProjects/2019.3/demo/src/main/java/com/example/demo/Application.java

com.intellij.diagnostic.PluginException: stub:PsiPackageStatement:corrupted_class_files; mirror:null [Plugin: org.jetbrains.java.decompiler]

at com.intellij.psi.impl.compiled.ClsFileImpl.wrapException(ClsFileImpl.java:392)

at com.intellij.psi.impl.compiled.ClsFileImpl.getMirror(ClsFileImpl.java:360)

at com.intellij.psi.impl.compiled.ClsFileImpl.getDecompiledPsiFile(ClsFileImpl.java:401)

at com.intellij.codeInsight.folding.impl.FoldingUpdate.getFoldingsFor(FoldingUpdate.java:208)

at com.intellij.codeInsight.folding.impl.CodeFoldingManagerImpl.buildInitialFoldings(CodeFoldingManagerImpl.java:127)

at com.intellij.openapi.fileEditor.impl.text.PsiAwareTextEditorImpl.loadEditorInBackground(PsiAwareTextEditorImpl.java:50)

at com.intellij.openapi.fileEditor.impl.text.AsyncEditorLoader.lambda$null$0(AsyncEditorLoader.java:93)

at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:698)

at com.intellij.openapi.fileEditor.impl.text.AsyncEditorLoader.lambda$scheduleLoading$1(AsyncEditorLoader.java:91)

at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.insideReadAction(NonBlockingReadActionImpl.java:286)

at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.lambda$null$3(NonBlockingReadActionImpl.java:255)

at com.intellij.openapi.progress.util.ProgressIndicatorUtils.lambda$runWithWriteActionPriority$1(ProgressIndicatorUtils.java:127)

at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:163)

at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:585)

at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:531)

at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:59)

at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:150)

at com.intellij.openapi.progress.util.ProgressIndicatorUtils.runWithWriteActionPriority(ProgressIndicatorUtils.java:116)

at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.lambda$null$4(NonBlockingReadActionImpl.java:255)

at com.intellij.openapi.application.ReadAction.lambda$run$1(ReadAction.java:62)

at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:825)

at com.intellij.openapi.application.ReadAction.compute(ReadAction.java:69)

at com.intellij.openapi.application.ReadAction.run(ReadAction.java:62)

at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.lambda$transferToBgThread$5(NonBlockingReadActionImpl.java:254)

at com.intellij.util.concurrency.BoundedTaskExecutor.doRun(BoundedTaskExecutor.java:222)

at com.intellij.util.concurrency.BoundedTaskExecutor.access$200(BoundedTaskExecutor.java:30)

at com.intellij.util.concurrency.BoundedTaskExecutor$1.execute(BoundedTaskExecutor.java:201)

at com.intellij.util.ConcurrencyUtil.runUnderThreadName(ConcurrencyUtil.java:221)

at com.intellij.util.concurrency.BoundedTaskExecutor$1.run(BoundedTaskExecutor.java:190)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)

at java.lang.Thread.run(Thread.java:748)

Caused by: com.intellij.psi.impl.compiled.ClsElementImpl$InvalidMirrorException: stub:PsiPackageStatement:corrupted_class_files; mirror:null

at com.intellij.psi.impl.compiled.ClsElementImpl.setMirrorIfPresent(ClsElementImpl.java:269)

at com.intellij.psi.impl.compiled.ClsFileImpl.setFileMirror(ClsFileImpl.java:303)

at com.intellij.psi.impl.compiled.ClsFileImpl.lambda$getMirror$1(ClsFileImpl.java:355)

at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:585)

at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:531)

at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:59)

at com.intellij.openapi.progress.impl.CoreProgressManager.executeNonCancelableSection(CoreProgressManager.java:191)

at com.intellij.psi.impl.compiled.ClsFileImpl.getMirror(ClsFileImpl.java:354)

... 30 more

Yaroslav Bedrov

Created December 19, 2019 08:10

Jim,

Your project wasn't detected as Maven project, so "src/main/java" wasn't marked as sources root. There is "Non-managed pom.xml file found" message in status bar. Please click on it - "Event log" will open and there will be a link to add pom.xml as maven project.

Jim Kempton

Created December 19, 2019 12:28

Yes, good observation. This project was the minimum that I could create that exhibited the issue. After making the project a 'Managed' Maven project, all of the original issues remain. And of course all of the existing projects we have are properly set up and we've been coding in them for some time.

Yaroslav Bedrov

Created December 19, 2019 12:38

Jim,

Is it possible to share your sample project?

Jim Kempton

Created December 19, 2019 12:48

Yes, I have approval to share the demo project. Does this forum allow uploading a zip file?

Yaroslav Bedrov

Created December 19, 2019 12:57

Jim,

Please use one of the following:

JetBrains Uploads Service: https://uploads.services.jetbrains.com/ (see Uploading Large Files for JetBrains Support Team for more details).
FTP server: ftp://ftp.intellij.net/.uploads/ (anonymous login, .uploads directory has no permissions to list/download files, only for upload, so that other users will not be able to download your files).
Any file sharing service, like Dropbox, Google Drive, etc. and send us the link.

Jim Kempton

Created December 19, 2019 13:02

Great. I used the JetBrains Uploads Service. It didn't give me a link or anything to the file, but it's called demo.zip.

Thanks!

Yaroslav Bedrov

Created December 19, 2019 13:26

Could you please attach screenshot with project tree after adding project as Maven? Provided project runs fine on my side (after changing

SpringApplication.run(DemoApplication.class, args) -> SpringApplication.run(Application.class, args);

Jim Kempton

Created December 19, 2019 13:39

Here is the screenshot after setting up Maven. I was unable to open the Application.java file in the IDE to make the change you mentioned, but I could using an external editor. However, it did not fix the problem. Just to be clear though, the application does run.

Jim Kempton

Created January 07, 2020 13:22

Was the information I provided helpful in recreating the issue?

Yaroslav Bedrov

Created January 08, 2020 10:15

Jim,

Please check that "Application.java" isn't associated with "Java class" file type in "Settings/Preferences | Editor | File Types"

Jim Kempton

Created January 08, 2020 12:41

Yaroslav,

YES! That was the problem! I removed the association between "Application.java" and the "Java class" file type and the odd behavior ceased. I will give my team mates the solution immediately!

Thank you very much.

I don't know how that association was made. I'm sure that I did not enter it manually.

Yaroslav Bedrov

Created January 08, 2020 19:07

Jim,

You are welcome!

Please sign in to leave a comment.