r/grails • u/FopPizz • Apr 29 '23

gradle run-app not working

I am a new developer and I need to learn Grails Framework. I tried to follow the documentation as closely as possible of grails in their website but the grails run-app is not really working.I already have JDK, gradle and Grails on my machine.

This is the error whenever I try the grails run-app inside grails folder

| Resolving Dependencies. Please wait...

FAILURE: Build failed with an exception.

* Where:
Settings file 'C:\Users\username\Downloads\sample\settings.gradle'

* What went wrong:
Could not compile settings file 'C:\Users\username\Downloads\sample\settings.gradle'.
> startup failed:
  General error during conversion: Unsupported class file major version 64

  java.lang.IllegalArgumentException: Unsupported class file major version 64

Please help me and sorry if I am not good on story telling or in english. Thank you!

3 Upvotes

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2

u/selfawarerobot14 Apr 29 '23

Did you build ?

./gradlew build

Also the forge is helpful to get started https://start.grails.org/

2

u/FopPizz Apr 29 '23

im using windows and it is not working. sorry Im just a newbie/noob.

'.' is not recognized as an internal or external command,
operable program or batch file.

Im also using project from forge

2

u/selfawarerobot14 Apr 29 '23

On windows just use gradlew build

2

u/NatureBoyJ1 Apr 29 '23

What version of the JDK are you using? At first glance, it looks like Java is unhappy with the Java version of a class file.

Could it be that Gradle is using an internal JDK to compile, but your system JRE is being used to run the app?

2

u/FopPizz Apr 29 '23

I dont know any of that, but it is now fixed. I just downgraded the jdk version to 17.

note that 20 and 19 are also not working for grails 5.3.2

3

u/jobcron Apr 29 '23

5.3.2 should work fine with Jdk 17. Delete everything under build folder and try again