Spring Boot Gradle app on Heroku: Unable to access jarfile

Question

I have a spring boot gradle app which I could run successfully on my PC by doing:

heroku local

It can also deploy on heroku successfully wh

Answer 1

You don't need to modify your stage task for that.

In your gradle.build file, make sure to give a name to your built artifact like this.

jar {
    baseName = 'app'
    version = '0.0.1'
}

With that been done, and the following in Procfile, it should just run fine.

web: java -Dserver.port=$PORT $JAVA_OPTS -jar build/libs/app-0.0.1.jar

I found that if name is not explicitly defined, heroku seems to name the artifact something like build-{buildNumber}.jar and no wonder it will never find the app.jar.

Also, if not set already, the build pack needs to be set.

heroku config:set GRADLE_TASK="build"