I've been getting the following error page, when visiting my app:
Application error
An error occurred in the application and your page could not be served. If you are the application owner, check your logs for details. You can do this from the Heroku CLI with the command
heroku logs --tail
However, heroku logs --tail does not return anything. If I go to the dashboard through web (https://dashboard.heroku.com/apps/app-name/logs), the logs window keeps loading but nothing is shown.
I have nothing to go on, and Heroku won't accept a ticket of a free app. Does anyone know any more steps I can take to trace the error?
Additional info:
The build logs all look fine:
BUILD SUCCESSFUL in 49s
5 actionable tasks: 5 executed
Discovering process types
Procfile declares types -> (none)
Default types for buildpack -> web
Compressing...
Done: 85.2M
Launching...
Released v3
https://app-name.herokuapp.com/ deployed to Heroku
I am creating a spring Java API, it works fine when I try to run it locally. If I try to run it through $heroku local I do get an error:
[FAIL] No Procfile and no package.json file found in Current Directory - See run --help
I had same issue. I just added system.properties to root folder of spring app and this file contained 1 line:
java.runtime.version=11