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I deployed python app successfully but when I open the app it is showing me:

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

here is my heroku logs:

service= status=503 bytes= protocol=https 2018-09-20T10:05:18.000000+00:00 app[api]: Build succeeded 2018-09-20T10:19:34.769300+00:00 heroku[router]: at=error code=H14 desc="No web processes running" method=GET path="/" host=demoaap.herokuapp.com request_id=1ae 01895-963b-4211-9b30-d16de606c827 fwd="182.72.121.210" dyno= connect= service= s tatus=503 bytes= protocol=https

"heroku ps"commands gives: No dynos on demoaap (demoaap is my app name)

moreover i have tried Herokuommand( " heroku ps:scale web=1" ) in order to run dynos but not working . Please help me out

Dinidu Hewage
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Lalit chouhan
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  • What's in your `Procfile`? Are you using any web frameworks like Django or Flask? – ChrisGPT was on strike Sep 20 '18 at 11:53
  • "moreover i have tried Herokuommand( " heroku ps:scale web=1" ) in order to run dynos but not working " Did you receive an error when you ran this command? If so, please share it. – jmccartie Sep 20 '18 at 16:09

2 Answers2

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If you used a Procfile in deployment, make sure it does not have an extension such as .txt. If it does, you might try:

  1. Deleting that Procfile.txt.
  2. Creating a new Procfile without the extension.
  3. Pushing the new files to Heroku.
Furkan Yavuz
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Markham Gross
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web: gunicorn --worker-class eventlet -w 1 app:app

user4920718
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