Problem :
I’m trying to deploy a simple python bot on Heroku but I get the error couldn’t find that process type
When I try to scale the dynos. I already made a procfile and it looks like this: web: gunicorn dep:app, where “dep” is the name of my python code
What could be the reason?
Tags : python,heroku
This may happen if your procfile is misspelt, such as “procfile” or “ProcFile” etc. The file name should be “Procfile” (with a capital P).
sometimes changing the file name is not anough, because git wouldn’t spot the change. I had to delete the Procfile completely, then commit the change, than add it again with the right name, and then commit that again:
- remove your procfile
- git commit
- add a new procfile with the exact name “Procfile”
- commit again
- git push heroku master (or main – new heroku projects now uses main)
should work!
Make Sure Procfile should not have any extension like .txt otherwise this will be the error
remote: -> Discovering process types remote: Procfile declares types -> (none)
To create file without extension type following in cmd notepad Procfile. Now add web: gunicorn dep:app and save Now when you will git push heroku master the above lines will be like
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remote: -> Discovering process types remote: Procfile declares types -> web
And the error is gone when you will run
C:UsersSuper-SinghPycharmProjectsURLShortener>heroku ps:scale web=1
Scaling dynos… done, now running web at 1:Free
Ensure that the Procfile is in the root directory of your repository.
In my case I had initially kept the Procfile in a subdirectory. Moving it to the root directory solved the problem.
For people who are trying to deploy a django web app, take note that the above step may cause another issue – of heroku unable to reach till the wsgi file residing in the subdirectory.
I solved it by referring to the below thread –
How can I modify Procfile to run Gunicorn process in a non-standard folder on Heroku?
The following worked for me.
As per this Heroku help page:
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To fix:
Remove the existing buildpacks with heroku buildpacks:clear. You will need to add an empty commit and redeploy for the changes to take effect:
git commit -allow-empty -m “Adjust buildpacks on Heroku”
git push heroku master
You might check your python version. I tried to deploy my Django project so my procfile looks like this web: gunicorn blog.wsgi -log-file – and I also got the same error couldn’t find that process type. and I found that Heroku only support python-3.6.4 and python-2.7.14 while I just had python3.5. You can type:
python -V
to see what python version you are using now. if not, you can download python 3.6. I followed this How do I install Python 3.6 using apt-get?
Ubuntu 14.04 and 16.04
If you are using Ubuntu 14.04 or 16.04, you can use Felix Krull’s deadsnakes PPA at https://launchpad.net/~deadsnakes/+archive/ubuntu/ppa:
sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt-get update
sudo apt-get install python3.6
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Alternatively, you can use J Fernyhough’s PPA at https://launchpad.net/~jonathonf/+archive/ubuntu/python-3.6:
sudo add-apt-repository ppa:jonathonf/python-3.6
sudo apt-get update
sudo apt-get install python3.6
and remember to keep you python 3.5. Don’t remove it. and specify your python version in the runtime.txt file: python-3.6.4 and run:
heroku ps:scale web=1 -app [my app’s name]
and the problem solved. I hope my answer might help you.
In My case the error was solved by just creating space between web and gunicorn
Before: web:gunicorn -pythonpath app app.wsgi
After: web: gunicorn -pythonpath app app.wsgi
While it’s not Python, in my case, I had heroku/java followed by heroku/pgbouncer. In Heroku’s Settings, I switched them so heroku/pgbouncer was on top. This fixed the issue. Perhaps your buildpacks need to be ordered differently if you are using multiple.
