Dahs app on Heroku

Dash Python
1

Hi,

I’m having an issue with deploying dash app on heroku. I’ve followed all steps in tutorial and successfully uploaded app, but when i run it it shows an error message.
From the logs it seems that there is a problem with gunicorn, but I’m not so experienced to figure what do I need to change

Logs are below:
2018-08-26T08:04:19.607223+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/arbiter.py”, line 524, in reap_workers

2018-08-26T08:04:19.608432+00:00 app[web.1]: raise HaltServer(reason, self.WORKER_BOOT_ERROR)

2018-08-26T08:04:19.612269+00:00 app[web.1]: gunicorn.errors.HaltServer: <HaltServer ‘Worker failed to boot.’ 3>

2018-08-26T08:04:19.748489+00:00 heroku[web.1]: State changed from up to crashed

2018-08-26T08:04:19.731998+00:00 heroku[web.1]: Process exited with status 1

2018-08-26T08:05:08.432822+00:00 heroku[router]: at=error code=H10 desc=“App crashed” method=GET path="/" host=automated-cred-score.herokuapp.com request_id=b59395fd-ed63-4831-b274-425b2a368cb9 fwd=“89.216.174.2” dyno= connect= service= status=503 bytes= protocol=https

2018-08-26T08:05:09.290211+00:00 heroku[router]: at=error code=H10 desc=“App crashed” method=GET path="/favicon.ico" host=automated-cred-score.herokuapp.com request_id=8daafa32-7b4c-4c73-ad7e-a35f6ecfa23c fwd=“89.216.174.2” dyno= connect= service= status=503 bytes= protocol=https

2

Did you make sure that your Procfile has this line in : web: gunicorn <name of your app>:server ?

3

Hi, I’ve tried again and I succeeded now, somehow I’ve missed to add dash renderer into requirements file and haven’t seen it in log for the first time. Thank you for your help :slight_smile: