Dash App on Heroku
http://dash-app-chsi.herokuapp.com/
Data Source and IPython Notebooks
https://github.com/Nov05/CHSI-Dash/blob/master/README.md
2019-07-03 Repo created
2019-07-04 Deploy
https://dashboard.heroku.com/apps/dash-app-chsi/deploy/github
2019-07-04 Debug
heroku logs -n 200 -a dash-app-chsi
https://devcenter.heroku.com/articles/logging#view-logs
Add server = app.server after app = dash.Dash(__name__), or it would have the follow problem.
2019-07-04T19:59:32.625915+00:00 app[api]: Deploy ff987c7a by user ***@***.com
2019-07-04T19:59:32.625915+00:00 app[api]: Release v12 created by user ***@***.com
2019-07-04T19:59:42.002629+00:00 heroku[web.1]: Starting process with command gunicorn app:server
2019-07-04T19:59:44.144995+00:00 heroku[web.1]: State changed from starting to up
2019-07-04T19:59:43.834964+00:00 app[web.1]: [2019-07-04 19:59:43 +0000] [4] [INFO] Starting gunicorn 19.9.0
2019-07-04T19:59:43.835634+00:00 app[web.1]: [2019-07-04 19:59:43 +0000] [4] [INFO] Listening at: http://0.0.0.0:46428 (4)
2019-07-04T19:59:43.835736+00:00 app[web.1]: [2019-07-04 19:59:43 +0000] [4] [INFO] Using worker: sync
2019-07-04T19:59:43.839311+00:00 app[web.1]: [2019-07-04 19:59:43 +0000] [10] [INFO] Booting worker with pid: 10
2019-07-04T19:59:43.888263+00:00 app[web.1]: [2019-07-04 19:59:43 +0000] [18] [INFO] Booting worker with pid: 18
2019-07-04T19:59:48.617367+00:00 app[web.1]: Failed to find application object 'server' in 'app'
2019-07-04T19:59:48.617526+00:00 app[web.1]: [2019-07-04 19:59:48 +0000] [10] [INFO] Worker exiting (pid: 10)
2019-07-04T19:59:48.646167+00:00 app[web.1]: Failed to find application object 'server' in 'app'
2019-07-04T19:59:48.646378+00:00 app[web.1]: [2019-07-04 19:59:48 +0000] [18] [INFO] Worker exiting (pid: 18)
2019-07-04T19:59:48.906311+00:00 app[web.1]: [2019-07-04 19:59:48 +0000] [4] [INFO] Shutting down: Master
2019-07-04T19:59:48.906408+00:00 app[web.1]: [2019-07-04 19:59:48 +0000] [4] [INFO] Reason: App failed to load.
2019-07-04T19:59:49.011878+00:00 heroku[web.1]: State changed from up to crashed
2019-07-04T19:59:48.990353+00:00 heroku[web.1]: Process exited with status 4
2019-07-04T19:59:55.000000+00:00 app[api]: Build succeeded
2019-07-04T20:02:43.769103+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=dash-app-chsi.herokuapp.com request_id=871a9cfd-c666-4416-af42-dc4cbdf4665f fwd="*.*.*.*" dyno= connect= service= status=503 bytes= protocol=http
2019-07-04T20:02:44.323653+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=dash-app-chsi.herokuapp.com request_id=f9db9ffc-ef64-474e-9bd2-976c6a938b30 fwd="*.*.*.*" dyno= connect= service= status=503 bytes= protocol=http
2019-07-04 Debug 3D Surface
# this is a plane
trace2 = go.Surface(
x=tuple(p1),
y=tuple(p2),
z=tuple(p3),
name='slice',
colorscale="Greys",
opacity=0.5,
### WARNING: This is invalid. It would not cause problem in Colab.
### But it would fail the plot when deployed on Heroku.
# showlegend=False, # invalid property
showscale=False,
)