Dash app Deployment on Heroku successful but app not loading

Dash Python
1

I’m trying to to deploy this app on heroku and it says build and deployment successful but app is not loading and error shown.

my Procfile contains : web: gunicorn app:app

log file says :
2018-01-24T08:51:16.929255+00:00 heroku[web.1]: Starting process with command gunicorn app:app
2018-01-24T08:51:19.679269+00:00 app[web.1]: [2018-01-24 08:51:19 +0000] [4] [INFO] Starting gunicorn 19.7.1
2018-01-24T08:51:19.679974+00:00 app[web.1]: [2018-01-24 08:51:19 +0000] [4] [INFO] Listening at: http://0.0.0.0:20825 (4)
2018-01-24T08:51:19.680078+00:00 app[web.1]: [2018-01-24 08:51:19 +0000] [4] [INFO] Using worker: sync
2018-01-24T08:51:19.685246+00:00 app[web.1]: [2018-01-24 08:51:19 +0000] [8] [INFO] Booting worker with pid: 8
2018-01-24T08:51:19.735783+00:00 app[web.1]: [2018-01-24 08:51:19 +0000] [9] [INFO] Booting worker with pid: 9
2018-01-24T08:51:20.654199+00:00 heroku[web.1]: State changed from starting to up
2018-01-24T08:51:21.180362+00:00 app[web.1]: Application object must be callable.
2018-01-24T08:51:21.182665+00:00 app[web.1]: [2018-01-24 08:51:21 +0000] [9] [INFO] Worker exiting (pid: 9)
2018-01-24T08:51:21.270729+00:00 app[web.1]: Application object must be callable.
2018-01-24T08:51:21.273835+00:00 app[web.1]: [2018-01-24 08:51:21 +0000] [8] [INFO] Worker exiting (pid: 8)

What i’m missing ? Please suggest me what to do :frowning:

1 Like
2

Assuming you have the line server = app.server in your app.py file as in that link, I think your Procfile should have web: gunicorn app:server

3 Likes
3

got it ! thanks @baris

4

Worked for me too.
I’d multiple page dash app with index.py as main page which iscalling other layout pages.

Changing from : web: gunicorn app
to : web: gunicorn index:server

Appreciated.

5

Everything works fine locally but not on Heroku
only title, favicon is loaded on heroku web app

image
image.png1599×867 39.9 KB

Heroku logs:
2019-07-08T04:59:10.110841+00:00 app[api]: Initial release by user ajinkya.pathak@infogen-labs.com
2019-07-08T04:59:10.304367+00:00 app[api]: Release v2 created by user ajinkya.pathak@infogen-labs.com
2019-07-08T04:59:10.304367+00:00 app[api]: Enable Logplex by user ajinkya.pathak@infogen-labs.com
2019-07-08T04:59:10.110841+00:00 app[api]: Release v1 created by user ajinkya.pathak@infogen-labs.com
2019-07-08T05:00:24.000000+00:00 app[api]: Build started by user ajinkya.pathak@infogen-labs.com
2019-07-08T05:02:18.241328+00:00 app[api]: Release v3 created by user ajinkya.pathak@infogen-labs.com
2019-07-08T05:02:18.241328+00:00 app[api]: Deploy 36a29cab by user ajinkya.pathak@infogen-labs.com
2019-07-08T05:02:18.254713+00:00 app[api]: Scaled to web@1:Free by user ajinkya.pathak@infogen-labs.com
2019-07-08T05:02:30.825103+00:00 heroku[web.1]: Starting process with command gunicorn app:server
2019-07-08T05:02:32.552220+00:00 app[web.1]: [2019-07-08 05:02:32 +0000] [4] [INFO] Starting gunicorn 19.9.0
2019-07-08T05:02:32.552715+00:00 app[web.1]: [2019-07-08 05:02:32 +0000] [4] [INFO] Listening at: http://0.0.0.0:9535 (4)
2019-07-08T05:02:32.552816+00:00 app[web.1]: [2019-07-08 05:02:32 +0000] [4] [INFO] Using worker: sync
2019-07-08T05:02:32.556529+00:00 app[web.1]: [2019-07-08 05:02:32 +0000] [10] [INFO] Booting worker with pid: 10
2019-07-08T05:02:32.559004+00:00 app[web.1]: [2019-07-08 05:02:32 +0000] [11] [INFO] Booting worker with pid: 11
2019-07-08T05:02:33.136445+00:00 heroku[web.1]: State changed from starting to up
2019-07-08T05:02:46.000000+00:00 app[api]: Build succeeded
2019-07-08T05:02:56.131143+00:00 heroku[router]: at=info method=GET path="/" host=price-estimate.herokuapp.com request_id=b683e19b-bed1-4781-a57a-deebd8d62a5d fwd=“114.143.107.170” dyno=web.1 conn
ect=1ms service=3ms status=200 bytes=882 protocol=https
2019-07-08T05:02:56.131737+00:00 app[web.1]: 10.65.121.147 - - [08/Jul/2019:05:02:56 +0000] “GET / HTTP/1.1” 200 674 “-” “Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like G
ecko) Chrome/75.0.3770.100 Safari/537.36”
2019-07-08T05:02:56.365598+00:00 app[web.1]: 10.7.184.104 - - [08/Jul/2019:05:02:56 +0000] “GET /dev HTTP/1.1” 200 674 “https://price-estimate.herokuapp.com/” “Mozilla/5.0 (Windows NT 6.1; Win64;
x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36”
2019-07-08T05:02:56.367864+00:00 app[web.1]: 10.65.121.147 - - [08/Jul/2019:05:02:56 +0000] “GET /prod HTTP/1.1” 200 674 “https://price-estimate.herokuapp.com/” “Mozilla/5.0 (Windows NT 6.1; Win64
; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36”
2019-07-08T05:02:56.366195+00:00 heroku[router]: at=info method=GET path="/dev" host=price-estimate.herokuapp.com request_id=f0eb20ed-f502-4374-9b83-cb70a1e7b780 fwd=“114.143.107.170” dyno=web.1 c
onnect=1ms service=3ms status=200 bytes=882 protocol=https
2019-07-08T05:02:56.367352+00:00 heroku[router]: at=info method=GET path="/prod" host=price-estimate.herokuapp.com request_id=5e0ca89b-8f38-4bd0-8db5-47336eeb8404 fwd=“114.143.107.170” dyno=web.1
connect=1ms service=4ms status=200 bytes=882 protocol=https
2019-07-08T05:02:56.592189+00:00 heroku[router]: at=info method=GET path="/_dash-component-suites/dash_core_components/highlight.pack.js?v=1.0.0&m=1560782792" host=price-estimate.herokuapp.com req
uest_id=4b4148af-b94c-4dd9-a295-39c2382f1cfd fwd=“114.143.107.170” dyno=web.1 connect=1ms service=4ms status=200 bytes=33175 protocol=https
2019-07-08T05:02:56.590315+00:00 app[web.1]: 10.7.184.104 - - [08/Jul/2019:05:02:56 +0000] “GET /_dash-component-suites/dash_core_components/highlight.pack.js?v=1.0.0&m=1560782792 HTTP/1.1” 200 32
974 “https://price-estimate.herokuapp.com/” “Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36”
2019-07-08T05:02:56.590600+00:00 app[web.1]: 10.65.121.147 - - [08/Jul/2019:05:02:56 +0000] “GET /_dash-component-suites/dash_bootstrap_components/_components/dash_bootstrap_components.min.js?v=0.
6.3&m=1561667553 HTTP/1.1” 200 283634 “https://price-estimate.herokuapp.com/” “Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36”
2019-07-08T05:02:56.602624+00:00 heroku[router]: at=info method=GET path="/_dash-component-suites/dash_bootstrap_components/_components/dash_bootstrap_components.min.js?v=0.6.3&m=1561667553" host=
price-estimate.herokuapp.com request_id=df5db99c-3118-4bb4-a0cf-2e953d2f8342 fwd=“114.143.107.170” dyno=web.1 connect=1ms service=15ms status=200 bytes=283836 protocol=https
2019-07-08T05:02:59.426284+00:00 app[web.1]: 10.65.121.147 - - [08/Jul/2019:05:02:59 +0000] “GET /assets/favicon.ico?m=1562562023.0 HTTP/1.1” 200 0 “https://price-estimate.herokuapp.com/” “Mozilla
/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36”
2019-07-08T05:02:59.426655+00:00 heroku[router]: at=info method=GET path="/assets/favicon.ico?m=1562562023.0" host=price-estimate.herokuapp.com request_id=f058d8c7-fe60-43e6-ad95-21719edf0de9 fwd=
“114.143.107.170” dyno=web.1 connect=1ms service=4ms status=200 bytes=30937 protocol=https
2019-07-08T05:03:30.374450+00:00 heroku[router]: at=info method=GET path="/" host=price-estimate.herokuapp.com request_id=5e76ebd4-1315-486c-ae9b-502e1549db2f fwd=“114.143.107.170” dyno=web.1 conn
ect=1ms service=3ms status=200 bytes=882 protocol=https
2019-07-08T05:03:30.375034+00:00 app[web.1]: 10.65.121.147 - - [08/Jul/2019:05:03:30 +0000] “GET / HTTP/1.1” 200 674 “-” “Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like G
ecko) Chrome/75.0.3770.100 Safari/537.36”
2019-07-08T05:03:30.586567+00:00 app[web.1]: 10.7.184.104 - - [08/Jul/2019:05:03:30 +0000] “GET /dev HTTP/1.1” 200 674 “https://price-estimate.herokuapp.com/” “Mozilla/5.0 (Windows NT 6.1; Win64;
x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36”
2019-07-08T05:03:30.586967+00:00 app[web.1]: 10.65.121.147 - - [08/Jul/2019:05:03:30 +0000] “GET /prod HTTP/1.1” 200 674 “https://price-estimate.herokuapp.com/” “Mozilla/5.0 (Windows NT 6.1; Win64
; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36”
2019-07-08T05:03:30.586791+00:00 heroku[router]: at=info method=GET path="/dev" host=price-estimate.herokuapp.com request_id=5e695c11-563f-4162-b9c1-6462d7d38f95 fwd=“114.143.107.170” dyno=web.1 c
onnect=1ms service=3ms status=200 bytes=882 protocol=https
2019-07-08T05:03:30.586509+00:00 heroku[router]: at=info method=GET path="/prod" host=price-estimate.herokuapp.com request_id=127bbb60-7cb1-46c8-8e34-040ba7ccdf75 fwd=“114.143.107.170” dyno=web.1
connect=1ms service=3ms status=200 bytes=882 protocol=https
2019-07-08T05:03:31.231567+00:00 heroku[router]: at=info method=GET path="/assets/favicon.ico?m=1562562023.0" host=price-estimate.herokuapp.com request_id=8bb43b48-7cf4-4b20-8a1f-cf44a6b891b8 fwd=
“114.143.107.170” dyno=web.1 connect=1ms service=3ms status=200 bytes=30937 protocol=https
2019-07-08T05:03:31.230638+00:00 app[web.1]: 10.7.184.104 - - [08/Jul/2019:05:03:31 +0000] “GET /assets/favicon.ico?m=1562562023.0 HTTP/1.1” 200 0 “https://price-estimate.herokuapp.com/” “Mozilla/
5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36”
2019-07-08T05:04:08.301593+00:00 heroku[router]: at=info method=GET path="/" host=price-estimate.herokuapp.com request_id=1d44a6b8-7adf-406d-86f5-ed9718584a96 fwd=“114.143.107.170” dyno=web.1 conn
ect=1ms service=3ms status=200 bytes=882 protocol=https
2019-07-08T05:04:08.300917+00:00 app[web.1]: 10.7.184.104 - - [08/Jul/2019:05:04:08 +0000] “GET / HTTP/1.1” 200 674 “-” “Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Ge
cko) Chrome/75.0.3770.100 Safari/537.36”
2019-07-08T05:04:08.518621+00:00 app[web.1]: 10.7.184.104 - - [08/Jul/2019:05:04:08 +0000] “GET /prod HTTP/1.1” 200 674 “https://price-estimate.herokuapp.com/” “Mozilla/5.0 (Windows NT 6.1; Win64;
x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36”
2019-07-08T05:04:08.520006+00:00 app[web.1]: 10.65.121.147 - - [08/Jul/2019:05:04:08 +0000] “GET /dev HTTP/1.1” 200 674 “https://price-estimate.herokuapp.com/” “Mozilla/5.0 (Windows NT 6.1; Win64;
x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36”
2019-07-08T05:04:08.519672+00:00 heroku[router]: at=info method=GET path="/dev" host=price-estimate.herokuapp.com request_id=4406b978-bfaa-4717-bf4e-0aa89e01540e fwd=“114.143.107.170” dyno=web.1 c
onnect=1ms service=3ms status=200 bytes=882 protocol=https
2019-07-08T05:04:08.518565+00:00 heroku[router]: at=info method=GET path="/prod" host=price-estimate.herokuapp.com request_id=14621ed8-5351-4f40-97e6-103428e32f00 fwd=“114.143.107.170” dyno=web.1
connect=0ms service=2ms status=200 bytes=882 protocol=https
2019-07-08T05:04:08.872280+00:00 heroku[router]: at=info method=GET path="/assets/favicon.ico?m=1562562023.0" host=price-estimate.herokuapp.com request_id=9abf6470-1a3b-49f7-8f6f-77b0452a4832 fwd=
“114.143.107.170” dyno=web.1 connect=0ms service=3ms status=200 bytes=30937 protocol=https
2019-07-08T05:04:08.872022+00:00 app[web.1]: 10.7.184.104 - - [08/Jul/2019:05:04:08 +0000] “GET /assets/favicon.ico?m=1562562023.0 HTTP/1.1” 200 0 “https://price-estimate.herokuapp.com/” “Mozilla/
5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36”
2019-07-08T05:09:18.903054+00:00 app[web.1]: 10.158.137.35 - - [08/Jul/2019:05:09:18 +0000] “GET / HTTP/1.1” 200 674 “-” “Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:67.0) Gecko/20100101 Firefox/6
7.0”
2019-07-08T05:09:19.124571+00:00 app[web.1]: 10.158.137.35 - - [08/Jul/2019:05:09:19 +0000] “GET /prod HTTP/1.1” 200 674 “https://price-estimate.herokuapp.com/” “Mozilla/5.0 (Windows NT 6.1; Win64
; x64; rv:67.0) Gecko/20100101 Firefox/67.0”
2019-07-08T05:09:18.902277+00:00 heroku[router]: at=info method=GET path="/" host=price-estimate.herokuapp.com request_id=236b92af-1e75-4875-8459-2410cc5ef5dd fwd=“114.143.107.170” dyno=web.1 conn
ect=0ms service=2ms status=200 bytes=882 protocol=https
2019-07-08T05:09:19.123860+00:00 heroku[router]: at=info method=GET path="/prod" host=price-estimate.herokuapp.com request_id=3753efe2-2586-44fc-a5d3-b21bcdd6fa0f fwd=“114.143.107.170” dyno=web.1
connect=0ms service=2ms status=200 bytes=882 protocol=https
2019-07-08T05:09:19.538983+00:00 heroku[router]: at=info method=GET path="/_dash-component-suites/dash_core_components/highlight.pack.js?v=1.0.0&m=1560782792" host=price-estimate.herokuapp.com req
uest_id=d4000f4f-3756-4517-9379-08f19bcbdc63 fwd=“114.143.107.170” dyno=web.1 connect=1ms service=5ms status=200 bytes=33175 protocol=https
2019-07-08T05:09:19.540966+00:00 heroku[router]: at=info method=GET path="/dev" host=price-estimate.herokuapp.com request_id=8ee3ead4-9f64-4235-bacd-ddff1eb4aaef fwd=“114.143.107.170” dyno=web.1 c
onnect=2ms service=2ms status=200 bytes=882 protocol=https
2019-07-08T05:09:19.536839+00:00 app[web.1]: 10.13.240.178 - - [08/Jul/2019:05:09:19 +0000] “GET /_dash-component-suites/dash_core_components/highlight.pack.js?v=1.0.0&m=1560782792 HTTP/1.1” 200 3
2974 “https://price-estimate.herokuapp.com/” “Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:67.0) Gecko/20100101 Firefox/67.0”
2019-07-08T05:09:19.540402+00:00 app[web.1]: 10.35.232.188 - - [08/Jul/2019:05:09:19 +0000] “GET /dev HTTP/1.1” 200 674 “https://price-estimate.herokuapp.com/” “Mozilla/5.0 (Windows NT 6.1; Win64;
x64; rv:67.0) Gecko/20100101 Firefox/67.0”
2019-07-08T05:09:19.542196+00:00 app[web.1]: 10.109.197.170 - - [08/Jul/2019:05:09:19 +0000] “GET /_dash-component-suites/dash_bootstrap_components/_components/dash_bootstrap_components.min.js?v=0
.6.3&m=1561667553 HTTP/1.1” 200 283634 “https://price-estimate.herokuapp.com/” “Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:67.0) Gecko/20100101 Firefox/67.0”
2019-07-08T05:09:19.551548+00:00 heroku[router]: at=info method=GET path="/_dash-component-suites/dash_bootstrap_components/_components/dash_bootstrap_components.min.js?v=0.6.3&m=1561667553" host=
price-estimate.herokuapp.com request_id=ec2860cb-4c41-4312-940f-509659fe6b88 fwd=“114.143.107.170” dyno=web.1 connect=0ms service=10ms status=200 bytes=283836 protocol=https
2019-07-08T05:09:21.036116+00:00 app[web.1]: 10.109.197.170 - - [08/Jul/2019:05:09:21 +0000] “GET /assets/favicon.ico?m=1562562023.0 HTTP/1.1” 200 0 “-” “Mozilla/5.0 (Windows NT 6.1; Win64; x64; r
v:67.0) Gecko/20100101 Firefox/67.0”
2019-07-08T05:09:21.038820+00:00 heroku[router]: at=info method=GET path="/assets/favicon.ico?m=1562562023.0" host=price-estimate.herokuapp.com request_id=ebe734bc-fc59-42ad-9576-406985da358c fwd=
“114.143.107.170” dyno=web.1 connect=0ms service=4ms status=200 bytes=30937 protocol=https

6

@aidlml Did you find a solution to this?

I am currently facing the same issues.