# Heroku Application error

**URL:** <https://community.plotly.com/t/heroku-application-error/36573>\
**Category:** Dash Python\
**Created:** [March 23, 2020, 10:05am UTC](https://community.plotly.com/t/heroku-application-error/36573 "2020-03-23T10:05:41Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Dhanush02](https://avatars.discourse-cdn.com/v4/letter/d/aca169/32.png) [@Dhanush02](https://community.plotly.com/u/Dhanush02)\
**Post date:** [March 23, 2020, 10:05am UTC](https://community.plotly.com/t/heroku-application-error/36573/1 "2020-03-23T10:05:41Z")

</div>

Dhanush@DESKTOP-ALTCL8P MINGW64 ~/flask\_uplaod (master)  
$ heroku logs --tail  
2020-03-23T09:32:16.757940+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/util.py”, line 358, in import\_app  
2020-03-23T09:32:16.757940+00:00 app[web.1]: mod = importlib.import\_module(module)  
2020-03-23T09:32:16.757941+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/importlib/ **init**.py”, line 126, in import\_module  
2020-03-23T09:32:16.757941+00:00 app[web.1]: return \_bootstrap.\_gcd\_import(name[level:], package, level)  
2020-03-23T09:32:16.757942+00:00 app[web.1]: File “”, line 994, in \_gcd\_import  
2020-03-23T09:32:16.757943+00:00 app[web.1]: File “”, line 971, in \_find\_and\_load  
2020-03-23T09:32:16.757943+00:00 app[web.1]: File “”, line 955, in \_find\_and\_load\_unlocked  
2020-03-23T09:32:16.757943+00:00 app[web.1]: File “”, line 665, in \_load\_unlocked  
2020-03-23T09:32:16.757947+00:00 app[web.1]: File “”, line 678, in exec\_module  
2020-03-23T09:32:16.757948+00:00 app[web.1]: File “”, line 219, in \_call\_with\_frames\_removed  
2020-03-23T09:32:16.757948+00:00 app[web.1]: File “/app/app.py”, line 5, in   
2020-03-23T09:32:16.757948+00:00 app[web.1]: from denoise import \*  
2020-03-23T09:32:16.757949+00:00 app[web.1]: File “/app/denoise.py”, line 2, in   
2020-03-23T09:32:16.757949+00:00 app[web.1]: import cv2  
2020-03-23T09:32:16.757950+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/cv2/ **init**.py”, line 3, in   
2020-03-23T09:32:16.757950+00:00 app[web.1]: from .cv2 import \*  
2020-03-23T09:32:16.757956+00:00 app[web.1]: ImportError: libSM.so.6: cannot open shared object file: No such file or directory  
2020-03-23T09:32:16.759024+00:00 app[web.1]: [2020-03-23 09:32:16 +0000] [10] [INFO] Worker exiting (pid: 10)  
2020-03-23T09:32:17.466782+00:00 app[web.1]: [2020-03-23 09:32:17 +0000] [4] [INFO] Shutting down: Master  
2020-03-23T09:32:17.466895+00:00 app[web.1]: [2020-03-23 09:32:17 +0000] [4] [INFO] Reason: Worker failed to boot.  
2020-03-23T09:32:17.536357+00:00 heroku[web.1]: Process exited with status 3  
2020-03-23T09:32:17.553614+00:00 heroku[web.1]: State changed from up to crashed  
2020-03-23T09:43:38.297010+00:00 heroku[web.1]: State changed from crashed to starting  
2020-03-23T09:43:55.249608+00:00 heroku[web.1]: Starting process with command `gunicorn app:app`  
2020-03-23T09:43:58.053139+00:00 app[web.1]: [2020-03-23 09:43:58 +0000] [4] [INFO] Starting gunicorn 20.0.4  
2020-03-23T09:43:58.054202+00:00 app[web.1]: [2020-03-23 09:43:58 +0000] [4] [INFO] Listening at: [http://0.0.0.0:8934](http://0.0.0.0:8934) (4)  
2020-03-23T09:43:58.054363+00:00 app[web.1]: [2020-03-23 09:43:58 +0000] [4] [INFO] Using worker: sync  
2020-03-23T09:43:58.060435+00:00 app[web.1]: [2020-03-23 09:43:58 +0000] [10] [INFO] Booting worker with pid: 10  
2020-03-23T09:43:58.125889+00:00 app[web.1]: [2020-03-23 09:43:58 +0000] [11] [INFO] Booting worker with pid: 11  
2020-03-23T09:43:59.514783+00:00 heroku[web.1]: State changed from starting to up  
2020-03-23T09:44:00.908761+00:00 app[web.1]: Using TensorFlow backend.  
2020-03-23T09:44:01.099259+00:00 app[web.1]: Using TensorFlow backend.  
2020-03-23T09:44:16.504230+00:00 app[web.1]: [2020-03-23 09:44:16 +0000] [10] [ERROR] Exception in worker process  
2020-03-23T09:44:16.504250+00:00 app[web.1]: Traceback (most recent call last):  
2020-03-23T09:44:16.504251+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/arbiter.py”, line 583, in spawn\_worker  
2020-03-23T09:44:16.504252+00:00 app[web.1]: worker.init\_process()  
2020-03-23T09:44:16.504253+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/workers/base.py”, line 119, in init\_process  
2020-03-23T09:44:16.504253+00:00 app[web.1]: self.load\_wsgi()  
2020-03-23T09:44:16.504253+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/workers/base.py”, line 144, in load\_wsgi  
2020-03-23T09:44:16.504254+00:00 app[web.1]: self.wsgi = self.app.wsgi()  
2020-03-23T09:44:16.504255+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/base.py”, line 67, in wsgi  
2020-03-23T09:44:16.504255+00:00 app[web.1]: self.callable = self.load()  
2020-03-23T09:44:16.504255+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py”, line 49, in load  
2020-03-23T09:44:16.504256+00:00 app[web.1]: return self.load\_wsgiapp()  
2020-03-23T09:44:16.504256+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py”, line 39, in load\_wsgiapp  
2020-03-23T09:44:16.504256+00:00 app[web.1]: return util.import\_app(self.app\_uri)  
2020-03-23T09:44:16.504257+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/util.py”, line 358, in import\_app  
2020-03-23T09:44:16.504257+00:00 app[web.1]: mod = importlib.import\_module(module)  
2020-03-23T09:44:16.504257+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/importlib/ **init**.py”, line 126, in import\_module  
2020-03-23T09:44:16.504258+00:00 app[web.1]: return \_bootstrap.\_gcd\_import(name[level:], package, level)  
2020-03-23T09:44:16.504259+00:00 app[web.1]: File “”, line 994, in \_gcd\_import  
2020-03-23T09:44:16.504259+00:00 app[web.1]: File “”, line 971, in \_find\_and\_load  
2020-03-23T09:44:16.504259+00:00 app[web.1]: File “”, line 955, in \_find\_and\_load\_unlocked  
2020-03-23T09:44:16.504260+00:00 app[web.1]: File “”, line 665, in \_load\_unlocked  
2020-03-23T09:44:16.504260+00:00 app[web.1]: File “”, line 678, in exec\_module  
2020-03-23T09:44:16.504260+00:00 app[web.1]: File “”, line 219, in \_call\_with\_frames\_removed  
2020-03-23T09:44:16.504261+00:00 app[web.1]: File “/app/app.py”, line 5, in   
2020-03-23T09:44:16.504261+00:00 app[web.1]: from denoise import \*  
2020-03-23T09:44:16.504262+00:00 app[web.1]: File “/app/denoise.py”, line 2, in   
2020-03-23T09:44:16.504262+00:00 app[web.1]: import cv2  
2020-03-23T09:44:16.504263+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/cv2/ **init**.py”, line 3, in   
2020-03-23T09:44:16.504263+00:00 app[web.1]: from .cv2 import \*  
2020-03-23T09:44:16.504270+00:00 app[web.1]: ImportError: libSM.so.6: cannot open shared object file: No such file or directory  
2020-03-23T09:44:16.505218+00:00 app[web.1]: [2020-03-23 09:44:16 +0000] [10] [INFO] Worker exiting (pid: 10)  
2020-03-23T09:44:16.626926+00:00 app[web.1]: [2020-03-23 09:44:16 +0000] [11] [ERROR] Exception in worker process  
2020-03-23T09:44:16.626928+00:00 app[web.1]: Traceback (most recent call last):  
2020-03-23T09:44:16.626929+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/arbiter.py”, line 583, in spawn\_worker  
2020-03-23T09:44:16.626929+00:00 app[web.1]: worker.init\_process()  
2020-03-23T09:44:16.626930+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/workers/base.py”, line 119, in init\_process  
2020-03-23T09:44:16.626930+00:00 app[web.1]: self.load\_wsgi()  
2020-03-23T09:44:16.626931+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/workers/base.py”, line 144, in load\_wsgi  
2020-03-23T09:44:16.626931+00:00 app[web.1]: self.wsgi = self.app.wsgi()  
2020-03-23T09:44:16.626932+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/base.py”, line 67, in wsgi  
2020-03-23T09:44:16.626932+00:00 app[web.1]: self.callable = self.load()  
2020-03-23T09:44:16.626954+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py”, line 49, in load  
2020-03-23T09:44:16.626955+00:00 app[web.1]: return self.load\_wsgiapp()  
2020-03-23T09:44:16.626955+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py”, line 39, in load\_wsgiapp  
2020-03-23T09:44:16.626956+00:00 app[web.1]: return util.import\_app(self.app\_uri)  
2020-03-23T09:44:16.626956+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/util.py”, line 358, in import\_app  
2020-03-23T09:44:16.626956+00:00 app[web.1]: mod = importlib.import\_module(module)  
2020-03-23T09:44:16.626957+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/importlib/ **init**.py”, line 126, in import\_module  
2020-03-23T09:44:16.626958+00:00 app[web.1]: return \_bootstrap.\_gcd\_import(name[level:], package, level)  
2020-03-23T09:44:16.626958+00:00 app[web.1]: File “”, line 994, in \_gcd\_import  
2020-03-23T09:44:16.626958+00:00 app[web.1]: File “”, line 971, in \_find\_and\_load  
2020-03-23T09:44:16.626959+00:00 app[web.1]: File “”, line 955, in \_find\_and\_load\_unlocked  
2020-03-23T09:44:16.626959+00:00 app[web.1]: File “”, line 665, in \_load\_unlocked  
2020-03-23T09:44:16.626960+00:00 app[web.1]: File “”, line 678, in exec\_module  
2020-03-23T09:44:16.626960+00:00 app[web.1]: File “”, line 219, in \_call\_with\_frames\_removed  
2020-03-23T09:44:16.626960+00:00 app[web.1]: File “/app/app.py”, line 5, in   
2020-03-23T09:44:16.626961+00:00 app[web.1]: from denoise import \*  
2020-03-23T09:44:16.626961+00:00 app[web.1]: File “/app/denoise.py”, line 2, in   
2020-03-23T09:44:16.626962+00:00 app[web.1]: import cv2  
2020-03-23T09:44:16.626963+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/cv2/ **init**.py”, line 3, in   
2020-03-23T09:44:16.626963+00:00 app[web.1]: from .cv2 import \*  
2020-03-23T09:44:16.626969+00:00 app[web.1]: ImportError: libSM.so.6: cannot open shared object file: No such file or directory  
2020-03-23T09:44:16.628219+00:00 app[web.1]: [2020-03-23 09:44:16 +0000] [11] [INFO] Worker exiting (pid: 11)  
2020-03-23T09:44:17.311890+00:00 app[web.1]: [2020-03-23 09:44:17 +0000] [4] [INFO] Shutting down: Master  
2020-03-23T09:44:17.312044+00:00 app[web.1]: [2020-03-23 09:44:17 +0000] [4] [INFO] Reason: Worker failed to boot.  
2020-03-23T09:44:17.416192+00:00 heroku[web.1]: State changed from up to crashed  
2020-03-23T09:44:17.398295+00:00 heroku[web.1]: Process exited with status 3  
2020-03-23T09:56:38.701816+00:00 heroku[web.1]: State changed from crashed to starting  
2020-03-23T09:56:54.479981+00:00 heroku[web.1]: Starting process with command `gunicorn app:app`  
2020-03-23T09:56:56.680645+00:00 heroku[web.1]: State changed from starting to up  
2020-03-23T09:56:56.467149+00:00 app[web.1]: [2020-03-23 09:56:56 +0000] [4] [INFO] Starting gunicorn 20.0.4  
2020-03-23T09:56:56.467825+00:00 app[web.1]: [2020-03-23 09:56:56 +0000] [4] [INFO] Listening at: [http://0.0.0.0:37834](http://0.0.0.0:37834) (4)  
2020-03-23T09:56:56.467929+00:00 app[web.1]: [2020-03-23 09:56:56 +0000] [4] [INFO] Using worker: sync  
2020-03-23T09:56:56.471771+00:00 app[web.1]: [2020-03-23 09:56:56 +0000] [10] [INFO] Booting worker with pid: 10  
2020-03-23T09:56:56.541608+00:00 app[web.1]: [2020-03-23 09:56:56 +0000] [11] [INFO] Booting worker with pid: 11  
2020-03-23T09:56:58.103607+00:00 app[web.1]: Using TensorFlow backend.  
2020-03-23T09:56:58.108196+00:00 app[web.1]: Using TensorFlow backend.  
2020-03-23T09:57:12.602519+00:00 app[web.1]: [2020-03-23 09:57:12 +0000] [11] [ERROR] Exception in worker process  
2020-03-23T09:57:12.602534+00:00 app[web.1]: Traceback (most recent call last):  
2020-03-23T09:57:12.602536+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/arbiter.py”, line 583, in spawn\_worker  
2020-03-23T09:57:12.602536+00:00 app[web.1]: worker.init\_process()  
2020-03-23T09:57:12.602537+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/workers/base.py”, line 119, in init\_process  
2020-03-23T09:57:12.602537+00:00 app[web.1]: self.load\_wsgi()  
2020-03-23T09:57:12.602538+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/workers/base.py”, line 144, in load\_wsgi  
2020-03-23T09:57:12.602538+00:00 app[web.1]: self.wsgi = self.app.wsgi()  
2020-03-23T09:57:12.602539+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/base.py”, line 67, in wsgi  
2020-03-23T09:57:12.602539+00:00 app[web.1]: self.callable = self.load()  
2020-03-23T09:57:12.602539+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py”, line 49, in load  
2020-03-23T09:57:12.602540+00:00 app[web.1]: return self.load\_wsgiapp()  
2020-03-23T09:57:12.602540+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py”, line 39, in load\_wsgiapp  
2020-03-23T09:57:12.602541+00:00 app[web.1]: return util.import\_app(self.app\_uri)  
2020-03-23T09:57:12.602541+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/util.py”, line 358, in import\_app  
2020-03-23T09:57:12.602542+00:00 app[web.1]: mod = importlib.import\_module(module)  
2020-03-23T09:57:12.602542+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/importlib/ **init**.py”, line 126, in import\_module  
2020-03-23T09:57:12.602543+00:00 app[web.1]: return \_bootstrap.\_gcd\_import(name[level:], package, level)  
2020-03-23T09:57:12.602543+00:00 app[web.1]: File “”, line 994, in \_gcd\_import  
2020-03-23T09:57:12.602544+00:00 app[web.1]: File “”, line 971, in \_find\_and\_load  
2020-03-23T09:57:12.602544+00:00 app[web.1]: File “”, line 955, in \_find\_and\_load\_unlocked  
2020-03-23T09:57:12.602545+00:00 app[web.1]: File “”, line 665, in \_load\_unlocked  
2020-03-23T09:57:12.602545+00:00 app[web.1]: File “”, line 678, in exec\_module  
2020-03-23T09:57:12.602545+00:00 app[web.1]: File “”, line 219, in \_call\_with\_frames\_removed  
2020-03-23T09:57:12.602546+00:00 app[web.1]: File “/app/app.py”, line 5, in   
2020-03-23T09:57:12.602546+00:00 app[web.1]: from denoise import \*  
2020-03-23T09:57:12.602547+00:00 app[web.1]: File “/app/denoise.py”, line 2, in   
2020-03-23T09:57:12.602547+00:00 app[web.1]: import cv2  
2020-03-23T09:57:12.602548+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/cv2/ **init**.py”, line 3, in   
2020-03-23T09:57:12.602548+00:00 app[web.1]: from .cv2 import \*  
2020-03-23T09:57:12.602571+00:00 app[web.1]: ImportError: libSM.so.6: cannot open shared object file: No such file or directory  
2020-03-23T09:57:12.603829+00:00 app[web.1]: [2020-03-23 09:57:12 +0000] [11] [INFO] Worker exiting (pid: 11)  
2020-03-23T09:57:12.607156+00:00 app[web.1]: [2020-03-23 09:57:12 +0000] [10] [ERROR] Exception in worker process  
2020-03-23T09:57:12.607158+00:00 app[web.1]: Traceback (most recent call last):  
2020-03-23T09:57:12.607158+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/arbiter.py”, line 583, in spawn\_worker  
2020-03-23T09:57:12.607159+00:00 app[web.1]: worker.init\_process()  
2020-03-23T09:57:12.607159+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/workers/base.py”, line 119, in init\_process  
2020-03-23T09:57:12.607160+00:00 app[web.1]: self.load\_wsgi()  
2020-03-23T09:57:12.607160+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/workers/base.py”, line 144, in load\_wsgi  
2020-03-23T09:57:12.607161+00:00 app[web.1]: self.wsgi = self.app.wsgi()  
2020-03-23T09:57:12.607161+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/base.py”, line 67, in wsgi  
2020-03-23T09:57:12.607162+00:00 app[web.1]: self.callable = self.load()  
2020-03-23T09:57:12.607162+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py”, line 49, in load  
2020-03-23T09:57:12.607163+00:00 app[web.1]: return self.load\_wsgiapp()  
2020-03-23T09:57:12.607163+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py”, line 39, in load\_wsgiapp  
2020-03-23T09:57:12.607164+00:00 app[web.1]: return util.import\_app(self.app\_uri)  
2020-03-23T09:57:12.607164+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/gunicorn/util.py”, line 358, in import\_app  
2020-03-23T09:57:12.607164+00:00 app[web.1]: mod = importlib.import\_module(module)  
2020-03-23T09:57:12.607165+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/importlib/ **init**.py”, line 126, in import\_module  
2020-03-23T09:57:12.607165+00:00 app[web.1]: return \_bootstrap.\_gcd\_import(name[level:], package, level)  
2020-03-23T09:57:12.607165+00:00 app[web.1]: File “”, line 994, in \_gcd\_import  
2020-03-23T09:57:12.607166+00:00 app[web.1]: File “”, line 971, in \_find\_and\_load  
2020-03-23T09:57:12.607166+00:00 app[web.1]: File “”, line 955, in \_find\_and\_load\_unlocked  
2020-03-23T09:57:12.607167+00:00 app[web.1]: File “”, line 665, in \_load\_unlocked  
2020-03-23T09:57:12.607167+00:00 app[web.1]: File “”, line 678, in exec\_module  
2020-03-23T09:57:12.607167+00:00 app[web.1]: File “”, line 219, in \_call\_with\_frames\_removed  
2020-03-23T09:57:12.607168+00:00 app[web.1]: File “/app/app.py”, line 5, in   
2020-03-23T09:57:12.607168+00:00 app[web.1]: from denoise import \*  
2020-03-23T09:57:12.607169+00:00 app[web.1]: File “/app/denoise.py”, line 2, in   
2020-03-23T09:57:12.607169+00:00 app[web.1]: import cv2  
2020-03-23T09:57:12.607170+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.6/site-packages/cv2/ **init**.py”, line 3, in   
2020-03-23T09:57:12.607170+00:00 app[web.1]: from .cv2 import \*  
2020-03-23T09:57:12.607171+00:00 app[web.1]: ImportError: libSM.so.6: cannot open shared object file: No such file or directory  
2020-03-23T09:57:12.608198+00:00 app[web.1]: [2020-03-23 09:57:12 +0000] [10] [INFO] Worker exiting (pid: 10)  
2020-03-23T09:57:43.373874+00:00 app[web.1]: [2020-03-23 09:57:43 +0000] [4] [INFO] Shutting down: Master  
2020-03-23T09:57:43.374039+00:00 app[web.1]: [2020-03-23 09:57:43 +0000] [4] [INFO] Reason: Worker failed to boot.  
2020-03-23T09:57:43.473522+00:00 heroku[web.1]: State changed from up to crashed  
2020-03-23T09:57:43.453258+00:00 heroku[web.1]: Process exited with status 3