Having trouble deploying streamlit apps on Heroku

[Cyrille_Mesue]

Hello,
Please I need help deploying streamlit applications to Heroku. Just a few months ago, I could deploy streanlit apps on Heroku but now, I cannot deploy even a simple app with just one st.write() statement.

Here is the output heroku logs --tail --app

2022-05-31T22:20:46.590789+00:00 app[api]: Initial release by user cyrillemesue@gmail.com
2022-05-31T22:20:46.590789+00:00 app[api]: Release v1 created by user cyrillemesue@gmail.com
2022-05-31T22:20:47.206930+00:00 app[api]: Release v2 created by user cyrillemesue@gmail.com
2022-05-31T22:20:47.206930+00:00 app[api]: Enable Logplex by user cyrillemesue@gmail.com
2022-06-01T00:27:08.000000+00:00 app[api]: Build started by user cyrillemesue@gmail.com
2022-06-01T00:28:29.963264+00:00 app[api]: Release v3 created by user cyrillemesue@gmail.com
2022-06-01T00:28:29.963264+00:00 app[api]: Deploy dd2eb9cf by user cyrillemesue@gmail.com
2022-06-01T00:28:29.985400+00:00 app[api]: Scaled to web@1:Free by user cyrillemesue@gmail.com
2022-06-01T00:28:41.269312+00:00 heroku[web.1]: Starting process with command `sh setup.sh && streamlit run bromodomain-app.py`
2022-06-01T00:28:42.667237+00:00 app[web.1]: Traceback (most recent call last):
2022-06-01T00:28:42.667255+00:00 app[web.1]: File "/app/.heroku/python/bin/streamlit", line 5, in <module>
2022-06-01T00:28:42.667378+00:00 app[web.1]: from streamlit.cli import main
2022-06-01T00:28:42.667396+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/streamlit/__init__.py", line 102, in <module>
2022-06-01T00:28:42.667566+00:00 app[web.1]: from streamlit.DeltaGenerator import DeltaGenerator as _DeltaGenerator
2022-06-01T00:28:42.667601+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/streamlit/DeltaGenerator.py", line 38, in <module>
2022-06-01T00:28:42.667815+00:00 app[web.1]: from streamlit.proto import Alert_pb2
2022-06-01T00:28:42.667834+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/streamlit/proto/Alert_pb2.py", line 35, in <module>
2022-06-01T00:28:42.667991+00:00 app[web.1]: type=None),
2022-06-01T00:28:42.668001+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/google/protobuf/descriptor.py", line 755, in __new__
2022-06-01T00:28:42.668272+00:00 app[web.1]: _message.Message._CheckCalledFromGeneratedFile()
2022-06-01T00:28:42.668294+00:00 app[web.1]: TypeError: Descriptors cannot not be created directly.
2022-06-01T00:28:42.668294+00:00 app[web.1]: If this call came from a _pb2.py file, your generated code is out of date and must be regenerated with protoc >= 3.19.0.
2022-06-01T00:28:42.668295+00:00 app[web.1]: If you cannot immediately regenerate your protos, some other possible workarounds are:
2022-06-01T00:28:42.668295+00:00 app[web.1]: 1. Downgrade the protobuf package to 3.20.x or lower.
2022-06-01T00:28:42.668295+00:00 app[web.1]: 2. Set PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION=python (but this will use pure-Python parsing and will be much slower).
2022-06-01T00:28:42.668296+00:00 app[web.1]: 
2022-06-01T00:28:42.668298+00:00 app[web.1]: More information: https://developers.google.com/protocol-buffers/docs/news/2022-05-06#python-updates
2022-06-01T00:28:42.816530+00:00 heroku[web.1]: Process exited with status 1
2022-06-01T00:28:42.934308+00:00 heroku[web.1]: State changed from starting to crashed
2022-06-01T00:28:42.937828+00:00 heroku[web.1]: State changed from crashed to starting
2022-06-01T00:28:53.184589+00:00 heroku[web.1]: Starting process with command `sh setup.sh && streamlit run bromodomain-app.py`
2022-06-01T00:28:54.267127+00:00 app[web.1]: Traceback (most recent call last):
2022-06-01T00:28:54.267164+00:00 app[web.1]: File "/app/.heroku/python/bin/streamlit", line 5, in <module>
2022-06-01T00:28:54.267261+00:00 app[web.1]: from streamlit.cli import main
2022-06-01T00:28:54.267263+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/streamlit/__init__.py", line 102, in <module>
2022-06-01T00:28:54.267407+00:00 app[web.1]: from streamlit.DeltaGenerator import DeltaGenerator as _DeltaGenerator
2022-06-01T00:28:54.267417+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/streamlit/DeltaGenerator.py", line 38, in <module>
2022-06-01T00:28:54.267517+00:00 app[web.1]: from streamlit.proto import Alert_pb2
2022-06-01T00:28:54.267519+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/streamlit/proto/Alert_pb2.py", line 35, in <module>
2022-06-01T00:28:54.267610+00:00 app[web.1]: type=None),
2022-06-01T00:28:54.267619+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/google/protobuf/descriptor.py", line 755, in __new__
2022-06-01T00:28:54.268020+00:00 app[web.1]: _message.Message._CheckCalledFromGeneratedFile()
2022-06-01T00:28:54.268033+00:00 app[web.1]: TypeError: Descriptors cannot not be created directly.
2022-06-01T00:28:54.268033+00:00 app[web.1]: If this call came from a _pb2.py file, your generated code is out of date and must be regenerated with protoc >= 3.19.0.
2022-06-01T00:28:54.268033+00:00 app[web.1]: If you cannot immediately regenerate your protos, some other possible workarounds are:
2022-06-01T00:28:54.268034+00:00 app[web.1]: 1. Downgrade the protobuf package to 3.20.x or lower.
2022-06-01T00:28:54.268034+00:00 app[web.1]: 2. Set PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION=python (but this will use pure-Python parsing and will be much slower).
2022-06-01T00:28:54.268034+00:00 app[web.1]: 
2022-06-01T00:28:54.268042+00:00 app[web.1]: More information: https://developers.google.com/protocol-buffers/docs/news/2022-05-06#python-updates
2022-06-01T00:28:54.412147+00:00 heroku[web.1]: Process exited with status 1
2022-06-01T00:28:54.489813+00:00 heroku[web.1]: State changed from starting to crashed
2022-06-01T00:29:02.000000+00:00 app[api]: Build succeeded
2022-06-01T00:29:07.818530+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=cd-discoverer.herokuapp.com request_id=bcbac3d6-064c-4b08-a683-aafcc768a431 fwd="194.27.101.106" dyno= connect= service= status=503 bytes= protocol=https
2022-06-01T00:29:08.403025+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=cd-discoverer.herokuapp.com request_id=b5a8ab3d-4a8e-4372-89f5-332608d47fb8 fwd="194.27.101.106" dyno= connect= service= status=503 bytes= protocol=https

[randyzwitch]

Hi @Cyrille_Mesue, welcome to the Streamlit community!

This is an unfortunate error, but if you specify streamlit >= 1.9.2 in your requirements and re-launch, you should hopefully have more success.

Issue with Protocol Buffers

Yes, this was both a mistake in how Streamlit was specifying its dependencies (not having an upper bound on the major version number of protobuf), and an unexpected release for the library which then got pulled down almost immediately. The best solution here is to use Streamlit>= 1.9.2, and if you are using Streamlit locally, to build a new virtual environment with a clean install so that any protobuf issues should hopefully not arise in the first place. Best, Randy

Best,
Randy

[Cyrille_Mesue]

Thank you very much. Specifying Streamlit>= 1.9.2 in the requirements.txt file fixed the problem.