Web App does not start: ModuleNotFoundError: No module named 'main'

[MiguelElGallo]

Please provide us with the following information:

This issue is for a: (mark with an x)

- [X] bug report -> please search issues before submitting
- [ ] feature request
- [ ] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)

Minimal steps to reproduce

Deploy with all default settings, web app never starts full error:

2024-10-13T13:48:00.971279417Z    _____
2024-10-13T13:48:00.971322417Z   /  _  \ __________ _________   ____
2024-10-13T13:48:00.971328417Z  /  /_\  \\___   /  |  \_  __ \_/ __ \
2024-10-13T13:48:00.971332817Z /    |    \/    /|  |  /|  | \/\  ___/
2024-10-13T13:48:00.971336717Z \____|__  /_____ \____/ |__|    \___  >
2024-10-13T13:48:00.971341317Z         \/      \/                  \/
2024-10-13T13:48:00.971345417Z A P P   S E R V I C E   O N   L I N U X
2024-10-13T13:48:00.971349117Z
2024-10-13T13:48:00.971352817Z Documentation: http://aka.ms/webapp-linux
2024-10-13T13:48:00.971356517Z Python 3.11.8
2024-10-13T13:48:00.971360317Z Note: Any data outside '/home' is not persisted
2024-10-13T13:48:04.826217047Z Starting OpenBSD Secure Shell server: sshd.
2024-10-13T13:48:05.012929880Z WEBSITES_INCLUDE_CLOUD_CERTS is not set to true.
2024-10-13T13:48:05.168098955Z Site's appCommandLine: python3 -m gunicorn main:app
2024-10-13T13:48:05.172764878Z Launching oryx with: create-script -appPath /home/site/wwwroot -output /opt/startup/startup.sh -virtualEnvName antenv -defaultApp /opt/defaultsite -userStartupCommand 'python3 -m gunicorn main:app'
2024-10-13T13:48:05.225727543Z Could not find build manifest file at '/home/site/wwwroot/oryx-manifest.toml'
2024-10-13T13:48:05.225759643Z Could not find operation ID in manifest. Generating an operation id...
2024-10-13T13:48:05.225766943Z Build Operation ID: 9fe5aa84-0ecf-4a25-a1c7-4549b102b5e1
2024-10-13T13:48:05.557206399Z Oryx Version: 0.2.20240501.1, Commit: f83f88d3cfb8bb6d3e2765e1dcd218eb0814a095, ReleaseTagName: 20240501.1
2024-10-13T13:48:05.589276460Z Writing output script to '/opt/startup/startup.sh'
2024-10-13T13:48:05.667132649Z WARNING: Could not find virtual environment directory /home/site/wwwroot/antenv.
2024-10-13T13:48:05.673249779Z WARNING: Could not find package directory /home/site/wwwroot/__oryx_packages__.
2024-10-13T13:48:07.141512516Z [2024-10-13 13:48:07 +0000] [63] [INFO] Starting gunicorn 22.0.0
2024-10-13T13:48:07.157861197Z [2024-10-13 13:48:07 +0000] [63] [INFO] Listening at: http://0.0.0.0:8000 (63)
2024-10-13T13:48:07.164031928Z [2024-10-13 13:48:07 +0000] [63] [INFO] Using worker: sync
2024-10-13T13:48:07.196862292Z [2024-10-13 13:48:07 +0000] [71] [INFO] Booting worker with pid: 71
2024-10-13T13:48:07.232056568Z [2024-10-13 13:48:07 +0000] [71] [ERROR] Exception in worker process
2024-10-13T13:48:07.232223069Z Traceback (most recent call last):
2024-10-13T13:48:07.232230969Z   File "/opt/python/3/lib/python3.11/site-packages/gunicorn/arbiter.py", line 609, in spawn_worker
2024-10-13T13:48:07.232236269Z     worker.init_process()
2024-10-13T13:48:07.232240169Z   File "/opt/python/3/lib/python3.11/site-packages/gunicorn/workers/base.py", line 134, in init_process
2024-10-13T13:48:07.232244469Z     self.load_wsgi()
2024-10-13T13:48:07.232283769Z   File "/opt/python/3/lib/python3.11/site-packages/gunicorn/workers/base.py", line 146, in load_wsgi
2024-10-13T13:48:07.232290869Z     self.wsgi = self.app.wsgi()
2024-10-13T13:48:07.232294669Z                 ^^^^^^^^^^^^^^^
2024-10-13T13:48:07.232298569Z   File "/opt/python/3/lib/python3.11/site-packages/gunicorn/app/base.py", line 67, in wsgi
2024-10-13T13:48:07.232302569Z     self.callable = self.load()
2024-10-13T13:48:07.232306469Z                     ^^^^^^^^^^^
2024-10-13T13:48:07.232310369Z   File "/opt/python/3/lib/python3.11/site-packages/gunicorn/app/wsgiapp.py", line 58, in load
2024-10-13T13:48:07.232314369Z     return self.load_wsgiapp()
2024-10-13T13:48:07.232318170Z            ^^^^^^^^^^^^^^^^^^^
2024-10-13T13:48:07.232322170Z   File "/opt/python/3/lib/python3.11/site-packages/gunicorn/app/wsgiapp.py", line 48, in load_wsgiapp
2024-10-13T13:48:07.232326170Z     return util.import_app(self.app_uri)
2024-10-13T13:48:07.232330070Z            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2024-10-13T13:48:07.232333870Z   File "/opt/python/3/lib/python3.11/site-packages/gunicorn/util.py", line 371, in import_app
2024-10-13T13:48:07.232337970Z     mod = importlib.import_module(module)
2024-10-13T13:48:07.232359970Z           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2024-10-13T13:48:07.232366270Z   File "/opt/python/3/lib/python3.11/importlib/__init__.py", line 126, in import_module
2024-10-13T13:48:07.232370470Z     return _bootstrap._gcd_import(name[level:], package, level)
2024-10-13T13:48:07.232374370Z            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2024-10-13T13:48:07.232378270Z   File "<frozen importlib._bootstrap>", line 1204, in _gcd_import
2024-10-13T13:48:07.232383270Z   File "<frozen importlib._bootstrap>", line 1176, in _find_and_load
2024-10-13T13:48:07.232387470Z   File "<frozen importlib._bootstrap>", line 1140, in _find_and_load_unlocked
2024-10-13T13:48:07.232391570Z ModuleNotFoundError: No module named 'main'
2024-10-13T13:48:07.232395470Z [2024-10-13 13:48:07 +0000] [71] [INFO] Worker exiting (pid: 71)
2024-10-13T13:48:07.599376504Z [2024-10-13 13:48:07 +0000] [63] [ERROR] Worker (pid:71) exited with code 3
2024-10-13T13:48:07.599481604Z [2024-10-13 13:48:07 +0000] [63] [ERROR] Shutting down: Master
2024-10-13T13:48:07.599489104Z [2024-10-13 13:48:07 +0000] [63] [ERROR] Reason: Worker failed to boot.

Any log messages given by the failure

2024-10-13T13:48:07.232391570Z ModuleNotFoundError: No module named 'main'

Expected/desired behavior

Web App should start

OS and Version?

CodeSpaces

azd version?

azd version 1.10.2 (commit 84ea22048b9a1c167bc4ae2095cc7f91798ef11e)

Versions

Mention any other details that might be useful

---

Thanks! We'll be in touch soon.

[MiguelElGallo]

Seems same as #1864. Maybe @zedhaque or @pamelafox cloud have a better opinion what is happening here.
Thanks!

[jeannot-prvlimburg]

Just randomly ran into this issue as well.

ModuleNotFoundError: No module named 'main'

[jeannot-prvlimburg]

Simply retrying with azd up resolved the issue for me.

[nickmachairas]

You probably deployed from within the app directory. Try deploying again, make sure you run azd deploy from the root directory.