ValueError: too many values to unpack in application startup when deployed as a Knative service on Kubernetes

[devdattakulkarni]

We have a stac-fastapi application, which we want to run on Kubernetes as a Knative service (serverless). We have containerized our application and it runs as expected when we deploy it on K8s using a standard Kubernetes Deployment resource. But the same application image, when deployed as a Knative serverless service, encounters an exception. Here is the exception stack trace:

Defaulted container "user-container" out of: user-container, queue-proxy INFO: Started server process [1] INFO: Waiting for application startup. INFO: Application startup complete. INFO: Uvicorn running on http://0.0.0.0:8080 (Press CTRL+C to quit) too many values to unpack (expected 2) NoneType: None INFO: 192.168.81.115:0 - "GET / HTTP/1.1" 500 Internal Server Error ERROR: Exception in ASGI application Traceback (most recent call last): File "/usr/local/lib/python3.10/site-packages/uvicorn/protocols/http/h11_impl.py", line 408, in run_asgi result = await app( # type: ignore[func-returns-value] File "/usr/local/lib/python3.10/site-packages/uvicorn/middleware/proxy_headers.py", line 84, in __call__ return await self.app(scope, receive, send) File "/usr/local/lib/python3.10/site-packages/fastapi/applications.py", line 270, in __call__ await super().__call__(scope, receive, send) File "/usr/local/lib/python3.10/site-packages/starlette/applications.py", line 124, in __call__ await self.middleware_stack(scope, receive, send) File "/usr/local/lib/python3.10/site-packages/starlette/middleware/errors.py", line 184, in __call__ raise exc File "/usr/local/lib/python3.10/site-packages/starlette/middleware/errors.py", line 162, in __call__ await self.app(scope, receive, _send) File "/usr/local/lib/python3.10/site-packages/stac_fastapi/api/middleware.py", line 62, in __call__ proto, domain, port = self._get_forwarded_url_parts(scope) File "/usr/local/lib/python3.10/site-packages/stac_fastapi/api/middleware.py", line 95, in _get_forwarded_url_parts key, value = part.split("=") ValueError: too many values to unpack (expected 2)

Any suggestions/pointers towards debugging the error will be very helpful.

Tagging other Kubernetes-related issues in case others have seen this error #399 #412

[devdattakulkarni]

Here are the versions of the various libraries that I am installing via requirements.txt

stac_pydantic==2.0.*
stac-fastapi.types==2.4.3
stac-fastapi.api==2.4.3
stac-fastapi.extensions==2.4.3

[jonhealy1]

Hi @devdattakulkarni. Any progress with this?

[devdattakulkarni]

Hi @jonhealy1 We are not using Knative service now - instead going with standard Kubernetes Deployment. With that, we have not encountered this error.

[jonhealy1]

Good to hear. Thanks for the quick reply