OTEL_PROPAGATORS does not support "none" value #4143
Description
Describe your environment
OS: Linux/amd64
Python version: Python 3.12
SDK version: I installed following libs using pip, so I assume the latest version (opentelemetry-exporter-otlp opentelemetry-instrumentation-requests opentelemetry-instrumentation-flask)
API version: I installed following libs using pip, so I assume the latest version (opentelemetry-exporter-otlp opentelemetry-instrumentation-requests opentelemetry-instrumentation-flask)
What happened?
It seems that I can't disable context propagation in Python by setting the OTEL_PROPAGATORS ENV variable to none as mentioned here.
When trying to do so, I get the following error:
{ "message": "Uncaught exception", "traceback": "Traceback (most recent call last): File \"/usr/local/lib/python3.12/site-packages/opentelemetry/propagate/__init__.py\", line 139, in <module> next( # type: ignore StopIteration During handling of the above exception, another exception occurred: Traceback (most recent call last): File \"/cert-issuer/wsgi.py\", line 1, in <module> from app import app File \"/cert-issuer/app.py\", line 24, in <module> setup_instrument(app) File \"/cert-issuer/accredible/setup_instrument.py\", line 24, in setup_instrument from opentelemetry.instrumentation.flask import FlaskInstrumentor File \"/usr/local/lib/python3.12/site-packages/opentelemetry/instrumentation/flask/__init__.py\", line 251, in <module> import opentelemetry.instrumentation.wsgi as otel_wsgi File \"/usr/local/lib/python3.12/site-packages/opentelemetry/instrumentation/wsgi/__init__.py\", line 216, in <module> from opentelemetry.instrumentation._semconv import ( File \"/usr/local/lib/python3.12/site-packages/opentelemetry/instrumentation/_semconv.py\", line 19, in <module> from opentelemetry.instrumentation.utils import http_status_to_status_code File \"/usr/local/lib/python3.12/site-packages/opentelemetry/instrumentation/utils.py\", line 32, in <module> from opentelemetry.propagate import extract File \"/usr/local/lib/python3.12/site-packages/opentelemetry/propagate/__init__.py\", line 149, in <module> raise ValueError( ValueError: Propagator none not found. It is either misspelled or not installed." } It seems that error happens at this line and it's because we are missing the none propagator definition here in opentelemetry-api/pyproject.toml. (I am not a python expert, so my assumption can be wrong)
Steps to Reproduce
- set
OTEL_PROPAGATORS=none - run the app
Expected Result
No errors are expected, and automatic propagation is disabled.
Actual Result
Error that the none propagator is not defined.
Additional context
I am not sure if setting the OTEL_PROPAGATORS="" will be valid, but according to the documentation, none should be a valid value.
Would you like to implement a fix?
None