[Bug] OpenTelemetry _load_runtime_context() returning an error and resulting in Worker failed to load function error

[TheDataDexter]

• Package Name: azure-monitor-opentelemetry
• Package Version: 1.6.10
• Operating System: Linux
• Python Version: 3.11

Describe the bug
After deploying our Azure Function App, the runtime fails to load the function, and the following error appears in the logs:

Worker failed to load function: 'function_name' with functionId: '00000000-0000-0000-00000000000000000'.

from opentelemetry import trace
File "/home/site/wwwroot/.python_packages/lib/site-packages/opentelemetry/trace/__init__.py", line 85, in <module>
  from opentelemetry import context as context_api
File "/home/site/wwwroot/.python_packages/lib/site-packages/opentelemetry/context/__init__.py", line 70, in <module>
  _RUNTIME_CONTEXT = _load_runtime_context()
File "/home/site/wwwroot/.python_packages/lib/site-packages/opentelemetry/context/__init__.py", line 60, in _load_runtime_context
  return next(  # type: ignore
StopIteration

We have not changed the requirements.txt recently. This error appeared as of last week (Thursday for our team).

To Reproduce
Steps to reproduce the behavior:

1. Deploy a Python Azure Function App using the following dependencies:
   pgsql
   Kopiëren
   Bewerken
   azure-functions
   aiohttp
   azure-identity
   lxml
   cryptography==43.0.3
   opentelemetry-api
   opentelemetry-sdk
   azure-monitor-opentelemetry
   opentelemetry-instrumentation-requests
   opentelemetry-instrumentation-aiohttp-client
2. Use Python version 3.11 and Azure Function runtime version 1.1039.500.0.
3. Observe the failure in Application Insights or log stream.

Expected behavior
The function app should start without any runtime errors and execute the functions normally.

Screenshots
N/A

Additional context
We have tried to downgrade the package and found the same error. We suspect a compatibility issue or a breaking change in the latest azure-monitor-opentelemetry or its transitive dependencies (especially opentelemetry.context).

[github-actions]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @gulopesd @Haiying-MSFT @jairmyree @joshfree @KarishmaGhiya @KevinBlasko @kurtzeborn @pvaneck @scottaddie @srnagar @ToddKingMSFT.

[catalinaperalta]

Thanks for reaching out @TheDataDexter, I'm looping in the right folks to help take a look at this.

[DedrickBarkley]

hey, I had a similar issue. I reverted back to the older version (azure-functions-durable==1.2.10) in my requiremnts.txt file and it solved the issue. There is problem with the opentelemetry module that Microsoft is currently trying to fix.

I hope this helps!