Can't build docs anymore, sphinx-build hangs

[chalin]

Hi all. When I now try to build the docs, sphinx-build hangs while attempting to get https://grpc.github.io/grpc/python/objects.inv:

$ ./scripts/generate_website_docs.sh         
Defaulting to user installation because normal site-packages is not writeable
Processing ./opentelemetry-api
  Preparing metadata (setup.py) ... done
Processing ./opentelemetry-semantic-conventions
  Preparing metadata (setup.py) ... done
Processing ./opentelemetry-sdk
  Preparing metadata (setup.py) ... done
Requirement already satisfied: sphinx~=3.5.4 in /Users/chalin/Library/Python/3.8/lib/python/site-packages (from -r docs-requirements.txt (line 1)) (3.5.4)
...
Requirement already satisfied: untokenize in /Users/chalin/Library/Python/3.8/lib/python/site-packages (from unify->sphinx-markdown-builder>=0.5.3->sphinx-jekyll-builder->-r docs-requirements.txt (line 5)) (0.1.1)
Building wheels for collected packages: opentelemetry-api, opentelemetry-semantic-conventions, opentelemetry-sdk
  Building wheel for opentelemetry-api (setup.py) ... done
  Created wheel for opentelemetry-api: ...
Successfully built opentelemetry-api opentelemetry-semantic-conventions opentelemetry-sdk
Installing collected packages: opentelemetry-semantic-conventions, opentelemetry-api, opentelemetry-sdk
  ...
Successfully installed opentelemetry-api-1.9.1 opentelemetry-sdk-1.9.1 opentelemetry-semantic-conventions-0.28b1
Running Sphinx v3.5.4
making output directory... done
loading intersphinx inventory from https://docs.python.org/3/objects.inv...
loading intersphinx inventory from https://opentracing-python.readthedocs.io/en/latest/objects.inv...
loading intersphinx inventory from https://aiohttp.readthedocs.io/en/stable/objects.inv...
loading intersphinx inventory from https://wrapt.readthedocs.io/en/latest/objects.inv...
loading intersphinx inventory from https://pymongo.readthedocs.io/en/stable/objects.inv...
loading intersphinx inventory from https://grpc.github.io/grpc/python/objects.inv...
[HANGS HERE]

And I have to interrupt the process:

^C^C
Interrupted!
^CError in atexit._run_exitfuncs:
Traceback (most recent call last):
  File "/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/concurrent/futures/thread.py", line 40, in _python_exit
    t.join()
  File "/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/threading.py", line 1011, in join
    self._wait_for_tstate_lock()
  File "/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/threading.py", line 1027, in _wait_for_tstate_lock
    elif lock.acquire(block, timeout):
KeyboardInterrupt

Any idea why this might be the happening? Might this be specific to gRPC (v1.44 was recently release)? I've tried with Python 3.8 and 3.9 and both exhibit the same behavior. I'm working under macOS 11.6.4.

/cc @codeboten @austinlparker

[chalin]

Hmm, rebooting my Mac seems to have resolved the hanging issue. Apologies for the noise.

[kostrykin]

Confirmed, rebooting fixes this issue on macOS. Weird.

By this issue I mean when "loading intersphinx inventory" hangs. It was a different model for me, even a different project.