Python: AttributeError: 'NoneType' object has no attribute 'cancelled' #23290
Description
What version of gRPC and what language are you using?
Python grpcio package version 1.30.0
What operating system (Linux, Windows,...) and version?
macOS 10.14.6
What runtime / compiler are you using (e.g. python version or version of gcc)
$ venv/bin/python --version
Python 3.7.7
What did you do?
The problem happens when creating a vanilla Pulumi Python program:
$ mkdir emptypytest && cd emptypytest
$ pulumi new python
...
Successfully installed dill-0.3.2 grpcio-1.30.0 protobuf-3.12.2 pulumi-2.4.0 six-1.15.0
Finished installing dependencies
Your new project is ready to go! ✨
To perform an initial deployment, run 'pulumi up'
What did you expect to see?
$ pulumi up
Previewing update (dev):
Type Name Plan
+ pulumi:pulumi:Stack emptypytest-dev create
Resources:
+ 1 to create
What did you see instead?
$ pulumi up
Previewing update (dev):
Type Name Plan Info
+ pulumi:pulumi:Stack emptypytest-dev create 8 messages
Diagnostics:
pulumi:pulumi:Stack (emptypytest-dev):
Exception ignored in: <function _ChannelCallState.__del__ at 0x1062d8290>
Traceback (most recent call last):
File "/Users/user/Desktop/emptypytest/venv/lib/python3.7/site-packages/grpc/_channel.py", line 1126, in __del__
AttributeError: 'NoneType' object has no attribute 'cancelled'
Exception ignored in: <function _ChannelCallState.__del__ at 0x1062d8290>
Traceback (most recent call last):
File "/Users/user/Desktop/emptypytest/venv/lib/python3.7/site-packages/grpc/_channel.py", line 1126, in __del__
AttributeError: 'NoneType' object has no attribute 'cancelled'
After downgrading and pinning to grpcio 1.29.0, the error no longer happens:
$ venv/bin/pip uninstall grpcio
$ venv/bin/pip install grpcio==1.29.0
$ pulumi up
Previewing update (dev):
Type Name Plan
+ pulumi:pulumi:Stack emptypytest-dev create
Resources:
+ 1 to create