init_process_group changes the behavior of logging

[char256]

When running init_process_group, Python library's logging is changed, as I show in the screenshot

This happens when I was using OpenSelfSup, a library made by CUHK, and the log disappeared. Because the framework use 'hasHandlers' function to judge whether the logging level is 'WARNING' or 'INFO', this behavior makes the logger level be 'WARNING' , all 'INFO' disappeared.
I don't know this is a bug or I did things wrong,
When I changed the source code version to 1.7.1 and recompile it again, this behavior was fixed.

Enviroment

pytorch version: compiled from source, master branch
CUDA used to build Pytorch: 11.2
Python: 3.8.5
OS: ubuntu 2004
GPU: GeForce RTX 3090

Thanks so much for your attention.

cc @pietern @mrshenli @pritamdamania87 @zhaojuanmao @satgera @rohan-varma @gqchen @aazzolini @osalpekar @jiayisuse @agolynski @SciPioneer @H-Huang @mrzzd @cbalioglu

[szmigacz]

I'm seeing the same issue in my codebase. I believe that it's due to 16e5af4 which added (bare) logging calls to init_process_group.

I submitted PR with a fix: #51739