pytorch

145df306 - Avoid using default process group in ProcessGroupAgent. (#39909)

Avoid using default process group in ProcessGroupAgent. (#39909) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/39909 As described in https://github.com/pytorch/pytorch/issues/33583, ProcessGroupAgent initializes the default process group and this causes issues if the user initializes the default process group themsleves. Either the RPC initialization would fail or the user's process group initialization would fail. To avoid this, I've changed ProcessGroupAgent init to create its own ProcessGroupGloo and not use the default one at all. Closes: https://github.com/pytorch/pytorch/issues/33583 ghstack-source-id: 105953303 Test Plan: waitforbuildbot Differential Revision: D22011868 fbshipit-source-id: 7346a3fcb2821a0bc08e0bdc0625947abb5ae16f