Handle error reporting when reply file already exists (#57217)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/57217
In torch multiprocessing error handler, we try to remove the file if it already exists. Before removing, we try to log the contents of the file. Here the assumption is that the contents would be valid json.
However, in some cases, it isn't and then we end up not clearing the file.
Let's handle this error and make sure that the file is cleaned irrespective of the contents of the file.
Reviewed By: devashisht
Differential Revision: D28041470
fbshipit-source-id: da96d11b8f7091715cf0152cccd3ecc08b688eae
