1862 Fix checkpoint read permission

monai/handlers/checkpoint_saver.py

@@ -116,7 +116,9 @@ class _DiskSaver(DiskSaver):
             """
 
             def __init__(self, dirname: str, filename: Optional[str] = None):
-                super().__init__(dirname=dirname, require_empty=False)
+                # set `atomic=False` as `atomic=True` only gives read/write permission to the user who saved the file,
+                # without group/others read permission
+                super().__init__(dirname=dirname, require_empty=False, atomic=False)
                 self.filename = filename
 
             def __call__(self, checkpoint: Dict, filename: str, metadata: Optional[Dict] = None) -> None: