The system is retrying even if the file already exists.

fetchtool/abstract_fetch.py

@@ -302,6 +302,9 @@ def download_raw_file(self, dl_file, dest, dl_md5s):
                 logging.error(msg)
             else:
                 raise EnvironmentError(msg)
+        else:
+            # The file was previously downloaded.
+            file_downloaded = True
 
         return file_downloaded