add fs path exists checking (fix flyteorg/flyte#4470) (#2079)

Signed-off-by: Austin Liu <[email protected]>

flytekit/core/data_persistence.py

@@ -33,7 +33,7 @@
 from flytekit.configuration import DataConfig
 from flytekit.core.local_fsspec import FlyteLocalFileSystem
 from flytekit.core.utils import timeit
-from flytekit.exceptions.user import FlyteAssertion
+from flytekit.exceptions.user import FlyteAssertion, FlyteValueException
 from flytekit.interfaces.random import random
 from flytekit.loggers import logger
 
@@ -254,6 +254,8 @@ def get(self, from_path: str, to_path: str, recursive: bool = False, **kwargs):
             return to_path
         except OSError as oe:
             logger.debug(f"Error in getting {from_path} to {to_path} rec {recursive} {oe}")
+            if not file_system.exists(from_path):
+                raise FlyteValueException(from_path, "File not found")
             file_system = self.get_filesystem(get_protocol(from_path), anonymous=True)
             if file_system is not None:
                 logger.debug(f"Attempting anonymous get with {file_system}")