Use relative filepaths for deterministic coder pickling.

Author: claudevdm

sdks/python/apache_beam/coders/coder_impl.py

@@ -561,7 +561,7 @@ def encode_type(self, t, stream):
 
     if t not in _pickled_types:
       _pickled_types[t] = cloudpickle_pickler.dumps(
-          t, config=cloudpickle_pickler.NO_DYNAMIC_CLASS_TRACKING_CONFIG)
+          t, config=cloudpickle_pickler.DETERMINISTIC_CODER_CONFIG)
     stream.write(_pickled_types[t], True)
 
   def decode_type(self, stream):

sdks/python/apache_beam/internal/cloudpickle_pickler.py

@@ -39,8 +39,10 @@
 
 DEFAULT_CONFIG = cloudpickle.CloudPickleConfig(
     skip_reset_dynamic_type_state=True)
-NO_DYNAMIC_CLASS_TRACKING_CONFIG = cloudpickle.CloudPickleConfig(
-    id_generator=None, skip_reset_dynamic_type_state=True)
+DETERMINISTIC_CODER_CONFIG = cloudpickle.CloudPickleConfig(
+    id_generator=None,
+    skip_reset_dynamic_type_state=True,
+    use_relative_filepaths=True)
 
 try:
   from absl import flags