ihji commented on a change in pull request #12164:
URL: https://github.com/apache/beam/pull/12164#discussion_r455446568
##########
File path: sdks/python/apache_beam/runners/dataflow/dataflow_runner.py
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@@ -864,7 +867,7 @@ def run_GroupByKey(self, transform_node, options):
windowing = transform_node.transform.get_windowing(transform_node.inputs)
step.add_property(
PropertyNames.SERIALIZED_FN,
- self.serialize_windowing_strategy(windowing))
+ self.serialize_windowing_strategy(windowing,
self._default_environment))
Review comment:
@robertwb The only problematic scenario is when `WindowingStrategy`
comes from different SDK and the proto doesn't have a value in `environment_id`
field. In that case, the host SDK will populate the field with its default
environment. But I think it shouldn't happen since it's expansion service's
responsibility to pass a semantically correct proto.
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