robertwb commented on code in PR #22834:
URL: https://github.com/apache/beam/pull/22834#discussion_r954117756
##########
sdks/python/apache_beam/transforms/util.py:
##########
@@ -541,15 +541,15 @@ def process(self, element):
self._running_batch_size += self._element_size_fn(element)
if self._running_batch_size >= self._target_batch_size:
with self._batch_size_estimator.record_time(self._running_batch_size):
- yield self._batch
+ yield window.GlobalWindows.windowed_value_at_end_of_window(self._batch)
Review Comment:
We could allow configuration of this with a TimestampCombiner, but I'd
consider that more a feature request than a bug fix. This seems, by default,
the safest thing to do in the global window. (Even if we preserved the latest
timestamp, there's no limit to how far back the earliest dropped timestamp
might be.)
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