y1chi commented on a change in pull request #14095:
URL: https://github.com/apache/beam/pull/14095#discussion_r583878382
##########
File path:
sdks/python/apache_beam/runners/portability/fn_api_runner/fn_runner_test.py
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@@ -2002,6 +2019,26 @@ def test_gbk_many_values(self):
assert_that(r, equal_to([VALUES_PER_ELEMENT * NUM_OF_ELEMENTS]))
+# TODO(robertwb): Why does pickling break when this is inlined?
+class CustomMergingWindowFn(window.WindowFn):
+ def assign(self, assign_context):
+ return [
+ window.IntervalWindow(
+ assign_context.timestamp, assign_context.timestamp + 1)
Review comment:
Could we increase `assign_context.timestamp + 1` to maybe
`assign_context.timestamp + 100`? It seems that for dataflow runner v2, in
batch the windows are inserted and fired in order, window like [2, 3) could
already been fired when element with timestamp 100 arrives, and the merging
behavior may be inconsistent with direct runner or ULR.
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