Jim Hughes created FLINK-33756:
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Summary: Missing record with CUMULATE/HOP windows using an
optimization
Key: FLINK-33756
URL: https://issues.apache.org/jira/browse/FLINK-33756
Project: Flink
Issue Type: Bug
Reporter: Jim Hughes
I have seen an optimization cause a window fail to emit a record.
With the optimization `TABLE_OPTIMIZER_DISTINCT_AGG_SPLIT_ENABLED` set to true,
the configuration AggregatePhaseStrategy.TWO_PHASE set, using a HOP or CUMULATE
window with an offset, a record can be sent which causes one of the multiple
active windows to fail to emit a record.
The link code modifies the `WindowAggregateJsonITCase` to demonstrate the case.
The test `testDistinctSplitDisabled` shows the expected behavior. The test
`testDistinctSplitEnabled` tests the above configurations and shows that one
record is missing from the output.
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