Github user uce commented on the issue:
https://github.com/apache/flink/pull/2113
Changes look good, but did you skip the `CombiningUnilateralSortMerger` on
purpose?
It's hard to tell, because the `handleLargeRecords` argument was existing
before your changes, but it was not configurable. The
`CombiningUnilateralSortMerger` always sets `handleLargeRecords` to `true`.
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