[PR] [Iceberg] Split late data and create commit windows [beam]

Thu, 03 Sep 2026 16:11:53 -0700 


ahmedabu98 opened a new pull request, #40006:
URL: https://github.com/apache/beam/pull/40006

   Adds the CDC sink's windowing stage: 
   - CommitWindows groups each destination's keyed changes into event-time 
commit windows and sorts them by primary key and sequence number via SortValues 
transform
   - SplitLateData diverts every late pane to a replayable dead-letter output 
instead of letting it reach a window the committer may already have sealed. 
   
   Needs #39997 to get merged first. 
   
   Part of #39979
   
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