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Posted to issues@beam.apache.org by "Kenneth Knowles (Jira)" <ji...@apache.org> on 2021/03/18 04:19:00 UTC

[jira] [Created] (BEAM-12011) WindowFn.getOutputTime break joins, adds needless complexity

Kenneth Knowles created BEAM-12011:
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             Summary: WindowFn.getOutputTime break joins, adds needless complexity
                 Key: BEAM-12011
                 URL: https://issues.apache.org/jira/browse/BEAM-12011
             Project: Beam
          Issue Type: Bug
          Components: beam-model
            Reporter: Kenneth Knowles
            Assignee: Kenneth Knowles


See https://lists.apache.org/thread.html/r99d0efa70f83815e17a1dbfb94effd16b38176046ac8ffbfe371c895%40%3Cdev.beam.apache.org%3E

The consensus is that we really shouldn't be producing weird output, even if it causes a watermark problem we should solve it another way. It breaks CoGBK joins, and new runner authors have even missed the existence of the need to call into a UDF (hence implementing SlidingWindows the natural way instead of this strange way)



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