[jira] [Created] (BEAM-12228) Composites that return another transforms output are overridden incorrectly

["Kenneth Knowles (Jira)" <ji...@apache.org>]

Kenneth Knowles created BEAM-12228:
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             Summary: Composites that return another transforms output are overridden incorrectly
                 Key: BEAM-12228
                 URL: https://issues.apache.org/jira/browse/BEAM-12228
             Project: Beam
          Issue Type: Bug
          Components: runner-core
            Reporter: Kenneth Knowles


The TransformHierarchy considers any transform that returns another transform's output to be a "composite". A.K.A. not a primitive. A primitive produces its own output.

But a composite that returns its own output and _also_ feeds that input to an internal transform is rewired incorrectly. Because the output is replaced with the original, causing the internal PCollection to be incorrect.



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