Brian Hulette created BEAM-13625:
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Summary: pipeline_fragment incorrectly prunes producer transform
Key: BEAM-13625
URL: https://issues.apache.org/jira/browse/BEAM-13625
Project: Beam
Issue Type: Bug
Components: sdk-py-core
Reporter: Brian Hulette
Assignee: Sam Rohde
Unfortunately I haven't been able to diagnose the exact issue here or come up
with a minimal repro. I just have some code to reproduce in
https://github.com/apache/beam/pull/16445.
That PR adds support for value_count(bins) in the DataFrame API, which for some
reason is interacting poorly with pipeline pruning in interactive Beam
(rehydrating the pipeline raises an error about a PCollection's producer
missing). The PR also adds a test to transform_test.py that replicate the
issue, as well as a temporary mitigation in pipeline_fragment.py. I think the
mitigation is effectively disabling pipeline pruning, so it likely shouldn't be
merged.
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