apache / apache/beam

DoFn.XxxParam does not work for Map and FlatMap

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bug core P3 python
Dominant language
Java
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Description

Imported from Jira [BEAM-3625](https://issues.apache.org/jira/browse/BEAM-3625). Original Jira may contain additional context.
Reported by: robertwb.

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Research direction

The issue concerns DoFn.XxxParam handling for Map and FlatMap, but it names no files or tests and links only the imported BEAM-3625 report. Start by tracing parameter handling for those two transforms and compare their behavior. Done means the reported XxxParam use works consistently in both Map and FlatMap, with focused coverage added where the existing behavior is tested.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
data-engineering
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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