Thomas Groh created BEAM-2569:
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Summary: Be more precise in what is required to write a valid
CombineFn
Key: BEAM-2569
URL: https://issues.apache.org/jira/browse/BEAM-2569
Project: Beam
Issue Type: Bug
Components: beam-model, sdk-java-core, sdk-py
Reporter: Thomas Groh
We should be explicit in requiring merging of accumulators to be associative
and commutative, and the ability to include empty accumulators.
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