Kenneth Knowles created BEAM-10517:
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Summary: DirectRunner drops null accumulators in multi-step combine
Key: BEAM-10517
URL: https://issues.apache.org/jira/browse/BEAM-10517
Project: Beam
Issue Type: Bug
Components: runner-direct
Reporter: Kenneth Knowles
Assignee: Kenneth Knowles
When outputting accumulators in pre-combine, the direct runner iterates over a
map of accumulators. However, since an accumulator can be null (such as in
zetasketch) these accumulators will not be output.
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