[
https://issues.apache.org/jira/browse/BEAM-10517?focusedWorklogId=459970&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-459970
]
ASF GitHub Bot logged work on BEAM-10517:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 16/Jul/20 21:38
Start Date: 16/Jul/20 21:38
Worklog Time Spent: 10m
Work Description: kennknowles opened a new pull request #12284:
URL: https://github.com/apache/beam/pull/12284
This eliminates all but one nullness error (which I think is just an
annotation issue) from `MultiStepCombine`.
There were multiple real issues, including a crash on anything with null
allowed as accumulator, such as zetasketch.
This is factored into very small commits, because earlier commits are simple
and stand alone.
------------------------
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Issue Time Tracking
-------------------
Worklog Id: (was: 459970)
Remaining Estimate: 0h
Time Spent: 10m
> 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
> Priority: P1
> Time Spent: 10m
> Remaining Estimate: 0h
>
> 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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