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https://issues.apache.org/jira/browse/BEAM-9526?focusedWorklogId=404377&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-404377
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ASF GitHub Bot logged work on BEAM-9526:
----------------------------------------
Author: ASF GitHub Bot
Created on: 17/Mar/20 01:03
Start Date: 17/Mar/20 01:03
Worklog Time Spent: 10m
Work Description: youngoli commented on pull request #11143: [BEAM-9526]
Add missing unmarshalling in top.LargestPerKey.
URL: https://github.com/apache/beam/pull/11143
ExtractOutput wasn't unmarshalling the accumulator first, which would
cause the values to get dropped if the accumulator was marshalled when
ExtractOutput was called. This fixes that and modifies the unit test
slightly to catch it if it stops working in the future.
------------------------
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Issue Time Tracking
-------------------
Worklog Id: (was: 404377)
Remaining Estimate: 0h
Time Spent: 10m
> Bug in top.LargestPerKey, disappearing elements.
> ------------------------------------------------
>
> Key: BEAM-9526
> URL: https://issues.apache.org/jira/browse/BEAM-9526
> Project: Beam
> Issue Type: Bug
> Components: sdk-go
> Reporter: Daniel Oliveira
> Assignee: Daniel Oliveira
> Priority: Minor
> Time Spent: 10m
> Remaining Estimate: 0h
>
> There's a bug in top.LargestPerKey that appears when running it on a runner
> that has combiner lifting. Since it's similar to a GBK, we should be
> inputting a K, V and receiving a K, []V as output. When the runner has
> combiner lifting, the []V always contains an empty slice.
>
> I already found the fix for this, just logging this to attach it to the PR.
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