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https://issues.apache.org/jira/browse/BEAM-8657?focusedWorklogId=343635&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-343635
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ASF GitHub Bot logged work on BEAM-8657:
----------------------------------------
Author: ASF GitHub Bot
Created on: 14/Nov/19 18:40
Start Date: 14/Nov/19 18:40
Worklog Time Spent: 10m
Work Description: robertwb commented on pull request #10109: [BEAM-8657]
Combiner lifting fix for bundle-based direct runner.
URL: https://github.com/apache/beam/pull/10109
------------------------
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Issue Time Tracking
-------------------
Worklog Id: (was: 343635)
Time Spent: 1h 10m (was: 1h)
> Not doing Combiner lifting for data-driven triggers
> ---------------------------------------------------
>
> Key: BEAM-8657
> URL: https://issues.apache.org/jira/browse/BEAM-8657
> Project: Beam
> Issue Type: Bug
> Components: sdk-py-core
> Reporter: wendy liu
> Assignee: Robert Bradshaw
> Priority: Major
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> The test below will always produce empty output, due to combiner lifting,
> which already combines all input values of one shard into one before
> grouping. To fix this, we shall not do Combiner lifting for the data-driven
> triggers.
> l = [window.TimestampedValue(('a', 1), 1),
> window.TimestampedValue(('b', 3), 3),
> window.TimestampedValue(('a', 2), 2),
> window.TimestampedValue(('a', 5), 5),]
> result = (p | Map(lambda x : x) | 'window' >>
> beam.WindowInto(FixedWindows(6), trigger=trigger.AfterCount(2),
> accumulation_mode=trigger.AccumulationMode.DISCARDING) |
> beam.CombinePerKey(combine.Largest(1)))
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