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Posted to issues@beam.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2020/12/14 22:06:00 UTC
[jira] [Work logged] (BEAM-11196) Composite transform structure not
preserved with fusion.
[ https://issues.apache.org/jira/browse/BEAM-11196?focusedWorklogId=524140&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-524140 ]
ASF GitHub Bot logged work on BEAM-11196:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 14/Dec/20 22:05
Start Date: 14/Dec/20 22:05
Worklog Time Spent: 10m
Work Description: yifanmai opened a new pull request #13549:
URL: https://github.com/apache/beam/pull/13549
Fixes a bug introduced by #13202 where the parent for a fused stage (or packed combiner) gets set to `None` if more than two stages are fused (or packed). This occurs because `_lowest_common_ancestor` uses the `subtransforms` field of the `PipelineContext`'s transforms to figure out parent-child relationships. However, a stage that is created by fusion or by another optimizer phase will not be present in the `PipelineContext`'s transforms. As a result, such a stage is passed to `_lowest_common_ancestor`, it will return `None`. This change fixes it by additionally using the `parent` field of the input stages.
This bug only affects runners that use `translations.pipeline_from_stages` with `partial=True`.
------------------------
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Issue Time Tracking
-------------------
Worklog Id: (was: 524140)
Time Spent: 3h 10m (was: 3h)
> Composite transform structure not preserved with fusion.
> --------------------------------------------------------
>
> Key: BEAM-11196
> URL: https://issues.apache.org/jira/browse/BEAM-11196
> Project: Beam
> Issue Type: Bug
> Components: sdk-py-core
> Reporter: Robert Bradshaw
> Assignee: Yifan Mai
> Priority: P2
> Time Spent: 3h 10m
> Remaining Estimate: 0h
>
> This causes problems with combiner packing, among other things.
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