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https://issues.apache.org/jira/browse/BEAM-5682?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ismaël Mejía reassigned BEAM-5682:
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Assignee: (was: Amit Sela)
> Reshuffle causes brittle pipelines on Spark runner
> --------------------------------------------------
>
> Key: BEAM-5682
> URL: https://issues.apache.org/jira/browse/BEAM-5682
> Project: Beam
> Issue Type: Bug
> Components: runner-spark
> Reporter: Mike Kaplinskiy
> Priority: Major
>
> The latest Spark releases have a bug which makes calls to {{repartition}}
> non-retriable (https://issues.apache.org/jira/browse/SPARK-25341) as a fix to
> https://issues.apache.org/jira/browse/SPARK-23243. Beam uses repartition as
> the implementation of {{Reshuffle}}. This makes beam-based spark pipelines
> not resilient when using {{Reshuffle}} - a single executor failure kills the
> entire pipeline.
> The fix that I have locally is just to remove the special-casing of
> {{Reshuffle}} in the spark runner
> (https://github.com/apache/beam/blob/279a05604b83a54e8e5a79e13d8761f94841f326/runners/spark/src/main/java/org/apache/beam/runners/spark/translation/TransformTranslator.java#L579).
> The reshuffle default expansion seems to do a fine job in reshuffling & the
> pipeline becomes resilient to executor failures.
> I'm not entirely sure if this is a beam bug or not, but I figure it's worth
> making others aware of the current behavior.
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