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https://issues.apache.org/jira/browse/BEAM-3471?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16324019#comment-16324019
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Etienne Chauchot commented on BEAM-3471:
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Note that in the case of Spark runner, it could be {{SourceRdd.close()}} but it
would be still good to have a trans-runner callback that is the same for all
the runners.
> Create a callback triggered at the end of a batch in spark runner
> -----------------------------------------------------------------
>
> Key: BEAM-3471
> URL: https://issues.apache.org/jira/browse/BEAM-3471
> Project: Beam
> Issue Type: Improvement
> Components: runner-spark
> Reporter: Etienne Chauchot
> Assignee: Jean-Baptiste Onofré
>
> In the future we might add new features to the runners for which we might
> need to do some processing at the end of a batch. Currently there is not
> unique place (a callback) to add this processing.
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