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https://issues.apache.org/jira/browse/BEAM-344?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ben Chambers updated BEAM-344:
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Summary: Merge, Split, Delay, and Reorder bundles in the DirectRunner
(was: Merge, Split, Delay, and Reorder bundles in the InProcessPipelineRunner)
> Merge, Split, Delay, and Reorder bundles in the DirectRunner
> ------------------------------------------------------------
>
> Key: BEAM-344
> URL: https://issues.apache.org/jira/browse/BEAM-344
> Project: Beam
> Issue Type: Improvement
> Components: runner-direct
> Reporter: Thomas Groh
> Assignee: Thomas Groh
> Priority: Minor
>
> PCollections have no guarantees about the ordering of elements between steps
> Randomly reordering, splitting and merging bundles will break user pipelines
> which assume some order will be maintained between steps and within a bundle.
> This assumption is not correct, so should break in the Direct Runner.
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