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Posted to issues@beam.apache.org by "Beam JIRA Bot (Jira)" <ji...@apache.org> on 2020/09/02 17:08:38 UTC

[jira] [Updated] (BEAM-2007) DataflowRunner drops Reads with no consumers

     [ https://issues.apache.org/jira/browse/BEAM-2007?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Beam JIRA Bot updated BEAM-2007:
--------------------------------
    Priority: P3  (was: P2)

> DataflowRunner drops Reads with no consumers
> --------------------------------------------
>
>                 Key: BEAM-2007
>                 URL: https://issues.apache.org/jira/browse/BEAM-2007
>             Project: Beam
>          Issue Type: Bug
>          Components: runner-dataflow, sdk-py-core
>            Reporter: Dan Halperin
>            Priority: P3
>              Labels: stale-P2
>
> Basically, if a pipeline has "just" a Read with no consumers, the optimizer in Dataflow will drop it. To preserve Beam semantics, we do want to run the Read and drop its output, e.g., because the Read may have side effects that we're testing for.
> Is it possible with pipeline surgery to find such Reads and add an Identity ParDo to them?



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