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Posted to commits@beam.apache.org by "Niel Markwick (JIRA)" <ji...@apache.org> on 2018/07/16 11:17:00 UTC

[jira] [Created] (BEAM-4796) SpannerIO waits for all input before writing

Niel Markwick created BEAM-4796:
-----------------------------------

             Summary: SpannerIO waits for all input before writing
                 Key: BEAM-4796
                 URL: https://issues.apache.org/jira/browse/BEAM-4796
             Project: Beam
          Issue Type: Bug
          Components: io-java-gcp
    Affects Versions: 2.5.0
            Reporter: Niel Markwick
            Assignee: Chamikara Jayalath


SpannerIO.Write waits for all input in the window to arrive before getting the schema:

[https://github.com/apache/beam/blame/release-2.5.0/sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/spanner/SpannerIO.java#L841]

 

In streaming mode, this is not an issue, but in batch mode, this causes the pipeline to stall until all input is read, which could be a significant amount of time (and temp data). 

 

 



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