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Posted to issues@beam.apache.org by "Siyuan Chen (Jira)" <ji...@apache.org> on 2021/03/23 18:19:00 UTC

[jira] [Created] (BEAM-12040) WriteFiles withRunnerDeterminedShardingUnbounded doesn't work with session windows

Siyuan Chen created BEAM-12040:
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             Summary: WriteFiles withRunnerDeterminedShardingUnbounded doesn't work with session windows
                 Key: BEAM-12040
                 URL: https://issues.apache.org/jira/browse/BEAM-12040
             Project: Beam
          Issue Type: Improvement
          Components: io-java-files
            Reporter: Siyuan Chen


Currently the implementation of `withRunnerDeterminedShardingUnbounded` uses a stateful DoFn to achieve the grouping and batching of the input elements, which doesn't support session windows. One possible way is to add another GBK prior to the stateful DoFn to first get session windows merged and reify the window before invoking the sateful DoFn. 



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