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Posted to github@beam.apache.org by GitBox <gi...@apache.org> on 2022/06/04 19:54:29 UTC

[GitHub] [beam] damccorm opened a new issue, #20849: WriteToFiles with a concrete sink can shunt data to a single window

damccorm opened a new issue, #20849:
URL: https://github.com/apache/beam/issues/20849

   When given a concrete `FileSink`, `WriteToFiles` will re-use the same sink across windows: 
   - https://github.com/apache/beam/blob/e92d184abc79fe84c48de3dfd9dd168d9b38feac/sdks/python/apache_beam/io/fileio.py#L461
   - https://github.com/apache/beam/blob/e92d184abc79fe84c48de3dfd9dd168d9b38feac/sdks/python/apache_beam/io/fileio.py#L625
   
   This can lead to data for one window being written to the sink for another window.
   
   See discussion: https://github.com/apache/beam/pull/14374#discussion_r604320333
   
   Imported from Jira [BEAM-12072](https://issues.apache.org/jira/browse/BEAM-12072). Original Jira may contain additional context.
   Reported by: bhulette.


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