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Posted to github@beam.apache.org by GitBox <gi...@apache.org> on 2022/06/04 12:36:22 UTC

[GitHub] [beam] damccorm opened a new issue, #19650: CombineGlobally translation is risky and not very performant.

damccorm opened a new issue, #19650:
URL: https://github.com/apache/beam/issues/19650

   In combine globally:
   ```
   
   Iterable<WindowedValue<OutputT>> output =
                 sparkCombineFn.extractOutput(maybeAccumulated.get());
   
            outRdd =
                 context
                     .getSparkContext()
                     .parallelize(CoderHelpers.toByteArrays(output,
   wvoCoder))
                     .map(CoderHelpers.fromByteFunction(wvoCoder));
   
   ```
   
   =\> risk of OOM in the list, get data to a single worker (the driver)
   
   
   
   Imported from Jira [BEAM-7647](https://issues.apache.org/jira/browse/BEAM-7647). Original Jira may contain additional context.
   Reported by: echauchot.


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