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Posted to github@beam.apache.org by GitBox <gi...@apache.org> on 2022/06/04 17:08:58 UTC

[GitHub] [beam] damccorm opened a new issue, #20356: Group.globally().aggregate(Count.combineFn())) Throws Error

damccorm opened a new issue, #20356:
URL: https://github.com/apache/beam/issues/20356

   Trying to Count the number of rows in a window with Group and Combiner (as opposed to GroupBy "*" or a any field), but get an error:
   
                   .apply("WindowByMinute", Window.into(FixedWindows.of(Duration.standardSeconds(60))))
                   .apply("CountPerMinute", Group.<Row\>globally().aggregate(Count.combineFn()))
   threw:
   ERROR] Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.6.0:java (default-cli) on project advanced-dataflow-lab: An exception occured while executing the Java class. If the input collection uses a windowing strategy other than GlobalWindows, use Combine.globally(Count.<T\>combineFn()).withoutDefaults() instead. -\> 
   
   Reuven Lax has indicated this is likely a bug.
   
   Imported from Jira [BEAM-10297](https://issues.apache.org/jira/browse/BEAM-10297). Original Jira may contain additional context.
   Reported by: dhodun.


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