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Posted to github@beam.apache.org by GitBox <gi...@apache.org> on 2022/06/03 18:40:55 UTC

[GitHub] [beam] kennknowles opened a new issue, #18501: Support Custom Windows in Spark runner

kennknowles opened a new issue, #18501:
URL: https://github.com/apache/beam/issues/18501

   If we extend `IntervalWindow` and we try to merge these custom windows like in this PR:
   https://github.com/apache/beam/pull/3286
   Then spark runner fails with 
   
   `org.apache.beam.sdk.Pipeline$PipelineExecutionException: java.lang.ClassCastException: org.apache.beam.sdk.transforms.windowing.IntervalWindow cannot be cast to org.apache.beam.sdk.transforms.windowing.MergingCustomWindowsTest$CustomWindow`
   
   It seems to be because of the cast to `IntervalWindow` there: https://github.com/apache/beam/blob/master/runners/spark/src/main/java/org/apache/beam/runners/spark/translation/SparkGlobalCombineFn.java#L111
   
   Imported from Jira [BEAM-2499](https://issues.apache.org/jira/browse/BEAM-2499). Original Jira may contain additional context.
   Reported by: echauchot.


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