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Posted to github@beam.apache.org by GitBox <gi...@apache.org> on 2022/06/03 16:07:00 UTC

[GitHub] [beam] kennknowles opened a new issue, #17988: Don't leak garbage collection timers in GlobalWindow

kennknowles opened a new issue, #17988:
URL: https://github.com/apache/beam/issues/17988

   Consider the  transform:
     Window
       .into(new GlobalWindows())
       .triggering(
         Repeatedly.forever(
           AfterProcessingTime.pastFirstElementInPane().plusDelayOf(...)))
       .discardingFiredPanes()
   This is a common idiom for 'process elements bunched by arrival time'.
   Currently we create an end-of-window timer per key, which clearly will only fire if the pipeline is drained.
   Better would be to avoid creating end-of-window timers if there's no state which needs to be processed at end-of-window (ie at drain if the Global window).
   
   Imported from Jira [BEAM-175](https://issues.apache.org/jira/browse/BEAM-175). Original Jira may contain additional context.
   Reported by: mshields822.


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