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From "Mark Shields (JIRA)" <>
Subject [jira] [Created] (BEAM-175) Leak garbage collection timers in GlobalWindow
Date Tue, 05 Apr 2016 22:20:25 GMT
Mark Shields created BEAM-175:

             Summary: Leak garbage collection timers in GlobalWindow
                 Key: BEAM-175
             Project: Beam
          Issue Type: Bug
          Components: runner-core
            Reporter: Mark Shields
            Assignee: Frances Perry

Consider the  transform:
    .into(new GlobalWindows())
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).

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