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From "Mark Shields (JIRA)" <>
Subject [jira] [Created] (BEAM-311) Add 'garbage collection' hold when receive late element
Date Wed, 25 May 2016 22:08:12 GMT
Mark Shields created BEAM-311:

             Summary: Add 'garbage collection' hold when receive late element
                 Key: BEAM-311
             Project: Beam
          Issue Type: Bug
          Components: runner-core
            Reporter: Mark Shields
            Assignee: Frances Perry

We currently add a 'garbage collection' hold in WatermarkHold (invoked via ReduceFnRunner)
if the closing behavior is FIRE_ALWAYS. This means an element which has come in too late for
a data holds and an end-of-window hold may end up setting no hold at all. As a result, the
eventual pane containing that element may end up dropped as being too late.

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