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From "Kenneth Knowles (JIRA)" <>
Subject [jira] [Assigned] (BEAM-311) Add 'garbage collection' hold when receive late element
Date Thu, 20 Apr 2017 04:13:04 GMT


Kenneth Knowles reassigned BEAM-311:

    Assignee: Kenneth Knowles  (was: Mark Shields)

> Add 'garbage collection' hold when receive late element
> -------------------------------------------------------
>                 Key: BEAM-311
>                 URL:
>             Project: Beam
>          Issue Type: Bug
>          Components: runner-core
>            Reporter: Mark Shields
>            Assignee: Kenneth Knowles
> 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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