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From "Aljoscha Krettek (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (FLINK-5363) Fire timers when window state is currently empty
Date Fri, 13 Oct 2017 16:12:02 GMT

     [ https://issues.apache.org/jira/browse/FLINK-5363?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aljoscha Krettek reassigned FLINK-5363:
---------------------------------------

    Assignee:     (was: Aljoscha Krettek)

> Fire timers when window state is currently empty
> ------------------------------------------------
>
>                 Key: FLINK-5363
>                 URL: https://issues.apache.org/jira/browse/FLINK-5363
>             Project: Flink
>          Issue Type: Bug
>          Components: DataStream API
>            Reporter: Aljoscha Krettek
>
> Currently, when a {{Trigger}} sets a timer and that timer fires in the future at a point
when there is currently no data in the window state, then that timer is being ignored.
> This is a problem for some users because they manually set cleanup timers and they need
to be called because the trigger needs to cleanup some state. (For normal time windows this
is not a problem, but for special cases built on top of {{GlobalWindows}} the current behaviour
leads to problems.)



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