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https://issues.apache.org/jira/browse/FLINK-3669?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15223402#comment-15223402
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Konstantin Knauf commented on FLINK-3669:
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I tried to implement the 1.. The hard part, I think, is to store the
{{ScheduledFuture}}s to in the {{WindowOperator}}. We could use a
{{Map<Long,ScheduledFuture>}}, but this only works if we also implement timer
coalescing. Besides that I am unsure about how to de/serialize this map. Could
you give me pointer?
> WindowOperator registers a lot of timers at StreamTask
> ------------------------------------------------------
>
> Key: FLINK-3669
> URL: https://issues.apache.org/jira/browse/FLINK-3669
> Project: Flink
> Issue Type: Bug
> Components: Streaming
> Affects Versions: 1.0.1
> Reporter: Aljoscha Krettek
> Priority: Blocker
>
> Right now, the WindowOperator registers a timer at the StreamTask for every
> processing-time timer that a Trigger registers. We should combine several
> registered trigger timers to only register one low-level timer (timer
> coalescing).
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