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https://issues.apache.org/jira/browse/FLINK-3669?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15260086#comment-15260086
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Aljoscha Krettek commented on FLINK-3669:
-----------------------------------------

Thanks! I'll have a look at your branch. For the test-stability, I think there 
is some problem with the maven caches on Travis. We're waiting for the Infra 
team to respond.

> 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
>            Assignee: Konstantin Knauf
>            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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