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https://issues.apache.org/jira/browse/FLINK-1222?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14201878#comment-14201878
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Stephan Ewen commented on FLINK-1222:
-------------------------------------

I added this change non the less, it was a 5 minute fix. It lets the web 
monitor plots reflect the actual execution times much better.

> Let tasks finish as soon as their data is sent
> ----------------------------------------------
>
>                 Key: FLINK-1222
>                 URL: https://issues.apache.org/jira/browse/FLINK-1222
>             Project: Flink
>          Issue Type: Improvement
>          Components: Distributed Runtime
>    Affects Versions: 0.8-incubating
>            Reporter: Stephan Ewen
>            Assignee: Stephan Ewen
>            Priority: Minor
>             Fix For: 0.8-incubating
>
>
> Currently tasks finish only after their successor has left the run() method, 
> because only then the close acknowledgements are sent. Sending the close 
> acknowledgements earlier would free resources earlier and lead to more 
> understandable execution timestamps.



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