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https://issues.apache.org/jira/browse/FLINK-2283?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14945160#comment-14945160
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ASF GitHub Bot commented on FLINK-2283:
---------------------------------------

Github user asfgit closed the pull request at:

    https://github.com/apache/flink/pull/1155


> Make grouped reduce/fold/aggregations stateful using Partitioned state
> ----------------------------------------------------------------------
>
>                 Key: FLINK-2283
>                 URL: https://issues.apache.org/jira/browse/FLINK-2283
>             Project: Flink
>          Issue Type: Improvement
>          Components: Streaming
>    Affects Versions: 0.10
>            Reporter: Gyula Fora
>            Assignee: Márton Balassi
>            Priority: Minor
>
> Currently the inner state of the grouped aggregations are not persisted as an 
> operator state. 
> These operators should be reimplemented to use the newly introduced 
> partitioned state abstractions which will make them fault tolerant and 
> scalable for the future.
> A suggested implementation would be to use a stateful mapper to implement the 
> desired behaviour.



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