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https://issues.apache.org/jira/browse/FLINK-2283?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14942206#comment-14942206
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ASF GitHub Bot commented on FLINK-2283:
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Github user mbalassi commented on the pull request:
https://github.com/apache/flink/pull/1155#issuecomment-145230558
Quick update:
I made some progress on the custom state checkpointer solution, but run
into an issue with key selectors. This would break the current API usage of
aggregations, so I need to solve it or work around it first. [1]
[1] https://issues.apache.org/jira/browse/FLINK-2812
> 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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