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https://issues.apache.org/jira/browse/FLINK-1073?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Fabian Hueske resolved FLINK-1073.
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Resolution: Fixed
Fixed with e5731e0ed7f7294e6f73970fed8315cb572c9cfd
> SortGroup() does not sort Combiner input
> ----------------------------------------
>
> Key: FLINK-1073
> URL: https://issues.apache.org/jira/browse/FLINK-1073
> Project: Flink
> Issue Type: Bug
> Components: Java API
> Affects Versions: 0.6.1-incubating, 0.7-incubating
> Reporter: Fabian Hueske
> Assignee: Fabian Hueske
> Priority: Critical
> Fix For: 0.6.1-incubating, 0.7-incubating
>
>
> Flink supports sorted input for GroupReduce operators by calling for example
> {code}
> myData.groupBy(1).sortGroup(2, Order.ASCENDING).reduceGroup(new MyReducer());
> {code}
> This code will sort the input of the function {{MyReducer.reduce()}} on the
> third field.
> However, the input of {{MyReducer.combine()}} is not sorted, which is an
> unexpected behavior, IMO.
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