[jira] [Resolved] (FLINK-2279) Allow treating iteration head as ConnectedDataStream

["Gyula Fora (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-2279?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gyula Fora resolved FLINK-2279.
-------------------------------
    Resolution: Fixed

> Allow treating iteration head as ConnectedDataStream 
> -----------------------------------------------------
>
>                 Key: FLINK-2279
>                 URL: https://issues.apache.org/jira/browse/FLINK-2279
>             Project: Flink
>          Issue Type: New Feature
>          Components: Streaming
>    Affects Versions: 0.10
>            Reporter: Gyula Fora
>            Assignee: Gyula Fora
>            Priority: Minor
>
> Currently the streaming iterations are restricted to use the same input and feedback types which are routed through the same operator.
> This means that if the user want to distinguish between normal input and feedback record he/she needs to mark it somehow and also a wrapper type is necessary for handling separate input and feedback types.
> This makes implementing iterative algorithms (such as ML) quite ugly at some points.
> I propose to let the user treat the normal input if the iteration head operator and the feedback input as a ConnectedDataStream which can be used to apply co-operators both distinguishing the inputs and allowing different feedback types for elegant implementations.



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