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https://issues.apache.org/jira/browse/FLINK-2335?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aljoscha Krettek resolved FLINK-2335.
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Resolution: Fixed
> Rework iteration construction in StreamGraph
> --------------------------------------------
>
> Key: FLINK-2335
> URL: https://issues.apache.org/jira/browse/FLINK-2335
> Project: Flink
> Issue Type: Improvement
> Components: Streaming
> Reporter: Gyula Fora
> Assignee: Gyula Fora
>
> Currently the nodes representing the extra sinks and sources are
> incrementally added to the streamgraph when the user creates the iterative
> parts of the program.
> This makes it difficult to enforce different partitioning schemes on the
> feedback edges and also makes it virtually impossible to handle more
> iteration heads with different parallelism.
> The actual nodes in the streamgraph for the iteration sinks/sources should
> only be created when the program is finalized after the user calls execute
> and before we create the jobgraph.
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