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From "Paris Carbone (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-2836) Cyclic Topologies not supported
Date Thu, 08 Oct 2015 14:06:27 GMT

    [ https://issues.apache.org/jira/browse/FLINK-2836?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14948704#comment-14948704
] 

Paris Carbone commented on FLINK-2836:
--------------------------------------

Maybe the Flink->Samoa Topology integration will help you out, it is in fact the same thing.

https://github.com/apache/incubator-samoa/blob/master/samoa-flink/src/main/java/org/apache/samoa/flink/topology/impl/FlinkTopology.java

> Cyclic Topologies not supported
> -------------------------------
>
>                 Key: FLINK-2836
>                 URL: https://issues.apache.org/jira/browse/FLINK-2836
>             Project: Flink
>          Issue Type: Improvement
>          Components: Storm Compatibility
>            Reporter: Matthias J. Sax
>
> Currently, FlinkTopologyBuilder cannot handle cyclic topologies. In order to implement
this feature correctly, FlinkTopologyBuilder must first *detect* cycles in the topology and
assembly the Flink streaming program accordingly.
> As Storm allows for arbitrary dataflow structure, multiple cycles would be allows. Not
sure if Flink can handle those.



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