[jira] [Created] (FLINK-7018) Reconstruct streamgraph to clear interface

[Xu Pingyong (JIRA)]

Xu Pingyong created FLINK-7018:
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             Summary:  Reconstruct streamgraph to clear interface
                 Key: FLINK-7018
                 URL: https://issues.apache.org/jira/browse/FLINK-7018
             Project: Flink
          Issue Type: Improvement
            Reporter: Xu Pingyong
            Assignee: Xu Pingyong


StreamGraph not only contains streamNodes and streamEdges, but also contains 
virtual nodes who has nothing to do with the streamGraph. 
Virtual nodes should be converted to streamNodes in   StreamGraphGenerator.class



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