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https://issues.apache.org/jira/browse/FLINK-18295?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhu Zhu updated FLINK-18295:
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> Remove the hack logics of result consumers
> ------------------------------------------
>
> Key: FLINK-18295
> URL: https://issues.apache.org/jira/browse/FLINK-18295
> Project: Flink
> Issue Type: Technical Debt
> Components: Runtime / Coordination
> Reporter: Zhu Zhu
> Priority: Major
>
> Currently an {{IntermediateDataSet}} can have multiple {{JobVertex}} as its
> consumers. That's why the consumers of a `IntermediateResultPartition` is in
> the form of {{List<List<ExecutionEdge>>}}.
> However, in scheduler/{{ExecutionGraph}} there is assumption that one
> `IntermediateResultPartition` can be consumed by one only
> `ExecutionJobVertex`. This results in a lot of hack logics which assumes
> partition consumers to contain a single list.
> We should remove these hack logics. The idea is to change
> `IntermediateResultPartition#consumers` to be `List<ExecutionEdge>`.
> `ExecutionGraph` building logics should be adjusted accordingly with the
> assumption that an `IntermediateResult` can have one only consumer vertex. In
> `JobGraph`, there should also be check logics for this assumption.
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