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https://issues.apache.org/jira/browse/FLINK-5097?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15684009#comment-15684009
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ASF GitHub Bot commented on FLINK-5097:
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Github user greghogan commented on the issue:
https://github.com/apache/flink/pull/2842
I count nine uses of `TypeExtractor.createTypeInfo` in `Graph` and one each
in `ScatterGatherIteration`, `VertexCentricIteration`, and
`GatherSumApplyIteration`. The latter still need to allow for the UDF to
implement `ResultTypeQueryable`.
For example, won't `ScatterGatherIteration` type extraction currently fail
on a `ScatterFunction` where the `Message` type is based on `K`, 'VV`, or `EV`?
> The TypeExtractor is missing input type information in some Graph methods
> -------------------------------------------------------------------------
>
> Key: FLINK-5097
> URL: https://issues.apache.org/jira/browse/FLINK-5097
> Project: Flink
> Issue Type: Bug
> Components: Gelly
> Reporter: Vasia Kalavri
> Assignee: Vasia Kalavri
>
> The TypeExtractor is called without information about the input type in
> {{mapVertices}} and {{mapEdges}} although this information can be easily
> retrieved.
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