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https://issues.apache.org/jira/browse/FLINK-2899?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Flink Jira Bot updated FLINK-2899:
----------------------------------
Labels: auto-deprioritized-major stale-minor (was:
auto-deprioritized-major)
I am the [Flink Jira Bot|https://github.com/apache/flink-jira-bot/] and I help
the community manage its development. I see this issues has been marked as
Minor but is unassigned and neither itself nor its Sub-Tasks have been updated
for 180 days. I have gone ahead and marked it "stale-minor". If this ticket is
still Minor, please either assign yourself or give an update. Afterwards,
please remove the label or in 7 days the issue will be deprioritized.
> The groupReduceOn* methods which take types as a parameter fail with
> TypeErasure
> --------------------------------------------------------------------------------
>
> Key: FLINK-2899
> URL: https://issues.apache.org/jira/browse/FLINK-2899
> Project: Flink
> Issue Type: Bug
> Components: Library / Graph Processing (Gelly)
> Affects Versions: 0.10.0
> Reporter: Andra Lungu
> Priority: Minor
> Labels: auto-deprioritized-major, stale-minor
>
> I tried calling groupReduceOnEdges (EdgesFunctionWithVertexValue<K, VV, EV,
> T> edgesFunction, EdgeDirection direction, TypeInformation<T> typeInfo) in
> order to make the vertex-centric version of the Triangle Count library method
> applicable to any kind of key and I got a TypeErasure Exception.
> After doing a bit of debugging (see the hack in
> https://github.com/andralungu/flink/tree/trianglecount-vertexcentric), I saw
> that actually the call to
> TypeExtractor.createTypeInfo(NeighborsFunctionWithVertexValue.class, .... in
> ApplyNeighborCoGroupFunction does not work properly, i.e. it returns null.
> From what I see, the coGroup in groupReduceOnNeighbors tries to infer a type
> before "returns" is called.
> I may be missing something, but that particular feature (groupReduceOn with
> types) is not documented or tested so we would also need some tests for that.
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