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https://issues.apache.org/jira/browse/TINKERPOP3-801?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14876204#comment-14876204
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Marko A. Rodriguez commented on TINKERPOP3-801:
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This is NOT a Kryo version conflict like a I suspected. This is due to the fact
that {{ComputerGraph.ComputerVertex}} is being put into Spark's KryoSerializer
and what REALLY needs to be put there is {{StarGraph.StarVertex}}. This is
easily solved by writing a custom serializer, but then at that point we should
really be using Gryo serializers in Spark-Gremlin.... [~spmallette] is looking
into a solution for allowing us to get the shaded Kryo of Gryo exposed as
native Kryo in Spark-Gremlin. .... dar.
I can solve this in both 3.0.2 and 3.1.0 so if the "Gryo exposure" can happen
in 3.0.2, that would be great.
> groupCount() fails for vertices (elements?) (using Spark)
> ---------------------------------------------------------
>
> Key: TINKERPOP3-801
> URL: https://issues.apache.org/jira/browse/TINKERPOP3-801
> Project: TinkerPop 3
> Issue Type: Bug
> Components: process
> Affects Versions: 3.0.1-incubating
> Reporter: Daniel Kuppitz
> Assignee: Marko A. Rodriguez
> Fix For: 3.1.0-incubating
>
>
> Here's the test case:
> https://github.com/apache/incubator-tinkerpop/blob/tp30/gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/sideEffect/GroupCountTest.java#L80
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