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https://issues.apache.org/jira/browse/FLINK-2178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14584877#comment-14584877
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ASF GitHub Bot commented on FLINK-2178:
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Github user vasia commented on the pull request:
https://github.com/apache/flink/pull/799#issuecomment-111760267
Hey @andralungu,
I'm not sure I understand this one. It's a coGroup of vertices with the
edges. For the vertex iterator to be empty, doesn't it mean that there's an
edge with an invalid id?
> groupReduceOnNeighbors throws NoSuchElementException
> ----------------------------------------------------
>
> Key: FLINK-2178
> URL: https://issues.apache.org/jira/browse/FLINK-2178
> Project: Flink
> Issue Type: Bug
> Components: Gelly
> Affects Versions: 0.9
> Reporter: Andra Lungu
> Assignee: Andra Lungu
>
> In the ALL EdgeDirection case, ApplyCoGroupFunctionOnAllNeighbors does not
> check whether the vertex iterator has elements causing the aforementioned
> exception.
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