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https://issues.apache.org/jira/browse/SPARK-18568?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen resolved SPARK-18568.
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Resolution: Not A Problem
Yes, the result of updating a mutable object in an RDD is undefined. If that's
the essence of this, then it's not a problem.
> vertex attributes in the edge triplet not getting updated in super steps for
> Pregel API
> ---------------------------------------------------------------------------------------
>
> Key: SPARK-18568
> URL: https://issues.apache.org/jira/browse/SPARK-18568
> Project: Spark
> Issue Type: Bug
> Components: GraphX
> Affects Versions: 2.0.2
> Reporter: Rohit
>
> When running the Pregel API with vertex attribute as complex objects. The
> vertex attributes are not getting updated in the triplet view. For example if
> the vertex attributes changes in first superstep for vertex"a" the triplet
> src attributes in the send msg program for the first super step gets the
> latest attributes of the vertex "a" but on 2nd super step if the vertex
> attributes changes in the vprog the edge triplets are not updated with this
> new state of the vertex for all the edge triplets having the vertex "a" as
> src or destination. if I re-create the graph using g = Graph(g.vertices,
> g.edges) in the while loop before the next super step then its getting
> updated. But this fix is not good performance wise. A detailed description of
> the bug along with the code to recreate it is in the attached URL.
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