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https://issues.apache.org/jira/browse/GIRAPH-245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13410320#comment-13410320
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Maja Kabiljo commented on GIRAPH-245:
-------------------------------------
That piece of code only gets executed if there is a mutation, or if we receive
a message for a vertexId which doesn't exist. None of these should happen if
vertices are not mutable. But maybe we could add an informative message instead
of crashing.
On a related note, in prepareSuperstep in NettyWorkerServer we will throw an
IllegalStateException if we have a mutation to add a vertex and we received
messages for that vertex (line 119). Is that a desired behavior?
> BasicRPCCommunications fails with custom vertices
> -------------------------------------------------
>
> Key: GIRAPH-245
> URL: https://issues.apache.org/jira/browse/GIRAPH-245
> Project: Giraph
> Issue Type: Bug
> Affects Versions: 0.2.0
> Reporter: Sebastian Schelter
>
> BasicRPCCommunications assumes that every vertex is an instance of
> MutableVertex in line 1265:
> {noformat}
> if (vertex != null) {
> ((MutableVertex<I, V, E, M>) vertex).setVertexId(vertexIndex);
> partition.putVertex(vertex);
> }
> {noformat}
> For custom vertices that only extend BasicVertex, this code fails with a
> ClassCastException
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