Github user thunterdb commented on a diff in the pull request:
https://github.com/apache/spark/pull/16483#discussion_r106529377
--- Diff: graphx/src/main/scala/org/apache/spark/graphx/lib/PageRank.scala
---
@@ -353,9 +365,19 @@ object PageRank extends Logging {
vertexProgram(id, attr, msgSum)
}
- Pregel(pagerankGraph, initialMessage, activeDirection =
EdgeDirection.Out)(
+ val rankGraph = Pregel(pagerankGraph, initialMessage, activeDirection
= EdgeDirection.Out)(
vp, sendMessage, messageCombiner)
.mapVertices((vid, attr) => attr._1)
- } // end of deltaPageRank
+
+ // If the graph has sinks (vertices with no outgoing edges) the sum of
ranks will not be correct
--- End diff --
This is the same code as above, please factor it into a function.
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