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SPARK-1329: Create pid2vid with correct number of partitions #368

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SPARK-1329: Create pid2vid with correct number of partitions #368

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4 changes: 2 additions & 2 deletions graphx/src/main/scala/org/apache/spark/graphx/impl/RoutingTable.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -69,9 +69,9 @@ class RoutingTable(edges: EdgeRDD[_], vertices: VertexRDD[_]) {
vSet.iterator.map { vid => (vid, pid) }
}

val numPartitions = vertices.partitions.size
val numEdgePartitions = edges.partitions.size
vid2pid.partitionBy(vertices.partitioner.get).mapPartitions { iter =>
val pid2vid = Array.fill(numPartitions)(new PrimitiveVector[VertexId])
val pid2vid = Array.fill(numEdgePartitions)(new PrimitiveVector[VertexId])
for ((vid, pid) <- iter) {
pid2vid(pid) += vid
}
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12 changes: 12 additions & 0 deletions graphx/src/test/scala/org/apache/spark/graphx/GraphSuite.scala
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Expand Up @@ -287,4 +287,16 @@ class GraphSuite extends FunSuite with LocalSparkContext {
}
}

test("more edge partitions than vertex partitions") {
withSpark { sc =>
val verts = sc.parallelize(List((1: VertexId, "a"), (2: VertexId, "b")), 1)
val edges = sc.parallelize(List(Edge(1, 2, 0), Edge(2, 1, 0)), 2)
val graph = Graph(verts, edges)
val triplets = graph.triplets.map(et => (et.srcId, et.dstId, et.srcAttr, et.dstAttr))
.collect.toSet
assert(triplets ===
Set((1: VertexId, 2: VertexId, "a", "b"), (2: VertexId, 1: VertexId, "b", "a")))
}
}

}