Github user ankurdave commented on a diff in the pull request:
https://github.com/apache/spark/pull/497#discussion_r12455215
--- Diff:
graphx/src/main/scala/org/apache/spark/graphx/impl/GraphImpl.scala ---
@@ -89,105 +81,79 @@ class GraphImpl[VD: ClassTag, ED: ClassTag] protected (
}
.partitionBy(new HashPartitioner(numPartitions))
.mapPartitionsWithIndex( { (pid, iter) =>
- val builder = new EdgePartitionBuilder[ED]()(edTag)
+ val builder = new EdgePartitionBuilder[ED, VD]()(edTag, vdTag)
iter.foreach { message =>
val data = message.data
builder.add(data._1, data._2, data._3)
}
val edgePartition = builder.toEdgePartition
Iterator((pid, edgePartition))
- }, preservesPartitioning = true).cache())
- GraphImpl(vertices, newEdges)
+ }, preservesPartitioning = true))
+ GraphImpl.fromExistingRDDs(vertices, newEdges)
}
override def reverse: Graph[VD, ED] = {
- val newETable = edges.mapEdgePartitions((pid, part) => part.reverse)
- GraphImpl(vertices, newETable)
+ new GraphImpl(vertices.reverseRoutingTables(),
replicatedVertexView.reverse())
}
override def mapVertices[VD2: ClassTag](f: (VertexId, VD) => VD2):
Graph[VD2, ED] = {
--- End diff --
Introduce private mapVerticesDelta to work around SPARK-1552
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