something wrong with random walk in node2vec_spark?

[rainbow2301]

val edge2attr = graph.triplets.map { edgeTriplet =>
(s"${edgeTriplet.srcId}${edgeTriplet.dstId}", edgeTriplet.attr)
}.repartition(200).cache

(s"${prevNodeId}${currentNodeId}", (srcNodeId, pathBuffer))
}.join(edge2attr).map { case (edge, ((srcNodeId, pathBuffer), attr)) =>

in the code, join key is generated by s"${edgeTriplet.srcId}${edgeTriplet.dstId}",
do we need a separator between the two elements?

[wl142857]

Actually Yes. You should use s"${edgeTriplet.srcId}\t${edgeTriplet.dstId}" instead!

[liliangjie91]

yes.
if you dont add a separator, edge between node #1 and node #1111 will be same with edge between node #11 and node #111 which is '11111'. When using sepaeator,like \t,there will be 1\t1111 vs 11\t111.

And ,i think, thats why u got bad results when your data is very big. Becase the bigger data you use,the more chance you get Wrong edges