The variable name as "randomWalk" in node2vec can not unpersist after second iter problem.

[aijianiula0601]

if add the code below:

================ randomWalk.unpersist(blocking = false)

================to:

  if (randomWalkPaths != null) {
    val prevRandomWalkPaths = randomWalkPaths
    randomWalkPaths = randomWalkPaths.union(randomWalk).cache()
    randomWalkPaths.first
    prevRandomWalkPaths.unpersist(blocking = false)
   
    randomWalk.unpersist(blocking = false)

  } else {
    randomWalkPaths = randomWalk
  }

[shboy]

what wrong happends after added?