Github user zhangjiajin commented on a diff in the pull request:
https://github.com/apache/spark/pull/7412#discussion_r35828391
--- Diff: mllib/src/main/scala/org/apache/spark/mllib/fpm/PrefixSpan.scala
---
@@ -44,27 +46,43 @@ class PrefixSpan private (
private var maxPatternLength: Int) extends Logging with Serializable {
/**
+ * The maximum number of items allowed in a projected database before
local processing. If a
+ * projected database exceeds this size, another iteration of
distributed PrefixSpan is run.
+ */
+ private val maxLocalProjDBSize: Long = 10000
--- End diff --
OK
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