Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/4964#discussion_r26551642
--- Diff:
streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobGenerator.scala
---
@@ -44,6 +49,14 @@ class JobGenerator(jobScheduler: JobScheduler) extends
Logging {
private val conf = ssc.conf
private val graph = ssc.graph
+ // Scala treeset makes it difficult to drop items while iterating over
the set. dropWhile
+ // creates a new set, which does not seem very efficient. So use Java
treeset instead.
+ private val activeBatches =
+ Collections.synchronizedSet[Time](new TreeSet[Time](new
TimeComparator()))
--- End diff --
What happened to using Scala Treeset?
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